#!/bin/sh

## A poor man's offline Rust playground.
#
# A simple cargo extension to setup and start a simple Rust project.
#
# Usage:
#
#   cargo play [<name>]
#
# where `<name>` is the name of the project. If no name is provided a temporary
# directory will be used instead.
#
# Requires:
#   - neovim
#   - entr (http://eradman.com/entrproject/)
#   - cargo
#
# TODO:
#   - add ability to pass `cargo init` arguments
#   - make `entr` detect new files

PLAY=""
BASE="$GIT/play"

# Check whether the script was invoked as a cargo command (i.e., `cargo play`).
[ "$1" = "play" ] && shift

if [ -z "$1" ] ; then
    PLAY=$(mktemp -d --tmpdir "rustplay_XXXXX")
else
    PLAY="$BASE/$1"
    mkdir -p "$PLAY"
    shift
fi

cd "$PLAY" || exit 1
cargo init

# Start neovim with automatic compilation on save on a side terminal
nvim '+vertical split | terminal ls src/* | entr -cs "cargo run"' '+wincmd p' src/main.rs