Add source revision info (i.e. the Git commit hash of the revision we…

… are building) to the 'images/{jdk,jre}/release' files. This feature was previously only implemented for Mercurial.

make/SourceRevision.gmk

@@ -114,14 +114,28 @@ else
 
     create-source-revision-tracker: $(SOURCE_REVISION_TRACKER)
   else
-    # We don't have a stored source revision. Can't do anything, really.
+    # Are we using GIT ?
+    ifneq ($(wildcard $(TOPDIR)/.git), )
 
-    store-source-revision:
+      store-source-revision:
+	$(call LogInfo, Found Git configuration$(COMMA) using "git log --format=format:%H -1 HEAD^")
+
+      $(SOURCE_REVISION_TRACKER):
+	$(call MakeDir, $(@D))
+	git -C $(TOPDIR) log --format=format:%H -1 HEAD^ > $@
+
+      create-source-revision-tracker: $(SOURCE_REVISION_TRACKER)
+
+    else
+      # We don't have a stored source revision. Can't do anything, really.
+
+      store-source-revision:
 	$(call LogWarn, Error: No mercurial configuration present$(COMMA) cannot create .src-rev)
 	exit 2
 
-    create-source-revision-tracker:
+      create-source-revision-tracker:
 	$(call LogWarn, Warning: No mercurial configuration present and no .src-rev)
+    endif
   endif
 
 endif