minimal, no dependencies task runner for deno.

Taskfile.js

// Command line usage examples:
// 1: deno run --allow-run ./Taskfile.js start
// 2: deno run --allow-run ./Taskfile.js echo "what?"
// 3: deno run --allow-run ./Taskfile.js do-stuff one two three


run(Deno.args, {
  start() {
    exec.cmd('deno run ./src/index.js');
  },
  echo(str) {
    return exec(['echo', str ,"\nThis is javascript, y'all"]);
  },
  async ['do-stuff'](...args) {
    if(true) {
      await this.echo(`Testing ${args.join(' ')}`);
    }
  }
});


function run([name, ...args], tasks) {
  name in tasks 
    ? tasks[name](...args) 
    : console.log(`Task "${name}" not found`);
}

async function exec(cmd) {
  const proc = await Deno.run({ cmd }).status();

  if(proc.success == false) {
    Deno.exit(proc.code);
  }

  return proc;
}

exec.cmd = function(raw_cmd) {
  return exec(split(raw_cmd));
};

// taken from: https://github.com/gpasq/deno-exec
function split(command) {
  var myRegexp = /[^\s"]+|"([^"]*)"/gi;
  var splits = [];

  do {
    //Each call to exec returns the next regex match as an array
    var match = myRegexp.exec(command);
    if (match != null) {
      //Index 1 in the array is the captured group if it exists
      //Index 0 is the matched text, which we use if no captured group exists
      splits.push(match[1] ? match[1] : match[0]);
    }
  } while (match != null);

  return splits;
}

This is not meant to be a module you download, but something you would write in the root of your project to execute external commands or automate some simple tasks.

These are proper task runner for deno:

• velociraptor
• denox
• drake