gut

#!/bin/bash

GUT_TEMP_DIR="${HOME}/.gut_temp_dir"

help_command() {
    echo "Gut - A VCS with gut feeling."
    echo "Commands:"
    echo "  checkout [id] -- Checkout worktree to 'id' commit."
    echo "  commit [id]   -- Commit your changes."
    echo "  help          -- Prints this message."
    echo "  init          -- Initialises the current directory as a gut repository."
    echo "  log           -- View log of commits of the repository."
    echo "Built with a lot of ♥️ by SDSLabs."
}

if [ "$#" -lt 1 ]
then
	echo "[-] Invalid number of arguments."
	help_command
	exit 1
fi

if [ "$1" != "checkout" -a "$1" != "commit" -a "$1" != "help" -a "$1" != "init" -a "$1" != "log" ]
then
    echo "[-] Invalid command - ${1}"
    help_command
    exit 1
fi

if [ "$1" = "checkout" ] || [ "$1" = "commit" ]
then
    if [ "$#" -lt 2 ]
    then
        echo "[-] Invalid number of arguments."
        help_command
        exit 1
    fi
fi

if [ "$1" = "log" ]
then
    log=$(ls -A .gut)
    arr=($(echo $log | tr ' ' '\n'))
    for i in "${arr[@]}"
    do
        echo $i
    done
    exit 0
fi

if [ "$1" = "help" ]
then
    help_command
    exit 0
fi

if [ "$1" = "init" ]
then
    echo "[*] Initializing an empty gut repository..."
    test -d ".gut" || mkdir ".gut"
    echo "[+] Done!"
    exit 0
fi

if [ "$1" = "commit" ]
then
    echo "[*] Committing changes..."
    test -d ".gut/${2}"
    if [ "$?" -eq 0 ]
    then
        echo "[-] Commit with ID - ${2} - already exists"
        exit 1
    fi
    this_dir=$(pwd)
    test -d $GUT_TEMP_DIR && rm -r $GUT_TEMP_DIR
    cp -r $this_dir $GUT_TEMP_DIR
    cp -r $GUT_TEMP_DIR ".gut/${2}"
    rm -r $GUT_TEMP_DIR
    echo "[+] Committed with ID - ${2}!"
    exit 0
fi

if [ "$1" = "checkout" ]
then
    echo "[*] Checking-out to ${2} commit..."
    test -d ".gut/${2}"
    if [ "$?" -ne 0 ]
    then
        echo "[-] Couldn't find commit with ID - ${2}."
        exit 1
    fi
    rmf=$(ls -A | grep -v '.gut')
    if [ "$rmf" != "" ]
    then
        rm -r $(ls -A | grep -v '.gut')
    fi
    files=$(ls -A ".gut/${2}" | grep -v '.gut')
    arr=($(echo $files | tr '\n' '\n'))
    for i in "${arr[@]}"
    do
        cp -r ".gut/${2}/${i}" $(pwd)
    done
    echo "[+] Checked-out to commit - ${2}!"
    exit 0
fi

help_command
exit 1