ExternalProject: Add option to perform a shallow Git clone (#15291)
Inspired-by: Ilya Kulakov <kulakov.ilya@gmail.com>
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@ -0,0 +1,5 @@
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ExternalProject-git-clone-shallow
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---------------------------------
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* The :module:`ExternalProject` module leared the ``GIT_SHALLOW 1``
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option to perform a shallow clone of a Git repository.
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@ -61,6 +61,10 @@ Create custom targets to build projects in external trees
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The optional name of the remote, default to ``origin``
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``GIT_SUBMODULES <module>...``
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Git submodules that shall be updated, all if empty
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``GIT_SHALLOW 1``
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Tell Git to clone with ``--depth 1``. Use when ``GIT_TAG`` is not
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specified or when it names a branch in order to download only the
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tip of the branch without the rest of its history.
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``HG_REPOSITORY <url>``
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URL of mercurial repo
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``HG_TAG <tag>``
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@ -499,7 +503,12 @@ define_property(DIRECTORY PROPERTY "EP_UPDATE_DISCONNECTED" INHERITED
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"ExternalProject module."
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)
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function(_ep_write_gitclone_script script_filename source_dir git_EXECUTABLE git_repository git_tag git_remote_name git_submodules src_name work_dir gitclone_infofile gitclone_stampfile tls_verify)
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function(_ep_write_gitclone_script script_filename source_dir git_EXECUTABLE git_repository git_tag git_remote_name git_submodules git_shallow src_name work_dir gitclone_infofile gitclone_stampfile tls_verify)
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if(NOT GIT_VERSION_STRING VERSION_LESS 1.7.10)
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set(git_clone_shallow_options "--depth 1 --no-single-branch")
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else()
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set(git_clone_shallow_options "--depth 1")
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endif()
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file(WRITE ${script_filename}
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"if(\"${git_tag}\" STREQUAL \"\")
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message(FATAL_ERROR \"Tag for git checkout should not be empty.\")
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@ -533,12 +542,19 @@ if(NOT \"x${tls_verify}\" STREQUAL \"x\" AND NOT tls_verify)
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-c http.sslVerify=false)
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endif()
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set(git_clone_options)
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set(git_shallow \"${git_shallow}\")
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if(git_shallow)
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list(APPEND git_clone_options ${git_clone_shallow_options})
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endif()
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# try the clone 3 times incase there is an odd git clone issue
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set(error_code 1)
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set(number_of_tries 0)
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while(error_code AND number_of_tries LESS 3)
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execute_process(
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COMMAND \"${git_EXECUTABLE}\" \${git_options} clone --origin \"${git_remote_name}\" \"${git_repository}\" \"${src_name}\"
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COMMAND \"${git_EXECUTABLE}\" \${git_options} clone \${git_clone_options} --origin \"${git_remote_name}\" \"${git_repository}\" \"${src_name}\"
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WORKING_DIRECTORY \"${work_dir}\"
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RESULT_VARIABLE error_code
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)
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@ -1793,6 +1809,7 @@ function(_ep_add_download_command name)
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if("x${tls_verify}" STREQUAL "x" AND DEFINED CMAKE_TLS_VERIFY)
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set(tls_verify "${CMAKE_TLS_VERIFY}")
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endif()
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get_property(git_shallow TARGET ${name} PROPERTY _EP_GIT_SHALLOW)
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# For the download step, and the git clone operation, only the repository
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# should be recorded in a configured RepositoryInfo file. If the repo
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@ -1817,7 +1834,7 @@ function(_ep_add_download_command name)
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# The script will delete the source directory and then call git clone.
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#
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_ep_write_gitclone_script(${tmp_dir}/${name}-gitclone.cmake ${source_dir}
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${GIT_EXECUTABLE} ${git_repository} ${git_tag} ${git_remote_name} "${git_submodules}" ${src_name} ${work_dir}
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${GIT_EXECUTABLE} ${git_repository} ${git_tag} ${git_remote_name} "${git_submodules}" "${git_shallow}" ${src_name} ${work_dir}
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${stamp_dir}/${name}-gitinfo.txt ${stamp_dir}/${name}-gitclone-lastrun.txt "${tls_verify}"
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)
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set(comment "Performing download step (git clone) for '${name}'")
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@ -349,6 +349,20 @@ if(do_git_tests)
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)
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set_property(TARGET ${proj} PROPERTY FOLDER "GIT")
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# Live git / master (no GIT_TAG), but shallow
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#
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set(proj TutorialStep1-GIT-shallow-master)
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ExternalProject_Add(${proj}
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GIT_REPOSITORY "${local_git_repo}"
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GIT_SHALLOW 1
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CMAKE_GENERATOR "${CMAKE_GENERATOR}"
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CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
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INSTALL_COMMAND ""
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DEPENDS "SetupLocalGITRepository"
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LOG_UPDATE 1
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)
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set_property(TARGET ${proj} PROPERTY FOLDER "GIT")
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# git by explicit branch/tag with empty submodule list
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#
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set(proj TutorialStep1-GIT-bytag-withsubmodules)
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@ -543,6 +557,9 @@ if(do_git_tests)
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add_test(TutorialStep1-GIT-bytag
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"${binary_base}/TutorialStep1-GIT-bytag/Tutorial" 99)
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add_test(TutorialStep1-GIT-shallow-master
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"${binary_base}/TutorialStep1-GIT-shallow-master/Tutorial" 98)
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add_test(TutorialStep1-GIT-master
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"${binary_base}/TutorialStep1-GIT-master/Tutorial" 98)
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endif()
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