version 2.7.0 (#270 )

update dependencies (#269 )
Feature/node20 (#268 )
2024-02-11 11:30:38 +09:00 · 2024-02-11 11:18:12 +09:00 · 2024-02-11 11:04:28 +09:00 · 2023-10-13 10:02:31 +09:00 · 2023-10-13 09:39:50 +09:00 · 2023-10-13 09:06:52 +09:00
46 changed files with 11607 additions and 3866 deletions
--- a/.editorconfig
+++ b/.editorconfig
@ -25,6 +25,13 @@ spaces_around_brackets = none
 indent_brace_style = allman


+# JavaScript/TypeScript
+[*.{js,ts}]
+indent_style = space
+curly_bracket_next_line = false
+indent_brace_style = K&R
+
+
 # JSON/YAML
 [*.{json,babelrc,code-workspace,yml,yaml}]
 indent_style = space
--- a/.eslintrc.yml
+++ b/.eslintrc.yml
@ -14,7 +14,9 @@ parserOptions:
  project: ./tsconfig.json
 rules: # https://eslint.org/docs/rules/
  accessor-pairs: error
-  array-bracket-newline: error
+  array-bracket-newline:
+  - error
+  - consistent
  array-bracket-spacing:
  - error
  - never
@ -29,9 +31,7 @@ rules: # https://eslint.org/docs/rules/
    before: true
  block-scoped-var: error
  block-spacing: error
-  brace-style:
-  - error
-  - allman
+  brace-style: 'off' # see "@typescript-eslint/brace-style"
  callback-return: error
  capitalized-comments: 'off'
  class-methods-use-this: error
@ -87,26 +87,14 @@ rules: # https://eslint.org/docs/rules/
  - below
  indent:
  - error
-  - tab
+  - 4
+  - SwitchCase: 1
  indent-legacy: 'off'
  init-declarations: error
  jsx-quotes: error
  key-spacing: error
  keyword-spacing:
  - error
-  - overrides:
-      catch:
-        after: false
-      for:
-        after: false
-      if:
-        after: false
-      switch:
-        after: false
-      while:
-        after: false
-      with:
-        after: false
  line-comment-position: 'off'
  linebreak-style:
  - error
@ -173,7 +161,7 @@ rules: # https://eslint.org/docs/rules/
  - error
  - max: 1
  no-native-reassign: error
-  no-negated-condition: error
+  no-negated-condition: 'off'
  no-negated-in-lhs: error
  no-nested-ternary: error
  no-new: error
@ -256,7 +244,7 @@ rules: # https://eslint.org/docs/rules/
  rest-spread-spacing:
  - error
  - never
-  semi: error
+  semi: 'off' # see "@typescript-eslint/semi"
  semi-spacing: error
  semi-style:
  - error
@ -308,8 +296,25 @@ rules: # https://eslint.org/docs/rules/

  # @typescript-eslint plugin
  "@typescript-eslint/ban-ts-ignore": 'off'
+  "@typescript-eslint/brace-style":
+  - error
+  - 1tbs
+  "@typescript-eslint/member-delimiter-style":
+  - error
+  - multiline:
+      delimiter: semi
+      requireLast: true
+    singleline:
+      delimiter: semi
+      requireLast: true
  "@typescript-eslint/no-empty-interface": 'off'
+  "@typescript-eslint/no-floating-promises": error
  "@typescript-eslint/no-use-before-define":
  - error
  - functions: false
-  "@typescript-eslint/strict-boolean-expressions": error
+  "@typescript-eslint/semi": error
+  "@typescript-eslint/strict-boolean-expressions":
+  - error
+  - allowString: false
+    allowNumber: false
+    allowNullableObject: false
--- a/.github/FUNDING.yml
+++ b/.github/FUNDING.yml
@ -0,0 +1,4 @@
+github:
+- shimataro
+custom:
+- "https://www.paypal.me/shimataro"
--- a/.github/actions/cache-npm/action.yml
+++ b/.github/actions/cache-npm/action.yml
@ -0,0 +1,25 @@
+# https://docs.github.com/en/actions/creating-actions/creating-a-composite-action
+name: Cache NPM
+description: Composite action (cache NPM)
+
+runs:
+  using: composite
+  steps:
+    # https://github.com/actions/cache/blob/master/examples.md#node---npm
+    # https://docs.github.com/en/actions/using-workflows/workflow-commands-for-github-actions#setting-an-output-parameter
+    - name: Get NPM cache directory
+      run: echo "NPM_CACHE_DIRECTORY=$(npm config get cache)" >> ${{ github.env }} # use "github.env" instead of "github.output"; if use "github.output", "Warning: Input required and not supplied: path" is displayed on post-process
+      shell: pwsh # use PowerShell; Bash doesn't work on Windows because the value of "github.env" is like "D:\a\_temp\_runner_file_commands\set_env_XXX".
+
+    - name: Get Node.js version
+      run: echo "NODEJS_VERSION=$(node -v)" >> ${{ github.env }}
+      shell: pwsh
+
+    - name: Cache NPM modules
+      uses: actions/cache@v3
+      with:
+        path: ${{ env.NPM_CACHE_DIRECTORY }}
+        key: npm-${{ runner.os }}-${{ runner.arch }}-${{ env.NODEJS_VERSION }}-${{ hashFiles('package-lock.json') }}
+        restore-keys: |
+          npm-${{ runner.os }}-${{ runner.arch }}-${{ env.NODEJS_VERSION }}-
+          npm-${{ runner.os }}-${{ runner.arch }}
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@ -4,7 +4,6 @@ name: Build

