JOLT.SH

Check it out, it's awesome!

Basic Usage

At it's core JOLT.SH allows you to run shell commands from your NodeJS codebase safely and elegantly by making use of tagged ES6 template strings. This allows you can safely interpolate JS expressions as arguments to your shell commands, yet the code look nearly like running a shell script inside your JavaScript!

 
const {$} = require('jolt.sh');
 
// $ runs commands synchronously...
 
 
$`ls`;
// terminal output:
//  a-file.ext
//  anotherfile.anotherext
 
// print file contents to shell
$`cat a-file.ext`;
 
// delete the file
$`rm a-file.ext`;
 
// safe interpolation, always!
$`rm ${"a te&&ible'filename"}`;
 

Let's get fancy

createAsyncRunner([options])

Allows you to asynchronously run commands and get their outputs without blocking the current thread.

 
const {createAsyncRunner} = require('jolt.sh');
 
// let's run some async code...
(async() => {
    const $ = createAsyncRunner();
 
    // non-blocking execution
    // contents = stdout of execution
    const contents = await $`cat a-file.ext`;
 
    // log contents on our terminal
    console.log(contents);
})();
 

createSpawnRunner([options])

For asynchronously listening to output from your commands.

 
const {createSpawnRunner} = require('jolt.sh');
 
// let's run some async code...
(async() => {
    const $ = createSpawnRunner();
 
    // monitor output from http server instance
    // and log it to current shell
    for await (const {type, text} of $`http-server .`) {
        // type = 'stdout' | 'stderr'
        // text <=> console output text
 
        console.log(`${type}:\n${text}\n`);
    }
})();
 

context([options])

Regular runners only allow an isolated command to be called. However context() solves this problem by allowing commands to elegantly and safely be concatenated.

 
const {context} = require('jolt.sh');
 
const serveDir = "my public dir";
 
// cd into a directory and serve files from it
// equivalent to running $`cd ${serveDir} && http-server .`
const activity = context([options]).spawn(($) => {
    // now we can `cd` into a directory and serve files from it
    $`cd ${serveDir}` // `cd my\ public\ dir`
    $`http-server .`;
})
 
// let's run some async code...
(async() => {
 
    // monitor output from http server above
    for await (const {type, text} of activity) {
 
        console.log(`${type}:\n${text}\n`);
    }
})();
 
// or sync
context().run(($) => {
 
    // cd into a directory and read a file in it.
    $`cd somedir`;
    $`cat a-file-inside-somedir.txt`;
});
 
// or simple async
(async() => {
    const fileContents = await context().async(($) => {
        $`cd somedir`;
        $`cat a-file-inside-somedir.txt`;
    });
 
    // afterwards log file contents...
    console.log(`file contents:\n${fileContents}\n`);
})();
 

Are you happy?

Is there something here that isn't clear?

If so send me an email or open an issue with the documentation tag.

Is there something awesome you wish JOLT.SH would do?

If so, open an issue and let the discussion begin!

Oh, and by the way, JOLT.SH uses 0 third-party dependencies!

Cheers!

Gabe