superlint

#!/bin/bash

set -eu

cmd(){ echo $(basename $0); }

show_help() {
  echo "\
  Usage:
  $(cmd) [OPTION...]
  -r, --remote; Set remote to diff against when determining which files to lint
  -b, --branch; Set the base remote branch to diff against, default is the HEAD branch
  -a, --lint-all; Ignore diff and lint entire code base
  " | column -t -s ";"
}

UPSTREAM=origin
LINT_ALL=false
BRANCH=

while test $# -gt 0; do
    case "$1" in
        -h|-\?|--help)
            show_help
            exit
            ;;
        -r|--remote)
            if [ "$2" ]; then
                UPSTREAM=$2
                shift
            else
                echo 'ERROR: "--remote" requires a non-empty option argument.'
                exit 1
            fi
            ;;
        -b|--branch)
            if [ "$2" ]; then
                BRANCH=$2
                shift
            else
                echo 'ERROR: "--branch" requires a non-empty option argument.'
                exit 1
            fi
            ;;
        -a|--lint-all)
            LINT_ALL=true
            ;;
        --) # End of all options.
            shift
            break
            ;;
        -?*)
            printf 'WARN: Unknown option (ignored): %s\n' "$1" >&2
            ;;
    esac

    shift
done

SUPER_LINTER_DIR=$(echo ${BASH_SOURCE[0]} | sed 's/\/superlint//')

echo "rebuilding the super-linter image..."
docker build -t super-linter $SUPER_LINTER_DIR >/dev/null

GIT_ROOT=$(git rev-parse --show-toplevel)
MAIN_BRANCH=${BRANCH:-$(git remote show $UPSTREAM | grep "HEAD branch" | sed 's/.*: //')}
if ${LINT_ALL}; then
  MOUNTS="-v ${GIT_ROOT}:/tmp/lint/"
  echo "super-linter will lint all files in: $GIT_ROOT"
else
  MOUNTS="-v ${GIT_ROOT}/.git:/tmp/lint/.git"
  echo "super-linter will lint the following files:"
  DIFF=$(git diff --name-only $MAIN_BRANCH)
  for FILE in $DIFF;
  do
    echo "    ${GIT_ROOT}/${FILE}"
    MOUNTS="$MOUNTS -v ${GIT_ROOT}/${FILE}:/tmp/lint/${FILE}"
  done
fi

echo "--- Running super-linter"
exec docker run --rm -e LOG_LEVEL=ERROR -e RUN_LOCAL=true $MOUNTS super-linter