Github Actions: shard rspec by top-level description.

This is done by doing `rspec -fd --dry-run` and selecting only top-level descriptions
Then feeding that into a matrix setting.

Hopefully this will make testing faster/easier to debug when there are flakey tests.

.github/workflows/ruby.yml

@@ -6,11 +6,30 @@ on:
     branches: [main]
 
 jobs:
+  split:
+    runs-on: ubuntu-24.04 
+    outputs:
+      rspec_groups: ${{ steps.groups.outputs.rspec_groups }}
+    steps:
+    - uses: actions/checkout@v3
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: '3.4'
+        bundler-cache: true
+    - id: groups
+      run: |
+        printf "rspec_groups<<JSON\n" >> $GITHUB_OUTPUT
+        bundle exec rspec -fd --dry-run | sed -ne '/^Finished in /q; /^\S/p' | jq -R | jq -s >> $GITHUB_OUTPUT
+        printf "JSON\n" >> $GITHUB_OUTPUT
+
   test:
     runs-on: ubuntu-22.04
+    needs: [ split ]
     strategy:
+      fail-fast: false
       matrix:
         ruby-version: ['2.7', '3.0', '3.1', '3.4']
+        rspec-group: ${{ fromJSON(needs.split.outputs.rspec_groups) }}
     steps:
     - run: |
         sudo apt-get update
@@ -21,10 +40,7 @@ jobs:
         ruby-version: ${{ matrix.ruby-version }}
         bundler-cache: true # runs 'bundle install' and caches installed gems automatically
     - run: |
-        if [ ! -z "$RUNNER_DEBUG" ] ; then
+        [ ! -z "$RUNNER_DEBUG" ] && export DEBUG=1
-          DEBUG=1 bundle exec rspec -fd
+        bundle exec rspec -fd -e "${{ matrix.rspec-group }}"
-        else
-          bundle exec rspec
-        fi
       env:
         SHELL: /usr/bin/bash

lib/fpm/package/python.rb

@@ -375,11 +375,15 @@ class FPM::Package::Python < FPM::Package
 
       logger.info("Setting default python executable", :name => default_python)
       attributes[:python_bin] = default_python
+    end
 
     if !attributes[:python_package_name_prefix_given?]
-        attributes[:python_package_name_prefix] = default_python
+      major = nil
-        logger.info("Setting package name prefix", :name => default_python)
+      execmd([attributes[:python_bin], "-c", "import sys; print(sys.version_info[0])"], :stdin => false, :stderr => false) do |stdout|
+        major = stdout.readline.chomp
       end
+      attributes[:python_package_name_prefix] = "python#{major}"
+      logger.info("Setting package name prefix based on python major version #{major}", :name => attributes[:python_package_name_prefix])
     end
 
     if attributes[:python_internal_pip?]

lib/fpm/version.rb

@@ -1,3 +1,3 @@
 module FPM
-  VERSION = "1.17.0.pre1"
+  VERSION = "1.17.0"
 end

spec/fpm/package/python_spec.rb

@@ -38,6 +38,11 @@ describe FPM::Package::Python do
     #subject.attributes[:python_bin] = find_python
   end
 
+
+  let(:python_major) do 
+    `#{subject.attributes[:python_bin]} -c "import sys; print(sys.version_info[0])"`.chomp
+  end
+
   let (:example_dir) do
     File.expand_path("../../fixtures/python/", File.dirname(__FILE__))
   end
@@ -56,9 +61,11 @@ describe FPM::Package::Python do
       end
 
       context "and :python_package_name_prefix is nil/default" do
-        it "should prefix the package name based on detected python-bin name" do
+        it "should prefix the package name based on detected python-bin version" do
           subject.input(example_dir)
-          insist { subject.name } == "#{subject.attributes[:python_bin]}-Example"
+          reject { subject.attributes[:python_package_name_prefix_given?] }
+          insist { subject.attributes[:python_package_name_prefix] } == "python#{python_major}"
+          insist { subject.name } == "python#{python_major}-Example"
         end
       end
 
@@ -99,7 +106,7 @@ describe FPM::Package::Python do
         it "should prefix the package based on the version of python" do
           subject.input(example_dir)
           insist { subject.attributes[:python_package_name_prefix_given?] }.nil?
-          insist { subject.name } == "#{subject.attributes[:python_bin]}-example"
+          insist { subject.name } == "python#{python_major}-example"
         end
       end