Add maintainer script to manage copyright headers

ruby:

  ext: ['.rb', '.rake']

  after: ['^#!', '^#.*encoding:', '^#.*frozen_string_literal:']

  comment:

    open:   '%repeat{#, :word_wrap:}%\n'

    close:   '%repeat{#, :word_wrap:}%\n\n'

    prefix: '# '

    suffix: ''

perl:

  ext: ['.pl']

  after: ['^#!', '^#.*encoding:']

  comment:

    open:   '#\n'

    close:  '#\n'

    prefix: '# '

    suffix: ''

# Support PEP 0263 comments:

# coding=<encoding name>

# -*- coding: <encoding name> -*-

# vim: set fileencoding=<encoding name> :

python:

  ext: ['.py']

  after: ['^#!', '^#.*coding:', '^#.*coding=', '^#.*fileencoding=']

  comment:

    open:   '%repeat{#, :word_wrap:}%\n'

    close:   '%repeat{#, :word_wrap:}%\n\n'

    prefix: '# '

    suffix: '#\n'

html:

  ext: ['.html', '.htm', '.xhtml']

  comment:

    open:   '<!--\n'

    close:  '-->\n'

    prefix: '    '

    suffix: ''

php:

  ext: ['.php']

  after: [ '^#!' ]

  comment:

    open:   '<?php \n/*\n'

    close:  ' */ ?>\n'

    prefix: ' * '

    suffix: ''

javacript:

  ext: ['.js', '.jsx']

  comment:

    open:   '/*\n'

    close:  ' */\n\n'

    prefix: ' * '

    suffix: ''

qml:

  ext: ['.qml']

  comment:

    open:   '/*\n'

    close:  ' */\n\n'

    prefix: ' * '

    suffix: ''

qmake_project:

  ext: ['.pro']

  comment:

    open:   '#\n'

    close:  '#\n'

    prefix: '# '

    suffix: ''

css:

  ext: ['.css']

  comment:

    open:   '/*\n'

    close:  ' */\n\n'

    prefix: ' * '

    suffix: ''

c:

  ext: ['.c', '.h']

  comment:

    open:   '/*\n'

    close:  '*/\n\n'

    prefix: '  '

    suffix: '\n'

cpp:

  ext: ['.cpp', '.hpp', '.cc', '.hh']

  comment:

    open:   '/*\n'

    close:  '*/\n\n'

    prefix: '  '

    suffix: '\n'

java:

  ext: ['.java']

  comment:

    open:   '/*\n'

    close:  ' */\n\n'

    prefix: ' * '

    suffix: ''

kotlin:

  ext: ['.kt']

  comment:

    open:   '/*\n'

    clone:  ' */\n\n'

    prefix: ' * '

    suffix: ''

golang:

  ext: ['.go']

  comment:

    open:   '/*\n'

    close:  ' */\n\n'

    prefix: ' * '

    suffix: ''

groovy:

  ext: ['.groovy']

  comment:

    open:   '/*\n'

    close:  ' */\n\n'

    prefix: ' * '

    suffix: ''

haml:

  ext: ['.haml', '.hamlc']

  comment:

    open:   '-#\n'

    close:  '-#\n'

    prefix: '-# '

    suffix: ''

coffee:

  ext: ['.coffee']

  comment:

    open:   '###\n'

    close:  '###\n'

    prefix: ''

    suffix: ''

# M4 macro language, use #, not dnl

m4:

  ext:  ['.m4']

  comment:

    open:   '#\n'

    close:  '#\n'

    prefix: '# '

    suffix: ''

am:

  ext:  ['.am']

  comment:

    open:   '##########################################################################\n'

    close:  '##########################################################################\n\n'

    prefix: '#  '

    suffix: '#\n'

ac:

  ext:  ['.ac']

  comment:

    open:   '##########################################################################\n'

    close:  '##########################################################################\n\n'

    prefix: '#  '

    suffix: '#\n'

mk:

  ext:  ['.mk']

  comment:

    open:   '##########################################################################\n'

    close:  '##########################################################################\n\n'

    prefix: '#  '

    suffix: '#\n'

# Most shells, really

shell:

  ext:  ['.sh']

  after: ['^#!']

  comment:

    open:   '%repeat{#, :word_wrap:}%\n'

    close:   '%repeat{#, :word_wrap:}%\n\n'

    prefix: '# '

    suffix: '#\n'

# Use "-- " to make sure e.g. MySQL understands it

sql:

  ext:  ['.sql']

  comment:

    open:   '-- \n'

    close:  '-- \n'

    prefix: '-- '

    suffix: ''

