Linux/appdata: generate release info

src/XDGData/CMakeLists.txt

@@ -1,4 +1,36 @@
-install(FILES org.freecadweb.FreeCAD.appdata.xml DESTINATION ${CMAKE_INSTALL_PREFIX}/share/metainfo)
-install(FILES org.freecadweb.FreeCAD.desktop DESTINATION ${CMAKE_INSTALL_PREFIX}/share/applications)
-install(FILES org.freecadweb.FreeCAD.svg DESTINATION ${CMAKE_INSTALL_PREFIX}/share/icons/hicolor/scalable/apps)
-install(FILES org.freecadweb.FreeCAD.xml DESTINATION ${CMAKE_INSTALL_PREFIX}/share/mime/packages)
+include(GNUInstallDirs)
+
+if(NOT DEFINED APPDATA_RELEASE_DATE)
+    if(EXISTS "${CMAKE_SOURCE_DIR}/.git")
+        execute_process(COMMAND git log -1 --pretty=%cd --date=short
+            OUTPUT_VARIABLE APPDATA_RELEASE_DATE
+            WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
+            OUTPUT_STRIP_TRAILING_WHITESPACE)
+    else()
+        file(TIMESTAMP "${CMAKE_SOURCE_DIR}/CMakeLists.txt" APPDATA_RELEASE_DATE "%Y-%m-%d")
+    endif()
+endif()
+
+configure_file(
+    org.freecadweb.FreeCAD.appdata.xml.in
+    ${CMAKE_BINARY_DIR}/org.freecadweb.FreeCAD.appdata.xml
+)
+install(
+    FILES ${CMAKE_BINARY_DIR}/org.freecadweb.FreeCAD.appdata.xml
+    DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/metainfo
+)
+
+install(
+    FILES org.freecadweb.FreeCAD.desktop
+    DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/applications
+)
+
+install(
+    FILES org.freecadweb.FreeCAD.svg
+    DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/icons/hicolor/scalable/apps
+)
+
+install(
+    FILES org.freecadweb.FreeCAD.xml
+    DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/mime/packages
+)

src/XDGData/org.freecadweb.FreeCAD.appdata.xml.in

@@ -29,8 +29,8 @@
   <url type="help">https://forum.freecadweb.org</url>
   <url type="donation">https://www.freecadweb.org/wiki/Donate</url>
   <update_contact>yorik_AT_uncreated.net</update_contact>
-  <content_rating type="oars-1.1" />
+  <content_rating type="oars-1.1"/>
   <releases>
-    <release version="0.17" date="2018-04-06"></release>
+    <release version="@PACKAGE_VERSION@" date="@APPDATA_RELEASE_DATE@"/>
   </releases>
 </component>