Extract the version from $GITHUB_REF

$GITHUB_REF is something like "refs/tags/1.6.2" and we need to take
only the last part of it.

Author: kennyadsl

publish-on-orbs-registry/entrypoint.sh

@@ -1,4 +1,8 @@
 #!/bin/sh -l
 
-echo "Trying to publish orb with version ${GITHUB_REF}"
-circleci orb publish source.yml "nebulab/feature-branch-preview@${GITHUB_REF}" --token $CIRCLECI_TOKEN
+# $GITHUB_REF is something like "refs/tags/1.6.2" and we need to take
+# only the last part of it.
+version=${GITHUB_REF/refs\/tags\//}
+
+echo "Trying to publish orb with version ${version}"
+circleci orb publish source.yml "nebulab/feature-branch-preview@${version}" --token $CIRCLECI_TOKEN