Add CPackGit.cmake to enable compilation of hev-display

fa584e27 · Dónal Murray · d17a0102 · fa584e27
Commit fa584e27 authored Jan 29, 2021 by Dónal Murray
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CPackGit.cmake hev-display/extras/cmake/CPackGit.cmake +46 -0

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--- a/hev-display/extras/cmake/CPackGit.cmake
+++ b/hev-display/extras/cmake/CPackGit.cmake
+set (CPACK_PROJECT_CONFIG_FILE "${PROJECT_SOURCE_DIR}/extras/cmake/CPackConfig.cmake")
+
+# CPackConfig.cmake is stored in the source dir so that upstream tarballs automatically have a copy of it
+# (it contains variables computed from git tags, and git history is not available in an upstream tarball)
+if (NOT EXISTS "${CPACK_PROJECT_CONFIG_FILE}")
+  find_package (Git REQUIRED)
+
+  execute_process (
+   COMMAND ${GIT_EXECUTABLE} --git-dir "${PROJECT_SOURCE_DIR}/.git" describe --always
+   OUTPUT_VARIABLE GIT_HASH)
+
+  execute_process (
+   COMMAND ${GIT_EXECUTABLE} --git-dir "${PROJECT_SOURCE_DIR}/.git" rev-list --count ${GIT_HASH}
+   OUTPUT_VARIABLE COMMIT_COUNT)
+
+  execute_process (
+   COMMAND ${GIT_EXECUTABLE} --git-dir "${PROJECT_SOURCE_DIR}/.git" tag
+   OUTPUT_VARIABLE LATEST_TAG)
+
+  set (GIT_DESCRIBE "v0.0.0-284-g${GIT_HASH}")
+
+  message ("Git describe: ${GIT_DESCRIBE}")
+
+  string (REGEX MATCH "v([0-9]+).([0-9]+).([0-9]+)-([0-9]+)-g([0-9a-f]+)" match ${GIT_DESCRIBE})
+  if (NOT match)
+    string (REGEX MATCH "v([0-9]+).([0-9]+).([0-9]+)" match ${GIT_DESCRIBE})
+  endif ()
+
+  if (NOT match)
+    message (WARNING "Version '${GIT_DESCRIBE}' from git cannot be recognized as a valid version string")
+  endif ()
+
+  set (CMAKE_PROJECT_VERSION_MAJOR ${CMAKE_MATCH_1})
+  set (CMAKE_PROJECT_VERSION_MINOR ${CMAKE_MATCH_2})
+  set (CMAKE_PROJECT_VERSION_PATCH ${CMAKE_MATCH_3})
+  set (CMAKE_PROJECT_VERSION_TWEAK ${CMAKE_MATCH_4})
+
+  set (GIT_SHA_SHORT ${CMAKE_MATCH_5})
+
+  configure_file ("${CPACK_PROJECT_CONFIG_FILE}.in" "${CPACK_PROJECT_CONFIG_FILE}" @ONLY)
+endif ()
+
+include (${CPACK_PROJECT_CONFIG_FILE})
+
+# include CPack module once all variables are set
+include (CPack)