git-ignore

#! /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.

# set this to workaround expr problems in shFlags on freebsd
if uname -s | egrep -iq 'bsd'; then export EXPR_COMPAT=1; fi

# enable debug mode
if [ "$DEBUG" = "yes" ]; then
    set -x
fi

# The sed expression here replaces all backslashes by forward slashes.
# This helps our Windows users, while not bothering our Unix users.
# The use of readlink permit to install git-ignore using a symlink
GITIGNORE_DIR=$(readlink -f "$(echo "$0" | sed -e 's,\\,/,g')")
export GITIGNORE_DIR=$(dirname $GITIGNORE_DIR)
export GITIGNORE_VENDOR_DIR=$GITIGNORE_DIR/vendor
export GITIGNORE_CONFIG_DIR=$GITIGNORE_DIR/config

main() {
    if [ $# -lt 1 ]; then
    . "$GITIGNORE_DIR/git-ignore-help"
    	usage
    	exit 1
    fi

    # load common functionality
    . "$GITIGNORE_DIR/gitignore-common"

    # This environmental variable fixes non-POSIX getopt style argument
    # parsing, effectively breaking git-ignore subcommand parsing on several
    # Linux platforms.
    export POSIXLY_CORRECT=1

    # create the config directory
    test -e $GITIGNORE_CONFIG_DIR || mkdir $GITIGNORE_CONFIG_DIR

    # use the shFlags project to parse the command line arguments
    . "$GITIGNORE_DIR/gitignore-shFlags"
    FLAGS_PARENT="git ignore"

    # do actual parsing
    FLAGS "$@" || exit $?
    eval set -- "${FLAGS_ARGV}"

    # sanity checks
    SUBCOMMAND="$1"; shift

    if [ ! -e "$GITIGNORE_DIR/git-ignore-$SUBCOMMAND" ]; then
    	SUBCOMMAND='help'
    fi

    # run command
    . "$GITIGNORE_DIR/git-ignore-$SUBCOMMAND"
    FLAGS_PARENT="git ignore $SUBCOMMAND"

    # test if the first argument is a flag (i.e. starts with '-')
    # in that case, we interpret this arg as a flag for the default
    # command
    SUBACTION="default"
    if [ "$1" != "" ] && 
       { ! echo "$1" | grep -q "^-"; } && 
       { ! echo "$1" | grep -q ","; } && 
       issubaction "$1" ; then
    	SUBACTION="$1"; shift
    fi

    if ! type "cmd_$SUBACTION" >/dev/null 2>&1; then
    	warn "Unknown subcommand: '$SUBACTION'"
    	usage
    	exit 1
    fi

    # run the specified action
    cmd_$SUBACTION "$@"
}

main "$@"