# XML is *not* the same as HTML, and the comments need to go after a

# preprocessing directive, if present.

# FIXME: only supports single line directives

xml:

  ext: ['.xml', '.xsd', '.mxml']

  after: ['^<\?']

  comment:

    open:   '<!--\n'

    close:  '-->\n'

    prefix: '    '

    suffix: ''

yaml:

  ext:  ['.yml', '.yaml']

  comment:

    open:   '%repeat{#, :word_wrap:}%\n'

    close:   '%repeat{#, :word_wrap:}%\n\n'

    prefix: '# '

    suffix: '#\n'

action_script:

  ext: ['.as']

  comment:

    open:   '//\n'

    close:  '//\n\n'

    prefix: '// '

    suffix: ''

sass:

  ext: ['.sass', '.scss']

  comment:

    open:   '/*\n'

    close:  ' */\n\n'

    prefix: ' * '

    suffix: ''

verilog:

  ext: ['.v', '.sv']

  comment:

    open:   '//\n'

    close:  '//\n\n'

    prefix: '// '

    suffix: ''

vhdl:

  ext: ['.vhd']

  comment:

    open:   '--\n'

    close:  '--\n\n'

    prefix: '-- '

    suffix: ''

elm:

  ext: ['.elm']

  comment:

    open: '{-\n'

    close: '-}\n\n'

    prefix: '  '

    suffix: ''

swift:

  ext: ['.swift']

  comment:

    open:   '/*\n'

    close:  ' */\n\n'

    prefix: ' * '

    suffix: ''

rust:

  ext: ['.rs']

  comment:

    open: '/*\n'

    close: ' */\n\n'

    prefix: ' * '

    suffix: ''

# Conf files i.e. apache config, splunk.conf files

conf:

  ext:  ['.conf']

  comment:

    open:   '#\n'

    close:  '#\n'

    prefix: '# '

    suffix: ''

cmake:

  ext: ['CMakeLists.txt', '.cmake']

  comment:

    open:   '%repeat{#, :word_wrap:}%\n'

    close:   '%repeat{#, :word_wrap:}%\n\n'

    prefix: '# '

    suffix: '#\n'

dockerfile:

  ext: ['Dockerfile']

  comment:

    open:   '%repeat{#, :word_wrap:}%\n'

    close:   '%repeat{#, :word_wrap:}%\n\n'

    prefix: '# '

    suffix: '#\n'

Copyright <%=eval(copyright_years[0])[:bsc].join('-')%>, Barcelona Supercomputing Center (BSC), Spain

Copyright <%=eval(copyright_years[0])[:jgu].join('-')%>, Johannes Gutenberg Universitaet Mainz, Germany

This software was partially supported by the

EC H2020 funded project NEXTGenIO (Project ID: 671951, www.nextgenio.eu).

This software was partially supported by the

ADA-FS project under the SPPEXA project funded by the DFG.

SPDX-License-Identifier: MIT

#!/bin/bash

PROJECT_DIR=$(readlink -f .)

PROJECT_CONFIG_FILE="project.config"

DOCKER_DIR="/usr/src"

INCLUDE_PATTERNS=( "*.c" "*.h" "*.cpp" "*.hpp" "*.am" "*.ac" "*.py" "*.sh" "*.mk")

EXCLUDE_PATTERNS=( ".git" "*build*" "*externals*" "*spdlog*" "*ctypesgen*" "./tests/catch.hpp" )

function help() {

cat << EOF

Usage: $(basename "$0") COMMAND [OPTIONS] [PATH]...

Add or remove license headers for each PATH specified by the user. If

no PATH is specified, the specified command is recursively applied to all files

in the current directory matching the following __default__ expressions:

  INCLUDE_PATTERNS: ${INCLUDE_PATTERNS[@]}

  EXCLUDE_PATTERNS: ${EXCLUDE_PATTERNS[@]}

These default patterns can be overriden with a '${PROJECT_CONFIG_FILE}' file.

The following commands can be used:

  -a, --add               Add license header to targets.

  -r, --remove            Remove license header from targets.

  -h, --help              Show this help message, then exit.

Additionally, the following options are supported:

  -p, --project-dir DIR   The root directory of the project's target files.

                          Defaults to '\$PWD', the current directory.

  -s, --show-targets      Don't actually execute, just show which targets would

                          be considered.

  -n, --dry-run           Don't actually execute, just show what would happen.

