refactor: make Signal to be type alias of std::string (#80)

std::string is not designed to be inherited form.
The destructor of std::string isn't virtual.

Signed-off-by: ComixHe <ComixHe1895@outlook.com>

.format

@@ -1 +1 @@
-Subproject commit 86250216b60370fa08310d80fb8d4ef3d9b674f0
+Subproject commit 95bc22d2c878c40eb8800781483ec8aafc2d9f86

.github/workflows/checks.yaml

@@ -36,7 +36,7 @@ jobs:
           path: .cache/cpm/source
           key: ${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
       - name: Setup cmake
-        uses: jwlawson/actions-setup-cmake@v1.14
+        uses: jwlawson/actions-setup-cmake@v2.0
       - name: Install system dependencies
         run: |
           apt update &&
@@ -65,8 +65,13 @@ jobs:
           cmake --workflow --preset ci
   pass:
     name: Pass
-    needs: [checks, build-and-test]
+    if: always()
+    needs:
+      - checks
+      - build-and-test
     runs-on: ubuntu-latest
     steps:
-      - name: Placeholder
-        run: true
+      - name: Decide whether the needed jobs succeeded or failed
+        uses: re-actors/alls-green@release/v1
+        with:
+          jobs: ${{ toJSON(needs) }}

CMakeLists.txt

@@ -1,65 +1,77 @@
-cmake_minimum_required(VERSION 3.14..3.28.3)
+cmake_minimum_required(VERSION 3.11.4)
 
 project(
   ocppi
   LANGUAGES CXX
-  VERSION 0.2.3)
-
-option(OCPPI_BUILD_EXAMPLES "Build examples of ocppi or not"
-       ${PROJECT_IS_TOP_LEVEL})
-
-option(OCPPI_ENABLE_TESTING "Enable test of ocppi or not"
-       ${PROJECT_IS_TOP_LEVEL})
-
-option(OCPPI_BUILD_SHARED_LIBRARY "Build a shared library or not"
-       ${PROJECT_IS_TOP_LEVEL})
-
-option(OCPPI_INSTALL "Enable install target or not" ${PROJECT_IS_TOP_LEVEL})
+  VERSION 0.3.2)
 
 option(OCPPI_WITH_SPDLOG "Build ocppi with spdlog or not." OFF)
 
-include(./cmake/CPM.cmake)
+set(OCPPI_TL_EXPECTED_VERSION 1.0.0) # debian buster-backports
+list(APPEND OCPPI_DEPENDENCIES PUBLIC
+     "tl-expected ${OCPPI_TL_EXPECTED_VERSION} REQUIRED")
+list(APPEND OCPPI_LINK_LIBRARIES PUBLIC "tl::expected")
+
+set(OCPPI_JSON_VERSION 3.5.0) # debian buster
+list(APPEND OCPPI_DEPENDENCIES PUBLIC
+     "nlohmann_json ${OCPPI_JSON_VERSION} REQUIRED")
+list(APPEND OCPPI_LINK_LIBRARIES PUBLIC "nlohmann_json::nlohmann_json")
+
+if(OCPPI_WITH_SPDLOG)
+  set(OCPPI_SPDLOG_VERSION 1.3.1) # debian buster
+  list(APPEND OCPPI_COMPILE_OPTIONS PUBLIC -DOCPPI_WITH_SPDLOG)
+  list(APPEND OCPPI_LINK_LIBRARIES PUBLIC "spdlog::spdlog")
+endif()
+
+if(CMAKE_VERSION LESS 3.14)
+  message("CPM.cmake disabled")
+else()
+  include(./cmake/CPM.cmake)
+  CPMFindPackage(
+    NAME tl-expected
+    VERSION "${OCPPI_TL_EXPECTED_VERSION}"
+    GITHUB_REPOSITORY TartanLlama/expected
+    GIT_TAG "v1.1.0"
+    GIT_SHALLOW ON
+    OPTIONS "EXPECTED_BUILD_TESTS OFF"
+    EXCLUDE_FROM_ALL ON)
+  CPMFindPackage(
+    NAME nlohmann_json
+    VERSION "${OCPPI_JSON_VERSION}"
+    URL "https://github.com/nlohmann/json/archive/refs/tags/v3.5.0.tar.gz"
+    EXCLUDE_FROM_ALL ON)
+  if(OCPPI_WITH_SPDLOG)
+    CPMFindPackage(
+      NAME spdlog
+      VERSION ${OCPPI_SPDLOG_VERSION}
+      GITHUB_REPOSITORY "gabime/spdlog"
+      GIT_TAG "v1.3.1"
+      GIT_SHALLOW ON
+      EXCLUDE_FROM_ALL ON
+      OPTIONS
+        "CMAKE_POSITION_INDEPENDENT_CODE ON" # NOTE:
+                                             # https://github.com/gabime/spdlog/issues/1190
+    )
+  endif()
+endif()
+
+find_package(
+  tl-expected ${OCPPI_TL_EXPECTED_VERSION} REQUIRED)
 
