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-rw-r--r--Modules/ExternalProject.cmake19
1 files changed, 12 insertions, 7 deletions
diff --git a/Modules/ExternalProject.cmake b/Modules/ExternalProject.cmake
index b42d2dd..b812845 100644
--- a/Modules/ExternalProject.cmake
+++ b/Modules/ExternalProject.cmake
@@ -531,6 +531,15 @@ function(_ep_write_gitclone_script script_filename source_dir git_EXECUTABLE git
else()
set(git_clone_shallow_options "--depth 1")
endif()
+ if(NOT GIT_VERSION_STRING VERSION_LESS 1.8.5)
+ # Use `git checkout <tree-ish> --` to avoid ambiguity with a local path.
+ set(git_checkout_explicit-- "--")
+ else()
+ # Use `git checkout <branch>` even though this risks ambiguity with a
+ # local path. Unfortunately we cannot use `git checkout <tree-ish> --`
+ # because that will not search for remote branch names, a common use case.
+ set(git_checkout_explicit-- "")
+ endif()
file(WRITE ${script_filename}
"if(\"${git_tag}\" STREQUAL \"\")
message(FATAL_ERROR \"Tag for git checkout should not be empty.\")
@@ -600,11 +609,8 @@ if(error_code)
message(FATAL_ERROR \"Failed to clone repository: '${git_repository}'\")
endif()
-# Use `git checkout <branch>` even though this risks ambiguity with a
-# local path. Unfortunately we cannot use `git checkout <tree-ish> --`
-# because that will not search for remote branch names, a common use case.
execute_process(
- COMMAND \"${git_EXECUTABLE}\" \${git_options} checkout ${git_tag}
+ COMMAND \"${git_EXECUTABLE}\" \${git_options} checkout ${git_tag} ${git_checkout_explicit--}
WORKING_DIRECTORY \"${work_dir}/${src_name}\"
RESULT_VARIABLE error_code
)
@@ -1990,11 +1996,10 @@ function(_ep_add_download_command name)
set(comment "Performing download step (${steps}) for '${name}'")
_ep_write_verifyfile_script("${stamp_dir}/verify-${name}.cmake" "${file}" "${hash}")
endif()
- list(APPEND cmd ${CMAKE_COMMAND} -P ${stamp_dir}/verify-${name}.cmake
- COMMAND)
+ list(APPEND cmd ${CMAKE_COMMAND} -P ${stamp_dir}/verify-${name}.cmake)
if (NOT no_extract)
_ep_write_extractfile_script("${stamp_dir}/extract-${name}.cmake" "${name}" "${file}" "${source_dir}")
- list(APPEND cmd ${CMAKE_COMMAND} -P ${stamp_dir}/extract-${name}.cmake)
+ list(APPEND cmd COMMAND ${CMAKE_COMMAND} -P ${stamp_dir}/extract-${name}.cmake)
else ()
set_property(TARGET ${name} PROPERTY _EP_DOWNLOADED_FILE ${file})
endif ()