classes/buildhistory: tag last 3 build revisions

This makes it easier to obtain the difference from the last three
builds particularly where a single build might account for more than one
commit in the buildhistory git repository (e.g. if package and image
changes occurred).

(From OE-Core rev: 9512f3787295d662678c2943da31197c8df39e99)

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

1 files changed, 4 insertions, 0 deletions

diff --git a/meta/classes/buildhistory.bbclass b/meta/classes/buildhistory.bbclass
index 6fb1ba646d..e3f92018f2 100644
--- a/meta/classes/buildhistory.bbclass
+++ b/meta/classes/buildhistory.bbclass
@@ -518,6 +518,10 @@ END
                 # Initialise the repo if necessary
                 if [ ! -d .git ] ; then
                         git init -q
+                else
+                        git tag -f build-minus-3 build-minus-2 > /dev/null 2>&1 || true
+                        git tag -f build-minus-2 build-minus-1 > /dev/null 2>&1 || true
+                        git tag -f build-minus-1 > /dev/null 2>&1 || true
                 fi
                 # Check if there are new/changed files to commit (other than metadata-revs)
                 repostatus=`git status --porcelain | grep -v " metadata-revs$"`