From bd45fdf1e16e7d4ff49e1472ee30f269867f531e Mon Sep 17 00:00:00 2001
From: Marvin W <git@larma.de>
Date: Tue, 17 Dec 2019 23:52:05 +0100
Subject: Add version and adjust some cmake

---
 cmake/ComputeVersion.cmake | 104 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 104 insertions(+)
 create mode 100644 cmake/ComputeVersion.cmake

(limited to 'cmake/ComputeVersion.cmake')

diff --git a/cmake/ComputeVersion.cmake b/cmake/ComputeVersion.cmake
new file mode 100644
index 00000000..3a962671
--- /dev/null
+++ b/cmake/ComputeVersion.cmake
@@ -0,0 +1,104 @@
+include(CMakeParseArguments)
+
+function(_compute_version_from_file)
+    set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${CMAKE_SOURCE_DIR}/VERSION)
+    if (NOT EXISTS ${CMAKE_SOURCE_DIR}/VERSION)
+        set(VERSION_FOUND 0 PARENT_SCOPE)
+        return()
+    endif ()
+    file(STRINGS ${CMAKE_SOURCE_DIR}/VERSION VERSION_FILE)
+    string(REPLACE " " ";" VERSION_FILE "${VERSION_FILE}")
+    cmake_parse_arguments(VERSION_FILE "" "RELEASE;PRERELEASE" "" ${VERSION_FILE})
+    if (DEFINED VERSION_FILE_RELEASE)
+        string(STRIP "${VERSION_FILE_RELEASE}" VERSION_FILE_RELEASE)
+        set(VERSION_IS_RELEASE 1 PARENT_SCOPE)
+        set(VERSION_FULL "${VERSION_FILE_RELEASE}" PARENT_SCOPE)
+        set(VERSION_FOUND 1 PARENT_SCOPE)
+    elseif (DEFINED VERSION_FILE_PRERELEASE)
+        string(STRIP "${VERSION_FILE_PRERELEASE}" VERSION_FILE_PRERELEASE)
+        set(VERSION_IS_RELEASE 0 PARENT_SCOPE)
+        set(VERSION_FULL "${VERSION_FILE_PRERELEASE}" PARENT_SCOPE)
+        set(VERSION_FOUND 1 PARENT_SCOPE)
+    else ()
+        set(VERSION_FOUND 0 PARENT_SCOPE)
+    endif ()
+endfunction(_compute_version_from_file)
+
+function(_compute_version_from_git)
+    set_property(DIRECTORY APPEND PROPERTY CMAKE_CONFIGURE_DEPENDS ${CMAKE_SOURCE_DIR}/.git)
+    if (NOT GIT_EXECUTABLE)
+        find_package(Git QUIET)
+        if (NOT GIT_FOUND)
+            return()
+        endif ()
+    endif (NOT GIT_EXECUTABLE)
+
+    # Git tag
+    execute_process(
+            COMMAND "${GIT_EXECUTABLE}" describe --tags --abbrev=0
+            WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+            RESULT_VARIABLE git_result
+            OUTPUT_VARIABLE git_tag
+            ERROR_VARIABLE git_error
+            OUTPUT_STRIP_TRAILING_WHITESPACE
+            ERROR_STRIP_TRAILING_WHITESPACE
+    )
+    if (NOT git_result EQUAL 0)
+        return()
+    endif (NOT git_result EQUAL 0)
+
+    if (git_tag MATCHES "^v?([0-9]+[.]?[0-9]*[.]?[0-9]*)(-[.0-9A-Za-z-]+)?([+][.0-9A-Za-z-]+)?$")
+        set(VERSION_LAST_RELEASE "${CMAKE_MATCH_1}")
+    else ()
+        return()
+    endif ()
+
+    # Git describe
+    execute_process(
+            COMMAND "${GIT_EXECUTABLE}" describe --tags
+            WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+            RESULT_VARIABLE git_result
+            OUTPUT_VARIABLE git_describe
+            ERROR_VARIABLE git_error
+            OUTPUT_STRIP_TRAILING_WHITESPACE
+            ERROR_STRIP_TRAILING_WHITESPACE
+    )
+    if (NOT git_result EQUAL 0)
+        return()
+    endif (NOT git_result EQUAL 0)
+
+    if ("${git_tag}" STREQUAL "${git_describe}")
+        set(VERSION_IS_RELEASE 1)
+    else ()
+        set(VERSION_IS_RELEASE 0)
+        if (git_describe MATCHES "g([0-9a-f]+)$")
+            set(VERSION_COMMIT_HASH "${CMAKE_MATCH_1}")
+        endif ()
+        execute_process(
+                COMMAND "${GIT_EXECUTABLE}" show --format=%cd --date=format:%Y%m%d -s
+                WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+                RESULT_VARIABLE git_result
+                OUTPUT_VARIABLE git_time
+                ERROR_VARIABLE git_error
+                OUTPUT_STRIP_TRAILING_WHITESPACE
+                ERROR_STRIP_TRAILING_WHITESPACE
+        )
+        if (NOT git_result EQUAL 0)
+            return()
+        endif (NOT git_result EQUAL 0)
+        set(VERSION_COMMIT_DATE "${git_time}")
+    endif ()
+    if (NOT VERSION_IS_RELEASE)
+        set(VERSION_SUFFIX ".git${VERSION_COMMIT_DATE}.${VERSION_COMMIT_HASH}")
+    else (NOT VERSION_IS_RELEASE)
+        set(VERSION_SUFFIX "")
+    endif (NOT VERSION_IS_RELEASE)
+    set(VERSION_IS_RELEASE ${VERSION_IS_RELEASE} PARENT_SCOPE)
+    set(VERSION_FULL "${VERSION_LAST_RELEASE}${VERSION_SUFFIX}" PARENT_SCOPE)
+    set(VERSION_FOUND 1 PARENT_SCOPE)
+endfunction(_compute_version_from_git)
+
+_compute_version_from_file()
+if (NOT VERSION_FOUND)
+    _compute_version_from_git()
+endif (NOT VERSION_FOUND)
\ No newline at end of file
-- 
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