-set(OCPPI_TL_EXPECTED_MINIMAL_VERSION 1.0.0)
-CPMFindPackage(
-  NAME expected
-  VERSION "${OCPPI_TL_EXPECTED_MINIMAL_VERSION}"
-  GITHUB_REPOSITORY TartanLlama/expected
-  GIT_TAG v1.1.0
-  GIT_SHALLOW ON
-  OPTIONS "EXPECTED_BUILD_TESTS OFF"
-  FIND_PACKAGE_ARGUMENTS "NAMES tl-expected"
-  EXCLUDE_FROM_ALL ON)
 if(NOT TARGET tl::expected)
-  # NOTE: v1.0.0 version of tl::expected doesn't have a namespaced alias so we
-  # have to add it here.
+  # NOTE: v1.0.0 version of tl::expected doesn't have a namespaced alias when
+  # using with add_subdirectory so we have to add it here.
   add_library(tl::expected ALIAS expected)
 endif()
-list(APPEND OCPPI_LINK_LIBRARIES PUBLIC tl::expected)
 
-set(OCPPI_JSON_MINIMAL_VERSION 3.5.0) # debian buster
-CPMFindPackage(
-  NAME nlohmann_json
-  VERSION "${OCPPI_JSON_MINIMAL_VERSION}"
-  URL "https://github.com/nlohmann/json/archive/refs/tags/v3.5.0.tar.gz"
-  EXCLUDE_FROM_ALL ON)
-list(APPEND OCPPI_LINK_LIBRARIES PUBLIC nlohmann_json::nlohmann_json)
+find_package(
+  nlohmann_json ${OCPPI_JSON_VERSION} QUIET)
 
-set(OCPPI_SPDLOG_MINIMAL_VERSION 1.3.1) # debian buster
-if(OCPPI_WITH_SPDLOG)
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DOCPPI_WITH_SPDLOG")
-  CPMFindPackage(
-    NAME spdlog
-    VERSION ${OCPPI_SPDLOG_MINIMAL_VERSION}
-    GITHUB_REPOSITORY "gabime/spdlog"
-    GIT_TAG "v1.3.1"
-    GIT_SHALLOW ON
-    EXCLUDE_FROM_ALL ON
-    OPTIONS
-      "CMAKE_POSITION_INDEPENDENT_CODE ON" # NOTE:
-                                           # https://github.com/gabime/spdlog/issues/1190
-  )
-  list(APPEND OCPPI_LINK_LIBRARIES PRIVATE spdlog::spdlog)
+if(NOT nlohmann_json_FOUND)
+  # NOTE: v3.5.0 version of nlohmann_json doesn't have a cmake config file in
+  # debian, so we have to fix this manually.
+  list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake.fix)
+  find_package(nlohmann_json ${OCPPI_JSON_VERSION} REQUIRED)
 endif()
 
 include(./cmake/GitSemver.cmake)
@@ -73,166 +85,163 @@ set(OCPPI_LIBRARY_TYPE "STATIC")
 if(OCPPI_BUILD_SHARED_LIBRARY)
   set(OCPPI_LIBRARY_TYPE "SHARED")
 endif()
-set(OCPPI_SOVERSION 0)
 
 include(./cmake/PFL.cmake)
 