 on:
 - push
- pull_request

 jobs:
  build:
@ -13,26 +12,31 @@ jobs:
    strategy:
      matrix:
        os:
-        - Windows-2019
-        - macOS-10.15
-        - Ubuntu-16.04
-        - Ubuntu-18.04
-        - Ubuntu-20.04
+        - windows-2019
+        - windows-2022
+        - macos-11
+        - macos-12
+        - ubuntu-20.04
+        - ubuntu-22.04
        nodejs:
-        - 12
+        - 20
      fail-fast: false
    steps:
    - name: Turn off auto-crlf
      run: git config --global core.autocrlf false
    - name: Checkout source codes
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
    - name: Install Node.js
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v4
      with:
        node-version: ${{ matrix.nodejs }}
+    - name: Cache NPM
+      uses: ./.github/actions/cache-npm
    - name: Install dependencies
      run: npm ci
    - name: Build
      run: npm run build
+    - name: Exit if differ (forgot to commit dist dir?)
+      run: git diff --exit-code --quiet
    - name: Verify
      run: npm run verify
--- a/.github/workflows/reusable-verify.yml
+++ b/.github/workflows/reusable-verify.yml
@ -0,0 +1,278 @@
+# https://docs.github.com/en/actions/using-workflows/reusing-workflows
+name: Reusable workflow (verify)
+
+on:
+  workflow_call:
+    inputs:
+      os:
+        required: true
+        type: string
+        description: host OS that CI 'runs-on'
+      docker_image:
+        required: false
+        type: string
+        default: ""
+        description: Docker image name
+      package_installation_command:
+        required: false
+        type: string
+        default: ""
+        description: package installation command
+    secrets:
+      SSH_KEY_PEM:
+        required: true
+        description: SSH private key (PEM format)
+      SSH_KEY_PKCS8:
+        required: true
+        description: SSH private key (PKCS8 format)
+      SSH_KEY_RFC4716:
+        required: true
+        description: SSH private key (RFC4716 format)
+
+jobs:
+  ssh-pem:
+    name: Connect to github.com (PEM format)
+    runs-on: ${{ inputs.os }}
+    container: ${{ inputs.docker_image }}
+    steps:
+    - name: Install packages
+      run: ${{ inputs.package_installation_command }}
+      if: ${{ inputs.package_installation_command != '' }}
+    - name: Checkout source codes
+      uses: actions/checkout@v3
+    - name: Install SSH key
+      uses: ./.
+      with:
+        key: ${{ secrets.SSH_KEY_PEM }}
+        known_hosts: unnecessary
+    - name: git clone through SSH
+      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
+
+  ssh-pem-bitbucket:
+    name: Connect to bitbucket.org (PEM format)
+    runs-on: ${{ inputs.os }}
+    container: ${{ inputs.docker_image }}
+    steps:
+    - name: Install packages
+      run: ${{ inputs.package_installation_command }}
+      if: ${{ inputs.package_installation_command != '' }}
+    - name: Checkout source codes
+      uses: actions/checkout@v3
+    - name: Install SSH key
+      uses: ./.
+      with:
+        key: ${{ secrets.SSH_KEY_PEM }}
+        known_hosts: |
+          bitbucket.org ssh-rsa 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
+          bitbucket.org ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBPIQmuzMBuKdWeF4+a2sjSSpBK0iqitSQ+5BM9KhpexuGt20JpTVM7u5BDZngncgrqDMbWdxMWWOGtZ9UgbqgZE=
+          bitbucket.org ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIazEu89wgQZ4bqs3d63QSMzYVa0MuJ2e2gKTKqu+UUO
+    - name: git clone through SSH
+      run: git clone git@bitbucket.org:shimataro999/ssh-test.git tmp
+
+  ssh-pkcs8:
+    name: Connect to github.com (PKCS8 format)
+    runs-on: ${{ inputs.os }}
+    container: ${{ inputs.docker_image }}
+    steps:
+    - name: Install packages
+      run: ${{ inputs.package_installation_command }}
+      if: ${{ inputs.package_installation_command != '' }}
+    - name: Checkout source codes
+      uses: actions/checkout@v3
+    - name: Install SSH key
+      uses: ./.
+      with:
+        key: ${{ secrets.SSH_KEY_PKCS8 }}
+        known_hosts: unnecessary
+    - name: git clone through SSH
+      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
+
+  ssh-pkcs8-bitbucket:
+    name: Connect to bitbucket.org (PKCS8 format)
+    runs-on: ${{ inputs.os }}
+    container: ${{ inputs.docker_image }}
+    steps:
+    - name: Install packages
+      run: ${{ inputs.package_installation_command }}
+      if: ${{ inputs.package_installation_command != '' }}
+    - name: Checkout source codes
+      uses: actions/checkout@v3
+    - name: Install SSH key
+      uses: ./.
+      with:
+        key: ${{ secrets.SSH_KEY_PKCS8 }}
+        known_hosts: |
+          bitbucket.org ssh-rsa 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
+          bitbucket.org ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBPIQmuzMBuKdWeF4+a2sjSSpBK0iqitSQ+5BM9KhpexuGt20JpTVM7u5BDZngncgrqDMbWdxMWWOGtZ9UgbqgZE=
+          bitbucket.org ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIazEu89wgQZ4bqs3d63QSMzYVa0MuJ2e2gKTKqu+UUO
+    - name: git clone through SSH
+      run: git clone git@bitbucket.org:shimataro999/ssh-test.git tmp
+
+  ssh-rfc4716:
+    name: Connect to github.com (RFC4716 format)
+    runs-on: ${{ inputs.os }}
+    container: ${{ inputs.docker_image }}
+    steps:
+    - name: Install packages
+      run: ${{ inputs.package_installation_command }}
+      if: ${{ inputs.package_installation_command != '' }}
+    - name: Checkout source codes
+      uses: actions/checkout@v3
+    - name: Install SSH key
+      uses: ./.
+      with:
+        key: ${{ secrets.SSH_KEY_RFC4716 }}
+        known_hosts: unnecessary
+    - name: git clone through SSH
+      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
+
+  ssh-rfc4716-bitbucket:
+    name: Connect to bitbucket.org (RFC4716 format)
+    runs-on: ${{ inputs.os }}
+    container: ${{ inputs.docker_image }}
+    steps:
+    - name: Install packages
+      run: ${{ inputs.package_installation_command }}
+      if: ${{ inputs.package_installation_command != '' }}
+    - name: Checkout source codes
+      uses: actions/checkout@v3
+    - name: Install SSH key
+      uses: ./.
+      with:
+        key: ${{ secrets.SSH_KEY_RFC4716 }}
+        known_hosts: |
+          bitbucket.org ssh-rsa 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
+          bitbucket.org ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBPIQmuzMBuKdWeF4+a2sjSSpBK0iqitSQ+5BM9KhpexuGt20JpTVM7u5BDZngncgrqDMbWdxMWWOGtZ9UgbqgZE=
+          bitbucket.org ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIazEu89wgQZ4bqs3d63QSMzYVa0MuJ2e2gKTKqu+UUO
+    - name: git clone through SSH
+      run: git clone git@bitbucket.org:shimataro999/ssh-test.git tmp
+
+  key_if_exists_replace-key_exists:
+    name: if_key_exists=replace / key exists
+    runs-on: ${{ inputs.os }}
+    container: ${{ inputs.docker_image }}
+    steps:
+    - name: Install packages
+      run: ${{ inputs.package_installation_command }}
+      if: ${{ inputs.package_installation_command != '' }}
+    - name: Checkout source codes
+      uses: actions/checkout@v3
+    - name: Install SSH key (dummy)
+      uses: ./.
+      with:
+        key: "dummy" # replaced
+        known_hosts: unnecessary
+    - name: Install SSH key (replaces existing key)
+      uses: ./.
+      with:
+        key: ${{ secrets.SSH_KEY_PEM }}
+        known_hosts: unnecessary
+        if_key_exists: replace
+    - name: git clone through SSH
+      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
+
+  key_if_exists_replace-key_doesnt_exist:
+    name: if_key_exists=replace / key doesn't exist
+    runs-on: ${{ inputs.os }}
+    container: ${{ inputs.docker_image }}
+    steps:
+    - name: Install packages
+      run: ${{ inputs.package_installation_command }}
+      if: ${{ inputs.package_installation_command != '' }}
+    - name: Checkout source codes
+      uses: actions/checkout@v3
+    - name: Install SSH key
+      uses: ./.
+      with:
+        key: ${{ secrets.SSH_KEY_PEM }}
+        known_hosts: unnecessary
+        if_key_exists: replace
+    - name: git clone through SSH
+      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
+
+  key_if_exists_ignore-key_exists:
+    name: if_key_exists=ignore / key exists
+    runs-on: ${{ inputs.os }}
+    container: ${{ inputs.docker_image }}
+    steps:
+    - name: Install packages
+      run: ${{ inputs.package_installation_command }}
+      if: ${{ inputs.package_installation_command != '' }}
+    - name: Checkout source codes
+      uses: actions/checkout@v3
+    - name: Install SSH key
+      uses: ./.
+      with:
+        key: ${{ secrets.SSH_KEY_PEM }}
+        known_hosts: unnecessary
+    - name: Install SSH key (does nothing)
+      uses: ./.
+      with:
+        key: "dummy" # ignored
+        known_hosts: unnecessary
+        if_key_exists: ignore
+    - name: git clone through SSH
+      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
+
+  key_if_exists_ignore-key_doesnt_exist:
+    name: if_key_exists=ignore / key doesn't exist
+    runs-on: ${{ inputs.os }}
+    container: ${{ inputs.docker_image }}
+    steps:
+    - name: Install packages
+      run: ${{ inputs.package_installation_command }}
+      if: ${{ inputs.package_installation_command != '' }}
+    - name: Checkout source codes
+      uses: actions/checkout@v3
+    - name: Install SSH key
+      uses: ./.
+      with:
+        key: ${{ secrets.SSH_KEY_PEM }}
+        known_hosts: unnecessary
+        if_key_exists: ignore
+    - name: git clone through SSH
+      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
+
+  key_if_exists_fail-key_exists:
+    name: if_key_exists=fail / key exists
+    runs-on: ${{ inputs.os }}
+    container: ${{ inputs.docker_image }}
+    steps:
+    - name: Install packages
+      run: ${{ inputs.package_installation_command }}
+      if: ${{ inputs.package_installation_command != '' }}
+    - name: Checkout source codes
+      uses: actions/checkout@v3
+    - name: Install SSH key
+      uses: ./.
+      with:
+        key: ${{ secrets.SSH_KEY_PEM }}
+        known_hosts: unnecessary
+    - name: Install SSH key (fails)
+      uses: ./.
+      with:
+        key: "dummy" # fails
+        known_hosts: unnecessary
+        if_key_exists: fail
+      continue-on-error: true
+    - name: git clone through SSH
+      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
+
+  key_if_exists_fail-key_doesnt_exist:
+    name: if_key_exists=fail / key doesn't exist
+    runs-on: ${{ inputs.os }}
+    container: ${{ inputs.docker_image }}
+    steps:
+    - name: Install packages
+      run: ${{ inputs.package_installation_command }}
+      if: ${{ inputs.package_installation_command != '' }}
+    - name: Checkout source codes
+      uses: actions/checkout@v3
+    - name: Install SSH key
+      uses: ./.
+      with:
+        key: ${{ secrets.SSH_KEY_PEM }}
+        known_hosts: unnecessary
+        if_key_exists: fail
+    - name: git clone through SSH
+      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
--- a/.github/workflows/verify-on-container-alpine.yml
+++ b/.github/workflows/verify-on-container-alpine.yml
@ -0,0 +1,26 @@
+# https://help.github.com/en/articles/workflow-syntax-for-github-actions
+name: Docker container (Alpine Linux)
+
+on:
+- push
+
+jobs:
+  verify:
+    name: Verify
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+        - ubuntu-20.04
+        - ubuntu-22.04
+        docker_image:
+        - alpine:3.10
+        - alpine:3.11
+        - alpine:3.12
+        - alpine:3.13
+    uses: "./.github/workflows/reusable-verify.yml"
+    with:
+      os: ${{ matrix.os }}
+      docker_image: ${{ matrix.docker_image }}
+      package_installation_command: apk add openssh-client git
+    secrets: inherit
--- a/.github/workflows/verify-on-container-centos.yml
+++ b/.github/workflows/verify-on-container-centos.yml
@ -0,0 +1,23 @@
+# https://help.github.com/en/articles/workflow-syntax-for-github-actions
+name: Docker container (CentOS)
+
+on:
+- push
+
+jobs:
+  verify:
+    name: Verify
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+        - ubuntu-20.04
+        - ubuntu-22.04
+        docker_image:
+        - quay.io/centos/centos:stream8
+    uses: "./.github/workflows/reusable-verify.yml"
+    with:
+      os: ${{ matrix.os }}
+      docker_image: ${{ matrix.docker_image }}
+      package_installation_command: yum install -y git openssh-clients
+    secrets: inherit
--- a/.github/workflows/verify-on-container-ubuntu.yml
+++ b/.github/workflows/verify-on-container-ubuntu.yml
@ -0,0 +1,26 @@
+# https://help.github.com/en/articles/workflow-syntax-for-github-actions
+name: Docker container (Ubuntu)
+
+on:
+- push
+
+jobs:
+  verify:
+    name: Verify
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+        - ubuntu-20.04
+        - ubuntu-22.04
+        docker_image:
+        - ubuntu:20.04
+        - ubuntu:22.04
+    uses: "./.github/workflows/reusable-verify.yml"
+    with:
+      os: ${{ matrix.os }}
+      docker_image: ${{ matrix.docker_image }}
+      package_installation_command: |
+        apt update
+        apt install -y openssh-client git
+    secrets: inherit
--- a/.github/workflows/verify-on-macos-1015.yml
+++ b/.github/workflows/verify-on-macos-1015.yml
@ -1,45 +0,0 @@
-# https://help.github.com/en/articles/workflow-syntax-for-github-actions
-
-name: macOS Catalina
-
-on:
- push
- pull_request
-
-jobs:
-  ssh:
-    name: Connect to github.com
-    runs-on: macos-10.15
-    steps:
-    - name: Checkout source codes
-      uses: actions/checkout@v2
-    - name: Install SSH key
-      uses: ./.
-      with:
-        key: ${{ secrets.SSH_KEY }}
-        known_hosts: ${{ secrets.KNOWN_HOSTS }}
-    - name: print created files
-      run: ls -l ~/.ssh
-    - name: git clone through SSH
-      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
-  ssh-with-name:
-    name: Connect to github.com with name and config
-    runs-on: macos-10.15
-    steps:
-    - name: Checkout source codes
-      uses: actions/checkout@v2
-    - name: Install SSH key
-      uses: ./.
-      with:
-        key: ${{ secrets.SSH_KEY }}
-        known_hosts: ${{ secrets.KNOWN_HOSTS }}
-        name: ssh_key_name # optional
-        config: | # optional
-          Host github
-            Hostname github.com
-            User git
-            IdentityFile ~/.ssh/ssh_key_name
-    - name: print created files
-      run: ls -l ~/.ssh
-    - name: git clone through SSH
-      run: git clone github:shimataro/ssh-key-action.git tmp
--- a/.github/workflows/verify-on-macos.yml
+++ b/.github/workflows/verify-on-macos.yml
@ -0,0 +1,19 @@
+# https://help.github.com/en/articles/workflow-syntax-for-github-actions
+name: macOS
+
+on:
+- push
+
+jobs:
+  verify:
+    name: Verify
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+        - macos-11
+        - macos-12
+    uses: "./.github/workflows/reusable-verify.yml"
+    with:
+      os: ${{ matrix.os }}
+    secrets: inherit
--- a/.github/workflows/verify-on-ubuntu-1604.yml
+++ b/.github/workflows/verify-on-ubuntu-1604.yml
@ -1,45 +0,0 @@
-# https://help.github.com/en/articles/workflow-syntax-for-github-actions
-
-name: Ubuntu 16.04
-
-on:
- push
- pull_request
-
-jobs:
-  ssh:
-    name: Connect to github.com
-    runs-on: ubuntu-16.04
-    steps:
-    - name: Checkout source codes
-      uses: actions/checkout@v2
-    - name: Install SSH key
-      uses: ./.
-      with:
-        key: ${{ secrets.SSH_KEY }}
-        known_hosts: ${{ secrets.KNOWN_HOSTS }}
-    - name: print created files
-      run: ls -l ~/.ssh
-    - name: git clone through SSH
-      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
-  ssh-with-name:
-    name: Connect to github.com with name and config
-    runs-on: ubuntu-16.04
-    steps:
-    - name: Checkout source codes
-      uses: actions/checkout@v2
-    - name: Install SSH key
-      uses: ./.
-      with:
-        key: ${{ secrets.SSH_KEY }}
-        known_hosts: ${{ secrets.KNOWN_HOSTS }}
-        name: ssh_key_name # optional
-        config: | # optional
-          Host github
-            Hostname github.com
-            User git
-            IdentityFile ~/.ssh/ssh_key_name
-    - name: print created files
-      run: ls -l ~/.ssh
-    - name: git clone through SSH
-      run: git clone github:shimataro/ssh-key-action.git tmp
--- a/.github/workflows/verify-on-ubuntu-1804.yml
+++ b/.github/workflows/verify-on-ubuntu-1804.yml
@ -1,45 +0,0 @@
-# https://help.github.com/en/articles/workflow-syntax-for-github-actions
-
-name: Ubuntu 18.04
-
-on:
- push
- pull_request
-
-jobs:
-  ssh:
-    name: Connect to github.com
-    runs-on: ubuntu-18.04
-    steps:
-    - name: Checkout source codes
-      uses: actions/checkout@v2
-    - name: Install SSH key
-      uses: ./.
-      with:
-        key: ${{ secrets.SSH_KEY }}
-        known_hosts: ${{ secrets.KNOWN_HOSTS }}
-    - name: print created files
-      run: ls -l ~/.ssh
-    - name: git clone through SSH
-      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
-  ssh-with-name:
-    name: Connect to github.com with name and config
-    runs-on: ubuntu-18.04
-    steps:
-    - name: Checkout source codes
-      uses: actions/checkout@v2
-    - name: Install SSH key
-      uses: ./.
-      with:
-        key: ${{ secrets.SSH_KEY }}
-        known_hosts: ${{ secrets.KNOWN_HOSTS }}
-        name: ssh_key_name # optional
-        config: | # optional
-          Host github
-            Hostname github.com
-            User git
-            IdentityFile ~/.ssh/ssh_key_name
-    - name: print created files
-      run: ls -l ~/.ssh
-    - name: git clone through SSH
-      run: git clone github:shimataro/ssh-key-action.git tmp
--- a/.github/workflows/verify-on-ubuntu-2004.yml
+++ b/.github/workflows/verify-on-ubuntu-2004.yml
@ -1,45 +0,0 @@
-# https://help.github.com/en/articles/workflow-syntax-for-github-actions
-
-name: Ubuntu 20.04
-
-on:
- push
- pull_request
-
-jobs:
-  ssh:
-    name: Connect to github.com
-    runs-on: ubuntu-20.04
-    steps:
-    - name: Checkout source codes
-      uses: actions/checkout@v2
-    - name: Install SSH key
-      uses: ./.
-      with:
-        key: ${{ secrets.SSH_KEY }}
-        known_hosts: ${{ secrets.KNOWN_HOSTS }}
-    - name: print created files
-      run: ls -l ~/.ssh
-    - name: git clone through SSH
-      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
-  ssh-with-name:
-    name: Connect to github.com with name and config
-    runs-on: ubuntu-20.04
-    steps:
-    - name: Checkout source codes
-      uses: actions/checkout@v2
-    - name: Install SSH key
-      uses: ./.
-      with:
-        key: ${{ secrets.SSH_KEY }}
-        known_hosts: ${{ secrets.KNOWN_HOSTS }}
-        name: ssh_key_name # optional
-        config: | # optional
-          Host github
-            Hostname github.com
-            User git
-            IdentityFile ~/.ssh/ssh_key_name
-    - name: print created files
-      run: ls -l ~/.ssh
-    - name: git clone through SSH
-      run: git clone github:shimataro/ssh-key-action.git tmp
--- a/.github/workflows/verify-on-ubuntu.yml
+++ b/.github/workflows/verify-on-ubuntu.yml
@ -0,0 +1,19 @@
+# https://help.github.com/en/articles/workflow-syntax-for-github-actions
+name: Ubuntu
+
+on:
+- push
+
+jobs:
+  verify:
+    name: Verify
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+        - ubuntu-20.04
+        - ubuntu-22.04
+    uses: "./.github/workflows/reusable-verify.yml"
+    with:
+      os: ${{ matrix.os }}
+    secrets: inherit
--- a/.github/workflows/verify-on-windows-server-2019.yml
+++ b/.github/workflows/verify-on-windows-server-2019.yml
@ -1,45 +0,0 @@
-# https://help.github.com/en/articles/workflow-syntax-for-github-actions
-
-name: Windows Server 2019
-
-on:
- push
- pull_request
-
-jobs:
-  ssh:
-    name: Connect to github.com
-    runs-on: windows-2019
-    steps:
-    - name: Checkout source codes
-      uses: actions/checkout@v2
-    - name: Install SSH key
-      uses: ./.
-      with:
-        key: ${{ secrets.SSH_KEY }}
-        known_hosts: ${{ secrets.KNOWN_HOSTS }}
-    - name: print created files
-      run: ls ~/.ssh
-    - name: git clone through SSH
-      run: git clone git@github.com:shimataro/ssh-key-action.git tmp
-  ssh-with-name:
-    name: Connect to github.com with name and config
-    runs-on: windows-2019
-    steps:
-    - name: Checkout source codes
-      uses: actions/checkout@v2
-    - name: Install SSH key
-      uses: ./.
-      with:
-        key: ${{ secrets.SSH_KEY }}
-        known_hosts: ${{ secrets.KNOWN_HOSTS }}
-        name: ssh_key_name # optional
-        config: | # optional
-          Host github
-            Hostname github.com
-            User git
-            IdentityFile ~/.ssh/ssh_key_name
-    - name: print created files
-      run: ls ~/.ssh
-    - name: git clone through SSH
-      run: git clone github:shimataro/ssh-key-action.git tmp
--- a/.github/workflows/verify-on-windows.yml
+++ b/.github/workflows/verify-on-windows.yml
@ -0,0 +1,19 @@
+# https://help.github.com/en/articles/workflow-syntax-for-github-actions
+name: Windows
+
+on:
+- push
+
+jobs:
+  verify:
+    name: Verify
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+        - windows-2019
+        - windows-2022
+    uses: "./.github/workflows/reusable-verify.yml"
+    with:
+      os: ${{ matrix.os }}
+    secrets: inherit
--- a/.gitignore
+++ b/.gitignore
@ -12,3 +12,9 @@ Thumbs.db
 # patch/merge
 *.orig
 *.rej
+
+# IDE
+/.idea/
+
+# Node.js modules
+/node_modules/
--- a/.markdownlint.yml
+++ b/.markdownlint.yml
@ -1,7 +1,7 @@
 MD007: # ul-indent
  indent: 4
 MD013: # line-length
-  line_length: 255
+  line_length: 1024
 MD024: # no-duplicate-heading
  siblings_only: true
 MD026: false # no-trailing-punctuation
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -7,6 +7,89 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.

 ## [Unreleased]

+## [2.7.0] - 2024-02-11
+
+### Others
+
+* Update to Node.js v20 (thanks [@princemaple](https://github.com/princemaple))
+* drop old containers; Ubuntu 16.04, and CentOS 7
+
+## [2.6.1] - 2023-10-13
+
+### Fixed
+
+* JSON parse error on exit, if `if_key_exists`=`fail` and key exists
+
+## [2.6.0] - 2023-10-11
+
+### Others
+
+* back up and restore files when exist (thanks [@bambeusz](https://github.com/bambeusz))
+* remove `macos-10.15` and `ubuntu-18.04` virtual environment
+
+## [2.5.1] - 2023-03-25
+
+### Hotfix
+
+* update github.com key: <https://github.blog/2023-03-23-we-updated-our-rsa-ssh-host-key/> (thanks [@phlax](https://github.com/phlax))
+
+## [2.5.0] - 2022-12-24
+
+### Added
+
+* remove SSH directory at the end of workflow
+
+## [2.4.0] - 2022-11-03
+
+### Added
+
+* always set server key of `github.com` to `known_hosts`
+
+### Fixed
+
+* usage of `rsync` in README
+
+### Others
+
+* add `windows-2022`, and `macos-11` (thanks [@ViacheslavKudinov](https://github.com/ViacheslavKudinov))
+* add `macos-12`, `ubuntu-22.04`, and `CentOS 8 Stream (Docker container)`
+* drop `ubuntu-16.04`, and `CentOS 8 (Docker container)`
+* [update Node.js version to 16](https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/) (thanks [@duddu](https://github.com/duddu))
+
+## [2.3.1] - 2021-08-01
+
+### Security
+
+* Fix [CVE-2021-33502](https://github.com/advisories/GHSA-px4h-xg32-q955)
+
+### Others
+
+* add `windows-2016` virtual environment
+* [remove `ubuntu-16.04` virtual environment](https://github.blog/changelog/2021-04-29-github-actions-ubuntu-16-04-lts-virtual-environment-will-be-removed-on-september-20-2021/)
+
+## [2.3.0] - 2021-03-21
+
+### Added
+
+* `if_key_exists` parameter
+* `known_hosts: unnecessary`
+* Support Alpine Linux Docker container
+
+## [2.2.0] - 2021-02-27
+
+### Added
+
+* Support Ubuntu/CentOS Docker container (thanks [@kujaomega](https://github.com/kujaomega))
+* Support PKCS8/RFC4716 formats (thanks [@tats-u](https://github.com/tats-u))
+
+### Changed
+
+* Bundle dependencies (thanks [@tats-u](https://github.com/tats-u))
+
+### Fixed
+
+* comments in README (thanks [@KimSoungRyoul](https://github.com/KimSoungRyoul))
+
 ## [2.1.0] - 2020-08-15

 ### Changed
@ -123,7 +206,16 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.

 * First release.

