Help review a rebase pull request by highlighting downstream changes that have not been ported

review_rebase.sh

#!/usr/bin/env sh

set -xe

CURRENT_BASE_TAG=$1
NEW_BASE_TAG=$2
REBASE_PR=$3
PR_REMOTE=openshift

[ -n "$REBASE_PR" ]

CURRENT_BASE_DIFF=current-base.diff
NEW_BASE_DIFF=new-base.diff
REBASE_BRANCH=pr-${PR_REMOTE}-${REBASE_PR}

git fetch $PR_REMOTE pull/$REBASE_PR/head:$REBASE_BRANCH

git diff  ${CURRENT_BASE_TAG}..main > $CURRENT_BASE_DIFF
git diff ${NEW_BASE_TAG}..${REBASE_BRANCH} > $NEW_BASE_DIFF
diff $CURRENT_BASE_DIFF $NEW_BASE_DIFF --side-by-side --suppress-common-lines --suppress-blank-empty