-pfl_init(ENABLE_TESTING ${OCPPI_ENABLE_TESTING} BUILD_EXAMPLES
-         ${OCPPI_BUILD_EXAMPLES} INSTALL ${OCPPI_INSTALL})
+pfl_init(AUTO)
 
 pfl_add_library(
-  SOVERSION
-  ${OCPPI_SOVERSION}
-  VERSION
-  ${PROJECT_VERSION}
-  TYPE
-  ${OCPPI_LIBRARY_TYPE}
-  INS
-  include/ocppi/configure.hpp.in
-  include/ocppi/runtime/configure.hpp.in
-  SOURCES
-  # find -regex '\.\/src\/.*\.\(h\|c\)pp' | sort
-  ./src/ocppi/cli/CLI.cpp
-  ./src/ocppi/cli/CommandFailedError.cpp
-  ./src/ocppi/cli/CommonCLI.cpp
-  ./src/ocppi/cli/crun/Crun.cpp
-  ./src/ocppi/cli/ExecutableNotFoundError.cpp
-  ./src/ocppi/cli/Process.cpp
-  ./src/ocppi/cli/Process.hpp
-  ./src/ocppi/cli/runc/Runc.cpp
-  ./src/ocppi/cli/youki/Youki.cpp
-  ./src/ocppi/configure.cpp
-  ./src/ocppi/InvalidArgumentError.cpp
-  ./src/ocppi/runtime/configure.cpp
-  ./src/ocppi/runtime/ContainerID.cpp
-  ./src/ocppi/runtime/CreateOption.cpp
-  ./src/ocppi/runtime/DeleteOption.cpp
-  ./src/ocppi/runtime/FeaturesOption.cpp
-  ./src/ocppi/runtime/GlobalOption.cpp
-  ./src/ocppi/runtime/KillOption.cpp
-  ./src/ocppi/runtime/RunOption.cpp
-  ./src/ocppi/runtime/Runtime.cpp
-  ./src/ocppi/runtime/Signal.cpp
-  ./src/ocppi/runtime/StartOption.cpp
-  ./src/ocppi/runtime/StateOption.cpp
-  HEADERS
-  # find -regex '\.\/include\/.*\.hpp' | sort
-  ./include/ocppi/cli/CLI.hpp
-  ./include/ocppi/cli/CommandFailedError.hpp
-  ./include/ocppi/cli/CommonCLI.hpp
-  ./include/ocppi/cli/crun/Crun.hpp
-  ./include/ocppi/cli/ExecutableNotFoundError.hpp
-  ./include/ocppi/cli/runc/Runc.hpp
-  ./include/ocppi/cli/youki/Youki.hpp
-  ./include/ocppi/InvalidArgumentError.hpp
-  ./include/ocppi/runtime/config/types/Anet.hpp
-  ./include/ocppi/runtime/config/types/BlockIODeviceThrottle.hpp
-  ./include/ocppi/runtime/config/types/BlockIODeviceWeight.hpp
-  ./include/ocppi/runtime/config/types/BlockIO.hpp
-  ./include/ocppi/runtime/config/types/BoottimeClass.hpp
-  ./include/ocppi/runtime/config/types/Capabilities.hpp
-  ./include/ocppi/runtime/config/types/CappedCPU.hpp
-  ./include/ocppi/runtime/config/types/CappedMemory.hpp
-  ./include/ocppi/runtime/config/types/Class.hpp
-  ./include/ocppi/runtime/config/types/Config.hpp
-  ./include/ocppi/runtime/config/types/ConsoleSize.hpp
-  ./include/ocppi/runtime/config/types/DeviceCgroup.hpp
-  ./include/ocppi/runtime/config/types/FluffyCPU.hpp
-  ./include/ocppi/runtime/config/types/FluffyMemory.hpp
-  ./include/ocppi/runtime/config/types/Generators.hpp
-  ./include/ocppi/runtime/config/types/helper.hpp
-  ./include/ocppi/runtime/config/types/Hook.hpp
-  ./include/ocppi/runtime/config/types/Hooks.hpp
-  ./include/ocppi/runtime/config/types/HugepageLimit.hpp
-  ./include/ocppi/runtime/config/types/Hyperv.hpp
-  ./include/ocppi/runtime/config/types/Hypervisor.hpp
-  ./include/ocppi/runtime/config/types/IdMapping.hpp
-  ./include/ocppi/runtime/config/types/IdType.hpp
-  ./include/ocppi/runtime/config/types/Image.hpp
-  ./include/ocppi/runtime/config/types/IntelRdt.hpp
-  ./include/ocppi/runtime/config/types/IoPriority.hpp
-  ./include/ocppi/runtime/config/types/Kernel.hpp
-  ./include/ocppi/runtime/config/types/LinuxDevice.hpp
-  ./include/ocppi/runtime/config/types/Linux.hpp
-  ./include/ocppi/runtime/config/types/LinuxResources.hpp
-  ./include/ocppi/runtime/config/types/Mount.hpp
-  ./include/ocppi/runtime/config/types/NamespaceReference.hpp
-  ./include/ocppi/runtime/config/types/NamespaceType.hpp