-[Unreleased]: https://github.com/shimataro/ssh-key-action/compare/v2.1.0...HEAD
+[Unreleased]: https://github.com/shimataro/ssh-key-action/compare/v2.7.0...HEAD
+[2.7.0]: https://github.com/shimataro/ssh-key-action/compare/v2.6.1...v2.7.0
+[2.6.1]: https://github.com/shimataro/ssh-key-action/compare/v2.6.0...v2.6.1
+[2.6.0]: https://github.com/shimataro/ssh-key-action/compare/v2.5.1...v2.6.0
+[2.5.1]: https://github.com/shimataro/ssh-key-action/compare/v2.5.0...v2.5.1
+[2.5.0]: https://github.com/shimataro/ssh-key-action/compare/v2.4.0...v2.5.0
+[2.4.0]: https://github.com/shimataro/ssh-key-action/compare/v2.3.1...v2.4.0
+[2.3.1]: https://github.com/shimataro/ssh-key-action/compare/v2.3.0...v2.3.1
+[2.3.0]: https://github.com/shimataro/ssh-key-action/compare/v2.2.0...v2.3.0
+[2.2.0]: https://github.com/shimataro/ssh-key-action/compare/v2.1.0...v2.2.0
 [2.1.0]: https://github.com/shimataro/ssh-key-action/compare/v2.0.3...v2.1.0
 [2.0.3]: https://github.com/shimataro/ssh-key-action/compare/v2.0.2...v2.0.3
 [2.0.2]: https://github.com/shimataro/ssh-key-action/compare/v2.0.1...v2.0.2
--- a/README.md
+++ b/README.md
@ -1,11 +1,12 @@
 # Install SSH Key

 [![Build][image-build]][link-build]
-[![Windows Server 2019][image-verify-windows-2019]][link-verify-windows-2019]
-[![macOS Catalina][image-verify-macos-1015]][link-verify-macos-1015]
-[![Ubuntu 20.04][image-verify-ubuntu-2004]][link-verify-ubuntu-2004]
-[![Ubuntu 18.04][image-verify-ubuntu-1804]][link-verify-ubuntu-1804]
-[![Ubuntu 16.04][image-verify-ubuntu-1604]][link-verify-ubuntu-1604]
+[![Windows][image-verify-windows]][link-verify-windows]
+[![macOS][image-verify-macos]][link-verify-macos]
+[![Ubuntu][image-verify-ubuntu]][link-verify-ubuntu]
+[![Docker container (Ubuntu)][image-verify-docker-container-ubuntu]][link-verify-docker-container-ubuntu]
+[![Docker container (CentOS)][image-verify-docker-container-centos]][link-verify-docker-container-centos]
+[![Docker container (Alpine Linux)][image-verify-docker-container-alpine]][link-verify-docker-container-alpine]
 [![Release][image-release]][link-release]
 [![License][image-license]][link-license]
 [![Stars][image-stars]][link-stars]
@ -14,16 +15,18 @@ This action installs SSH key in `~/.ssh`.

 Useful for SCP, SFTP, and `rsync` over SSH in deployment script.

-**Works on all [virtual environments](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/virtual-environments-for-github-hosted-runners#supported-runners-and-hardware-resources) --**
-**Windows Server 2019, macOS Catalina, Ubuntu 20.04, Ubuntu 18.04, and Ubuntu 16.04.**
+tested on:
+
+* [all available virtual machines](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/virtual-environments-for-github-hosted-runners#supported-runners-and-hardware-resources) (Windows Server 2022/2019, macOS Monterey/Big Sur, and Ubuntu 22.04/20.04)
+* [Docker container (Ubuntu)](https://hub.docker.com/_/ubuntu) / requires `openssh-client` package; `apt install -y openssh-client`
+* [Docker container (CentOS)](https://quay.io/repository/centos/centos) / requires `openssh-clients` package; `yum install -y openssh-clients`
+* [Docker container (Alpine Linux)](https://hub.docker.com/_/alpine) / requires `openssh-client` package; `apk add openssh-client`

 ## Usage

 Add your SSH key to your product secrets by clicking `Settings` - `Secrets` - `Add a new secret` beforehand.

-**NOTE:** OPENSSH format (key begins with `-----BEGIN OPENSSH PRIVATE KEY-----`) may not work due to OpenSSH version on VM.
-Please use PEM format (begins with `-----BEGIN RSA PRIVATE KEY-----`) instead.
-In order to convert your key inline to PEM format simply use `ssh-keygen -p -m PEM -f ~/.ssh/id_rsa`.
+PEM(RSA), PKCS8, and RFC4716(OpenSSH) formats are OK.

 ```yaml
 runs-on: ubuntu-latest
@ -35,18 +38,24 @@ steps:
    name: id_rsa # optional
    known_hosts: ${{ secrets.KNOWN_HOSTS }}
    config: ${{ secrets.CONFIG }} # ssh_config; optional
- name: rsync over ssh
-  run: rsync ./foo/ user@remote:bar/
+    if_key_exists: fail # replace / ignore / fail; optional (defaults to fail)
+- name: rsync over SSH
+  run: rsync -r ./foo/ user@remote:bar/
 ```

 See [Workflow syntax for GitHub Actions](https://help.github.com/en/articles/workflow-syntax-for-github-actions) for details.

+**NOTE:**
+
+* Server key of `github.com` will be always set to `known_hosts`.
+* SSH keys will be removed at the end of workflow.
+
 ### Install multiple keys

 If you want to install multiple keys, call this action multiple times.
 It is useful for port forwarding.

-**NOTE:**  When this action is called multiple times, **the contents of `known_hosts` and `config` will be appended**. `key` must be saved as different name, by using `name` option.
+**NOTE:** When this action is called multiple times, **the contents of `known_hosts` and `config` will be appended**. `key` must be saved as different name, by using `name` option.

 ```yaml
 runs-on: ubuntu-latest
@ -67,8 +76,8 @@ steps:
  with:
    key: ${{ secrets.SSH_KEY_OF_TARGET }}
    name: id_rsa-target
-    known_hosts: ${{ secrets.KNOWN_HOSTS_OF_TARGET }} # will be appended!
-    config: |                                         # will be appended!
+    known_hosts: ${{ secrets.KNOWN_HOSTS_OF_TARGET }} # will be appended to existing .ssh/known_hosts
+    config: |                                         # will be appended to existing .ssh/config
      Host target
        HostName yyy.yyy.yyy.yyy
        User user-of-target
@ -84,12 +93,17 @@ steps:

 Check below:

-* `Load key "/HOME/.ssh/id_rsa": invalid format`:
-    * OPENSSH format (key begins with `-----BEGIN OPENSSH PRIVATE KEY-----`) may not work.
-    * Use PEM format (begins with `-----BEGIN RSA PRIVATE KEY-----`). Convert it from OPENSSH format using `ssh-keygen -p -m PEM -f ~/.ssh/id_rsa`
 * `Host key verification failed.`:
    * Set `known_hosts` parameter correctly (use `ssh-keyscan` command).

+### I want to replace/ignore key if exists.
+
+Use `if_key_exists` parameter.
+
+* `replace`: replaces key
+* `ignore`: does nothing
+* `fail`: fails (default)
+
 ### How do I use encrypted SSH key?

 This action doesn't support encrypted key directly.
@ -105,7 +119,7 @@ Here are some solutions:
 I recommend **rsync via bastion**.