EOF

    exit 1

}

function parse_args() {

    show_targets_only=false

    # $@ is all command line parameters passed to the script.

    # -o is for short options like -v

    # -l is for long options with double dash like --version

    # the comma separates different long options

    options=$(getopt -l \

                "add,remove,help,project-dir:,dry-run,show-targets" \

                -o "arhp:ns" -- "$@")

    # set --:

    # If no arguments follow this option, then the positional parameters are

    # unset. Otherwise, the positional parameters are set to the arguments,

    # even if some of them begin with a ‘-’.

    eval set -- "${options}"

    while true;

    do

        OPT="$1"

        case "${OPT}" in

            -a | --add)

                PARSED_COMMAND="--add"

                ;;

            -r | --remove)

                PARSED_COMMAND="--remove"

                ;;

            -p | --project-dir)

                shift

                if [[ -z "$1" ]]; then

                    echo "option '${OPT}' requires an argument"

                    exit 1

                fi

                if ! [[ -d $1 ]]; then

                    echo "directory '${1}' does not exist."

                    exit 1

                fi

                PROJECT_DIR=$(readlink -f "$1")

                ;;

            -n | --dry-run)

                EXTRA_PROG_ARGS+=( "-n" )

                ;;

            -s | --show-targets)

                show_targets_only=true

                ;;

            --)

                shift

                EXTRA_SCRIPT_ARGS=( "$@" )

                break

                ;;

            -h | --help | *)

                help

                exit 0

                ;;

        esac

        shift

    done

    echo "-- Project directory: '${PROJECT_DIR}' --"

    if [[ -z "${PARSED_COMMAND}" ]]; then

        echo "$(basename "$0"): ERROR: no command provided"

        help

        exit 1

    fi

}

function validate_gem_version() {

    if shopt -qo xtrace; then

        return

    fi

    IFS=' .' read -r -a VERSION < <( (${COPYRIGHT_PROG} -v 2>&1) |& head -n1)

    if [[ "${VERSION[1]}" -lt 1 ]] ||

       [[ "${VERSION[2]}" -lt 0 ]] ||

       [[ "${VERSION[3]}" -lt 27 ]]; then

        echo "CopyrightHeader gem too old"

        exit 1

    fi

}

function find_command() {

    COPYRIGHT_LICENSE_HOST=$(readlink -f "${COPYRIGHT_LICENSE}")

    COPYRIGHT_LICENSE_DOCKER="${DOCKER_DIR}/"$(basename "${COPYRIGHT_LICENSE}")

    PROG_ARGS=(

        "--rm"

        "--volume=${PROJECT_DIR}:${PROJECT_DIR}"

        "--volume=${COPYRIGHT_LICENSE_HOST}:${COPYRIGHT_LICENSE_DOCKER}"

    )

    if [[ -n "${COPYRIGHT_SYNTAX}" ]]; then

        COPYRIGHT_SYNTAX_HOST=$(readlink -f "${COPYRIGHT_SYNTAX}")

        COPYRIGHT_SYNTAX_DOCKER="${DOCKER_DIR}/"$(basename "${COPYRIGHT_SYNTAX}")

        PROG_ARGS+=( "--volume=${COPYRIGHT_SYNTAX_HOST}:${COPYRIGHT_SYNTAX_DOCKER}" )

    fi

    COPYRIGHT_PROG="docker run ${PROG_ARGS[*]} gekkofs/copyright-header:latest"

    validate_gem_version

}

function print_target() {

    target="$1"

    message="$2"

    prefix="Checking "

    target_length="${#target}"

    message_length="${#message}"

    prefix_length="${#prefix}"

    maxcols=$(echo "scale=0; ($(tput cols)*0.6)/1" | bc -l)

    # the +2 and -2 accounts for quotes used when printing targets

    # the +1 for the separation space

    if [[ $((target_length + prefix_length + 2 + 1 + message_length)) -gt $maxcols ]]; then

        printf "$prefix%s\n%$(( maxcols ))s\n" "'${t}'" "${message}"

    else

        printf "$prefix%s %$(( maxcols - prefix_length - target_length - 3))s\n" "'${t}'" "${message}"

    fi

}

function find_targets() {

    TARGETS=()

    # option1: targets are passed as arguments

    if [[ -n "$*" ]]; then

        TARGETS=( "$@" )

        for t in "${TARGETS[@]}";

        do

            t="$(readlink -f ${t})"

            if [ "${t##$PROJECT_DIR}" != "${PROJECT_DIR}" ]; then

                print_target "${t}" "[SKIPPED -- outside project directory]"

            else

                PATH_ARGS+="${t}:"

            fi

        done

        return

    fi

    # option 2: targets are auto-detected based on ${PROJECT_DIR},

    # ${INCLUDE_PATTERNS}, and ${EXCLUDE_PATTERNS}

    if [[ ${#EXCLUDE_PATTERNS[@]} -ne 0 ]]; then

        for p in "${EXCLUDE_PATTERNS[@]}"; 