-  ./include/ocppi/runtime/config/types/NetworkInterfacePriority.hpp
-  ./include/ocppi/runtime/config/types/PersonalityDomain.hpp
-  ./include/ocppi/runtime/config/types/Personality.hpp
-  ./include/ocppi/runtime/config/types/Pids.hpp
-  ./include/ocppi/runtime/config/types/Process.hpp
-  ./include/ocppi/runtime/config/types/PurpleCPU.hpp
-  ./include/ocppi/runtime/config/types/PurpleMemory.hpp
-  ./include/ocppi/runtime/config/types/Rdma.hpp
-  ./include/ocppi/runtime/config/types/ResourcesNetwork.hpp
-  ./include/ocppi/runtime/config/types/Rlimit.hpp
-  ./include/ocppi/runtime/config/types/RootfsPropagation.hpp
-  ./include/ocppi/runtime/config/types/Root.hpp
-  ./include/ocppi/runtime/config/types/RootImageFormat.hpp
-  ./include/ocppi/runtime/config/types/SchedulerFlag.hpp
-  ./include/ocppi/runtime/config/types/Scheduler.hpp
-  ./include/ocppi/runtime/config/types/SchedulerPolicy.hpp
-  ./include/ocppi/runtime/config/types/SeccompAction.hpp
-  ./include/ocppi/runtime/config/types/SeccompArch.hpp
-  ./include/ocppi/runtime/config/types/SeccompFlag.hpp
-  ./include/ocppi/runtime/config/types/Seccomp.hpp
-  ./include/ocppi/runtime/config/types/SeccompOperators.hpp
-  ./include/ocppi/runtime/config/types/Solaris.hpp
-  ./include/ocppi/runtime/config/types/Storage.hpp
-  ./include/ocppi/runtime/config/types/SyscallArg.hpp
-  ./include/ocppi/runtime/config/types/Syscall.hpp
-  ./include/ocppi/runtime/config/types/TimeOffsets.hpp
-  ./include/ocppi/runtime/config/types/User.hpp
-  ./include/ocppi/runtime/config/types/Vm.hpp
-  ./include/ocppi/runtime/config/types/WindowsDevice.hpp
-  ./include/ocppi/runtime/config/types/Windows.hpp
-  ./include/ocppi/runtime/config/types/WindowsNetwork.hpp
-  ./include/ocppi/runtime/config/types/WindowsResources.hpp
-  ./include/ocppi/runtime/config/types/ZosDevice.hpp
-  ./include/ocppi/runtime/config/types/Zos.hpp
-  ./include/ocppi/runtime/ContainerID.hpp
-  ./include/ocppi/runtime/CreateOption.hpp
-  ./include/ocppi/runtime/DeleteOption.hpp
-  ./include/ocppi/runtime/ExecOption.hpp
-  ./include/ocppi/runtime/FeaturesOption.hpp
-  ./include/ocppi/runtime/features/types/Apparmor.hpp
-  ./include/ocppi/runtime/features/types/Cgroup.hpp
-  ./include/ocppi/runtime/features/types/Features.hpp
-  ./include/ocppi/runtime/features/types/Generators.hpp
-  ./include/ocppi/runtime/features/types/helper.hpp
-  ./include/ocppi/runtime/features/types/IntelRdt.hpp
-  ./include/ocppi/runtime/features/types/Linux.hpp
-  ./include/ocppi/runtime/features/types/NamespaceType.hpp
-  ./include/ocppi/runtime/features/types/SeccompAction.hpp
-  ./include/ocppi/runtime/features/types/SeccompArch.hpp
-  ./include/ocppi/runtime/features/types/SeccompFlag.hpp
-  ./include/ocppi/runtime/features/types/Seccomp.hpp
-  ./include/ocppi/runtime/features/types/SeccompOperators.hpp
-  ./include/ocppi/runtime/features/types/Selinux.hpp
-  ./include/ocppi/runtime/GlobalOption.hpp
-  ./include/ocppi/runtime/KillOption.hpp
-  ./include/ocppi/runtime/ListOption.hpp
-  ./include/ocppi/runtime/RunOption.hpp
-  ./include/ocppi/runtime/Runtime.hpp
-  ./include/ocppi/runtime/Signal.hpp
-  ./include/ocppi/runtime/SpecRuntime.hpp
-  ./include/ocppi/runtime/StartOption.hpp
-  ./include/ocppi/runtime/StateOption.hpp
-  ./include/ocppi/runtime/state/types/Generators.hpp
-  ./include/ocppi/runtime/state/types/helper.hpp
-  ./include/ocppi/runtime/state/types/State.hpp
-  ./include/ocppi/runtime/state/types/Status.hpp
