eslint.sh

#!/bin/bash

ARGS=()
FIX_LOG=""
WORKSPACE_DIR=$(bazel info | grep "workspace: " | cut -d' ' -f2)

function usage() {
  echo "Runs ESLint for Bazel projects"
  echo
  echo "Usage: "
  echo "$0 [-f] [bazel targets] -- [bazel options]"
  echo
  echo -e "  -f\t\t\tAttempt to fix errors"
  echo
}

# Parse CLI options
while getopts "fh" OPTION; do
  case ${OPTION} in
  f)
    FIX_LOG=$(mktemp)

    # Store build event log so we can find the produced patches latter
    ARGS=("${ARGS[@]}" "--cache_test_results=no" "--build_event_json_file=${FIX_LOG}")
    ;;
  h)
    usage
    exit 0
    ;;
  *)
    usage
    exit 10
    ;;
  esac
done

# Remove parsed args from arglist
shift $((OPTIND - 1))

bazel test \
  --build_tests_only \
  --test_tag_filters=eslint_test \
  --test_output=errors \
  "${ARGS[@]}" "$@"

if [[ -f "${FIX_LOG}" ]]; then
  JQ_SCRIPT='
  map(select(.id | has("testResult")))
  | map(.testResult.testActionOutput)
  | flatten
  | map(select(.name == "test.outputs__outputs.zip"))
  | map(.uri )
  | join("\n")'

  echo
  echo "Applying fixes..."

  # Apply fixes
  jq -r -s "${JQ_SCRIPT}" "${FIX_LOG}" |
    sed -e 's/^file:\/\///' |
    xargs -n1 unzip -p |
    patch -p0 -d "${WORKSPACE_DIR}"

  rm "${FIX_LOG}"
fi