 ```bash
-rsync -e "ssh bastion ssh" ./foo/ target:bar/
+rsync -r -e "ssh bastion ssh" ./foo/ target:bar/
 ```

 It has some advantages over other methods:
@ -124,6 +138,18 @@ It has some advantages over other methods:
        * And will be updated continuously.
    * if security incident ―e.g., private key leaked― occurs, it's OK just to remove `authorized_keys` on bastion.

+### I want to omit `known_hosts`.
+
+First of all, you have to understand that it is NOT secure to SSH with no `known_hosts` and using `StrictHostKeyChecking=no` option.
+
+Why do you want to omit it?
+If the reason is **"I'm not understanding about the function of `known_hosts`"** or **"It's bother to fetch server key"**, you should not omit.
+If **"It is hard to prefetch server key because the server will be created dynamically"**, you can use bastion server.
+
+**"`known_hosts` is unnecessary because I'm using secure method for SSH, such as SSHFP and signed server key."** — OK, here is a special value to omit `known_hosts`.
+You should use it ONLY IF you are using secure methods...
+It is `known_hosts: unnecessary`.
+
 ## License

 The scripts and documentation in this project are released under the [MIT License](LICENSE)
@ -133,17 +159,19 @@ The scripts and documentation in this project are released under the [MIT Licens
 See [CHANGELOG.md](CHANGELOG.md).

 [image-build]: https://github.com/shimataro/ssh-key-action/workflows/Build/badge.svg?event=push&branch=v2
-[link-build]: https://github.com/shimataro/ssh-key-action/actions?query=workflow%3ABuild
-[image-verify-windows-2019]: https://github.com/shimataro/ssh-key-action/workflows/Windows%20Server%202019/badge.svg?event=push&branch=v2
-[link-verify-windows-2019]: https://github.com/shimataro/ssh-key-action/actions?query=workflow%3A%22Windows+Server+2019%22
-[image-verify-macos-1015]: https://github.com/shimataro/ssh-key-action/workflows/macOS%20Catalina/badge.svg?event=push&branch=v2
-[link-verify-macos-1015]: https://github.com/shimataro/ssh-key-action/actions?query=workflow%3A%22macOS+Catalina%22
-[image-verify-ubuntu-2004]: https://github.com/shimataro/ssh-key-action/workflows/Ubuntu%2020.04/badge.svg?event=push&branch=v2
-[link-verify-ubuntu-2004]: https://github.com/shimataro/ssh-key-action/actions?query=workflow%3A%22Ubuntu+20.04%22
-[image-verify-ubuntu-1804]: https://github.com/shimataro/ssh-key-action/workflows/Ubuntu%2018.04/badge.svg?event=push&branch=v2
-[link-verify-ubuntu-1804]: https://github.com/shimataro/ssh-key-action/actions?query=workflow%3A%22Ubuntu+18.04%22
-[image-verify-ubuntu-1604]: https://github.com/shimataro/ssh-key-action/workflows/Ubuntu%2016.04/badge.svg?event=push&branch=v2
-[link-verify-ubuntu-1604]: https://github.com/shimataro/ssh-key-action/actions?query=workflow%3A%22Ubuntu+16.04%22
+[link-build]: https://github.com/shimataro/ssh-key-action/actions/workflows/build.yml
+[image-verify-windows]: https://github.com/shimataro/ssh-key-action/workflows/Windows/badge.svg?event=push&branch=v2
+[link-verify-windows]: https://github.com/shimataro/ssh-key-action/actions/workflows/verify-on-windows.yml
+[image-verify-macos]: https://github.com/shimataro/ssh-key-action/workflows/macOS/badge.svg?event=push&branch=v2
+[link-verify-macos]: https://github.com/shimataro/ssh-key-action/actions/workflows/verify-on-macos.yml
+[image-verify-ubuntu]: https://github.com/shimataro/ssh-key-action/workflows/Ubuntu/badge.svg?event=push&branch=v2
+[link-verify-ubuntu]: https://github.com/shimataro/ssh-key-action/actions/workflows/verify-on-ubuntu.yml
+[image-verify-docker-container-ubuntu]: https://github.com/shimataro/ssh-key-action/actions/workflows/verify-on-container-ubuntu.yml/badge.svg?event=push&branch=v2
+[link-verify-docker-container-ubuntu]: https://github.com/shimataro/ssh-key-action/actions/workflows/verify-on-container-ubuntu.yml
+[image-verify-docker-container-centos]: https://github.com/shimataro/ssh-key-action/actions/workflows/verify-on-container-centos.yml/badge.svg?event=push&branch=v2
+[link-verify-docker-container-centos]: https://github.com/shimataro/ssh-key-action/actions/workflows/verify-on-container-centos.yml
+[image-verify-docker-container-alpine]: https://github.com/shimataro/ssh-key-action/actions/workflows/verify-on-container-alpine.yml/badge.svg?event=push&branch=v2
+[link-verify-docker-container-alpine]: https://github.com/shimataro/ssh-key-action/actions/workflows/verify-on-container-alpine.yml
 [image-release]: https://img.shields.io/github/release/shimataro/ssh-key-action.svg
 [link-release]: https://github.com/shimataro/ssh-key-action/releases
 [image-license]: https://img.shields.io/github/license/shimataro/ssh-key-action.svg
--- a/action.yml
+++ b/action.yml
@ -21,6 +21,11 @@ inputs:
    description: "SSH config"
    required: false
    default: ""
+  if_key_exists:
+    description: "replace / ignore / fail"
+    required: false
+    default: "fail"
 runs:
-  using: "node12"
-  main: "lib/main.js"
+  using: "node20"
+  main: "./dist/main.js"
+  post: "./dist/post.js"
--- a/dist/main.js
+++ b/dist/main.js
--- a/dist/main.js.map
+++ b/dist/main.js.map
--- a/dist/post.js
+++ b/dist/post.js
--- a/dist/post.js.map
+++ b/dist/post.js.map
--- a/lib/main.js
+++ b/lib/main.js
@ -1,125 +0,0 @@
-"use strict";
-var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
-    if (k2 === undefined) k2 = k;
-    Object.defineProperty(o, k2, { enumerable: true, get: function() { return m[k]; } });
-}) : (function(o, m, k, k2) {
-    if (k2 === undefined) k2 = k;
-    o[k2] = m[k];
-}));
-var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
-    Object.defineProperty(o, "default", { enumerable: true, value: v });
-}) : function(o, v) {
-    o["default"] = v;
-});
-var __importStar = (this && this.__importStar) || function (mod) {
-    if (mod && mod.__esModule) return mod;
-    var result = {};
-    if (mod != null) for (var k in mod) if (k !== "default" && Object.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
-    __setModuleDefault(result, mod);
-    return result;
-};
-var __importDefault = (this && this.__importDefault) || function (mod) {
-    return (mod && mod.__esModule) ? mod : { "default": mod };
-};
-Object.defineProperty(exports, "__esModule", { value: true });
-const fs_1 = __importDefault(require("fs"));
-const path_1 = __importDefault(require("path"));
-const core = __importStar(require("@actions/core"));
-/**
- * main function
- */
-function main() {
-    try {
-        const files = [
-            {
-                name: core.getInput("name"),
-                contents: core.getInput("key", {
-                    required: true,
-                }),
-                options: {
-                    mode: 0o400,
-                    flag: "ax",
-                },
-            },
-            {
-                name: "known_hosts",
-                contents: insertLf(core.getInput("known_hosts", {
-                    required: true,
-                })),
-                options: {
-                    mode: 0o644,
-                    flag: "a",
-                },
-            },
-            {
-                name: "config",
-                contents: insertLf(core.getInput("config")),
-                options: {
-                    mode: 0o644,
-                    flag: "a",
-                },
-            },
-        ];
-        // create ".ssh" directory
-        const home = getHomeDirectory();
-        const dirName = path_1.default.resolve(home, ".ssh");
-        fs_1.default.mkdirSync(dirName, {
-            recursive: true,
-            mode: 0o700,
-        });
-        // create files
-        for (const file of files) {
-            const fileName = path_1.default.join(dirName, file.name);
-            fs_1.default.writeFileSync(fileName, file.contents, file.options);
-        }
-        console.log(`SSH key has been stored to ${dirName} successfully.`);
-    }
-    catch (err) {
-        core.setFailed(err.message);
-    }
-}
-/**
- * get home directory
- * @returns home directory
- */
-function getHomeDirectory() {
-    const homeEnv = getHomeEnv();
-    const home = process.env[homeEnv];
-    if (home === undefined) {
-        throw Error(`${homeEnv} is not defined`);
-    }
-    return home;
-}
-/**
- * get HOME environment name
- * @returns HOME environment name
- */
-function getHomeEnv() {
-    if (process.platform === "win32") {
-        // Windows
-        return "USERPROFILE";
-    }
-    // macOS / Linux
-    return "HOME";
-}
-/**
- * prepend/append LF to value if not empty
- * @param value the value to prepend LF
- * @returns prepended value
- */
-function insertLf(value) {
-    let affectedValue = value;
-    if (value.length === 0) {
-        // do nothing if empty
-        return "";
-    }
-    if (!affectedValue.startsWith("\n")) {
-        affectedValue = `\n${affectedValue}`;
-    }
-    if (!affectedValue.endsWith("\n")) {
-        affectedValue = `${affectedValue}\n`;
-    }
-    return affectedValue;
-}
-main();
-//# sourceMappingURL=main.js.map
--- a/lib/main.js.map
+++ b/lib/main.js.map
@ -1 +0,0 @@
-{"version":3,"file":"main.js","sourceRoot":"","sources":["../src/main.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;AAAA,4CAAoB;AACpB,gDAAwB;AAExB,oDAAsC;AAStC;;GAEG;AACH,SAAS,IAAI;IAEZ,IACA;QACC,MAAM,KAAK,GAAe;YACzB;gBACC,IAAI,EAAE,IAAI,CAAC,QAAQ,CAAC,MAAM,CAAC;gBAC3B,QAAQ,EAAE,IAAI,CAAC,QAAQ,CAAC,KAAK,EAAE;oBAC9B,QAAQ,EAAE,IAAI;iBACd,CAAC;gBACF,OAAO,EAAE;oBACR,IAAI,EAAE,KAAK;oBACX,IAAI,EAAE,IAAI;iBACV;aACD;YACD;gBACC,IAAI,EAAE,aAAa;gBACnB,QAAQ,EAAE,QAAQ,CAAC,IAAI,CAAC,QAAQ,CAAC,aAAa,EAAE;oBAC/C,QAAQ,EAAE,IAAI;iBACd,CAAC,CAAC;gBACH,OAAO,EAAE;oBACR,IAAI,EAAE,KAAK;oBACX,IAAI,EAAE,GAAG;iBACT;aACD;YACD;gBACC,IAAI,EAAE,QAAQ;gBACd,QAAQ,EAAE,QAAQ,CAAC,IAAI,CAAC,QAAQ,CAAC,QAAQ,CAAC,CAAC;gBAC3C,OAAO,EAAE;oBACR,IAAI,EAAE,KAAK;oBACX,IAAI,EAAE,GAAG;iBACT;aACD;SACD,CAAC;QAEF,0BAA0B;QAC1B,MAAM,IAAI,GAAG,gBAAgB,EAAE,CAAC;QAChC,MAAM,OAAO,GAAG,cAAI,CAAC,OAAO,CAAC,IAAI,EAAE,MAAM,CAAC,CAAC;QAC3C,YAAE,CAAC,SAAS,CAAC,OAAO,EAAE;YACrB,SAAS,EAAE,IAAI;YACf,IAAI,EAAE,KAAK;SACX,CAAC,CAAC;QAEH,eAAe;QACf,KAAI,MAAM,IAAI,IAAI,KAAK,EACvB;YACC,MAAM,QAAQ,GAAG,cAAI,CAAC,IAAI,CAAC,OAAO,EAAE,IAAI,CAAC,IAAI,CAAC,CAAC;YAC/C,YAAE,CAAC,aAAa,CAAC,QAAQ,EAAE,IAAI,CAAC,QAAQ,EAAE,IAAI,CAAC,OAAO,CAAC,CAAC;SACxD;QAED,OAAO,CAAC,GAAG,CAAC,8BAA8B,OAAO,gBAAgB,CAAC,CAAC;KACnE;IACD,OAAM,GAAG,EACT;QACC,IAAI,CAAC,SAAS,CAAC,GAAG,CAAC,OAAO,CAAC,CAAC;KAC5B;AACF,CAAC;AAED;;;GAGG;AACH,SAAS,gBAAgB;IAExB,MAAM,OAAO,GAAG,UAAU,EAAE,CAAC;IAC7B,MAAM,IAAI,GAAG,OAAO,CAAC,GAAG,CAAC,OAAO,CAAC,CAAC;IAClC,IAAG,IAAI,KAAK,SAAS,EACrB;QACC,MAAM,KAAK,CAAC,GAAG,OAAO,iBAAiB,CAAC,CAAC;KACzC;IAED,OAAO,IAAI,CAAC;AACb,CAAC;AAED;;;GAGG;AACH,SAAS,UAAU;IAElB,IAAG,OAAO,CAAC,QAAQ,KAAK,OAAO,EAC/B;QACC,UAAU;QACV,OAAO,aAAa,CAAC;KACrB;IAED,gBAAgB;IAChB,OAAO,MAAM,CAAC;AACf,CAAC;AAED;;;;GAIG;AACH,SAAS,QAAQ,CAAC,KAAa;IAE9B,IAAI,aAAa,GAAG,KAAK,CAAC;IAE1B,IAAG,KAAK,CAAC,MAAM,KAAK,CAAC,EACrB;QACC,sBAAsB;QACtB,OAAO,EAAE,CAAC;KACV;IACD,IAAG,CAAC,aAAa,CAAC,UAAU,CAAC,IAAI,CAAC,EAClC;QACC,aAAa,GAAG,KAAK,aAAa,EAAE,CAAC;KACrC;IACD,IAAG,CAAC,aAAa,CAAC,QAAQ,CAAC,IAAI,CAAC,EAChC;QACC,aAAa,GAAG,GAAG,aAAa,IAAI,CAAC;KACrC;IAED,OAAO,aAAa,CAAC;AACtB,CAAC;AAED,IAAI,EAAE,CAAC"}
--- a/node_modules/@actions/core/README.md
+++ b/node_modules/@actions/core/README.md
@ -1,146 +0,0 @@
-# `@actions/core`
-
-> Core functions for setting results, logging, registering secrets and exporting variables across actions
-
-## Usage
-
-### Import the package
-
-```js
-// javascript
-const core = require('@actions/core');
-
-// typescript
-import * as core from '@actions/core';
-```
-
-#### Inputs/Outputs
-
-Action inputs can be read with `getInput`.  Outputs can be set with `setOutput` which makes them available to be mapped into inputs of other actions to ensure they are decoupled.
-
-```js
-const myInput = core.getInput('inputName', { required: true });
-
-core.setOutput('outputKey', 'outputVal');
-```
-
-#### Exporting variables
-
-Since each step runs in a separate process, you can use `exportVariable` to add it to this step and future steps environment blocks.
-
-```js
-core.exportVariable('envVar', 'Val');
-```
-
-#### Setting a secret
-
-Setting a secret registers the secret with the runner to ensure it is masked in logs.
-
-```js
-core.setSecret('myPassword');
-```
-
-#### PATH Manipulation
-
-To make a tool's path available in the path for the remainder of the job (without altering the machine or containers state), use `addPath`.  The runner will prepend the path given to the jobs PATH.
-
-```js
-core.addPath('/path/to/mytool');
-```
-
-#### Exit codes
-
-You should use this library to set the failing exit code for your action.  If status is not set and the script runs to completion, that will lead to a success.
-
-```js
-const core = require('@actions/core');
-
-try {
-  // Do stuff
-}
-catch (err) {
-  // setFailed logs the message and sets a failing exit code
-  core.setFailed(`Action failed with error ${err}`);
-}
-
-Note that `setNeutral` is not yet implemented in actions V2 but equivalent functionality is being planned.
-
-```
-
-#### Logging
-
-Finally, this library provides some utilities for logging. Note that debug logging is hidden from the logs by default. This behavior can be toggled by enabling the [Step Debug Logs](../../docs/action-debugging.md#step-debug-logs).
-
-```js
-const core = require('@actions/core');
-
-const myInput = core.getInput('input');
-try {
-  core.debug('Inside try block');
-  
-  if (!myInput) {
-    core.warning('myInput was not set');
-  }
-  
-  if (core.isDebug()) {
-    // curl -v https://github.com
-  } else {
-    // curl https://github.com
-  }
-
-  // Do stuff
-}
-catch (err) {
-  core.error(`Error ${err}, action may still succeed though`);
-}
-```
-
-This library can also wrap chunks of output in foldable groups.
-
-```js
-const core = require('@actions/core')
-
-// Manually wrap output
-core.startGroup('Do some function')
-doSomeFunction()
-core.endGroup()
-
-// Wrap an asynchronous function call
-const result = await core.group('Do something async', async () => {
-  const response = await doSomeHTTPRequest()
-  return response
-})
-```
-
-#### Action state
-
-You can use this library to save state and get state for sharing information between a given wrapper action: 
-
-**action.yml**
-```yaml
-name: 'Wrapper action sample'
-inputs:
-  name:
-    default: 'GitHub'
-runs:
-  using: 'node12'
-  main: 'main.js'
-  post: 'cleanup.js'
-```
-
-In action's `main.js`:
-
-```js
-const core = require('@actions/core');
-
-core.saveState("pidToKill", 12345);
-```
-
-In action's `cleanup.js`:
-```js
-const core = require('@actions/core');
-
-var pid = core.getState("pidToKill");
-
-process.kill(pid);
-```
--- a/node_modules/@actions/core/lib/command.d.ts
+++ b/node_modules/@actions/core/lib/command.d.ts
@ -1,21 +0,0 @@
-interface CommandProperties {
-    [key: string]: any;
-}
-/**
- * Commands
- *
- * Command Format:
- *   ::name key=value,key=value::message
- *
- * Examples:
- *   ::warning::This is the message
- *   ::set-env name=MY_VAR::some value
- */
-export declare function issueCommand(command: string, properties: CommandProperties, message: any): void;