-  ./include/ocppi/types/ContainerListItem.hpp
-  ./include/ocppi/types/Generators.hpp
-  ./include/ocppi/types/helper.hpp
+  OUTPUT_NAME
+  ocppi
   EXAMPLES
   parse-config
   using-crun
   with-logger
   LINK_LIBRARIES
   ${OCPPI_LINK_LIBRARIES}
+  PUBLIC
+  stdc++fs
   COMPILE_FEATURES
   PUBLIC
-  cxx_std_17)
+  cxx_std_17
+  COMPILE_OPTIONS
+  ${OCPPI_COMPILE_OPTIONS}
+  DEPENDENCIES
+  ${OCPPI_DEPENDENCIES}
+  SOURCES
+  # find -regex '\./src/.+\.[ch]\(pp\)?(\.in)?' -type f -printf '%P\n'| sort
+  include/ocppi/cli/CLI.hpp
+  include/ocppi/cli/CommandFailedError.hpp
+  include/ocppi/cli/CommonCLI.hpp
+  include/ocppi/cli/crun/Crun.hpp
+  include/ocppi/cli/ExecutableNotFoundError.hpp
+  include/ocppi/cli/runc/Runc.hpp
+  include/ocppi/cli/youki/Youki.hpp
+  include/ocppi/configure.hpp.in
+  include/ocppi/InvalidArgumentError.hpp
+  include/ocppi/runtime/config/types/Anet.hpp
+  include/ocppi/runtime/config/types/BlockIODeviceThrottle.hpp
+  include/ocppi/runtime/config/types/BlockIODeviceWeight.hpp
+  include/ocppi/runtime/config/types/BlockIO.hpp
+  include/ocppi/runtime/config/types/BoottimeClass.hpp
+  include/ocppi/runtime/config/types/Capabilities.hpp
+  include/ocppi/runtime/config/types/CappedCPU.hpp
+  include/ocppi/runtime/config/types/CappedMemory.hpp
+  include/ocppi/runtime/config/types/Class.hpp
+  include/ocppi/runtime/config/types/Config.hpp
+  include/ocppi/runtime/config/types/ConsoleSize.hpp
+  include/ocppi/runtime/config/types/DeviceCgroup.hpp
+  include/ocppi/runtime/config/types/FluffyCPU.hpp
+  include/ocppi/runtime/config/types/FluffyMemory.hpp
+  include/ocppi/runtime/config/types/Generators.hpp
+  include/ocppi/runtime/config/types/helper.hpp
+  include/ocppi/runtime/config/types/Hook.hpp
+  include/ocppi/runtime/config/types/Hooks.hpp
+  include/ocppi/runtime/config/types/HugepageLimit.hpp
+  include/ocppi/runtime/config/types/Hyperv.hpp
+  include/ocppi/runtime/config/types/Hypervisor.hpp
+  include/ocppi/runtime/config/types/IdMapping.hpp
+  include/ocppi/runtime/config/types/IdType.hpp
+  include/ocppi/runtime/config/types/Image.hpp
+  include/ocppi/runtime/config/types/IntelRdt.hpp
+  include/ocppi/runtime/config/types/IoPriority.hpp
+  include/ocppi/runtime/config/types/Kernel.hpp
+  include/ocppi/runtime/config/types/LinuxDevice.hpp
+  include/ocppi/runtime/config/types/Linux.hpp
+  include/ocppi/runtime/config/types/LinuxResources.hpp
+  include/ocppi/runtime/config/types/Mount.hpp
+  include/ocppi/runtime/config/types/NamespaceReference.hpp
+  include/ocppi/runtime/config/types/NamespaceType.hpp
+  include/ocppi/runtime/config/types/NetworkInterfacePriority.hpp
+  include/ocppi/runtime/config/types/PersonalityDomain.hpp
+  include/ocppi/runtime/config/types/Personality.hpp
+  include/ocppi/runtime/config/types/Pids.hpp
+  include/ocppi/runtime/config/types/Process.hpp
+  include/ocppi/runtime/config/types/PurpleCPU.hpp
+  include/ocppi/runtime/config/types/PurpleMemory.hpp
+  include/ocppi/runtime/config/types/Rdma.hpp
+  include/ocppi/runtime/config/types/ResourcesNetwork.hpp
+  include/ocppi/runtime/config/types/Rlimit.hpp
+  include/ocppi/runtime/config/types/RootfsPropagation.hpp
+  include/ocppi/runtime/config/types/Root.hpp
+  include/ocppi/runtime/config/types/RootImageFormat.hpp
+  include/ocppi/runtime/config/types/SchedulerFlag.hpp
+  include/ocppi/runtime/config/types/Scheduler.hpp
+  include/ocppi/runtime/config/types/SchedulerPolicy.hpp
