Commit and push Gist from symlink to the gist file

gist_commit

#!/bin/bash
# set -e
# set -x

main() {
    symlink="$1"
    comment="$2"

    file=`readlink -e "$symlink"`
    where=`dirname "$file"`
    what=`basename "$file"`

    pushd "$where" >/dev/null

    git add "$what"
    git commit --quiet -m "$comment"
    git push --quiet

    popd >/dev/null
}


function check_args() {
    test -z "$1" && die_show_help
    test -z "$2" && die_show_help

    test -L "$1" || die "\"$1\" is not a symlink (to a gist)"
}


function show_help() {
    >&2 echo "Usage: $0 <symlink to gist file> <\"Git comment\">"
}


function die() {
    printf '%s\n' "$1" >&2
    exit 1
}


function die_show_help() {
    show_help
    exit 2
}


check_args "$@"

main "$@"; exit