        do 

            exclude_args+=( -not \( -path "${p}" -prune \) )

        done

    fi

    if [[ ${#INCLUDE_PATTERNS[@]} -ne 0 ]]; then

        include_args=( \( -path "${INCLUDE_PATTERNS[0]}" \) )

        for ((i = 1; i < ${#INCLUDE_PATTERNS[@]}; ++i));

        do 

            include_args+=( -o \( -path "${INCLUDE_PATTERNS[$i]}" \) )

        done

    fi

    #### see https://stackoverflow.com/questions/23356779/how-can-i-store-the-find-command-results-as-an-array-in-bash

    while IFS= read -r -d $'\0';

    do

        TARGETS+=("$REPLY")

    done < <(find "${PROJECT_DIR}" \( "${exclude_args[@]}" \) -and \( "${include_args[@]}" \) -print0)

    for t in "${TARGETS[@]}";

    do

        if ! git ls-files --error-unmatch "${t}" > /dev/null 2>&1; then

            print_target "${t}" "[SKIPPED -- not under version control]"

        else

            print_target "${t}" "[OK]"

            PATH_ARGS+="${t}:"

        fi

    done

    if $show_targets_only; then

        exit 0

    fi

}

function read_project_config() {

    ## read project configuration

    if [[ ! -f "${PROJECT_CONFIG_FILE}" ]];

    then

        echo "ERROR: Missing project configuration file."

        exit 1

    fi

    source "${PROJECT_CONFIG_FILE}"

    ## verify mandatory options

    if [[ -z "${COPYRIGHT_LICENSE}" ]]; then

        echo "ERROR: missing COPYRIGHT_LICENSE in '${PROJECT_CONFIG_FILE}'"

        exit 1

    fi

}

function prepare_command_args() {

    ARGS=()

    # mandatory args

    ARGS+=( "--guess-extension" )

    ARGS+=( "--license-file=${COPYRIGHT_LICENSE}" )

    ARGS+=( "--output-dir=/" )

    # optional

    if [[ -n "${COPYRIGHT_SYNTAX}" ]];

    then

        ARGS+=( "--syntax=${COPYRIGHT_SYNTAX}" )

    fi

    if [[ -n "${COPYRIGHT_SOFTWARE}" ]];

    then

        ARGS+=( "--copyright-software=\"${COPYRIGHT_SOFTWARE}\"" )

    fi

    if [[ -n "${COPYRIGHT_DESCRIPTION}" ]];

    then

        ARGS+=( "--copyright-software-description=\"${COPYRIGHT_DESCRIPTION}\"" )

    fi

    if [[ -n "${COPYRIGHT_YEARS}" ]];

    then

        ARGS+=( "--copyright-year=${COPYRIGHT_YEARS}" )

    fi

    if [[ -n "${COPYRIGHT_WORD_WRAP}" ]];

    then

        ARGS+=( "--word-wrap=${COPYRIGHT_WORD_WRAP}" )

    fi

    COPYRIGHT_PROG_ARGS=( "${ARGS[@]}" )

}

function add_header() {

    # load project configuration

    read_project_config

    find_targets "$@"

    if [[ -z $PATH_ARGS ]] ; then

        echo No targets detected. Nothing to do.

        exit 0

    fi

    # prepare command to execute and its args

    find_command

    prepare_command_args

    # execute command

    ${COPYRIGHT_PROG} \

        --add-path "${PATH_ARGS::-1}" \

        "${COPYRIGHT_PROG_ARGS[@]}" \

        "${EXTRA_PROG_ARGS[@]}"

    exit $?

}

function remove_header() {

    # load project configuration

    read_project_config

    find_targets "$@"

    if [[ -z $PATH_ARGS ]]; then

        echo No targets detected. Nothing to do.

        exit 0

    fi

    # prepare command to execute and its args

    find_command

    prepare_command_args

    ${COPYRIGHT_PROG} \

        --remove-path "${PATH_ARGS::-1}" \

        "${COPYRIGHT_PROG_ARGS[@]}" \

        "${EXTRA_PROG_ARGS[@]}"

    exit $?

}

################################################################################

### Script starts here                                                       ###

################################################################################

# process command line args

if [[ $# -eq 0 ]]; then

    help

fi

parse_args "$@"

# execute selected command

case $PARSED_COMMAND in

    -a | --add)

        add_header "${EXTRA_SCRIPT_ARGS[@]}"

        ;;

    -r | --remove)

        remove_header "${EXTRA_SCRIPT_ARGS[@]}"

        ;;

esac

exit 0

# vi: filetype=sh

################################################################################

## Variables to control how the header is generated

################################################################################

# COPYRIGHT_SOFTWARE="gekkofs"