classes/buildhistory: save metadata revisions

Always write the metadata revisions for each layer into a machine-
readable "metadata-revs" file so that you can potentially link changes
in the output back to changes in the metadata. (Unlike the existing
similar build-id file, this is not specific to image changes.)

(From OE-Core rev: 45f38d167b523d769c072474b36b3d9b31b4e9d9)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 19 insertions, 4 deletions

diff --git a/meta/classes/buildhistory.bbclass b/meta/classes/buildhistory.bbclass
index 76648c9499..e121088d59 100644
--- a/meta/classes/buildhistory.bbclass
+++ b/meta/classes/buildhistory.bbclass
@@ -354,6 +354,15 @@ def buildhistory_get_layers(d):
     layertext = "Configured metadata layers:\n%s\n" % '\n'.join(get_layers_branch_rev(d))
     return layertext
 
+def buildhistory_get_metadata_revs(d):
+    # We want an easily machine-readable format here, so get_layers_branch_rev isn't quite what we want
+    layers = (d.getVar("BBLAYERS", True) or "").split()
+    medadata_revs = ["%-17s = %s:%s" % (os.path.basename(i), \
+        base_get_metadata_git_branch(i, None).strip(), \
+        base_get_metadata_git_revision(i, None)) \
+            for i in layers]
+    return '\n'.join(medadata_revs)
+
 
 def squashspaces(string):
     import re
@@ -382,19 +391,25 @@ buildhistory_commit() {
                 return
         fi
 
+        # Create a machine-readable list of metadata revisions for each layer
+        cat > ${BUILDHISTORY_DIR}/metadata-revs <<END
+${@buildhistory_get_metadata_revs(d)}
+END
+
         ( cd ${BUILDHISTORY_DIR}/
                 # Initialise the repo if necessary
                 if [ ! -d .git ] ; then
                         git init -q
                 fi
-                # Ensure there are new/changed files to commit
-                repostatus=`git status --porcelain`
+                # Check if there are new/changed files to commit (other than metadata-revs)
+                repostatus=`git status --porcelain | grep -v " metadata-revs$"`
                 if [ "$repostatus" != "" ] ; then
-                        git add ${BUILDHISTORY_DIR}/*
+                        git add .
                         HOSTNAME=`hostname 2>/dev/null || echo unknown`
                         # porcelain output looks like "?? packages/foo/bar"
+                        # Ensure we commit metadata-revs with the first commit
                         for entry in `echo "$repostatus" | awk '{print $2}' | awk -F/ '{print $1}' | sort | uniq` ; do
-                                git commit ${BUILDHISTORY_DIR}/$entry -m "$entry: Build ${BUILDNAME} of ${DISTRO} ${DISTRO_VERSION} for machine ${MACHINE} on $HOSTNAME" --author "${BUILDHISTORY_COMMIT_AUTHOR}" > /dev/null
+                                git commit $entry metadata-revs -m "$entry: Build ${BUILDNAME} of ${DISTRO} ${DISTRO_VERSION} for machine ${MACHINE} on $HOSTNAME" --author "${BUILDHISTORY_COMMIT_AUTHOR}" > /dev/null
                         done
                         if [ "${BUILDHISTORY_PUSH_REPO}" != "" ] ; then
                                 git push -q ${BUILDHISTORY_PUSH_REPO}