fix(build): error in tagging the downstream repo

In case of travis, the $TRAVIS_BRANCH contains
the same value as $TRAVIS_TAG.

Example: 1.9.0-RC1 tag and 1.9.0-RC1 branch.

Due to this the git-release script failed.

This commit adds a step to convert the TRAVIS_TAG
to corresponding release branch.
Example: 1.9.0-RC1 should happen from v1.9.x

Note: OpenEBS release follow the SemVer release format
 of major.minor.patch[-build-meta]

Signed-off-by: kmova <[email protected]>

.travis.yml

@@ -56,8 +56,14 @@ script:
   # If this build is running due to travis release tag, and
   # this job indicates to push the release downstream, then
   # go ahead and tag the dependent repo.
+  #
+  # $TRAVIS_BRANCH contains the same value as $TRAVIS_TAG.
+  # Example: 1.9.0-RC1 tag and 1.9.0-RC1 branch. 
+  # OpenEBS release are done from branches named as v1.9.x. 
+  # Convert the TRAVIS_TAG to the corresponding release branch.
   - if [ ! -z $TRAVIS_TAG ] && [ $RELEASE_TAG_DOWNSTREAM = 1 ] && [ "$TRAVIS_REPO_SLUG" == "openebs/jiva-operator" ]; then
-      ./build/git-release "openebs/jiva-csi" "$TRAVIS_TAG" "$TRAVIS_BRANCH" || travis_terminate 1;
+      REL_BRANCH=$(echo v$(echo "$TRAVIS_TAG" | cut -d'-' -f1 | rev | cut -d'.' -f2- | rev).x) ;
+      ./build/git-release "openebs/jiva-csi" "$TRAVIS_TAG" "$REL_BRANCH" || travis_terminate 1;
     fi
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