main.sh

#!/usr/bin/env bash
# SPDX-License-Identifier: Apache-2.0 OR MIT
set -CeEuo pipefail
IFS=$'\n\t'

retry() {
  for i in {1..10}; do
    if "$@"; then
      return 0
    else
      sleep "${i}"
    fi
  done
  "$@"
}
bail() {
  printf '::error::%s\n' "$*"
  exit 1
}
warn() {
  printf '::warning::%s\n' "$*"
}
download_and_checksum() {
  local url="${1:?}"
  local checksum="${2:?}"
  retry curl --proto '=https' --tlsv1.2 -fsSL --retry 10 "${url}" -o tmp
  if type -P sha256sum >/dev/null; then
    sha256sum -c - >/dev/null <<<"${checksum} *tmp"
  elif type -P shasum >/dev/null; then
    # GitHub-hosted macOS runner does not install GNU Coreutils by default.
    # https://github.com/actions/runner-images/issues/90
    shasum -a 256 -c - >/dev/null <<<"${checksum} *tmp"
  else
    warn "checksum requires 'sha256sum' or 'shasum' command; consider installing one of them; skipped checksum for $(basename -- "${url}")"
  fi
}

if [[ $# -gt 0 ]]; then
  bail "invalid argument '$1'"
fi

# Input options
title="${INPUT_TITLE:?}"
changelog="${INPUT_CHANGELOG:-}"
allow_missing_changelog="${INPUT_ALLOW_MISSING_CHANGELOG:-}"
draft="${INPUT_DRAFT:-}"
branch="${INPUT_BRANCH:-}"
prefix="${INPUT_PREFIX:-}"
token="${INPUT_TOKEN:-"${GITHUB_TOKEN:-}"}"
ref="${INPUT_REF:-"${GITHUB_REF:-}"}"

if [[ -z "${token}" ]]; then
  bail "neither GITHUB_TOKEN environment variable nor 'token' input option is set"
fi

if [[ "${ref}" != "refs/tags/"* ]]; then
  bail "tag ref should start with 'refs/tags/': '${ref}'; this action only supports events from tag or release by default; see <https://github.com/taiki-e/create-gh-release-action#supported-events> for more"
fi
tag="${ref#refs/tags/}"

release_options=("${tag}")
parse_changelog_options=()
if [[ ! "${tag}" =~ ^${prefix}-?v?(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)(-[0-9A-Za-z\.-]+)?(\+[0-9A-Za-z\.-]+)?$ ]]; then
  # TODO: In the next major version, reject underscores in pre-release strings and build metadata.
  if [[ ! "${tag}" =~ ^${prefix}-?v?[0-9]+\.[0-9]+\.[0-9]+(-[0-9A-Za-z_\.-]+)?(\+[0-9A-Za-z_\.-]+)?$ ]]; then
    bail "invalid tag format '${tag}'"
  fi
  warn "underscores are not allowed in semver's pre-release strings and build metadata; this will be rejected in the next major version of create-gh-release-action: '${tag}'"
  # parse-changelog 0.5+'s default version format strictly adheres to semver.
  parse_changelog_options+=(--version-format '^\d+\.\d+\.\d+(-[\w\.-]+)?(\+[\w\.-]+)?$')
fi
# TODO: In the next major version, reject underscores in pre-release strings and build metadata.
if [[ "${tag}" =~ ^${prefix}-?v?[0-9\.]+-[0-9A-Za-z_\.-]+(\+[0-9A-Za-z_\.-]+)?$ ]]; then
  release_options+=("--prerelease")
fi

version="${tag}"
# extract the portion of the tag matching the prefix pattern
if [[ -n "${prefix}" ]]; then
  prefix=$(grep -Eo "^${prefix}" <<<"${tag}")
  prefix="${prefix%-}"
  version="${tag#"${prefix}"}"
  version="${version#-}"
fi
version="${version#v}"

