#!/usr/bin/env bash

#
# Copyright (c) 2020 Project CHIP Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

me=$(basename "$0")

# Run shellcheck on all the shell-ish files in the tree
patterns=('*.bash*' 'bash*'
    '*.ksh*' 'ksh*'
    '*.zsh*' 'zsh*'
    '.zlogin*' 'zlogin*'
    '.zlogout*' 'zlogout*'
    '.zprofile*' 'zprofile*'
    '*.sh' '.shlib*' 'shlib*'
    '.profile*' 'profile*'
    'suid_profile')

# excluding these directories (e.g. third_party/* )
excludes=()

# shellcheck disable=SC1091
[[ -f .shellcheck_tree ]] && . .shellcheck_tree

[[ ${*/--help//} != "${*}" ]] && {
    echo "Usage: $me <OPTIONS>

  Shellcheck all scripts in the tree.

  Options:
   --git      shellcheck via git ls-files, default is 'find .'
   --help     get this message

"
    exit 0
}

if [[ ${*/--git//} != "${*}" ]]; then
    #
    #  To run on git-files only
    #
    git ls-files -- "${patterns[@]}" | while read -r file; do
        for exclude in "${excludes[@]}"; do
            [[ $file =~ $exclude ]] && continue 2
        done
        shellcheck -f gcc "$file"
    done
else
    #
    # use find
    #
    exclude_args=()
    for exclude in "${excludes[@]}"; do
        exclude_args+=('!' -path "./$exclude" -a)
    done

    pattern_args=()
    for pattern in "${patterns[@]}"; do
        pattern_args+=(-o -name "$pattern")
    done

    find . "${exclude_args[@]}" '(' "${pattern_args[@]:1}" ')' -type f -exec shellcheck -f gcc {} +
fi