Refactor auto-update scripts.

.github/create_submodule_update_pr.sh

@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+
+# Usage:
+#   $0 PACKAGE_NAME VERSION
+#
+# Before calling this script, run the commands to update the dependency. If
+# there dependency shouldn't update then the script must not modify the repo.
+#
+# When the repo is in the updated state, run this script. It will commit
+# everything and create a PR.
+#
+# The PR title is `Update ${PACKAGE_NAME} to ${VERSION}` the script checks for
+# this string and only creates a new PR if the string isn't the title of an
+# existing PR.
+#
+# PACKAGE_NAME is an identifier of the package, no spaces. Doesn't need to be
+#              the exact name of the dependency.
+#
+# VERSION an identifier of the next version of the package, no spaces. This
+#         variable must be the same if the version if the same and different if
+#         the version is different. However, it doesn't have to be a `x.y.z` it
+#         could be a Git SHA, or something else.
+
+set -eu
+
+PACKAGE_NAME=$1
+VERSION=$2
+BRANCH=update-${PACKAGE_NAME}-${VERSION}
+COMMIT_MESSAGE="Update ${PACKAGE_NAME} to ${VERSION}"
+
+if [[ -z "${PACKAGE_NAME}" ]]
+then
+    echo "Empty PACKAGE_NAME."
+    exit -1
+fi
+
+if [[ -z "${VERSION}" ]]
+then
+    echo "Empty VERSION."
+    exit -1
+fi
+
+
+# NOTE: In a later runs of CI we will search for PR with this exact
+#       title. Only if no such PR exists will the script create a
+#       new PR.
+PR_TITLE="Update ${PACKAGE_NAME} to ${VERSION}"
+
+if [[ -z "$(git status --porcelain)" ]]
+then
+    echo "No differences detected: ${PACKAGE_NAME} is up-to-date."
+    exit 0
+fi
+
+if [[ -z "$(gh pr list --state all --search "${PR_TITLE}")" ]]
+then
+
+    git checkout -b $BRANCH
+    git config user.name github-actions
+    git config user.email github-actions@github.com
+    git commit -a -m "${COMMIT_MESSAGE}"
+
+    git push -u origin ${BRANCH}
+    gh pr create \
+        --title "${PR_TITLE}" \
+        --body "This PR was generated by a Github Actions workflow."
+
+else
+    echo "Old PR detected: didn't create a new one."
+fi

.github/workflows/check_doxygen_awesome_version.yml

@@ -17,33 +17,4 @@ jobs:
         run: |
 
           VERSION=$(doc/doxygen-awesome-css/update_doxygen_awesome.sh "$(mktemp -d)")
-          BRANCH=update-doxygen-awesome-${VERSION}
-          COMMIT_MESSAGE="Update doxygen-awesome to ${VERSION}"
-
-          # NOTE: In a later runs of CI we will search for PR with this exact
-          #       title. Only if no such PR exists will the script create a
-          #       new PR.
-          PR_TITLE="[docs] Update doxygen-awesome to ${VERSION}"
-
-          if [[ -z "$(git status --porcelain)" ]]
-          then
-              echo "No differences detected: doxygen-awesome is up-to-date."
-              exit 0
-          fi
-
-          if [[ -z "$(gh pr list --state all --search "${PR_TITLE}")" ]]
-          then
-
-              git checkout -b $BRANCH
-              git config user.name github-actions
-              git config user.email github-actions@github.com
-              git commit -a -m "${COMMIT_MESSAGE}"
-
-              git push -u origin ${BRANCH}
-              gh pr create \
-                  --title "${PR_TITLE}" \
-                  --body "This PR was generated by a Github Actions workflow."
-
-          else
-              echo "Old PR detected: didn't create a new one."
-          fi
+          .github/create_submodule_update_pr.sh doxygen-awesome ${VERSION}