meta-lint

#!/bin/bash

set -e
scriptdir=$(cd $(dirname $0); pwd)
cd $scriptdir

ALL_TAGS=""
ALL_PATHS="./..."

LINT_MODULES=${LINT_MODULES:-ALL}

lint() {
  hash golangci-lint 2>&- || { echo "Need to lint GO files, but cannot find 'golangci-lint' in PATH." >&2; exit 1; }

  for i in $LINT_MODULES
  do
    tags=${i}_TAGS
    paths=${i}_PATHS
    CMD="golangci-lint run $@"
    if ! $CMD --build-tags "${!tags}" ${!paths}; then
      EXIT_CODE=1
    fi
  done
}


moreopts=1
EXIT_CODE=0
OUTPUTDIR=.
LOGFILE="meta-lint.txt"
LINTTARGET="ALL"
ADD_GIT_NOTE=1
while [[ $moreopts = 1 && $# -gt 0 ]]; do
  case "$1" in
    --about|?|help|-h|--help )
      echo -e "\nusage: $0 [module]"
      echo -e "  --topic                    - lint against the current topic"
      echo -e "  --outdir <path>            - set output directory"
      echo -e "\nRuns go meta-linters on last commit and report added issues\n"
      echo
      exit 0
      ;;
    --full|full)
      LINT_MODULES="METRIC_ENGINE SAILFISH"
      shift
      ;;
    --outdir)
      OUTPUTDIR=$2
      shift 2
      ;;
    --no-note)
      ADD_GIT_NOTE=0
      shift
      ;;
    HEAD|head|latestonly)
      # prefer "HEAD"
      ARGS="$ARGS --new-from-rev=HEAD~"
      LOGFILE="meta-lint-COMMIT-$(git rev-parse --short HEAD).txt"
      LINTTARGET="COMMIT-$(git rev-parse --short HEAD)"
      revs=$(git rev-parse --short HEAD)
      shift
      ;;
    topic|--topic)
      # prefer "topic"
      topicBranch=$(git rev-parse --abbrev-ref HEAD@{upstream} 2>/dev/null ||:)
      if [[ -z "${topicBranch}" ]]; then
        branch=$(git symbolic-ref HEAD)
        branch=${branch##refs/heads/}
        remote=$(git config "branch.${branch}.remote")
        remoteBranch=$(git config "branch.${branch}.merge")
        remoteBranch=${remoteBranch##refs/heads/}
        topicBranch="${remote:?}/${remoteBranch:?}"
      fi
      topicName=$(git symbolic-ref --short HEAD | sed 's/[^a-zA-Z0-9_-]/-/g')

      ARGS="$ARGS --new-from-rev=${topicBranch}"
      LOGFILE="meta-lint-TOPIC-${topicName}.txt"
      LINTTARGET="TOPIC-${topicName}"
      revs=$(git rev-list ${topicBranch}..HEAD --reverse)
      shift
      ;;
    *)
      moreopts=0
      ;;
  esac
done

exec 1> >(exec -a 'build logging tee' tee $OUTPUTDIR/$LOGFILE) 2>&1
logging_tee_pid=$!

echo
echo "Starting LINT against $LINTTARGET for modules $LINT_MODULES"
if [[ -n "$revs" ]]; then
  echo
  echo -e "LINT includes the following git commits:\n$revs"
  echo
fi

lint "$ARGS" "$@"
echo "Finished LINT against $LINTTARGET for modules $LINT_MODULES"
echo
if [ "$EXIT_CODE" == "0" ]; then
  echo 'GREAT JOB! Your lint run was CLEAN'
  echo 'Attach this file to your code review as proof of your brilliance!'
  echo
fi
echo "OUTPUT SAVED in $OUTPUTDIR/$LOGFILE"
echo -e "\n"
if [ "$EXIT_CODE" != "0" ]; then
  echo "THERE ARE LINTER ISSUES! Resolve the listed issues before submitting your code for review!"
  echo
fi

if [[ $ADD_GIT_NOTE = 1 ]]; then
  git notes --ref meta-lint add -fF $OUTPUTDIR/$LOGFILE
fi

# close up tee
exec 1>&0 2>&1
if [ -n "$logging_tee_pid" ];then
  while kill -0 $logging_tee_pid > /dev/null 2>&1
  do
    sleep 1
  done
fi

exit $EXIT_CODE