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# Adds version control information to the variable VERS. For
# determining the Version Control System used (if any) it inspects the
# existence of certain subdirectories under SOURCE_DIR (if provided as an
# extra argument, otherwise uses CMAKE_CURRENT_SOURCE_DIR).
function(get_source_info path revision repository)
find_package(Git QUIET)
if(GIT_FOUND)
execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse --git-dir
WORKING_DIRECTORY ${path}
RESULT_VARIABLE git_result
OUTPUT_VARIABLE git_output
ERROR_QUIET)
if(git_result EQUAL 0)
string(STRIP "${git_output}" git_output)
get_filename_component(git_dir ${git_output} ABSOLUTE BASE_DIR ${path})
execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse HEAD
WORKING_DIRECTORY ${path}
RESULT_VARIABLE git_result
OUTPUT_VARIABLE git_output)
if(git_result EQUAL 0)
string(STRIP "${git_output}" git_output)
set(${revision} ${git_output} PARENT_SCOPE)
endif()
execute_process(COMMAND ${GIT_EXECUTABLE} rev-parse --abbrev-ref --symbolic-full-name @{upstream}
WORKING_DIRECTORY ${path}
RESULT_VARIABLE git_result
OUTPUT_VARIABLE git_output
ERROR_QUIET)
if(git_result EQUAL 0)
string(REPLACE "/" ";" branch ${git_output})
list(GET branch 0 remote)
else()
set(remote "origin")
endif()
execute_process(COMMAND ${GIT_EXECUTABLE} remote get-url ${remote}
WORKING_DIRECTORY ${path}
RESULT_VARIABLE git_result
OUTPUT_VARIABLE git_output
ERROR_QUIET)
if(git_result EQUAL 0)
# Passwords or tokens should not be stored in the remote URL at the
# risk of being leaked. In case we find one, error out and teach the
# user the best practices.
string(REGEX MATCH "https?://[^/]*:[^/]*@.*"
http_password "${git_output}")
if(http_password)
message(SEND_ERROR "The git remote repository URL has an embedded \
password. Remove the password from the URL or use \
`-DLLVM_FORCE_VC_REPOSITORY=<URL without password>` in order to avoid \
leaking your password (see https://git-scm.com/docs/gitcredentials for \
alternatives).")
endif()
# GitHub token formats are described at:
# https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/about-authentication-to-github#githubs-token-formats
string(REGEX MATCH
"https?://(gh[pousr]|github_pat)_[^/]+@github.com.*"
github_token "${git_output}")
if(github_token)
message(SEND_ERROR "The git remote repository URL has an embedded \
GitHub Token. Remove the token from the URL or use \
`-DLLVM_FORCE_VC_REPOSITORY=<URL without token>` in order to avoid leaking \
your token (see https://git-scm.com/docs/gitcredentials for alternatives).")
endif()
string(STRIP "${git_output}" git_output)
set(${repository} ${git_output} PARENT_SCOPE)
else()
set(${repository} ${path} PARENT_SCOPE)
endif()
endif()
else()
message(WARNING "Git not found. Version cannot be determined.")
endif()
endfunction()
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