cmake: Move version setup into a separate .cmake file

[quassel.git] / cmake / QuasselVersion.cmake

diff --git a/cmake/QuasselVersion.cmake b/cmake/QuasselVersion.cmake
new file mode 100644 (file)
index 0000000..6f2cbad
--- /dev/null
+++ b/cmake/QuasselVersion.cmake
@@ -0,0 +1,58 @@
+# Set up version-related information
+###############################################################################
+
+# Quassel version
+set(QUASSEL_MAJOR  0)
+set(QUASSEL_MINOR 13)
+set(QUASSEL_PATCH 50)
+set(QUASSEL_VERSION_STRING "0.14-pre")
+
+# Get additional version information from Git
+include(GetGitRevisionDescription)
+get_git_head_revision(GIT_REFSPEC GIT_HEAD)
+git_describe(GIT_DESCRIBE --long)
+
+# If in a Git repo we can get the commit-date from a git command
+if (GIT_HEAD)
+    find_program(GIT_COMMAND NAMES git)
+    if (GIT_COMMAND)
+        execute_process(
+            COMMAND ${GIT_COMMAND} -c log.showsignature=false show -s --format=%ct
+            WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
+            OUTPUT_VARIABLE GIT_COMMIT_DATE
+            OUTPUT_STRIP_TRAILING_WHITESPACE
+        )
+    endif()
+endif()
+
+# If not in a Git repo try to read GIT_HEAD and GIT_DESCRIBE from enviroment
+if (NOT GIT_HEAD OR NOT GIT_DESCRIBE)
+  if (DEFINED ENV{GIT_HEAD})
+      set(GIT_HEAD $ENV{GIT_HEAD})
+  endif()
+  if (DEFINED ENV{GIT_DESCRIBE})
+     set(GIT_DESCRIBE $ENV{GIT_DESCRIBE})
+  endif()
+endif()
+
+# Sanitize things if we're not in a Git repo
+if (NOT GIT_HEAD OR NOT GIT_DESCRIBE)
+    set(GIT_HEAD "")
+    set(GIT_DESCRIBE "")
+    set(GIT_COMMIT_DATE 0)
+endif()
+
+# Ensure we have a sensible value for GIT_COMMIT_DATE
+if (NOT GIT_COMMIT_DATE)
+    set(GIT_COMMIT_DATE 0)
+endif()
+
+# Generate version header
+configure_file(version.h.in ${CMAKE_BINARY_DIR}/version.h @ONLY)
+
+# Output version, with commit hash if available
+if (GIT_HEAD)
+    string(SUBSTRING "${GIT_HEAD}" 0 7 extra_version)
+    set(extra_version " (git-${extra_version})")
+endif()
+message(STATUS "Building Quassel ${QUASSEL_VERSION_STRING}${extra_version}")