-export declare function issue(name: string, message?: string): void;
-/**
- * Sanitizes an input into a string so it can be passed into issueCommand safely
- * @param input input to sanitize into a string
- */
-export declare function toCommandValue(input: any): string;
-export {};
--- a/node_modules/@actions/core/lib/command.js
+++ b/node_modules/@actions/core/lib/command.js
@ -1,92 +0,0 @@
-"use strict";
-var __importStar = (this && this.__importStar) || function (mod) {
-    if (mod && mod.__esModule) return mod;
-    var result = {};
-    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
-    result["default"] = mod;
-    return result;
-};
-Object.defineProperty(exports, "__esModule", { value: true });
-const os = __importStar(require("os"));
-/**
- * Commands
- *
- * Command Format:
- *   ::name key=value,key=value::message
- *
- * Examples:
- *   ::warning::This is the message
- *   ::set-env name=MY_VAR::some value
- */
-function issueCommand(command, properties, message) {
-    const cmd = new Command(command, properties, message);
-    process.stdout.write(cmd.toString() + os.EOL);
-}
-exports.issueCommand = issueCommand;
-function issue(name, message = '') {
-    issueCommand(name, {}, message);
-}
-exports.issue = issue;
-const CMD_STRING = '::';
-class Command {
-    constructor(command, properties, message) {
-        if (!command) {
-            command = 'missing.command';
-        }
-        this.command = command;
-        this.properties = properties;
-        this.message = message;
-    }
-    toString() {
-        let cmdStr = CMD_STRING + this.command;
-        if (this.properties && Object.keys(this.properties).length > 0) {
-            cmdStr += ' ';
-            let first = true;
-            for (const key in this.properties) {
-                if (this.properties.hasOwnProperty(key)) {
-                    const val = this.properties[key];
-                    if (val) {
-                        if (first) {
-                            first = false;
-                        }
-                        else {
-                            cmdStr += ',';
-                        }
-                        cmdStr += `${key}=${escapeProperty(val)}`;
-                    }
-                }
-            }
-        }
-        cmdStr += `${CMD_STRING}${escapeData(this.message)}`;
-        return cmdStr;
-    }
-}
-/**
- * Sanitizes an input into a string so it can be passed into issueCommand safely
- * @param input input to sanitize into a string
- */
-function toCommandValue(input) {
-    if (input === null || input === undefined) {
-        return '';
-    }
-    else if (typeof input === 'string' || input instanceof String) {
-        return input;
-    }
-    return JSON.stringify(input);
-}
-exports.toCommandValue = toCommandValue;
-function escapeData(s) {
-    return toCommandValue(s)
-        .replace(/%/g, '%25')
-        .replace(/\r/g, '%0D')
-        .replace(/\n/g, '%0A');
-}
-function escapeProperty(s) {
-    return toCommandValue(s)
-        .replace(/%/g, '%25')
-        .replace(/\r/g, '%0D')
-        .replace(/\n/g, '%0A')
-        .replace(/:/g, '%3A')
-        .replace(/,/g, '%2C');
-}
-//# sourceMappingURL=command.js.map
--- a/node_modules/@actions/core/lib/command.js.map
+++ b/node_modules/@actions/core/lib/command.js.map
@ -1 +0,0 @@
-{"version":3,"file":"command.js","sourceRoot":"","sources":["../src/command.ts"],"names":[],"mappings":";;;;;;;;;AAAA,uCAAwB;AAWxB;;;;;;;;;GASG;AACH,SAAgB,YAAY,CAC1B,OAAe,EACf,UAA6B,EAC7B,OAAY;IAEZ,MAAM,GAAG,GAAG,IAAI,OAAO,CAAC,OAAO,EAAE,UAAU,EAAE,OAAO,CAAC,CAAA;IACrD,OAAO,CAAC,MAAM,CAAC,KAAK,CAAC,GAAG,CAAC,QAAQ,EAAE,GAAG,EAAE,CAAC,GAAG,CAAC,CAAA;AAC/C,CAAC;AAPD,oCAOC;AAED,SAAgB,KAAK,CAAC,IAAY,EAAE,UAAkB,EAAE;IACtD,YAAY,CAAC,IAAI,EAAE,EAAE,EAAE,OAAO,CAAC,CAAA;AACjC,CAAC;AAFD,sBAEC;AAED,MAAM,UAAU,GAAG,IAAI,CAAA;AAEvB,MAAM,OAAO;IAKX,YAAY,OAAe,EAAE,UAA6B,EAAE,OAAe;QACzE,IAAI,CAAC,OAAO,EAAE;YACZ,OAAO,GAAG,iBAAiB,CAAA;SAC5B;QAED,IAAI,CAAC,OAAO,GAAG,OAAO,CAAA;QACtB,IAAI,CAAC,UAAU,GAAG,UAAU,CAAA;QAC5B,IAAI,CAAC,OAAO,GAAG,OAAO,CAAA;IACxB,CAAC;IAED,QAAQ;QACN,IAAI,MAAM,GAAG,UAAU,GAAG,IAAI,CAAC,OAAO,CAAA;QAEtC,IAAI,IAAI,CAAC,UAAU,IAAI,MAAM,CAAC,IAAI,CAAC,IAAI,CAAC,UAAU,CAAC,CAAC,MAAM,GAAG,CAAC,EAAE;YAC9D,MAAM,IAAI,GAAG,CAAA;YACb,IAAI,KAAK,GAAG,IAAI,CAAA;YAChB,KAAK,MAAM,GAAG,IAAI,IAAI,CAAC,UAAU,EAAE;gBACjC,IAAI,IAAI,CAAC,UAAU,CAAC,cAAc,CAAC,GAAG,CAAC,EAAE;oBACvC,MAAM,GAAG,GAAG,IAAI,CAAC,UAAU,CAAC,GAAG,CAAC,CAAA;oBAChC,IAAI,GAAG,EAAE;wBACP,IAAI,KAAK,EAAE;4BACT,KAAK,GAAG,KAAK,CAAA;yBACd;6BAAM;4BACL,MAAM,IAAI,GAAG,CAAA;yBACd;wBAED,MAAM,IAAI,GAAG,GAAG,IAAI,cAAc,CAAC,GAAG,CAAC,EAAE,CAAA;qBAC1C;iBACF;aACF;SACF;QAED,MAAM,IAAI,GAAG,UAAU,GAAG,UAAU,CAAC,IAAI,CAAC,OAAO,CAAC,EAAE,CAAA;QACpD,OAAO,MAAM,CAAA;IACf,CAAC;CACF;AAED;;;GAGG;AACH,SAAgB,cAAc,CAAC,KAAU;IACvC,IAAI,KAAK,KAAK,IAAI,IAAI,KAAK,KAAK,SAAS,EAAE;QACzC,OAAO,EAAE,CAAA;KACV;SAAM,IAAI,OAAO,KAAK,KAAK,QAAQ,IAAI,KAAK,YAAY,MAAM,EAAE;QAC/D,OAAO,KAAe,CAAA;KACvB;IACD,OAAO,IAAI,CAAC,SAAS,CAAC,KAAK,CAAC,CAAA;AAC9B,CAAC;AAPD,wCAOC;AAED,SAAS,UAAU,CAAC,CAAM;IACxB,OAAO,cAAc,CAAC,CAAC,CAAC;SACrB,OAAO,CAAC,IAAI,EAAE,KAAK,CAAC;SACpB,OAAO,CAAC,KAAK,EAAE,KAAK,CAAC;SACrB,OAAO,CAAC,KAAK,EAAE,KAAK,CAAC,CAAA;AAC1B,CAAC;AAED,SAAS,cAAc,CAAC,CAAM;IAC5B,OAAO,cAAc,CAAC,CAAC,CAAC;SACrB,OAAO,CAAC,IAAI,EAAE,KAAK,CAAC;SACpB,OAAO,CAAC,KAAK,EAAE,KAAK,CAAC;SACrB,OAAO,CAAC,KAAK,EAAE,KAAK,CAAC;SACrB,OAAO,CAAC,IAAI,EAAE,KAAK,CAAC;SACpB,OAAO,CAAC,IAAI,EAAE,KAAK,CAAC,CAAA;AACzB,CAAC"}
--- a/node_modules/@actions/core/lib/core.d.ts
+++ b/node_modules/@actions/core/lib/core.d.ts
@ -1,122 +0,0 @@
-/**
- * Interface for getInput options
- */
-export interface InputOptions {
-    /** Optional. Whether the input is required. If required and not present, will throw. Defaults to false */
-    required?: boolean;
-}
-/**
- * The code to exit an action
- */
-export declare enum ExitCode {
-    /**
-     * A code indicating that the action was successful
-     */
-    Success = 0,
-    /**
-     * A code indicating that the action was a failure
-     */
-    Failure = 1
-}
-/**
- * Sets env variable for this action and future actions in the job
- * @param name the name of the variable to set
- * @param val the value of the variable. Non-string values will be converted to a string via JSON.stringify
- */
-export declare function exportVariable(name: string, val: any): void;
-/**
- * Registers a secret which will get masked from logs
- * @param secret value of the secret
- */
-export declare function setSecret(secret: string): void;
-/**
- * Prepends inputPath to the PATH (for this action and future actions)
- * @param inputPath
- */
-export declare function addPath(inputPath: string): void;
-/**
- * Gets the value of an input.  The value is also trimmed.
- *
- * @param     name     name of the input to get
- * @param     options  optional. See InputOptions.
- * @returns   string
- */
-export declare function getInput(name: string, options?: InputOptions): string;
-/**
- * Sets the value of an output.
- *
- * @param     name     name of the output to set
- * @param     value    value to store. Non-string values will be converted to a string via JSON.stringify
- */
-export declare function setOutput(name: string, value: any): void;
-/**
- * Enables or disables the echoing of commands into stdout for the rest of the step.
- * Echoing is disabled by default if ACTIONS_STEP_DEBUG is not set.
- *
- */
-export declare function setCommandEcho(enabled: boolean): void;
-/**
- * Sets the action status to failed.
- * When the action exits it will be with an exit code of 1
- * @param message add error issue message
- */
-export declare function setFailed(message: string | Error): void;
-/**
- * Gets whether Actions Step Debug is on or not
- */
-export declare function isDebug(): boolean;
-/**
- * Writes debug message to user log
- * @param message debug message
- */
-export declare function debug(message: string): void;
-/**
- * Adds an error issue
- * @param message error issue message. Errors will be converted to string via toString()
- */
-export declare function error(message: string | Error): void;
-/**
- * Adds an warning issue
- * @param message warning issue message. Errors will be converted to string via toString()
- */
-export declare function warning(message: string | Error): void;
-/**
- * Writes info to log with console.log.
- * @param message info message
- */
-export declare function info(message: string): void;
-/**
- * Begin an output group.
- *
- * Output until the next `groupEnd` will be foldable in this group
- *
- * @param name The name of the output group
- */
-export declare function startGroup(name: string): void;
-/**
- * End an output group.
- */
-export declare function endGroup(): void;
-/**
- * Wrap an asynchronous function call in a group.
- *
- * Returns the same type as the function itself.
- *
- * @param name The name of the group
- * @param fn The function to wrap in the group
- */
-export declare function group<T>(name: string, fn: () => Promise<T>): Promise<T>;
-/**
- * Saves state for current action, the state can only be retrieved by this action's post job execution.
- *
- * @param     name     name of the state to store
- * @param     value    value to store. Non-string values will be converted to a string via JSON.stringify
- */
-export declare function saveState(name: string, value: any): void;
-/**
- * Gets the value of an state set by this action's main execution.
- *
- * @param     name     name of the state to get
- * @returns   string
- */
-export declare function getState(name: string): string;
--- a/node_modules/@actions/core/lib/core.js
+++ b/node_modules/@actions/core/lib/core.js
@ -1,222 +0,0 @@
-"use strict";
-var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
-    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
-    return new (P || (P = Promise))(function (resolve, reject) {
-        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
-        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
-        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments || [])).next());
-    });
-};
-var __importStar = (this && this.__importStar) || function (mod) {
-    if (mod && mod.__esModule) return mod;
-    var result = {};
-    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
-    result["default"] = mod;
-    return result;
-};
-Object.defineProperty(exports, "__esModule", { value: true });
-const command_1 = require("./command");
-const os = __importStar(require("os"));
-const path = __importStar(require("path"));
-/**
- * The code to exit an action
- */
-var ExitCode;
-(function (ExitCode) {
-    /**
-     * A code indicating that the action was successful
-     */
-    ExitCode[ExitCode["Success"] = 0] = "Success";
-    /**
-     * A code indicating that the action was a failure
-     */
-    ExitCode[ExitCode["Failure"] = 1] = "Failure";
-})(ExitCode = exports.ExitCode || (exports.ExitCode = {}));
-//-----------------------------------------------------------------------
-// Variables
-//-----------------------------------------------------------------------
-/**
- * Sets env variable for this action and future actions in the job
- * @param name the name of the variable to set
- * @param val the value of the variable. Non-string values will be converted to a string via JSON.stringify
- */
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-function exportVariable(name, val) {
-    const convertedVal = command_1.toCommandValue(val);
-    process.env[name] = convertedVal;
-    command_1.issueCommand('set-env', { name }, convertedVal);
-}
-exports.exportVariable = exportVariable;
-/**
- * Registers a secret which will get masked from logs
- * @param secret value of the secret
- */
-function setSecret(secret) {
-    command_1.issueCommand('add-mask', {}, secret);
-}
-exports.setSecret = setSecret;
-/**
- * Prepends inputPath to the PATH (for this action and future actions)
- * @param inputPath
- */
-function addPath(inputPath) {
-    command_1.issueCommand('add-path', {}, inputPath);
-    process.env['PATH'] = `${inputPath}${path.delimiter}${process.env['PATH']}`;
-}
-exports.addPath = addPath;
-/**
- * Gets the value of an input.  The value is also trimmed.
- *
- * @param     name     name of the input to get
- * @param     options  optional. See InputOptions.
- * @returns   string
- */
-function getInput(name, options) {
-    const val = process.env[`INPUT_${name.replace(/ /g, '_').toUpperCase()}`] || '';
-    if (options && options.required && !val) {
-        throw new Error(`Input required and not supplied: ${name}`);
-    }
-    return val.trim();
-}
-exports.getInput = getInput;
-/**
- * Sets the value of an output.
- *
- * @param     name     name of the output to set
- * @param     value    value to store. Non-string values will be converted to a string via JSON.stringify
- */
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-function setOutput(name, value) {
-    command_1.issueCommand('set-output', { name }, value);
-}
-exports.setOutput = setOutput;
-/**
- * Enables or disables the echoing of commands into stdout for the rest of the step.
- * Echoing is disabled by default if ACTIONS_STEP_DEBUG is not set.
- *
- */
-function setCommandEcho(enabled) {
-    command_1.issue('echo', enabled ? 'on' : 'off');
-}
-exports.setCommandEcho = setCommandEcho;
-//-----------------------------------------------------------------------
-// Results
-//-----------------------------------------------------------------------
-/**
- * Sets the action status to failed.
- * When the action exits it will be with an exit code of 1
- * @param message add error issue message
- */
-function setFailed(message) {
-    process.exitCode = ExitCode.Failure;
-    error(message);
-}
-exports.setFailed = setFailed;
-//-----------------------------------------------------------------------
-// Logging Commands
-//-----------------------------------------------------------------------
-/**
- * Gets whether Actions Step Debug is on or not
- */
-function isDebug() {
-    return process.env['RUNNER_DEBUG'] === '1';
-}
-exports.isDebug = isDebug;
-/**
- * Writes debug message to user log
- * @param message debug message
- */
-function debug(message) {
-    command_1.issueCommand('debug', {}, message);
-}
-exports.debug = debug;
-/**
- * Adds an error issue
- * @param message error issue message. Errors will be converted to string via toString()
- */
-function error(message) {
-    command_1.issue('error', message instanceof Error ? message.toString() : message);
-}
-exports.error = error;
-/**
- * Adds an warning issue
- * @param message warning issue message. Errors will be converted to string via toString()
- */
-function warning(message) {
-    command_1.issue('warning', message instanceof Error ? message.toString() : message);
-}
-exports.warning = warning;
-/**
- * Writes info to log with console.log.
- * @param message info message
- */
-function info(message) {
-    process.stdout.write(message + os.EOL);
-}
-exports.info = info;
-/**
- * Begin an output group.
- *
- * Output until the next `groupEnd` will be foldable in this group
- *
- * @param name The name of the output group
- */
-function startGroup(name) {
