probot-settings

#!/usr/bin/env bash
set -euo pipefail

# This script will run Probot settings in a push simulation.
# This script can be used in a Github workflow to achieve the same functionality
# without the need of installing the Probot settings app to your repository.
#
# Update repository settings of any git repository
# that has a `.github/settings.yml` file, by running

# ```bash
# cd path/to/git/repo
#
# GITHUB_TOKEN=xxx GITHUB_API_URL=xxx GIT_REPO_SLUG=xxx/xxx GIT_REPO_DEFAULT_BRANCH=xxx path/to/probot-settings
#
# GITHUB_TOKEN               is a Github PAT with 'repo' permissions
# GITHUB_API_URL             is optional, defaults to https://api.github.com
# GITHUB_REPO_SLUG           is optional, defaults to current git repo based on PWD
# GITHUB_REPO_DEFAULT_BRANCH is optional, defaults to master
# ```

TMP_PROBOT_SETTINGS=$(mktemp -d -t yplatform.XXXXXXXXXX)
TMP_FIXTURE_PAYLOAD_PATH=${TMP_PROBOT_SETTINGS}/fixture-payload-pathjson
TMP_NPX_SCRIPT=${TMP_PROBOT_SETTINGS}/npx-script
function on_exit() {
    rm -rf "${TMP_PROBOT_SETTINGS}"
}
trap on_exit EXIT

command -v npx || {
    >&2 echo "[ERR ]" "Install npx."
    >&2 echo "[INFO]" "brew install node"
    exit 1
}

GITHUB_API_URL=${GITHUB_API_URL:-https://api.github.com}
GITHUB_REPO_DEFAULT_BRANCH="${REPO_DEFAULT_BRANCH:-master}"

[[ -n "${GITHUB_REPO_SLUG:-}" ]] || {
    GIT_ROOT=$(git rev-parse --show-toplevel 2>/dev/null || true)
    GIT_REMOTE_ORIGIN_URL="$(git -C "${GIT_ROOT}" config remote.origin.url)"
    GITHUB_REPO_OWNER=$(dirname "${GIT_REMOTE_ORIGIN_URL//://}")
    GITHUB_REPO_NAME=$(basename "${GIT_REMOTE_ORIGIN_URL}" .git)
    GITHUB_REPO_SLUG=${GITHUB_REPO_OWNER}/${GITHUB_REPO_NAME}
    >&2 echo "[INFO]" "The settings will be read only from the remote ${GITHUB_REPO_DEFAULT_BRANCH} branch of"
    >&2 echo "      " "${GIT_REMOTE_ORIGIN_URL}"
    >&2 echo "[INFO]" "Make sure you 'git push' first."
    [[ "${CI:-}" = "true" ]] || read -r -p "Press Enter to continue..."
}

[[ -n "${GITHUB_TOKEN:-}" ]] || {
    >&2 echo "[INFO]" "Run this script as: GITHUB_TOKEN=xxx path/to/probot-settings"
    >&2 echo "[ERR ]" "GITHUB_TOKEN required. Needs to contain a Github PAT with 'repo' permissions."
    exit 1
}

GITHUB_REPO_OWNER=$(dirname "${GITHUB_REPO_SLUG}")
GITHUB_REPO_NAME=$(basename "${GITHUB_REPO_SLUG}")

cat <<-EOF >"${TMP_FIXTURE_PAYLOAD_PATH}"
{
  "repository": {
    "owner": {
      "login": "${GITHUB_REPO_OWNER}"
    },
    "name": "${GITHUB_REPO_NAME}",
    "default_branch": "${GITHUB_REPO_DEFAULT_BRANCH}"
  },
  "ref": "refs/heads/master",
  "commits": [
    {
      "added": [],
      "modified": [
        ".github/settings.yml"
      ]
    }
  ]
}
EOF

cat <<-EOF >${TMP_NPX_SCRIPT}
#!/usr/bin/env bash
set -euo pipefail
set -x

# which probot: path/to/node_modules/.bin/probot
PROBOT=\$(which probot)
NODE_MODULES_PATH=\$(dirname \$(dirname \${PROBOT}))

\${PROBOT} receive \
  --log-level debug \
  --base-url "${GITHUB_API_URL}" \
  --event "push" \
  --payload-path "${TMP_FIXTURE_PAYLOAD_PATH}" \
  "\${NODE_MODULES_PATH}/probot-settings/index.js"
EOF

chmod +x ${TMP_NPX_SCRIPT}

exe npx --package "git+https://github.com/probot/settings.git#semver:^2.0.2" ${TMP_NPX_SCRIPT}