+  include/ocppi/runtime/config/types/SeccompAction.hpp
+  include/ocppi/runtime/config/types/SeccompArch.hpp
+  include/ocppi/runtime/config/types/SeccompFlag.hpp
+  include/ocppi/runtime/config/types/Seccomp.hpp
+  include/ocppi/runtime/config/types/SeccompOperators.hpp
+  include/ocppi/runtime/config/types/Solaris.hpp
+  include/ocppi/runtime/config/types/Storage.hpp
+  include/ocppi/runtime/config/types/SyscallArg.hpp
+  include/ocppi/runtime/config/types/Syscall.hpp
+  include/ocppi/runtime/config/types/TimeOffsets.hpp
+  include/ocppi/runtime/config/types/User.hpp
+  include/ocppi/runtime/config/types/Vm.hpp
+  include/ocppi/runtime/config/types/WindowsDevice.hpp
+  include/ocppi/runtime/config/types/Windows.hpp
+  include/ocppi/runtime/config/types/WindowsNetwork.hpp
+  include/ocppi/runtime/config/types/WindowsResources.hpp
+  include/ocppi/runtime/config/types/ZosDevice.hpp
+  include/ocppi/runtime/config/types/Zos.hpp
+  include/ocppi/runtime/configure.hpp.in
+  include/ocppi/runtime/ContainerID.hpp
+  include/ocppi/runtime/CreateOption.hpp
+  include/ocppi/runtime/DeleteOption.hpp
+  include/ocppi/runtime/ExecOption.hpp
+  include/ocppi/runtime/FeaturesOption.hpp
+  include/ocppi/runtime/features/types/Apparmor.hpp
+  include/ocppi/runtime/features/types/Cgroup.hpp
+  include/ocppi/runtime/features/types/Features.hpp
+  include/ocppi/runtime/features/types/Generators.hpp
+  include/ocppi/runtime/features/types/helper.hpp
+  include/ocppi/runtime/features/types/IntelRdt.hpp
+  include/ocppi/runtime/features/types/Linux.hpp
+  include/ocppi/runtime/features/types/NamespaceType.hpp
+  include/ocppi/runtime/features/types/SeccompAction.hpp
+  include/ocppi/runtime/features/types/SeccompArch.hpp
+  include/ocppi/runtime/features/types/SeccompFlag.hpp
+  include/ocppi/runtime/features/types/Seccomp.hpp
+  include/ocppi/runtime/features/types/SeccompOperators.hpp
+  include/ocppi/runtime/features/types/Selinux.hpp
+  include/ocppi/runtime/GlobalOption.hpp
+  include/ocppi/runtime/KillOption.hpp
+  include/ocppi/runtime/ListOption.hpp
+  include/ocppi/runtime/RunOption.hpp
+  include/ocppi/runtime/Runtime.hpp
+  include/ocppi/runtime/Signal.hpp
+  include/ocppi/runtime/SpecRuntime.hpp
+  include/ocppi/runtime/StartOption.hpp
+  include/ocppi/runtime/StateOption.hpp
+  include/ocppi/runtime/state/types/Generators.hpp
+  include/ocppi/runtime/state/types/helper.hpp
+  include/ocppi/runtime/state/types/State.hpp
+  include/ocppi/runtime/state/types/Status.hpp
+  include/ocppi/types/ContainerListItem.hpp
+  include/ocppi/types/Generators.hpp
+  include/ocppi/types/helper.hpp
+  src/ocppi/cli/CLI.cpp
+  src/ocppi/cli/CommandFailedError.cpp
+  src/ocppi/cli/CommonCLI.cpp
+  src/ocppi/cli/crun/Crun.cpp
+  src/ocppi/cli/ExecutableNotFoundError.cpp
+  src/ocppi/cli/Process.cpp
+  src/ocppi/cli/Process.hpp
+  src/ocppi/cli/runc/Runc.cpp
+  src/ocppi/cli/youki/Youki.cpp
+  src/ocppi/configure.cpp
+  src/ocppi/InvalidArgumentError.cpp
+  src/ocppi/runtime/configure.cpp
+  src/ocppi/runtime/ContainerID.cpp
+  src/ocppi/runtime/CreateOption.cpp
+  src/ocppi/runtime/DeleteOption.cpp
+  src/ocppi/runtime/FeaturesOption.cpp
+  src/ocppi/runtime/GlobalOption.cpp
+  src/ocppi/runtime/KillOption.cpp
+  src/ocppi/runtime/RunOption.cpp
+  src/ocppi/runtime/Runtime.cpp
+  src/ocppi/runtime/Signal.cpp
+  src/ocppi/runtime/StartOption.cpp
+  src/ocppi/runtime/StateOption.cpp)