-    command_1.issue('group', name);
-}
-exports.startGroup = startGroup;
-/**
- * End an output group.
- */
-function endGroup() {
-    command_1.issue('endgroup');
-}
-exports.endGroup = endGroup;
-/**
- * Wrap an asynchronous function call in a group.
- *
- * Returns the same type as the function itself.
- *
- * @param name The name of the group
- * @param fn The function to wrap in the group
- */
-function group(name, fn) {
-    return __awaiter(this, void 0, void 0, function* () {
-        startGroup(name);
-        let result;
-        try {
-            result = yield fn();
-        }
-        finally {
-            endGroup();
-        }
-        return result;
-    });
-}
-exports.group = group;
-//-----------------------------------------------------------------------
-// Wrapper action state
-//-----------------------------------------------------------------------
-/**
- * Saves state for current action, the state can only be retrieved by this action's post job execution.
- *
- * @param     name     name of the state to store
- * @param     value    value to store. Non-string values will be converted to a string via JSON.stringify
- */
-// eslint-disable-next-line @typescript-eslint/no-explicit-any
-function saveState(name, value) {
-    command_1.issueCommand('save-state', { name }, value);
-}
-exports.saveState = saveState;
-/**
- * Gets the value of an state set by this action's main execution.
- *
- * @param     name     name of the state to get
- * @returns   string
- */
-function getState(name) {
-    return process.env[`STATE_${name}`] || '';
-}
-exports.getState = getState;
-//# sourceMappingURL=core.js.map
--- a/node_modules/@actions/core/lib/core.js.map
+++ b/node_modules/@actions/core/lib/core.js.map
@ -1 +0,0 @@
-{"version":3,"file":"core.js","sourceRoot":"","sources":["../src/core.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;AAAA,uCAA6D;AAE7D,uCAAwB;AACxB,2CAA4B;AAU5B;;GAEG;AACH,IAAY,QAUX;AAVD,WAAY,QAAQ;IAClB;;OAEG;IACH,6CAAW,CAAA;IAEX;;OAEG;IACH,6CAAW,CAAA;AACb,CAAC,EAVW,QAAQ,GAAR,gBAAQ,KAAR,gBAAQ,QAUnB;AAED,yEAAyE;AACzE,YAAY;AACZ,yEAAyE;AAEzE;;;;GAIG;AACH,8DAA8D;AAC9D,SAAgB,cAAc,CAAC,IAAY,EAAE,GAAQ;IACnD,MAAM,YAAY,GAAG,wBAAc,CAAC,GAAG,CAAC,CAAA;IACxC,OAAO,CAAC,GAAG,CAAC,IAAI,CAAC,GAAG,YAAY,CAAA;IAChC,sBAAY,CAAC,SAAS,EAAE,EAAC,IAAI,EAAC,EAAE,YAAY,CAAC,CAAA;AAC/C,CAAC;AAJD,wCAIC;AAED;;;GAGG;AACH,SAAgB,SAAS,CAAC,MAAc;IACtC,sBAAY,CAAC,UAAU,EAAE,EAAE,EAAE,MAAM,CAAC,CAAA;AACtC,CAAC;AAFD,8BAEC;AAED;;;GAGG;AACH,SAAgB,OAAO,CAAC,SAAiB;IACvC,sBAAY,CAAC,UAAU,EAAE,EAAE,EAAE,SAAS,CAAC,CAAA;IACvC,OAAO,CAAC,GAAG,CAAC,MAAM,CAAC,GAAG,GAAG,SAAS,GAAG,IAAI,CAAC,SAAS,GAAG,OAAO,CAAC,GAAG,CAAC,MAAM,CAAC,EAAE,CAAA;AAC7E,CAAC;AAHD,0BAGC;AAED;;;;;;GAMG;AACH,SAAgB,QAAQ,CAAC,IAAY,EAAE,OAAsB;IAC3D,MAAM,GAAG,GACP,OAAO,CAAC,GAAG,CAAC,SAAS,IAAI,CAAC,OAAO,CAAC,IAAI,EAAE,GAAG,CAAC,CAAC,WAAW,EAAE,EAAE,CAAC,IAAI,EAAE,CAAA;IACrE,IAAI,OAAO,IAAI,OAAO,CAAC,QAAQ,IAAI,CAAC,GAAG,EAAE;QACvC,MAAM,IAAI,KAAK,CAAC,oCAAoC,IAAI,EAAE,CAAC,CAAA;KAC5D;IAED,OAAO,GAAG,CAAC,IAAI,EAAE,CAAA;AACnB,CAAC;AARD,4BAQC;AAED;;;;;GAKG;AACH,8DAA8D;AAC9D,SAAgB,SAAS,CAAC,IAAY,EAAE,KAAU;IAChD,sBAAY,CAAC,YAAY,EAAE,EAAC,IAAI,EAAC,EAAE,KAAK,CAAC,CAAA;AAC3C,CAAC;AAFD,8BAEC;AAED;;;;GAIG;AACH,SAAgB,cAAc,CAAC,OAAgB;IAC7C,eAAK,CAAC,MAAM,EAAE,OAAO,CAAC,CAAC,CAAC,IAAI,CAAC,CAAC,CAAC,KAAK,CAAC,CAAA;AACvC,CAAC;AAFD,wCAEC;AAED,yEAAyE;AACzE,UAAU;AACV,yEAAyE;AAEzE;;;;GAIG;AACH,SAAgB,SAAS,CAAC,OAAuB;IAC/C,OAAO,CAAC,QAAQ,GAAG,QAAQ,CAAC,OAAO,CAAA;IAEnC,KAAK,CAAC,OAAO,CAAC,CAAA;AAChB,CAAC;AAJD,8BAIC;AAED,yEAAyE;AACzE,mBAAmB;AACnB,yEAAyE;AAEzE;;GAEG;AACH,SAAgB,OAAO;IACrB,OAAO,OAAO,CAAC,GAAG,CAAC,cAAc,CAAC,KAAK,GAAG,CAAA;AAC5C,CAAC;AAFD,0BAEC;AAED;;;GAGG;AACH,SAAgB,KAAK,CAAC,OAAe;IACnC,sBAAY,CAAC,OAAO,EAAE,EAAE,EAAE,OAAO,CAAC,CAAA;AACpC,CAAC;AAFD,sBAEC;AAED;;;GAGG;AACH,SAAgB,KAAK,CAAC,OAAuB;IAC3C,eAAK,CAAC,OAAO,EAAE,OAAO,YAAY,KAAK,CAAC,CAAC,CAAC,OAAO,CAAC,QAAQ,EAAE,CAAC,CAAC,CAAC,OAAO,CAAC,CAAA;AACzE,CAAC;AAFD,sBAEC;AAED;;;GAGG;AACH,SAAgB,OAAO,CAAC,OAAuB;IAC7C,eAAK,CAAC,SAAS,EAAE,OAAO,YAAY,KAAK,CAAC,CAAC,CAAC,OAAO,CAAC,QAAQ,EAAE,CAAC,CAAC,CAAC,OAAO,CAAC,CAAA;AAC3E,CAAC;AAFD,0BAEC;AAED;;;GAGG;AACH,SAAgB,IAAI,CAAC,OAAe;IAClC,OAAO,CAAC,MAAM,CAAC,KAAK,CAAC,OAAO,GAAG,EAAE,CAAC,GAAG,CAAC,CAAA;AACxC,CAAC;AAFD,oBAEC;AAED;;;;;;GAMG;AACH,SAAgB,UAAU,CAAC,IAAY;IACrC,eAAK,CAAC,OAAO,EAAE,IAAI,CAAC,CAAA;AACtB,CAAC;AAFD,gCAEC;AAED;;GAEG;AACH,SAAgB,QAAQ;IACtB,eAAK,CAAC,UAAU,CAAC,CAAA;AACnB,CAAC;AAFD,4BAEC;AAED;;;;;;;GAOG;AACH,SAAsB,KAAK,CAAI,IAAY,EAAE,EAAoB;;QAC/D,UAAU,CAAC,IAAI,CAAC,CAAA;QAEhB,IAAI,MAAS,CAAA;QAEb,IAAI;YACF,MAAM,GAAG,MAAM,EAAE,EAAE,CAAA;SACpB;gBAAS;YACR,QAAQ,EAAE,CAAA;SACX;QAED,OAAO,MAAM,CAAA;IACf,CAAC;CAAA;AAZD,sBAYC;AAED,yEAAyE;AACzE,uBAAuB;AACvB,yEAAyE;AAEzE;;;;;GAKG;AACH,8DAA8D;AAC9D,SAAgB,SAAS,CAAC,IAAY,EAAE,KAAU;IAChD,sBAAY,CAAC,YAAY,EAAE,EAAC,IAAI,EAAC,EAAE,KAAK,CAAC,CAAA;AAC3C,CAAC;AAFD,8BAEC;AAED;;;;;GAKG;AACH,SAAgB,QAAQ,CAAC,IAAY;IACnC,OAAO,OAAO,CAAC,GAAG,CAAC,SAAS,IAAI,EAAE,CAAC,IAAI,EAAE,CAAA;AAC3C,CAAC;AAFD,4BAEC"}
--- a/node_modules/@actions/core/package.json
+++ b/node_modules/@actions/core/package.json
@ -1,44 +0,0 @@
-{
-  "name": "@actions/core",
-  "version": "1.2.4",
-  "description": "Actions core lib",
-  "keywords": [
-    "github",
-    "actions",
-    "core"
-  ],
-  "homepage": "https://github.com/actions/toolkit/tree/master/packages/core",
-  "license": "MIT",
-  "main": "lib/core.js",
-  "types": "lib/core.d.ts",
-  "directories": {
-    "lib": "lib",
-    "test": "__tests__"
-  },
-  "files": [
-    "lib"
-  ],
-  "publishConfig": {
-    "access": "public"
-  },
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/actions/toolkit.git",
-    "directory": "packages/core"
-  },
-  "scripts": {
-    "audit-moderate": "npm install && npm audit --audit-level=moderate",
-    "test": "echo \"Error: run tests from root\" && exit 1",
-    "tsc": "tsc"
-  },
-  "bugs": {
-    "url": "https://github.com/actions/toolkit/issues"
-  },
-  "devDependencies": {
-    "@types/node": "^12.0.2"
-  }
-
-,"_resolved": "https://registry.npmjs.org/@actions/core/-/core-1.2.4.tgz"
-,"_integrity": "sha512-YJCEq8BE3CdN8+7HPZ/4DxJjk/OkZV2FFIf+DlZTC/4iBlzYCD5yjRR6eiOS5llO11zbRltIRuKAjMKaWTE6cg=="
-,"_from": "@actions/core@1.2.4"
-}
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@ -1,18 +1,19 @@
 {
  "name": "install-ssh-key",
-  "version": "2.1.0",
+  "version": "2.7.0",
  "private": true,
  "description": "Install SSH key in .ssh",
-  "main": "lib/main.js",
+  "main": "./dist/main.js",
  "engines": {
    "node": ">=8.0.0",
    "npm": ">=5.7.0"
  },
  "scripts": {
-    "build": "tsc",
+    "build": "esbuild ./src/main.ts ./src/post.ts --bundle --platform=node --minify --sourcemap --outdir=./dist",
    "check-updates": "ncu",
    "lint": "run-p lint:*",
-    "lint:ts": "eslint ./src --ext .ts",
+    "lint:es": "eslint ./src --ext .ts",
+    "lint:ts": "tsc --noEmit ./src/main.ts ./src/post.ts",
    "lint:md": "markdownlint . --ignore node_modules --ignore examples",
    "lint:yaml": "yamllint **/{,.}*.{yml,yaml} --ignore=node_modules/**",
    "verify": "run-p lint"
@ -30,18 +31,17 @@
  ],
  "author": "shimataro",
  "license": "MIT",
-  "dependencies": {
-    "@actions/core": "1.2.4"
-  },
  "devDependencies": {
-    "@types/node": "14.0.27",
-    "@typescript-eslint/eslint-plugin": "3.9.0",
-    "@typescript-eslint/parser": "3.9.0",
-    "eslint": "7.7.0",
-    "markdownlint-cli": "0.23.2",
-    "npm-check-updates": "7.1.1",
+    "@actions/core": "1.10.1",
+    "@types/node": "20.11.17",
+    "@typescript-eslint/eslint-plugin": "6.21.0",
+    "@typescript-eslint/parser": "6.21.0",
+    "esbuild": "0.20.0",
+    "eslint": "8.56.0",
+    "markdownlint-cli": "0.39.0",
+    "npm-check-updates": "16.14.15",
    "npm-run-all": "4.1.5",
-    "typescript": "3.9.7",
-    "yaml-lint": "1.2.4"
+    "typescript": "5.3.3",
+    "yaml-lint": "1.7.0"
  }
 }
--- a/scripts/create-release-branch.sh
+++ b/scripts/create-release-branch.sh
@ -1,136 +0,0 @@
-#!/bin/bash
-# requires following packages:
-# - git; I believe you have already installed.
-# - sed; GNU sed is preferred. POSIX sed may not work.
-# - perl; Already installed on most of unix system.
-
-set -e
-
-BASE_BRANCH="develop"
-
-PACKAGE_NAME="ssh-key-action"
-URL_PRODUCT="https://github.com/shimataro/${PACKAGE_NAME}"
-URL_REPOSITORY="${URL_PRODUCT}.git"
-URL_COMPARE="${URL_PRODUCT}/compare"
-URL_RELEASE="${URL_PRODUCT}/releases/new"
-
-COLOR_ERROR="\e[1;41m"
-COLOR_SECTION="\e[1;34m"
-COLOR_COMMAND_NAME="\e[1;34m"
-COLOR_OPTION="\e[4;36m"
-COLOR_COMMAND="\e[4m"
-COLOR_FILE="\e[1;34m"
-COLOR_BRANCH="\e[1;31m"
-COLOR_INPUT="\e[1;31m"
-COLOR_SELECT="\e[1;32m"
-COLOR_RESET="\e[m"
-
-function main() {
-	cd $(dirname ${0})/..
-
-	if [ $# -lt 1 ]; then
-		usage
-	fi
-
-	local VERSION=$1
-	local BRANCH="release/v${VERSION}"
-	local TAG="v${VERSION}"
-
-	check_version_format ${VERSION}
-	check_current_branch
-
-	create_branch ${BRANCH}
-	./scripts/prepare-release.sh ${VERSION}
-	finish ${VERSION} ${BRANCH} ${TAG}
-}
-
-function usage() {
-	local COMMAND=`basename ${0}`
-
-	echo -e "${COLOR_SECTION}NAME${COLOR_RESET}
-	${COMMAND} - Create a branch and prepare for new release
-
-${COLOR_SECTION}SYNOPSIS${COLOR_RESET}
-	${COLOR_COMMAND_NAME}${COMMAND}${COLOR_RESET} <${COLOR_OPTION}new-version${COLOR_RESET}>
-
-${COLOR_SECTION}DESCRIPTION${COLOR_RESET}
-	This command:
-	- creates a new branch for release
-	- updates ${COLOR_FILE}CHANGELOG.md${COLOR_RESET}
-	- updates package version in ${COLOR_FILE}package.json${COLOR_RESET}
-	- updates dependencies version in ${COLOR_FILE}package.json${COLOR_RESET}
-	- verifies
-	- ...and commits!
-
-	${COLOR_OPTION}new-version${COLOR_RESET} must follow \"Semantic Versioning\" <https://semver.org/>.
-"
-	exit 1
-}
-
-function check_version_format() {
-	if [[ $1 =~ ^[0-9]+\.[0-9]+\.[0-9]+ ]]; then
-		return
-	fi
-
-	echo -e "${COLOR_ERROR}ERROR:${COLOR_RESET} Follow \"Semantic Versioning\" <https://semver.org/> for new version.
-" >&2
-	exit 2
-}
-
-function check_current_branch() {
-	local CURRENT_BRANCH=`git rev-parse --abbrev-ref HEAD`
-	if [ ${CURRENT_BRANCH} = ${BASE_BRANCH} ]; then
-		return
-	fi
-
-	echo -e "${COLOR_ERROR}ERROR:${COLOR_RESET} Work on ${COLOR_BRANCH}${BASE_BRANCH}${COLOR_RESET} branch
-	${COLOR_COMMAND}git checkout ${BASE_BRANCH}${COLOR_RESET}
-" >&2
-	exit 2
-}
-
-function create_branch() {
-	local BRANCH=$1
-
-	git checkout -b ${BRANCH} ${BASE_BRANCH}
-}
-
-function finish() {
-	local VERSION=$1
-	local BRANCH=$2
-	local TAG=$3
-	local TARGET_BRANCH="v${VERSION%%[!0-9]*}"
-	local UPSTREAM="origin"
-	local CHANGELOG=$(git diff ${UPSTREAM}/${TARGET_BRANCH} ${BRANCH} CHANGELOG.md | sed -e "/^[^+]/d" -e "s/^\+\(.*\)$/\1/" -e "/^## /d" -e "/^\+/d" -e "/^\[/d" -e "s/\s/%20/g" -e "s/#/%23/g" -e 's/\n//g' | perl -pe "s/\n/%0A/g" | perl -pe "s/^(%0A)+//" | perl -pe "s/(%0A)+$//")
-
-	echo -e "
-Branch ${COLOR_BRANCH}${BRANCH}${COLOR_RESET} has been created.
-Remaining processes are...
-
-1. Make sure all changes are correct
-	${COLOR_COMMAND}git diff ${BASE_BRANCH} ${BRANCH}${COLOR_RESET}
-2. Push to remote ${UPSTREAM}
-	${COLOR_COMMAND}git push --set-upstream ${UPSTREAM} ${BRANCH}${COLOR_RESET}
-3. Create a pull-request: ${COLOR_BRANCH}${BRANCH}${COLOR_RESET} to ${COLOR_BRANCH}${BASE_BRANCH}${COLOR_RESET}
-	${URL_COMPARE}/${BASE_BRANCH}...${BRANCH}?expand=1
-	select ${COLOR_SELECT}Squash and merge${COLOR_RESET}
-4. Create a pull-request: ${COLOR_BRANCH}${BASE_BRANCH}${COLOR_RESET} to ${COLOR_BRANCH}${TARGET_BRANCH}${COLOR_RESET}
-	${URL_COMPARE}/${TARGET_BRANCH}...${BASE_BRANCH}?expand=1&title=version%20${VERSION}&body=${CHANGELOG}
-	select ${COLOR_SELECT}Create a merge commit${COLOR_RESET}
-5. Create a new release
-	${URL_RELEASE}?tag=${TAG}&target=${TARGET_BRANCH}&title=${PACKAGE_NAME}%20${VERSION}%20released&body=${CHANGELOG}
-	Tag version: ${COLOR_INPUT}${TAG}${COLOR_RESET}
-	Target: ${COLOR_INPUT}${TARGET_BRANCH}${COLOR_RESET}
-	Release title: ${COLOR_INPUT}${PACKAGE_NAME} ${VERSION} released${COLOR_RESET}
-	Description this release: (copy and paste CHANGELOG.md)
-6. Post processing
-	${COLOR_COMMAND}git checkout ${BASE_BRANCH}${COLOR_RESET}
-	${COLOR_COMMAND}git pull${COLOR_RESET}
-	${COLOR_COMMAND}git fetch -p${COLOR_RESET}
-	${COLOR_COMMAND}git branch -D ${BRANCH}${COLOR_RESET}
-
-That's all!
-"
-}
-
-main "$@"
--- a/scripts/prepare-release.sh
+++ b/scripts/prepare-release.sh
@ -1,41 +1,59 @@
 #!/bin/bash
-# requires following packages:
-# - git; I believe it's already installed.
-# - sed; GNU sed is preferred. POSIX sed may not work.
+# requires following programs:
+# - git; I believe you have already installed.
+# - sed; Both GNU sed and POSIX sed will work.
+set -eu

-set -e
+GITHUB_BASE="https://github.com"
+GITHUB_USER="shimataro"
+GITHUB_REPO="ssh-key-action"

-COLOR_ERROR="\e[1;41m"
-COLOR_SECTION="\e[1;34m"
-COLOR_COMMAND_NAME="\e[1;34m"
-COLOR_OPTION="\e[4;36m"
-COLOR_COMMAND="\e[4m"
-COLOR_FILE="\e[1;34m"
-COLOR_BRANCH="\e[1;31m"
-COLOR_INPUT="\e[1;31m"
-COLOR_SELECT="\e[1;32m"
-COLOR_RESET="\e[m"
+UPSTREAM="origin"
+
+COLOR_ERROR="\033[1;41m"
+COLOR_SECTION="\033[1;34m"
+COLOR_COMMAND_NAME="\033[1;34m"
+COLOR_OPTION="\033[4;36m"
+COLOR_COMMAND="\033[4m"
+COLOR_FILE="\033[1;34m"
+COLOR_BRANCH="\033[1;31m"
+COLOR_INPUT="\033[1;31m"
+COLOR_SELECT="\033[1;32m"
+COLOR_RESET="\033[m"
+
+URL_PRODUCT="${GITHUB_BASE}/${GITHUB_USER}/${GITHUB_REPO}"
+URL_REPOSITORY="${URL_PRODUCT}.git"
+URL_COMPARE="${URL_PRODUCT}/compare"
+URL_RELEASE="${URL_PRODUCT}/releases/new"

 function main() {
-	if [ $# -lt 1 ]; then
+	cd $(dirname ${0})/..
+
+	if [[ $# -lt 1 ]]; then
 		usage
 	fi

-	cd $(dirname ${0})/..
+	local NEW_VERSION=$1
+	local CURRENT_VERSION=$(
+		node -e 'console.log(JSON.parse(require("fs").readFileSync("package.json")).version)'
+	)
+	local TAG="v${NEW_VERSION}"
+	local BRANCH="release/v${NEW_VERSION}"
+	local BASE_BRANCH="${TAG%%.*}"

-	local VERSION=$1
-	check_version_format ${VERSION}
+	check_version_format ${NEW_VERSION}
+	check_current_branch ${BASE_BRANCH}

-	update_changelog ${VERSION}
-	update_package_version ${VERSION}
-	update_dependencies_version
-	regenerate_package_lock
-	build_package
-	commit_changes ${VERSION}
+	create_branch ${BRANCH} ${BASE_BRANCH}
+	update_package_version ${NEW_VERSION}
+	update_changelog ${NEW_VERSION}
+	verify_package
+	commit_changes ${NEW_VERSION}
+	finish ${NEW_VERSION} ${CURRENT_VERSION} ${BRANCH} ${BASE_BRANCH} ${TAG}
 }

 function usage() {
-	local COMMAND=`basename ${0}`
+	local COMMAND=$(basename ${0})

 	echo -e "${COLOR_SECTION}NAME${COLOR_RESET}
 	${COMMAND} - Prepare for new release
@ -44,12 +62,13 @@ ${COLOR_SECTION}SYNOPSIS${COLOR_RESET}
 	${COLOR_COMMAND_NAME}${COMMAND}${COLOR_RESET} <${COLOR_OPTION}new-version${COLOR_RESET}>

 ${COLOR_SECTION}DESCRIPTION${COLOR_RESET}
-	This command:
-	- updates ${COLOR_FILE}CHANGELOG.md${COLOR_RESET}
-	- updates package version in ${COLOR_FILE}package.json${COLOR_RESET}
-	- updates dependencies version in ${COLOR_FILE}package.json${COLOR_RESET}
-	- verifies
-	- ...and commits!
+	This command will...
+	- create a new branch for release
+	- update ${COLOR_FILE}CHANGELOG.md${COLOR_RESET}
+	- update package version in ${COLOR_FILE}package.json${COLOR_RESET}
+	- update dependencies version in ${COLOR_FILE}package.json${COLOR_RESET}
