npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

sh-template-tag

v4.0.2

Published

string template tags for safely composing shell strings

Downloads

78

Readme

sh Template Tag

Build Status Dependencies Status npm Coverage Status Install Size Known Vulnerabilities

Provides a string template tag that makes it easy to compose sh and bash command strings by escaping dynamic values based on the context in which they appear.

Usage Example

const { sh, ShFragment } = require('sh-template-tag')

function echoCommand (a, b, c) {
  return sh`echo -- ${a} "${b}" 'c: ${c}'`
}

console.log(
  '%s',
  echoCommand(
    '; rm -rf / #',
    '$(cat /etc/shadow)',
    '\'"$(cat /etc/shadow)"\n#'))

/*

Logs the below which does not spawn any subshells:

echo -- '; rm -rf / #' "\$(cat /etc/shadow)" 'c: '"'"'"$(cat /etc/shadow)"
#'

*/

API

sh`...`

A tag handler that escapes values so that they contribute the literal characters, returning an ShFragment.

ShFragments are not escaped when they appear outside quotes.

ShFragment(str)

A TypedString subclass that specifies a fragment of a shell command suitable for embedding outside a quoted string and which has balanced delimiters.

ShFragments are mintable so to create one, do

const { Mintable } = require('node-sec-patterns')
const { ShFragment } = require('sh-template-tag')

const makeShFragment = Mintable.minterFor(ShFragment, (x) => String(x))

const myShFragment = makeShFragment('echo Hello;')

Caveats

"Library support for Safe Coding Practices"

Solving shell injection is a much harder problem than query injection since shell scripts tend to call other shell scripts, so properly escaping arguments to one script doesn't help if the script sloppily composes a sub-shell.