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Zig Version Override option #25696

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Zig Version Override option #25696

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79 changes: 43 additions & 36 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -40,43 +40,50 @@ project(zig
set(ZIG_VERSION_MAJOR 0)
set(ZIG_VERSION_MINOR 16)
set(ZIG_VERSION_PATCH 0)
set(ZIG_VERSION "" CACHE STRING "Override Zig version string. Default is to find out with git.")

if("${ZIG_VERSION}" STREQUAL "")
set(RESOLVED_ZIG_VERSION "${ZIG_VERSION_MAJOR}.${ZIG_VERSION_MINOR}.${ZIG_VERSION_PATCH}")
find_program(GIT_EXE NAMES git NAMES_PER_DIR)
if(GIT_EXE AND EXISTS "${PROJECT_SOURCE_DIR}/.git")
execute_process(
COMMAND ${GIT_EXE} -C "${PROJECT_SOURCE_DIR}" describe --match *.*.* --tags --abbrev=9
RESULT_VARIABLE EXIT_STATUS
OUTPUT_VARIABLE GIT_DESCRIBE
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
if(EXIT_STATUS EQUAL "0")
set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS "${PROJECT_SOURCE_DIR}/.git/HEAD")
if(GIT_DESCRIBE MATCHES "^v?([0-9]+\\.[0-9]+\\.[0-9]+)$")
# Tagged release version.
set(GIT_TAG ${CMAKE_MATCH_1})
if(NOT GIT_TAG VERSION_EQUAL RESOLVED_ZIG_VERSION)
message(SEND_ERROR "Zig version (${RESOLVED_ZIG_VERSION}) does not match Git tag (${GIT_TAG}).")
endif()
elseif(GIT_DESCRIBE MATCHES "^v?([0-9]+\\.[0-9]+\\.[0-9]+)-([0-9]+)-g(.+)$")
# Untagged pre-release. The Zig version is updated to include the number of commits
# since the last tagged version and the commit hash. The version is formatted in
# accordance with the https://semver.org specification.
set(GIT_TAG ${CMAKE_MATCH_1})
set(GIT_COMMITS_AFTER_TAG ${CMAKE_MATCH_2})
set(GIT_COMMIT ${CMAKE_MATCH_3})
if(NOT RESOLVED_ZIG_VERSION VERSION_GREATER GIT_TAG)
message(SEND_ERROR "Zig version (${RESOLVED_ZIG_VERSION}) must be greater than tagged ancestor (${GIT_TAG}).")
endif()
set(RESOLVED_ZIG_VERSION "${RESOLVED_ZIG_VERSION}-dev.${GIT_COMMITS_AFTER_TAG}+${GIT_COMMIT}")
else()
message(WARNING "Failed to parse version from output of `git describe`.")
endif()
endif()
endif()

option(ZIG_VERSION_OVERRIDE "Override the default handling of Zig version string if using git is not desired" OFF)
if(NOT ZIG_VERSION_OVERRIDE)
set(ZIG_VERSION "" CACHE STRING "Override Zig version string. Default is to find out with git.")

if("${ZIG_VERSION}" STREQUAL "")
set(RESOLVED_ZIG_VERSION "${ZIG_VERSION_MAJOR}.${ZIG_VERSION_MINOR}.${ZIG_VERSION_PATCH}")
find_program(GIT_EXE NAMES git NAMES_PER_DIR)
if(GIT_EXE AND EXISTS "${PROJECT_SOURCE_DIR}/.git")
execute_process(
COMMAND ${GIT_EXE} -C "${PROJECT_SOURCE_DIR}" describe --match *.*.* --tags --abbrev=9
RESULT_VARIABLE EXIT_STATUS
OUTPUT_VARIABLE GIT_DESCRIBE
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
if(EXIT_STATUS EQUAL "0")
set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS "${PROJECT_SOURCE_DIR}/.git/HEAD")
if(GIT_DESCRIBE MATCHES "^v?([0-9]+\\.[0-9]+\\.[0-9]+)$")
# Tagged release version.
set(GIT_TAG ${CMAKE_MATCH_1})
if(NOT GIT_TAG VERSION_EQUAL RESOLVED_ZIG_VERSION)
message(SEND_ERROR "Zig version (${RESOLVED_ZIG_VERSION}) does not match Git tag (${GIT_TAG}).")
endif()
elseif(GIT_DESCRIBE MATCHES "^v?([0-9]+\\.[0-9]+\\.[0-9]+)-([0-9]+)-g(.+)$")
# Untagged pre-release. The Zig version is updated to include the number of commits
# since the last tagged version and the commit hash. The version is formatted in
# accordance with the https://semver.org specification.
set(GIT_TAG ${CMAKE_MATCH_1})
set(GIT_COMMITS_AFTER_TAG ${CMAKE_MATCH_2})
set(GIT_COMMIT ${CMAKE_MATCH_3})
if(NOT RESOLVED_ZIG_VERSION VERSION_GREATER GIT_TAG)
message(SEND_ERROR "Zig version (${RESOLVED_ZIG_VERSION}) must be greater than tagged ancestor (${GIT_TAG}).")
endif()
set(RESOLVED_ZIG_VERSION "${RESOLVED_ZIG_VERSION}-dev.${GIT_COMMITS_AFTER_TAG}+${GIT_COMMIT}")
else()
message(WARNING "Failed to parse version from output of `git describe`.")
endif()
endif()
endif()
endif()
else()
if("${ZIG_VERSION}" STREQUAL "")
set(ZIG_VERSION "${ZIG_VERSION_MAJOR}.${ZIG_VERSION_MINOR}.${ZIG_VERSION_PATCH}")
endif()
set(RESOLVED_ZIG_VERSION "${ZIG_VERSION}")
endif()
message(STATUS "Configuring zig version ${RESOLVED_ZIG_VERSION}")
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