Core (Build): Regenerate version.h whenever revision changes (fixes issue #2)

Author: kaixiong

libvisual/CMakeLists.txt

@@ -247,21 +247,19 @@ IF(ENABLE_PEDANTIC_CHECKS)
   ADD_DEFINITIONS(-DVISUAL_PEDANTIC_CHECKS)
 ENDIF()
 
-# Build version
-EXECUTE_PROCESS(
-  COMMAND git describe --always --dirty
-  WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-  OUTPUT_STRIP_TRAILING_WHITESPACE
-  OUTPUT_VARIABLE LV_REVISION
-  ERROR_QUIET
+# Git revision
+FIND_PACKAGE(Git)
+CONFIGURE_FILE(
+  "${PROJECT_SOURCE_DIR}/update-version.sh.in"
+  "${PROJECT_BINARY_DIR}/update-version.sh"
+  @ONLY
+)
+ADD_CUSTOM_TARGET(update-version ALL
+  COMMAND /bin/sh ${PROJECT_BINARY_DIR}/update-version.sh
 )
-
-IF(NOT LV_REVISION)
-  SET(LV_REVISION "unknown")
-ENDIF()
 
 # Tools
-OPTION(ENABLE_TOOLS "Build Libvisual tools" yes)
+OPTION(ENABLE_TOOLS "Biuld Libvisual tools" yes)
 IF(ENABLE_TOOLS)
   FIND_PACKAGE(SDL)
   FIND_PACKAGE(OpenGL)
@@ -284,7 +282,6 @@ INSTALL(FILES ${PROJECT_BINARY_DIR}/${LV_PKG_CONFIG_NAME}.pc DESTINATION ${CMAKE
 # Generate config headers
 CONFIGURE_FILE(${PROJECT_SOURCE_DIR}/config.h.in ${PROJECT_BINARY_DIR}/config.h)
 CONFIGURE_FILE(${PROJECT_SOURCE_DIR}/libvisual/lvconfig.h.in ${PROJECT_BINARY_DIR}/libvisual/lvconfig.h)
-CONFIGURE_FILE(${PROJECT_SOURCE_DIR}/version.h.in ${PROJECT_BINARY_DIR}/version.h)
 
 # Build libvisual
 ADD_SUBDIRECTORY(libvisual)

libvisual/update-version.sh.in

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+GIT="@GIT_EXECUTABLE@"
+
+SOURCE_DIR="@PROJECT_SOURCE_DIR@"
+BINARY_DIR="@PROJECT_BINARY_DIR@"
+
+INPUT_HEADER="$SOURCE_DIR/version.h.in"
+OUTPUT_HEADER="$BINARY_DIR/version.h"
+
+cd $SOURCE_DIR
+
+REVISION=$($GIT describe --always --dirty 2>/dev/null)
+[ -z "$REVISION" ] && REVISION="unknown"
+
+if [ -z "$(grep $REVISION $OUTPUT_HEADER 2>/dev/null)" ]; then
+    echo "Generating version.h"
+    sed -e "s/\@LV_REVISION\@/$REVISION/g" < $INPUT_HEADER > $OUTPUT_HEADER
+fi
+
+exit 0