+	- verify
+	- ...and commit!

 	${COLOR_OPTION}new-version${COLOR_RESET} must follow \"Semantic Versioning\" <https://semver.org/>.
 "
@ -57,7 +76,7 @@ ${COLOR_SECTION}DESCRIPTION${COLOR_RESET}
 }

 function check_version_format() {
-	if [[ $1 =~ ^[0-9]+\.[0-9]+\.[0-9]+ ]]; then
+	if [[ ${1} =~ ^(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*) ]]; then
 		return
 	fi

@ -66,47 +85,118 @@ function check_version_format() {
 	exit 2
 }

+function check_current_branch() {
+	local BASE_BRANCH=$1
+	local CURRENT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
+	if [ ${CURRENT_BRANCH} = ${BASE_BRANCH} ]; then
+		return
+	fi
+
+	echo -e "${COLOR_ERROR}ERROR:${COLOR_RESET} Work on ${COLOR_BRANCH}${BASE_BRANCH}${COLOR_RESET} branch
+	${COLOR_COMMAND}git checkout ${BASE_BRANCH}${COLOR_RESET}
+" >&2
+	exit 2
+}
+
+function create_branch() {
+	local BRANCH=$1
+	local BASE_BRANCH=$2
+
+	git checkout -b ${BRANCH} ${BASE_BRANCH}
+}
+
+function update_package_version() {
+	local VERSION=$1
+
+	npm version --no-git-tag-version ${VERSION}
+}
+
 function update_changelog() {
 	local VERSION=$1
 	local DATE=`date "+%Y-%m-%d"`
 	local KEYWORD="Unreleased"

 	sed -i".bak" -r \
-		-e "s/^((##\s+)\[${KEYWORD}\])$/\1\n\n\2[${VERSION}] - ${DATE}/" \
+		-e "s/^((##[[:space:]]+)\[${KEYWORD}\])$/\1\n\n\2[${VERSION}] - ${DATE}/" \
 		-e "s/^(\[${KEYWORD}\](.*))(v.*)\.\.\.HEAD$/\1v${VERSION}...HEAD\n[${VERSION}]\2\3...v${VERSION}/" \
 		CHANGELOG.md
 }

-function update_package_version() {
-	local VERSION=$1
-
-	sed -i".bak" -r \
-		-e "s/(\"version\"\s*:\s*)\".*?\"/\1\"${VERSION}\"/" \
-		package.json
-}
-
-function update_dependencies_version() {
-	npm ci
-	npm run check-updates -- -u
-}
-
-function regenerate_package_lock() {
-	rm -rf package-lock.json node_modules
-	npm install
-}
-
-function build_package() {
-	npm run build
+function verify_package() {
 	npm run verify
 }

 function commit_changes() {
 	local VERSION=$1

-	rm -rf node_modules
-	npm ci --only=production
-	git add CHANGELOG.md package.json package-lock.json node_modules lib
+	git add CHANGELOG.md package.json package-lock.json
 	git commit -m "version ${VERSION}"
 }

+function finish() {
+	local NEW_VERSION="${1}"
+	local CURRENT_VERSION="${2}"
+	local BRANCH="${3}"
+	local BASE_BRANCH="${4}"
+	local TAG="${5}"
+
+	local TITLE="${GITHUB_REPO} ${NEW_VERSION} released"
+	local CHANGELOG=$(
+		git diff v${CURRENT_VERSION} -- CHANGELOG.md |
+		sed -r -e '/^[^+]/d' -e 's/^\+(.*)$/\1/' -e '/^## /d' -e '/^\+/d' -e '/^\[/d' |
+		urlencode |
+		replace_lf
+	)
+	local PRERELEASE=0
+	if [[ ${NEW_VERSION} == "0."* ]]; then
+		# < 1.0.0
+		PRERELEASE=1
+	fi
+	if [[ ${NEW_VERSION} =~ -[0-9a-zA-Z] ]]; then
+		# -alpha, -pre, -rc, etc...
+		PRERELEASE=1
+	fi
+
+	echo -e "
+Branch ${COLOR_BRANCH}${BRANCH}${COLOR_RESET} has been created.
+Remaining processes are...
+
+1. Make sure all changes are correct
+	${COLOR_COMMAND}git diff ${BASE_BRANCH} ${BRANCH}${COLOR_RESET}
+2. Push to remote ${UPSTREAM}
+	${COLOR_COMMAND}git push --set-upstream ${UPSTREAM} ${BRANCH}${COLOR_RESET}
+3. Create a pull-request: ${COLOR_BRANCH}${BRANCH}${COLOR_RESET} to ${COLOR_BRANCH}${BASE_BRANCH}${COLOR_RESET}
+	${URL_COMPARE}/${BASE_BRANCH}...${BRANCH}?expand=1
+	select ${COLOR_SELECT}Squash and merge${COLOR_RESET}
+4. Create a new release
+	${URL_RELEASE}?tag=${TAG}&target=${BASE_BRANCH}&title=$(urlencode <<<"${TITLE}")&body=${CHANGELOG}&prerelease=${PRERELEASE}
+	Tag version: ${COLOR_INPUT}${TAG}${COLOR_RESET}
+	Target: ${COLOR_INPUT}${BASE_BRANCH}${COLOR_RESET}
+	Release title: ${COLOR_INPUT}${TITLE}${COLOR_RESET}
+	Description this release: (copy and paste CHANGELOG.md)
+5. Post processing
+	${COLOR_COMMAND}git checkout ${BASE_BRANCH}${COLOR_RESET}
+	${COLOR_COMMAND}git pull${COLOR_RESET}
+	${COLOR_COMMAND}git fetch -p${COLOR_RESET}
+	${COLOR_COMMAND}git branch -D ${BRANCH}${COLOR_RESET}
+
+That's all!
+"
+}
+
+function urlencode() {
+	# https://developer.mozilla.org/en-US/docs/Glossary/percent-encoding
+	sed -r \
+		-e 's/%/%25/g' \
+		-e 's/\$/%24/g' -e 's/\(/%28/g' -e 's/\)/%29/g' -e 's/\*/%2A/g' -e 's/\+/%2B/g' -e 's/\//%2F/g' -e 's/\?/%3F/g' -e 's/\[/%5B/g' -e 's/\]/%5D/g' \
+		-e 's/!/%21/g' -e 's/#/%23/g' -e 's/&/%26/g' -e "s/'/%27/g" -e 's/,/%2C/g' -e 's/:/%3A/g' -e 's/;/%3B/g' -e 's/=/%3D/g' -e 's/@/%40/g' \
+		-e 's/ /+/g'
+}
+
+function replace_lf() {
+	sed -r \
+		-e ':a' -e 'N' -e '$!ba' \
+		-e 's/^\n+//' -e 's/\n+$//' -e 's/\n/%0A/g'
+}
+
 main "$@"
--- a/scripts/rebuild.sh
+++ b/scripts/rebuild.sh
@ -1,6 +1,5 @@
 #!/bin/bash
-
-set -e
+set -eu

 npm ci
 npm run build
@ -8,4 +7,4 @@ npm run verify

 rm -rf node_modules
 npm ci --only=production
-git add node_modules lib
+git add dist
--- a/scripts/update-dependencies.sh
+++ b/scripts/update-dependencies.sh
@ -1,16 +1,23 @@
 #!/bin/bash
 # update dependencies
-
-set -e
+set -eu

 DATE=$(date +"%Y%m%d")
-BRANCH=feature/update-dependencies-${DATE}
-COLOR_SUCCESS="\e[1;32m"
-COLOR_RESET="\e[m"
+BASE_BRANCH=$(git rev-parse --abbrev-ref HEAD)
+TARGET_BRANCH=feature/update-dependencies-${DATE}

-# create branch
-git checkout develop
-git checkout -b ${BRANCH}
+COLOR_SUCCESS="\033[1;32m"
+COLOR_ERROR="\033[1;41m"
+COLOR_RESET="\033[m"
+
+cd $(dirname ${0})/..
+
+# create target branch
+if [[ ! ${BASE_BRANCH} =~ ^v[0-9]+$ ]]; then
+	echo -e "${COLOR_ERROR}Error:${COLOR_RESET} Base branch must match 'v*'; got '${BASE_BRANCH}'."
+	exit 1
+fi
+git checkout -b ${TARGET_BRANCH}

 # check updates
 npm ci
@ -19,22 +26,21 @@ npm run check-updates -- -u
 # re-install packages
 rm -rf package-lock.json node_modules
 npm i
+npm dedupe

-# check
+# test
 npm run build
 npm run verify

 # commit
-rm -rf node_modules
-npm ci --only=production
-git add package.json package-lock.json node_modules
+git add package.json package-lock.json dist
 git commit -m "update dependencies"

 # finished!
 echo -e "
 ${COLOR_SUCCESS}🎉All dependencies are updated successfully.🎉${COLOR_RESET}

-Push changes and merge into 'develop' branch.
+Push changes and merge into '${BASE_BRANCH}' branch.

-    git push --set-upstream origin ${BRANCH}
+    git push --set-upstream origin ${TARGET_BRANCH}
 "
--- a/src/common.ts
+++ b/src/common.ts
@ -0,0 +1,76 @@
+import * as fs from "fs";
+import * as os from "os";
+import * as path from "path";
+
+import * as core from "@actions/core";
+
+/** state name of backup suffix */
+const STATE_BACKUP_SUFFIX = "backup-suffix";
+const STATE_CREATED_FILES = "created-files";
+
+/**
+ * create backup suffix name
+ * @param dirName directory to back up
+ * @returns backup suffix; empty string if directory does not exist
+ */
+export function createBackupSuffix(dirName: string): string {
+    if (!fs.existsSync(dirName)) {
+        return "";
+    }
+
+    const backupSuffix = `.bak-${Date.now()}`;
+    core.saveState(STATE_BACKUP_SUFFIX, backupSuffix);
+    return backupSuffix;
+}
+
+/**
+ * get backup suffix name
+ * @returns backup suffix (if not, empty string)
+ */
+export function getBackupSuffix(): string {
+    return core.getState(STATE_BACKUP_SUFFIX);
+}
+
+/**
+ * save created file names
+ * @param fileNames array of file names
+ */
+export function saveCreatedFileNames(fileNames: string[]): void {
+    const json = JSON.stringify(fileNames);
+    core.saveState(STATE_CREATED_FILES, json);
+}
+
+/**
+ * save created file names
+ * @returns saved array of file names
+ */
+export function loadCreatedFileNames(): string[] {
+    const json = core.getState(STATE_CREATED_FILES);
+    if (json === "") {
+        return [];
+    }
+
+    return JSON.parse(json) as string[];
+}
+
+/**
+ * get SSH directory
+ * @returns SSH directory name
+ */
+export function getSshDirectory(): string {
+    return path.resolve(getHomeDirectory(), ".ssh");
+}
+
+/**
+ * get home directory
+ * @returns home directory name
+ */
+function getHomeDirectory(): string {
+    const homedir = os.homedir();
+    if (homedir === "/github/home") {
+        // Docker container
+        return "/root";
+    }
+
+    return homedir;
+}
--- a/src/main.ts
+++ b/src/main.ts
@ -1,132 +1,223 @@
-import fs from "fs";
-import path from "path";
+import * as fs from "fs";
+import * as path from "path";

 import * as core from "@actions/core";

-interface FileInfo
-{
-	name: string;
-	contents: string;
-	options: fs.WriteFileOptions;
+import * as common from "./common";
+
+/** file creation info */
+interface FileInfo {
+    /** file name */
+    name: string;
+    /** file contents */
+    contents: string;
+    /** creation options */
+    options: fs.WriteFileOptions;
+    /** file must not exist when creating */
+    mustNotExist: boolean;
+}
+
+/** default known_hosts */
+const KNOWN_HOSTS = [
+    "github.com ssh-rsa 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",
+];
+
+try {
+    main();
+} catch (err) {
+    if (err instanceof Error) {
+        core.setFailed(err);
+    }
 }

 /**
 * main function
 */
-function main(): void
-{
-	try
-	{
-		const files: FileInfo[] = [
-			{
-				name: core.getInput("name"),
-				contents: core.getInput("key", {
-					required: true,
-				}),
-				options: {
-					mode: 0o400,
-					flag: "ax",
-				},
-			},
-			{
-				name: "known_hosts",
-				contents: insertLf(core.getInput("known_hosts", {
-					required: true,
-				})),
-				options: {
-					mode: 0o644,
-					flag: "a",
-				},
-			},
-			{
-				name: "config",
-				contents: insertLf(core.getInput("config")),
-				options: {
-					mode: 0o644,
-					flag: "a",
-				},
-			},
-		];
+export function main(): void {
+    const sshDirName = common.getSshDirectory();

-		// create ".ssh" directory
-		const home = getHomeDirectory();
-		const dirName = path.resolve(home, ".ssh");
-		fs.mkdirSync(dirName, {
-			recursive: true,
-			mode: 0o700,
-		});
+    // create ".ssh" directory
+    const backupSuffix = common.createBackupSuffix(sshDirName);
+    if (backupSuffix === "") {
+        createDirectory(sshDirName);
+        console.log(`✅SSH directory "${sshDirName}" has been created successfully.`);
+    }

-		// create files
-		for(const file of files)
-		{
-			const fileName = path.join(dirName, file.name);
-			fs.writeFileSync(fileName, file.contents, file.options);
-		}
+    // files to be created
+    const files = buildFilesToCreate(sshDirName);

-		console.log(`SSH key has been stored to ${dirName} successfully.`);
-	}
-	catch(err)
-	{
-		core.setFailed(err.message);
-	}
+    // back up & create files
+    const createdFileNames: string[] = [];
+    const backedUpFileNames: string[] = [];
+    for (const file of files) {
+        const pathName = path.join(sshDirName, file.name);
+        if (backup(pathName, backupSuffix, file.mustNotExist)) {
+            backedUpFileNames.push(file.name);
+        }
+
+        fs.writeFileSync(pathName, file.contents, file.options);
+        createdFileNames.push(file.name);
+    }
+    common.saveCreatedFileNames(createdFileNames);
+
+    if (createdFileNames.length > 0) {
+        console.log(`✅Following files have been created in "${sshDirName}" successfully; ${createdFileNames.join(", ")}`);
+    }
+    if (backedUpFileNames.length > 0) {
+        console.log(`✅Following files have been backed up in suffix "${backupSuffix}" successfully; ${backedUpFileNames.join(", ")}`);
+    }
 }

 /**
- * get home directory
- * @returns home directory
+ * build files to create
+ * @param dirName directory name in where files will be created
+ * @returns files
 */
-function getHomeDirectory(): string
-{
-	const homeEnv = getHomeEnv();
-	const home = process.env[homeEnv];
-	if(home === undefined)
-	{
-		throw Error(`${homeEnv} is not defined`);
-	}
+function buildFilesToCreate(dirName: string): FileInfo[] {
+    // parameters
+    const key = core.getInput("key", {
+        required: true,
+    });
+    const name = core.getInput("name");
+    const knownHosts = core.getInput("known_hosts", {
+        required: true,
+    });
+    const config = core.getInput("config");
+    const ifKeyExists = core.getInput("if_key_exists");

-	return home;
+    // files to be created
+    const files: FileInfo[] = [
+        {
+            name: "known_hosts",
+            contents: insertLf(buildKnownHostsArray(knownHosts).join("\n"), true, true),
+            options: {
+                mode: 0o644,
+                flag: "a",
+            },
+            mustNotExist: false,
+        },
+    ];
+    if (shouldCreateKeyFile(path.join(dirName, name), ifKeyExists)) {
+        files.push({
+            name: name,
+            contents: insertLf(key, false, true),
+            options: {
+                mode: 0o400,
+                flag: "wx",
+            },
+            mustNotExist: true,
+        });
+    }
+    if (config !== "") {
+        files.push({
+            name: "config",
+            contents: insertLf(config, true, true),
+            options: {
+                mode: 0o644,
+                flag: "a",
+            },
+            mustNotExist: false,
+        });
+    }
+
+    return files;
 }

 /**
- * get HOME environment name
- * @returns HOME environment name
+ * create directory
+ * @param dirName directory name to remove
 */
-function getHomeEnv(): string
-{
-	if(process.platform === "win32")
-	{
-		// Windows
-		return "USERPROFILE";
-	}
+function createDirectory(dirName: string): void {
+    fs.mkdirSync(dirName, {
+        recursive: true,
+        mode: 0o700,
+    });
+}

-	// macOS / Linux
-	return "HOME";
+/**
+ * back up file
+ * @param fileName file to back up
+ * @param backupSuffix suffix
+ * @param removeOrig remove original file
+ * @returns is file backed up?
+ */
+function backup(fileName: string, backupSuffix: string, removeOrig: boolean): boolean {
+    if (backupSuffix === "") {
+        return false;
+    }
+    if (!fs.existsSync(fileName)) {
+        return false;
+    }
+
+    // move -> copy (in order to keep permissions when restore)
+    const fileNameBak = `${fileName}${backupSuffix}`;
+    fs.renameSync(fileName, fileNameBak);
+    if (!removeOrig) {
+        fs.copyFileSync(fileNameBak, fileName);
+    }
+
+    return true;
 }

 /**
 * prepend/append LF to value if not empty
- * @param value the value to prepend LF
- * @returns prepended value
+ * @param value the value to insert LF
+ * @param prepend true to prepend
+ * @param append true to append
+ * @returns new value
 */
-function insertLf(value: string): string
-{
-	let affectedValue = value;
+function insertLf(value: string, prepend: boolean, append: boolean): string {
+    let affectedValue = value;

-	if(value.length === 0)
-	{
-		// do nothing if empty
-		return "";
-	}
-	if(!affectedValue.startsWith("\n"))
-	{
-		affectedValue = `\n${affectedValue}`;
-	}
-	if(!affectedValue.endsWith("\n"))
-	{
-		affectedValue = `${affectedValue}\n`;
-	}
+    if (value.length === 0) {
+        // do nothing if empty
+        return "";
+    }
+    if (prepend && !affectedValue.startsWith("\n")) {
+        affectedValue = `\n${affectedValue}`;
+    }
+    if (append && !affectedValue.endsWith("\n")) {
+        affectedValue = `${affectedValue}\n`;
+    }

-	return affectedValue;
+    return affectedValue;
 }

-main();
+/**
+ * should create SSH key file?