cmake.fix/Findnlohmann_json.cmake

@@ -0,0 +1,13 @@
+try_compile(
+  nlohmann_json_FOUND ${CMAKE_CURRENT_BINARY_DIR}/nlohmann_json_compile_test
+  ${CMAKE_CURRENT_LIST_DIR}/nlohmann_json_compile_test.cpp)
+
+if(NOT nlohmann_json_FOUND)
+  return()
+endif()
+
+if(NOT TARGET nlohmann_json::nlohmann_json)
+  add_library(nlohmann_json INTERFACE)
+  add_library(nlohmann_json::nlohmann_json ALIAS nlohmann_json)
+  install(TARGETS nlohmann_json EXPORT "${PROJECT_NAME}")
+endif()

cmake.fix/nlohmann_json_compile_test.cpp

@@ -0,0 +1,18 @@
+#include "nlohmann/json.hpp"
+
+// NOTE: This cpp file is used by Findnlohmann_json.cmake to check
+// whether the nlohmann_json library we founded at include directory
+// is compatible with 3.5.0 or not.
+
+#if NLOHMANN_JSON_VERSION_MAJOR != 3
+#error require nlohmann_json compatible with 3.5.0
+#endif
+
+#if NLOHMANN_JSON_VERSION_MINOR < 5
+#error require nlohmann_json compatible with 3.5.0
+#endif
+
+int main()
+{
+        return 0;
+}

cmake/CPM.cmake

@@ -42,7 +42,7 @@ if(NOT COMMAND cpm_message)
   endfunction()
 endif()
 
-set(CURRENT_CPM_VERSION 0.38.7)
+set(CURRENT_CPM_VERSION 0.38.8)
 
 get_filename_component(CPM_CURRENT_DIRECTORY "${CMAKE_CURRENT_LIST_DIR}" REALPATH)
 if(CPM_DIRECTORY)
@@ -300,12 +300,6 @@ function(CPMFindPackage)
     return()
   endif()
 
-  cpm_check_if_package_already_added(${CPM_ARGS_NAME} "${CPM_ARGS_VERSION}")
-  if(CPM_PACKAGE_ALREADY_ADDED)
-    cpm_export_variables(${CPM_ARGS_NAME})
-    return()
-  endif()
-
   cpm_find_package(${CPM_ARGS_NAME} "${CPM_ARGS_VERSION}" ${CPM_ARGS_FIND_PACKAGE_ARGUMENTS})
 
   if(NOT CPM_PACKAGE_FOUND)

cmake/GitSemver.cmake

@@ -16,11 +16,24 @@ function(gitsemver_message)
   message(STATUS "GitSemver: " ${ARGN})
 endfunction()
 
