#!/bin/bash

usage_brief()
{
    echo "Usage: nogit <command>"
    echo ""
    echo "Available commands are:"
    echo ""
    echo "    nogit clone"
    echo "    nogit sync"
    echo ""
    echo "See 'nogit help' for more details"
}

usage()
{
    echo "Usage: nogit <command>"
    echo ""
    echo "Possible commands are described below:"
    echo ""
    echo "nogit clone <command>"
    echo ""
    echo "    Clone a nogit repository into the current directory."
    echo "    This differs from 'git clone' in that it will not create"
    echo "    a new top-level directory but will instead clone the"
    echo "    resulting files into the current directory (which may"
    echo "    already be a local git repository). The object store for"
    echo "    this newly-cloned repository will be a directory named"
    echo "    .nogit rather than .git."
    echo ""
    echo "    The repository to be cloned should be a nogit repository"
    echo "    in the sense that its files are intended to be managed"
    echo "    according to nogit semantics. But other than that, the"
    echo "    repository to be cloned is an actual git repository."
    echo ""
    echo "nogit sync"
    echo ""
    echo "    Synchronize local and remote changes"
    echo ""
    echo "    For all files managed by a previously-cloned nogit repository"
    echo "    this command will:"
    echo ""
    echo "        * Commit local changes (auto-generated commit message)"
    echo ""
    echo "        * Pull down any new commits from the remote"
    echo ""
    echo "        * Auto-merge local and remote (keeping both sides and"
    echo "          with an auto-generated commit message)"
    echo ""
    echo "        * Push out any new commits generated locally"
}

nogit_clone()
{
    echo "Internal error: 'nogit clone' not yet implemented"
}

nogit_sync()
{
    echo "Internal error: 'nogit sync' not yet implemented"
}

if [ $# -lt 1 ]; then
    echo "Error: missing command name." >&2
    echo ""
    usage_brief >&2
    exit 1
fi

cmd="$1"

case "$cmd" in
    clone)
        nogit_clone
    ;;
    sync)
        nogit_sync
    ;;
    help)
        usage
        exit 0
    ;;
    *)
        echo "Error: Unknown command: $cmd" >&2
        echo ""
        usage_brief >&2
        exit 1
        ;;
esac