Add script to automate cutting a release

Signed-off-by: Marco Franssen <[email protected]>

release-chart.sh

@@ -0,0 +1,135 @@
+#!/usr/bin/env bash
+##
+## USAGE: __PROG__
+##
+## __PROG__ prepares a release
+##
+## Usage example(s):
+##
+## ./__PROG__ --chart spire --current-version 0.3.0 --new-version 0.4.0
+##
+## Options:
+## --help Show this help message
+## --chart The chart to release
+## --current-version The current version number
+## --new-version The new version number
+## --dry-run Will not actually submit the PR
+##
+## Prerequisites:
+## - gsed (MacOS)
+## - git
+## - GitHub CLI (gh)
+##
+## Commands
+##
+## ./__PROG__ --chart «chart» --current-version «current-version» --new-version «new-version» [--dry-run]
+me=$(basename "$0")
+
+function usage {
+ grep '^##' "$0" | sed -e 's/^##//' -e "s/__PROG__/$me/" >&2
+}
+
+function print_error {
+ echo >&2
+ echo >&2 " ❌ ${*}"
+}
+
+function print_error_and_exit {
+ print_error "${*}"
+ exit 1
+}
+
+while (("$#")); do
+ case "$1" in
+ --help)
+ usage
+ exit 0
+ ;;
+ --chart)
+ chart=$2
+ shift 2
+ ;;
+ --current-version)
+ current_version=$2
+ shift 2
+ ;;
+ --new-version)
+ new_version=$2
+ shift 2
+ ;;
+ --dry-run)
+ dry_run='-w'
+ shift 1
+ ;;
+ *)
+ usage
+ print_error_and_exit 'unexpected option'
+ ;;
+ esac
+done
+
+command -v gh >/dev/null 2>&1 || {
+ print_error_and_exit 'the GitHub cli (gh) is required to run this script'
+}
+
+if [[ $OSTYPE == "darwin"* ]]; then
+ command -v gsed >/dev/null 2>&1 || {
+ print_error_and_exit 'gsed is required to run this script'
+ }
+ SED='gsed'
+else
+ SED='sed'
+fi
+
+if [ -z "$chart" ]; then
+ usage
+ print_error_and_exit 'chart option is missing'
+fi
+
+if [ -z "$current_version" ]; then
+ usage
+ print_error_and_exit 'current-version option is missing'
+fi
+
+if [ -z "$new_version" ]; then
+ usage
+ print_error_and_exit 'new-version option is missing'
+fi
+
+if [ ! -f "charts/${chart}/Chart.yaml" ] ; then
+ print_error_and_exit "no chart named '${chart}' in charts folder"
+fi
+
+git checkout main
+git pull
+git checkout --track -B "bump-${chart}-version" main
+commits_since_previous_release="$(git log "${chart}-${current_version}..HEAD" --pretty=format:'* %h %s')"
+"${SED}" -i "s/version: ${current_version}/version: ${new_version}/" "charts/${chart}/Chart.yaml"
+./helm-docs.sh
+git add "charts/${chart}/"{Chart.yaml,README.md}
+git commit -m "Bump ${chart} Helm Chart version from ${current_version} to ${new_version}" \
+ -m "${commits_since_previous_release}" \
+ -s
+git push -u origin --force-with-lease
+
+cat <<EOF | gh pr create --base main --body-file - "${dry_run}"
+Please review the below changelog to ensure this matches up with the semantic version being applied.
+
+> **Note**: **Maintainers** ensure to run following after merging this PR to trigger the release workflow:
+>
+> \`\`\`shell
+> git checkout main
+> git pull
+> git checkout release
+> git pull
+> git merge main
+> git push
+> \`\`\`
+
+**Changes in this release**
+
+${commits_since_previous_release}
+EOF
+
+gh pr merge --auto -r -d
+git checkout main