-message(STATUS "GitSemver: --==Version: v0.1.2==--")
+message(STATUS "GitSemver: --==Version: v0.1.4==--")
 
 # GitSemver will write the result to varname if it successfully get version
 # string from git repository.
 function(GitSemver varname)
+  if(CMAKE_VERSION VERSION_LESS 3.21)
+    # https://www.scivision.dev/cmake-project-is-top-level/
+    get_property(
+      not_top
+      DIRECTORY
+      PROPERTY PARENT_DIRECTORY)
+    if(NOT not_top)
+      set(PROJECT_IS_TOP_LEVEL true)
+    else()
+      set(PROJECT_IS_TOP_LEVEL false)
+    endif()
+  endif()
+
   if(NOT PROJECT_IS_TOP_LEVEL)
     return()
   endif()
@@ -45,7 +58,7 @@ function(GitSemver varname)
     COMMAND ${SED_EXECUTABLE} -e s/^v//
     COMMAND ${SED_EXECUTABLE} -e s/+\$//
     OUTPUT_VARIABLE ${varname} RESULTS_VARIABLE rets
-    OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_QUIET COMMAND_ECHO STDOUT)
+    OUTPUT_STRIP_TRAILING_WHITESPACE ERROR_QUIET)
 
   foreach(ret ${rets})
     if(NOT ret EQUAL 0)

examples/parse-config/CMakeLists.txt

@@ -1,2 +1,9 @@
-pfl_add_executable(INTERNAL SOURCES ./src/main.cpp LINK_LIBRARIES PUBLIC
-                   ocppi::ocppi)
+pfl_add_executable(
+  OUTPUT_NAME
+  parse-config
+  DISABLE_INSTALL
+  SOURCES
+  ./src/main.cpp
+  LINK_LIBRARIES
+  PUBLIC
+  ocppi::ocppi)

examples/using-crun/CMakeLists.txt

@@ -4,5 +4,11 @@ if(OCPPI_WITH_SPDLOG)
   list(APPEND LINK_LIBRARIES PRIVATE spdlog::spdlog)
 endif()
 
-pfl_add_executable(INTERNAL SOURCES src/main.cpp LINK_LIBRARIES
-                   ${LINK_LIBRARIES})
+pfl_add_executable(
+  OUTPUT_NAME
+  using-crun
+  DISABLE_INSTALL
+  SOURCES
+  src/main.cpp
+  LINK_LIBRARIES
+  ${LINK_LIBRARIES})

examples/with-logger/CMakeLists.txt

@@ -3,7 +3,9 @@ if(NOT OCPPI_WITH_SPDLOG)
 endif()
 
 pfl_add_executable(
-  INTERNAL
+  OUTPUT_NAME
+  with-logger
+  DISABLE_INSTALL
   SOURCES
   src/main.cpp
   LINK_LIBRARIES

include/ocppi/cli/CommonCLI.hpp

@@ -31,7 +31,6 @@ struct DeleteOption;
 struct ExecOption;
 struct KillOption;
 struct ListOption;
-class Signal;
 struct StartOption;
 struct StateOption;
 struct GlobalOption;

include/ocppi/runtime/Signal.hpp

@@ -2,11 +2,7 @@
 
 #include <string>
 
-namespace ocppi::runtime
-{
-
-class Signal : public std::string {
-        using std::string::string;
-};
+namespace ocppi::runtime {
 
+using Signal = std::string;
 }

include/ocppi/runtime/SpecRuntime.hpp

@@ -10,6 +10,7 @@
 #include "ocppi/runtime/DeleteOption.hpp"
 #include "ocppi/runtime/FeaturesOption.hpp"
 #include "ocppi/runtime/KillOption.hpp"
+#include "ocppi/runtime/Signal.hpp"
 #include "ocppi/runtime/StartOption.hpp"
 #include "ocppi/runtime/StateOption.hpp"
 #include "ocppi/runtime/features/types/Features.hpp"
@@ -24,8 +25,6 @@ namespace state::types
 struct State;
 }
 
-class Signal;
-
 class SpecRuntime {
     public:
         SpecRuntime() = default;