git-touch

#!/bin/sh
#
# git-touch - git-add new empty files with automatic directory creation
#
# Copyright (c) 2012-2015 Akinori MUSHA
#
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#

usage () {
    cat <<EOS >&2
usage: git touch <filename>...

    -v, --verbose         be verbose
    -n, --dry-run         dry run
    -k                    skip create errors
EOS
    exit 129
}

exit_status=

may_exit () {
    exit_status=${1:-$?}
    [ -z "$opt_k" ] && exit $exit_status
}

[ $# -gt 0 ] || usage

while getopts 'vnk-:' opt; do
    case "$opt" in
        [vnk])
            eval "opt_$opt=t"
            [ "$opt" = n ] && opt_v=t
            ;;
        -)
            case "$OPTARG" in
                verbose)
                    opt_v=t
                    ;;
                dry-run)
                    opt_n=t
                    opt_v=t
                    ;;
                *)
                    echo "Illegal option --$OPTARG" >&2
                    exit 64
                    ;;
            esac
            ;;
        *)
            exit 64
            ;;
    esac
done

shift $((OPTIND - 1))

top="$(git rev-parse --show-toplevel)"
status=$?

if [ -z "$top" ]; then
    exit $status
fi

for file; do
    if [ -L "$file" -o '(' -e "$file" -a ! -f "$file" ')' ]; then
        echo "Not a regular file: $file" >&2
        may_exit 1
    elif [ -f "$file" ]; then
        if [ -z "$(git ls-files -- "$file" 2>&1)" ]; then
            git add -N -- "$file"
        fi
    else
        error="$(git add -- "$file" 2>&1)"
        pathspec="$(expr "$error" : "fatal: pathspec '\(.*\)' did not match any files")"
        status=$?
        if [ -z "$pathspec" ]; then
            printf "%s\n" "$error" >&2
            may_exit $status
            continue
        fi
        [ -n "$opt_v" ] && echo "Creating $file"
        if [ -z "$opt_n" ]; then
            mkdir -p "$(dirname "$pathspec")" &&
            touch -- "$pathspec" && git add -- "$pathspec" || may_exit
        fi
    fi
done

exit $exit_status