gistit

#!/usr/bin/env bash

usage() {
    cat << _EOF_
usage: $_app [option] <file|code>

  options:
    -p              create a private gist
    -g              get gist specified by its code
    -c              clone gist specified by its code
    -h              print this help message
_EOF_
}

perror() {
    printf "%s: %s\n" "$_app" "$@" >&2
    exit 1
}

gist() {
    [[ -f $1 ]] || perror "not a file: $1"
    local gisturl='https://gist.github.com/gists'
    local user token filename fileext response
    filename="$1"
    user="$(git config --global github.user)" || perror "no github user set"
    token="$(git config --global github.token)" || perror "no github token set"
    fileext="${filename##*.}"
    [[ $filename == $fileext ]] && fileext="txt"
    gistit="curl --include --silent \
        --data-urlencode private$private \
        --data-urlencode login=$user --data-urlencode token=$token \
        --data-urlencode file_name[gistfile1]=$filename \
        --data-urlencode file_ext[gistfile1]=$fileext \
        --data-urlencode file_contents[gistfile1]@$filename $gisturl"
    response="$(sed -nr '/Location/{s/.+: (.+)/\1/p}' < <($gistit))" || perror "failed to gistit"
    xclip -i <<< "$response"
    printf "%s: %s\n" "gisted at" "$response"
}

private() {
    local private="=on"
    gist "$@"
}

get() {
    local file="$1" gisturl='https://gist.github.com'
    while [[ -f "$file.txt" ]]
    do file="$file-$RANDOM"
    done
    curl --silent "$gisturl/$1.txt" > "$file.txt" || perror "failed to fetch file"
    xclip -i <<< "$PWD/$file.txt"
    printf "%s: %s\n" "gist stored at" "$file.txt"
}

clone() {
    local dir="$1" gisturl='git://gist.github.com'
    while [[ -d $dir ]]
    do dir="$1-$RANDOM"
    done
    git clone "git://gist.github.com/$1.git" "$dir" || perror "failed to clone gist"
    xclip -i <<< "$PWD/$dir"
    printf "%s: %s\n" "gist cloned at" "$dir"
}

_app="${0##*/}"

which git &>/dev/null || perror "missing dependency: git"
which curl &>/dev/null || perror "missing dependency: curl"
which xclip &>/dev/null || perror "missing dependency: xclip"
(( $# > 2 )) && perror "too many arguments"

while (( $# )); do
    case $1 in
        -h) usage
            exit 0
            ;;
        -p) shift
            private "$@"
            exit 0
            ;;
        -c) shift
            clone "$@"
            exit 0
            ;;
        -g) shift
            get "$@"
            exit 0
            ;;
        -*) usage
            exit 1
            ;;
        *) gist "$@"
            exit 0
            ;;
    esac
done

usage
exit 1