git-ignore-create

#! /bin/bash
# The MIT License
#
# Copyright 2013 Eric VILLARD <dev@eviweb.fr>.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

usage() {
    echo ""
    echo "Create a git ignore file."
    echo ""
    echo "usage: git ignore create [-f] [-g] [-d <directory>] [<pattern1>,<pattern2>,...]"
    echo ""
    echo "Available options :"
    echo "  -f                          force the replacement of an existing .gitignore file"
    echo "  -g                          make ignore file global"
    echo "  -d <directory>              target directory to create the file in"
    echo ""
    echo "Parameters :"
    echo "  <pattern1>,<pattern2>,...   comma separated list of patterns to include"
    echo ""
    echo "Patterns are the ones listed by the list subcommand and are case sensitive"
    echo ""
}

parse_args() {
    # parse options
    FLAGS "$@" || exit $?
    eval set -- "${FLAGS_ARGV}"

    # save patterns in a global variable
    PATTERNS=$1
}

cmd_default() {
    cmd_create "$@"
}

cmd_create() {
    DEFINE_boolean force false 'replace existing file without prompt' f
    DEFINE_boolean global false 'add the file to the core.excludesfile global configuration' g
    DEFINE_string directory '.' '.gitignore target directory' d
    parse_args "$@"

    if [[ ! -e $FLAGS_directory ]]; then
        mkdir -p $FLAGS_directory
    fi

    local file=$FLAGS_directory/.gitignore

    if [[ -e "$file" ]] && noflag force; then
        while true; do
            read -p "$FLAGS_directory/.gitignore already exists, overwrite (y|n) ? " yn
            case $yn in
                [Yy]* ) break;;
                [Nn]* ) exit;;
                * ) echo "Please answer yes or no.";;
            esac
        done
    fi

    local content="$(mergepatterns $PATTERNS)"
    echo "$content" > $file
    
    if flag global; then
        setglobal $file
    fi
}

cmd_help() {
    usage
    exit 0
}