mockingbird

#!/usr/bin/env bash
# ::DESCRIPTION
# Launcher that downloads a versioned release artifact if no executable exists.
#
# ::OVERRIDES
# Usage: export <option>=<value>
# - MKB_VERSION: The release artifact version.
# - MKB_ARTIFACTS_URL: A templated URL in the format `https://example.com/<VERSION>/<FILE>`.
# - MKB_NO_VERIFY: Disable verifying the code signature of downloaded artifacts.

set -eu

readonly srcroot="$(dirname "$0")"
pushd . > /dev/null
cd "${srcroot}"

function getVersion {
  /usr/libexec/PlistBuddy -c 'Print :CFBundleShortVersionString' Sources/MockingbirdCli/Info.plist
}
readonly version="${MKB_VERSION:-"$(getVersion)"}"
echo "Using Mockingbird v${version}"

readonly binDir="bin"
readonly executable="${binDir}/${version}/mockingbird"
mkdir -p "${binDir}"

if [[ ! -x "${executable}" ]]; then
  readonly archiveName='Mockingbird'
  readonly archiveFileName="${archiveName}.zip"
  curlOpts=( --progress-bar --location --output "${binDir}/${archiveFileName}" )
  if [[ -n "${GH_ACCESS_TOKEN+x}" ]]; then
    curlOpts+=( --header "Authorization: token ${GH_ACCESS_TOKEN}" )
  fi

  # Download
  readonly artifactsUrl="${MKB_ARTIFACTS_URL:-https://github.com/birdrides/mockingbird/releases/download/<VERSION>/<FILE>}"
  readonly downloadUrl="$(echo "${artifactsUrl}" | sed "s|<VERSION>|${version}|" | sed "s|<FILE>|${archiveFileName}|")"
  echo "Downloading Mockingbird from ${downloadUrl} into ${binDir}/${version}"
  curl "${curlOpts[@]}" "${downloadUrl}"

  # Extract
  unzip -oq "${binDir}/${archiveFileName}" -d "${binDir}"
  rm "${binDir}/${archiveFileName}"
  rm -rf "${binDir}/${version}"
  mv -f "${binDir}/${archiveName}" "${binDir}/${version}"

  # Verify
  if [[ "${MKB_NO_VERIFY:-}" -ne 1 ]]; then
    if xcrun codesign -vv -R Sources/MockingbirdAutomationCli/Resources/CodesigningRequirements/mockingbird.txt "${executable}"; then
      echo '✅ Verified the code signature'
    else
      echo "error: Mockingbird does not have a valid code signature; set 'MKB_NO_VERIFY=1' to bypass this error at your own risk"
      rm "${executable}"
      exit 1
    fi
  fi
  chmod u+x "${executable}"
fi

popd > /dev/null
MKB_LAUNCHER="$0" "${srcroot}/${executable}" "$@"