# interpolate $tag, $version, and $prefix into the title string
title="${title/\$tag/${tag}}"
title="${title/\$version/${version}}"
title="${title/\$prefix/${prefix}}"
# interpolate $tag, $version, and $prefix into the changelog path
changelog="${changelog/\$tag/${tag}}"
changelog="${changelog/\$version/${version}}"
changelog="${changelog/\$prefix/${prefix}}"
case "${draft}" in
  true) release_options+=("--draft") ;;
  false) ;;
  *) bail "'draft' input option must be 'true' or 'false': '${draft}'" ;;
esac
case "${allow_missing_changelog}" in
  true | false) ;;
  *) bail "'allow_missing_changelog' input option must be 'true' or 'false': '${allow_missing_changelog}'" ;;
esac

if [[ -n "${branch}" ]]; then
  git fetch &>/dev/null
  if ! git branch -r --contains | grep -Eq "(^|\s)origin/(${branch})$"; then
    git branch -r --contains
    bail "creating of release is only allowed on commits contained in branches that match the specified pattern '${branch}'"
  fi
fi

notes=''
if [[ -n "${changelog}" ]]; then
  # https://github.com/taiki-e/install-action/blob/HEAD/manifests/parse-changelog.json
  parse_changelog_version='0.6.11'
  exe=''
  case "$(uname -s)" in
    Linux)
      # AArch64 macOS/Windows can run x86_64 binaries, so handles architecture only on Linux.
      case "$(uname -m)" in
        aarch64 | arm64)
          parse_changelog_target=aarch64-unknown-linux-musl
          parse_changelog_checksum='a294359f1b1a904a34911fbf482c69ee28924dc8c27f2a1b84b4eb2108b6df3d'
          ;;
        *)
          parse_changelog_target=x86_64-unknown-linux-musl
          parse_changelog_checksum='805c0e86ad53c734973e1f55efc8fb6d82919029fdca4d27f80d590f94688edc'
          ;;
      esac
      ;;
    Darwin)
      parse_changelog_target=x86_64-apple-darwin
      parse_changelog_checksum='9176db18ab6adc3bb1d4302eb52c83a9d46319df2b4671fccc4669dd8ce36fc6'
      ;;
    MINGW* | MSYS* | CYGWIN* | Windows_NT)
      exe=.exe
      parse_changelog_target=x86_64-pc-windows-msvc
      parse_changelog_checksum='299c282946f836b200940f0b4b2c8646e51eff9f3602bd0c2a99b483aa2d4429'
      ;;
    *) bail "unrecognized OS type '$(uname -s)'" ;;
  esac
  action_dir="${HOME}/.create-gh-release-action"
  mkdir -p -- "${action_dir}/bin"
  (
    cd -- "${action_dir}/bin"
    download_and_checksum "https://github.com/taiki-e/parse-changelog/releases/download/v${parse_changelog_version}/parse-changelog-${parse_changelog_target}.tar.gz" "${parse_changelog_checksum}"
    tar xzf tmp
  )
  parse_changelog_options+=("${changelog}" "${version}")

  # If allow_missing_changelog is true then default to empty value if version not found
  if [[ "${allow_missing_changelog}" == "true" ]]; then
    notes=$("${action_dir}/bin/parse-changelog${exe}" "${parse_changelog_options[@]}" || true)
  else
    notes=$("${action_dir}/bin/parse-changelog${exe}" "${parse_changelog_options[@]}")
  fi

  rm -rf -- "${action_dir}"
fi

# https://cli.github.com/manual/gh_release_view
if GITHUB_TOKEN="${token}" gh release view "${tag}" &>/dev/null; then
  # https://cli.github.com/manual/gh_release_delete
  GITHUB_TOKEN="${token}" gh release delete "${tag}" -y || true
fi

# https://cli.github.com/manual/gh_release_create
GITHUB_TOKEN="${token}" retry gh release create "${release_options[@]}" --title "${title}" --notes "${notes}"

# Set (computed) prefix and version outputs for future step use.
computed_prefix=${tag%"${version}"}
if [[ -n "${GITHUB_OUTPUT:-}" ]]; then
  printf 'computed-prefix=%s\n' "${computed_prefix}" >>"${GITHUB_OUTPUT}"
  printf 'version=%s\n' "${version}" >>"${GITHUB_OUTPUT}"
else
  # Self-hosted runner may not set GITHUB_OUTPUT.
  warn "GITHUB_OUTPUT is not set; skip setting 'computed-prefix' and 'version' outputs"
  printf 'computed-prefix: %s\n' "${computed_prefix}"
  printf 'version: %s\n' "${version}"
fi