diff options
Diffstat (limited to 'Modules/FindGit.cmake')
| -rw-r--r-- | Modules/FindGit.cmake | 44 |
1 files changed, 37 insertions, 7 deletions
diff --git a/Modules/FindGit.cmake b/Modules/FindGit.cmake index f8346b61d0..83da707b74 100644 --- a/Modules/FindGit.cmake +++ b/Modules/FindGit.cmake @@ -77,14 +77,44 @@ unset(git_names) unset(_git_sourcetree_path) if(GIT_EXECUTABLE) - execute_process(COMMAND ${GIT_EXECUTABLE} --version - OUTPUT_VARIABLE git_version - ERROR_QUIET - OUTPUT_STRIP_TRAILING_WHITESPACE) - if (git_version MATCHES "^git version [0-9]") - string(REPLACE "git version " "" GIT_VERSION_STRING "${git_version}") + # Avoid querying the version if we've already done that this run. For + # projects that use things like ExternalProject or FetchContent heavily, + # this saving can be measurable on some platforms. + set(__doGitVersionCheck YES) + if(DEFINED GIT_VERSION_STRING) + # This is an internal property, projects must not try to use it. + # We don't want this stored in the cache because it might still change + # between CMake runs, but it shouldn't change during a run. + get_property(__gitVersionProp GLOBAL + PROPERTY _CMAKE_FindGit_GIT_EXECUTABLE_VERSION + ) + if(__gitVersionProp) + list(GET __gitVersionProp 0 __gitExe) + list(GET __gitVersionProp 1 __gitVersion) + if("${__gitExe}" STREQUAL "${GIT_EXECUTABLE}" AND + "${__gitVersion}" STREQUAL "${GIT_VERSION_STRING}") + set(__doGitVersionCheck NO) + endif() + endif() + unset(__gitVersionProp) + unset(__gitExe) + unset(__gitVersion) + endif() + + if(__doGitVersionCheck) + execute_process(COMMAND ${GIT_EXECUTABLE} --version + OUTPUT_VARIABLE git_version + ERROR_QUIET + OUTPUT_STRIP_TRAILING_WHITESPACE) + if (git_version MATCHES "^git version [0-9]") + string(REPLACE "git version " "" GIT_VERSION_STRING "${git_version}") + set_property(GLOBAL PROPERTY _CMAKE_FindGit_GIT_EXECUTABLE_VERSION + "${GIT_EXECUTABLE};${GIT_VERSION_STRING}" + ) + endif() + unset(git_version) endif() - unset(git_version) + unset(__doGitVersionCheck) get_property(_findgit_role GLOBAL PROPERTY CMAKE_ROLE) if(_findgit_role STREQUAL "PROJECT" AND NOT TARGET Git::Git) |