ci: Add release.sh script

release.sh

@@ -0,0 +1,93 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+# The script could be run from any directory.
+cd "$(dirname "$0")"
+
+# Configure the script
+properties="gradle.properties"
+changelog="CHANGELOG.md"
+readme="README.md"
+files_to_update_version=("$properties" "$readme")
+github_repository_url="https://github.com/RedMadRobot/gears-android"
+
+#region Utils
+function property {
+  grep "^${1}=" "$properties" | cut -d'=' -f2
+}
+
+function replace() {
+  # Escape linebreaks
+  local replacement=${2//$'\n'/\\\n}
+  # Portable in-place edit.
+  # See: https://stackoverflow.com/a/4247319
+  sed -i".bak" -E "s~$1~$replacement~g" "$3"
+  rm "$3.bak"
+}
+
+function diff_link() {
+  echo -n "$github_repository_url/compare/${1}...${2}"
+}
+#endregion
+
+# 0. Fetch remote changes
+echo "️⏳ Updating local repository..."
+git fetch --quiet -p origin
+git switch --quiet main
+git pull --quiet --rebase origin
+echo "✅ Repository updated."
+echo
+
+# 1. Calculate version values for later
+last_version=$(property "version")
+version=$(date "+%Y.%m.%d")
+if [[ "$last_version" == "$version" ]]; then
+  echo "🤔 Version $version is already set."
+  exit 0
+fi
+echo "🚀 Update $last_version -> $version"
+echo
+
+# 2. Update version everywhere
+for file in "${files_to_update_version[@]}" ; do
+  replace "$last_version" "$version" "$file"
+  echo "✅ Updated version in $file"
+done
+
+# 3. Update header in CHANGELOG.md
+header_replacement=\
+"## [Unreleased]
+
+### Changes
+
+- *No changes*
+
+## [$version]"
+replace "^## \[Unreleased\].*" "$header_replacement" "$changelog"
+echo "✅ Updated CHANGELOG.md header"
+
+# 4. Add link to version diff
+unreleased_diff_link="[unreleased]: $(diff_link "$version" "main")"
+version_diff_link="[$version]: $(diff_link "$last_version" "$version")"
+replace "^\[unreleased\]:.*" "$unreleased_diff_link\n$version_diff_link" "$changelog"
+echo "✅ Added a diff link to CHANGELOG.md"
+
+# 5. Ask if the changes should be pushed to remote branch
+echo
+echo "Do you want to commit the changes and create a release tag?"
+echo "The release tag push will trigger a release workflow on CI."
+read -p " Enter 'yes' to continue: " -r input
+if [[ "$input" != "yes" ]]; then
+  echo "👌 DONE."
+  exit 0
+fi
+
+# 6. Push changes and trigger release on CI
+echo
+echo "⏳ Pushing the changes to the remote repository..."
+git add "$readme" "$changelog" "$properties"
+git commit --quiet --message "version: $version"
+git tag "$version"
+git push --quiet origin HEAD "$version"
+echo "🎉 DONE."