+ * @param keyFilePath path of key file
+ * @param ifKeyExists action if SSH key exists
+ * @returns Yes/No
+ */
+function shouldCreateKeyFile(keyFilePath: string, ifKeyExists: string): boolean {
+    if (!fs.existsSync(keyFilePath)) {
+        // should create if file does not exist
+        return true;
+    }
+
+    switch (ifKeyExists) {
+        case "replace":
+            // should create if replace (existing file will be backed up when creating)
+            return true;
+
+        case "ignore":
+            // should NOT create if ignore
+            return false;
+
+        default:
+            // error otherwise
+            throw new Error(`SSH key is already installed. Set "if_key_exists" to "replace" or "ignore" in order to avoid this error.`);
+    }
+}
+
+/**
+ * build array of known_hosts
+ * @param knownHosts known_hosts
+ * @returns array of known_hosts
+ */
+function buildKnownHostsArray(knownHosts: string): string[] {
+    if (knownHosts === "unnecessary") {
+        return KNOWN_HOSTS;
+    }
+    return KNOWN_HOSTS.concat(knownHosts);
+}
--- a/src/post.ts
+++ b/src/post.ts
@ -0,0 +1,89 @@
+import * as fs from "fs";
+import * as path from "path";
+
+import * as core from "@actions/core";
+
+import * as common from "./common";
+
+try {
+    post();
+} catch (err) {
+    if (err instanceof Error) {
+        core.setFailed(err);
+    }
+}
+
+/**
+ * cleanup function
+ */
+export function post(): void {
+    const sshDirName = common.getSshDirectory();
+    const backupSuffix = common.getBackupSuffix();
+    if (backupSuffix === "") {
+        // remove ".ssh" directory if suffix is not set
+        removeDirectory(sshDirName);
+        console.log(`✅SSH directory "${sshDirName}" has been removed successfully.`);
+    } else {
+        // remove created files and restore from backup
+        const removedFileNames = removeCreatedFiles(sshDirName);
+        if (removedFileNames.length > 0) {
+            console.log(`✅Following files have been removed successfully; ${removedFileNames.join(", ")}`);
+        }
+
+        const restoredFileNames = restoreFiles(sshDirName, backupSuffix);
+        if (restoredFileNames.length > 0) {
+            console.log(`✅Following files in suffix "${backupSuffix}" have been restored successfully; ${restoredFileNames.join(", ")}`);
+        }
+    }
+}
+
+/**
+ * remove directory
+ * @param dirName directory name to remove
+ */
+function removeDirectory(dirName: string): void {
+    fs.rmSync(dirName, {
+        recursive: true,
+        force: true,
+    });
+}
+
+/**
+ * remove created files in main phase
+ * @param dirName directory name
+ * @returns removed file names
+ */
+function removeCreatedFiles(dirName: string): string[] {
+    const createdFileNames = common.loadCreatedFileNames();
+    for (const fileName of createdFileNames) {
+        const pathName = path.join(dirName, fileName);
+
+        fs.rmSync(pathName);
+    }
+    return createdFileNames;
+}
+
+/**
+ * restore files from backups
+ * @param dirName directory name
+ * @param backupSuffix suffix of backup directory
+ * @returns restored file names
+ */
+function restoreFiles(dirName: string, backupSuffix: string): string[] {
+    const restoredFileNames: string[] = [];
+    const entries = fs.readdirSync(dirName)
+        .filter((entry) => {
+            // skip if not a backed-up file
+            return entry.endsWith(backupSuffix);
+        });
+
+    for (const entry of entries) {
+        const entryOrg = entry.substring(0, entry.length - backupSuffix.length);
+        const pathNameOrg = path.join(dirName, entryOrg);
+        const pathNameBak = path.join(dirName, entry);
+
+        fs.renameSync(pathNameBak, pathNameOrg);
+        restoredFileNames.push(entryOrg);
+    }
+    return restoredFileNames;
+}
--- a/tsconfig.json
+++ b/tsconfig.json
@ -2,11 +2,12 @@
  "compilerOptions": {
    "target": "es6",
    "module": "commonjs",
+    "moduleResolution": "node",
    "lib": [
      "es6"
    ],
    "sourceMap": true,
-    "outDir": "./lib",
+    "outDir": "./dist",
    "rootDir": "./src",

    "strict": true,
Author	SHA1	Message	Date
shimataro	d4fffb5087	version 2.7.0 (#270 )	2024-02-11 11:30:38 +09:00
shimataro	9383557752	update dependencies (#269 )	2024-02-11 11:18:12 +09:00
shimataro	8f0e25e199	Feature/node20 (#268 ) * Update to Node 20 (#267) * Update action.yml * Update build.yml * update CHANGELOG * Drop old containers * update CHANGELOG --------- Co-authored-by: Po Chen <chenpaul914@gmail.com>	2024-02-11 11:04:28 +09:00
shimataro	38b53cb2f4	version 2.6.1 (#264 )	2023-10-13 10:02:31 +09:00
shimataro	9e1a5e7913	use cache for npm (#263 )	2023-10-13 09:39:50 +09:00
shimataro	c858f8173b	update dependencies (#262 )	2023-10-13 09:06:52 +09:00
shimataro	f848d33143	fix; release script error (#261 )	2023-10-12 10:27:38 +09:00
shimataro	b49a036be4	fix; JSON parse error on exit, if `if_key_exists`=`fail` and key exists (#260 ) * fix; JSON parse error on exit, if `if_key_exists`=`fail` and key exists * update CHANGELOG * fix cleanup error * add built files * output only if created/removed/restored file exist.	2023-10-12 09:58:46 +09:00
shimataro	18e8292da0	update release script (#259 )	2023-10-12 05:00:12 +09:00
shimataro	d05e1bdf7d	Merge pull request #258 from shimataro/develop version 2.6.0	2023-10-12 04:11:09 +09:00
shimataro	a9c5970ee8	version 2.6.0 (#257 )	2023-10-11 22:58:33 +09:00
shimataro	ccfb951a8e	fix; files that didn't backed up is not removed in "post" phase (#256 ) * fix; files that didn't backed up is not removed in "post" phase * output logs * output log in main phase * update log text * update log text * create directory only if not exist * amend step name	2023-10-11 16:20:54 +09:00
shimataro	ab731d2fcd	update dependencies (#255 )	2023-10-11 07:44:42 +09:00
shimataro	51874aa964	exit if differ (#254 )	2023-10-11 05:25:38 +09:00
shimataro	00676f1f60	use `os.homedir()` in order to get home directory (#253 )	2023-10-11 05:04:21 +09:00
shimataro	6948892be9	use module files (#252 ) * use module * detect files to be restore automatically * use esbuild * drop ncc * add comments * refactor	2023-10-11 04:35:20 +09:00
shimataro	31d4b8b483	backup & restore (#251 ) * backup & restore * refactor * refactor * back up key file * fix messages * update CHANGELOG * update CHANGELOG	2023-10-10 13:51:45 +09:00
shimataro	2983fc456f	Feature/remove old runner (#249 ) * Drop runnner: macOS 10.15, Ubuntu 18.04 * update README * update CHANGELOG * update key of bitbucket.com	2023-10-09 18:25:53 +09:00
shimataro	f5671c022c	update dependencies (#241 )	2023-03-25 05:53:47 +09:00
shimataro	685d0f20da	Merge pull request #240 from shimataro/develop version 2.5.1	2023-03-25 05:13:30 +09:00
shimataro	699cc3af2a	version 2.5.1 (#239 )	2023-03-25 04:53:10 +09:00
shimataro	18601dcd44	Feature/update gh key (#238 ) * github: Update SSH key Signed-off-by: Ryan Northey <ryan@synca.io> * update GitHub key: https://github.blog/2023-03-23-we-updated-our-rsa-ssh-host-key/ * add name --------- Signed-off-by: Ryan Northey <ryan@synca.io> Co-authored-by: Ryan Northey <ryan@synca.io>	2023-03-25 04:27:28 +09:00
shimataro	02d189fc92	Merge pull request #230 from shimataro/develop version 2.5.0	2022-12-24 21:59:35 +09:00
shimataro	70366947e2	version 2.5.0 (#229 )	2022-12-24 21:37:26 +09:00
shimataro	00376433fd	update dependencies (#228 )	2022-12-24 20:55:12 +09:00
shimataro	d3bad3234b	update dependencies (#227 )	2022-12-21 17:36:57 +09:00
shimataro	c8a575584e	set workflow name (#226 ) * set workflow name * update actions/checkout version: v2 -> v3 * update actions/setup-node version: v1 -> v3	2022-12-21 11:14:30 +09:00
shimataro	da84e6bf98	Feature/ci (#225 ) * reuse workflows https://docs.github.com/en/actions/using-workflows/reusing-workflows * reuse container workflows * integrate reusable-verify-container with reusable-verify * container -> docker_iamge * update description	2022-12-20 22:11:39 +09:00
shimataro	7cccbd3065	add cleanup process (#224 ) * add cleanup process * save state * update README/CHANGELOG * fix message * `getSshDirectory()` should not be exported	2022-12-20 08:06:55 +09:00
shimataro	86a65fd09b	Merge pull request #222 from shimataro/develop version 2.4.0	2022-11-03 05:05:47 +09:00
shimataro	193316a178	version 2.4.0 (#221 )	2022-11-03 04:41:33 +09:00
shimataro	a3a8a38571	update dependencies (#220 )	2022-11-03 04:12:51 +09:00
shimataro	1512adeca4	Feature/GitHub key (#122 ) * always prepend key of github.com * update README and CHANGELOG * update tests * test to connect bitbucket.org * update test * update rest tests	2022-11-03 03:41:25 +09:00
shimataro	bcb314ec07	fix usage of rsync (#218 )	2022-10-31 00:31:19 +09:00
shimataro	53a7c26e5e	Feature/runners (#217 ) * Updated runners list and tar updated to 6.1.11 * Updated runners list * Added nodejs 16 * Updated .gitignore * some adjusts * update CHANGELOG Co-authored-by: Viacheslav Kudinov <viacheslav.kudinov@gmail.com>	2022-10-30 23:46:03 +09:00
shimataro	fc21805258	Update nodejs version to 16 (#208 ) (#216 ) * Update nodejs version to 16 (#208) * Update nodejs version to 16 * Update runtime used to node16 * update CHANGELOG Co-authored-by: Davide Doronzo <duddu@users.noreply.github.com>	2022-10-30 22:47:45 +09:00
shimataro	1926ba6435	update dependencies (#211 )	2022-10-30 21:57:29 +09:00
shimataro	adea214356	Feature/refactor (#209 ) * Change code style to 1TBS * refactor creating ".ssh" directoy * Add Windows-2022 / macOS-11 / macOS-12 / Ubuntu-22.04 Drop Ubuntu-16.04 * Drop centos:8 (Docker container) * add CentOS 8 Stream (Docker container) * use YAML alias * Revert "use YAML alias" This reverts commit `1ddbc7fde8`. * update .eslintrc * move calling main to front	2022-10-30 19:57:06 +09:00
shimataro	3c9b0fc6f2	Merge pull request #190 from shimataro/develop version 2.3.1	2021-08-01 23:19:32 +09:00
shimataro	b38d88da8a	version 2.3.1 (#189 )	2021-08-01 23:04:08 +09:00
shimataro	92fef6465a	Feature/virtual environments (#187 ) * remove ubuntu-16.04 virtual environment; https://github.blog/changelog/2021-04-29-github-actions-ubuntu-16-04-lts-virtual-environment-will-be-removed-on-september-20-2021/ * add `windows-2016` virtual environment * update README/CHANGELOG * remove ubuntu-16.04 fix tests on Windows/macOS	2021-08-01 22:31:32 +09:00
shimataro	a46749e290	Feature/update dependencies 20210801 (#186 ) * update dependencies * update CHANGELOG	2021-08-01 21:52:23 +09:00
shimataro	ce5317ebbf	Merge pull request #183 from shimataro/develop version 2.3.0	2021-03-21 16:25:36 +09:00
shimataro	4dfaf8f393	version 2.3.0 (#182 )	2021-03-21 16:05:33 +09:00
shimataro	954c620b17	Feature/no known hosts (#181 ) * add "if_key_exists" * add test * fix flag * fix SSH connection commands * add test for if_key_exists=ignore * add test for if_key_exists=fail * add tests to Windows / macOS * update CHANGELOG * update badges * update README * fix README * update README * test no_known_hosts parameter * implement * ignore known_hosts if no_known_hosts is true * refactor * no_known_hosts is false * Revert "no_known_hosts is false" This reverts commit `206d310c5c`. * test on Windows / macOS * test on Docker containers * add tests for Docker containers * test no_known_hosts parameter * implement * ignore known_hosts if no_known_hosts is true * refactor * no_known_hosts is false * Revert "no_known_hosts is false" This reverts commit `206d310c5c`. * test on Windows / macOS * test on Docker containers * use `known_hosts: no` instead of `no_known_hosts: true` * update README * update README * "known_hosts: no" -> "known_hosts: unnecessary" * update README * update README * update CHANGELOG	2021-03-21 15:43:28 +09:00
shimataro	f8aa6610de	Feature/verify on container alpine (#180 ) * support Alpine Docker container * add Git package * update README * update README; add install commands * update CHANGELOG * fix typo * fix typo	2021-03-21 14:56:48 +09:00
shimataro	88fb14d113	add "if_key_exists" (#179 ) * add "if_key_exists" * add test * fix flag * fix SSH connection commands * add test for if_key_exists=ignore * add test for if_key_exists=fail * add tests to Windows / macOS * update CHANGELOG * update badges * update README * fix README * update README * add tests for Docker containers	2021-03-18 20:57:28 +09:00
shimataro	0bbd533afd	Merge pull request #178 from shimataro/develop version 2.2.0	2021-02-27 14:16:22 +09:00
shimataro	8053198ce5	version 2.2.0 (#177 )	2021-02-27 14:09:25 +09:00
shimataro	68b956be12	Feature/centos (#176 ) * check on CentOS container * update README * update links * update CHANGELOG * refactor insertLf()	2021-02-24 21:24:03 +09:00
shimataro	cdcc4725b3	test on Docker for Windows (#175 ) * test on Docker for Windows * Revert "test on Docker for Windows" This reverts commit `5ad4baf9d8`. * update README	2021-02-23 11:27:02 +09:00
shimataro	80ed341cfe	update dependencies (#174 )	2021-02-23 10:42:34 +09:00
shimataro	4b6bc79244	Feature/matrix docker container (#173 ) * use matrix for Docker container * update badge	2021-02-23 10:38:18 +09:00
shimataro	5b144c9cec	remove "pull_request" trigger from CI (#172 )	2021-02-23 10:25:44 +09:00
shimataro	e83b5ac86d	support OpenSSH key format (#171 ) * Make up for LF in last line of SSH key file * refactor insertLf() * add test for OpenSSH format * add PKCS8 format * apply to other virtual machines * update README * update CHANGELOG Co-authored-by: Tatsunori Uchino <tats.u@live.jp>	2021-02-23 10:22:30 +09:00
shimataro	026e5f82bf	Feature/container (#170 ) * support Docker container * move .ssh to /root * remove print step * change home directory for Docker container * print HOME * print home * print home * update dist file * update dirname * update CHANGELOG * add badge	2021-02-08 23:31:19 +09:00
shimataro	0b924ac88f	update dependencies (#169 )	2021-02-08 22:40:11 +09:00
shimataro	a988908393	Feature/ignore node modules (#166 ) * Ignore Node files that should not be tracked The list can be fetched by `gibo dump node`. * Untrack node_modules/@actions * Cache node_modules * Don't add node_modules ins Bash scripts * Use ncc to pack dependencies * Change final product path Remove & ignore previous one (lib/main.js{,.map}) * Disable PR check using author's key Author's key is not passed to PR builds (#164) * update settings * update CHANGELOG * update build.yml Co-authored-by: Tatsunori Uchino <tats.u@live.jp>	2021-02-08 22:19:05 +09:00
shimataro	47a775a015	Feature/fix readme (#167 ) * fix README.md * update README Co-authored-by: KimSoungRyoul <KimSoungRyoul@gmail.com>	2021-02-08 21:40:22 +09:00
dependabot[bot]	66374eaff9	Bump @actions/core from 1.2.4 to 1.2.6 (#158 ) Bumps [@actions/core](https://github.com/actions/toolkit/tree/HEAD/packages/core) from 1.2.4 to 1.2.6. - [Release notes](https://github.com/actions/toolkit/releases) - [Changelog](https://github.com/actions/toolkit/blob/main/packages/core/RELEASES.md) - [Commits](https://github.com/actions/toolkit/commits/HEAD/packages/core) Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>	2020-10-10 22:53:14 +09:00
shimataro	c1b9a14080	Feature/funding (#155 ) * Create FUNDING.yml * add PayPal.ME URL	2020-09-03 00:40:40 +09:00
				`@ -1 +0,0 @@`
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