chore: factor release note checking into separate script (bazel-contrib#3628)

This is to make it easier to check for missing version markers by
running the script directly

Author: rickeylev

.github/workflows/check_version_markers.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+
+set -o nounset
+set -o pipefail
+set -o errexit
+
+set -x
+
+TAG=${1:-}
+if [ -n "$TAG" ]; then
+  # If the workflow checks out one commit, but is releasing another
+  git fetch origin tag "$TAG"
+  # Update our local state so the grep command below searches what we expect
+  git checkout "$TAG"
+fi
+
+grep_exit_code=0
+# Exclude dot directories, specifically, this file so that we don't
+# find the substring we're looking for in our own file.
+# Exclude CONTRIBUTING.md, RELEASING.md because they document how to use these strings.
+grep --exclude=CONTRIBUTING.md \
+  --exclude=RELEASING.md \
+  --exclude=release.py \
+  --exclude=release_test.py \
+  --exclude-dir=.* \
+  VERSION_NEXT_ -r || grep_exit_code=$?
+
+if [[ $grep_exit_code -eq 0 ]]; then
+  echo
+  echo "Found VERSION_NEXT markers indicating version needs to be specified"
+  exit 1
+fi

.github/workflows/create_archive_and_notes.sh

@@ -26,24 +26,10 @@ if [ -z "$TAG" ]; then
 fi
 # If the workflow checks out one commit, but is releasing another
 git fetch origin tag "$TAG"
-# Update our local state so the grep command below searches what we expect
-git checkout "$TAG"
 
-# Exclude dot directories, specifically, this file so that we don't
-# find the substring we're looking for in our own file.
-# Exclude CONTRIBUTING.md, RELEASING.md because they document how to use these strings.
-grep --exclude=CONTRIBUTING.md \
-  --exclude=RELEASING.md \
-  --exclude=release.py \
-  --exclude=release_test.py \
-  --exclude-dir=.* \
-  VERSION_NEXT_ -r || grep_exit_code=$?
-
-if [[ $grep_exit_code -eq 0 ]]; then
-  echo
-  echo "Found VERSION_NEXT markers indicating version needs to be specified"
-  exit 1
-fi
+# Update our local state so that check_version_markers searches what we expect
+git checkout "$TAG"
+$(dirname $0)/check_version_markers.sh
 
 # A prefix is added to better match the GitHub generated archives.
 PREFIX="rules_python-${TAG}"