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shell-escape-tag

v2.0.2

Published

An ES6 template tag which escapes parameters for interpolation into shell commands

Downloads

2,002

Readme

shell-escape-tag

Build Status NPM Version

An ES6 template tag which escapes parameters for interpolation into shell commands

INSTALL

$ npm install shell-escape-tag

SYNOPSIS

import shell from 'shell-escape-tag'

let filenames = glob('Holiday Snaps/*.jpg')
let title     = 'Holiday Snaps'
let command   = shell`compress --title ${title} ${filenames}`

console.log(command) // compress --title 'Holiday Snaps' 'Holiday Snaps/Pic 1.jpg' 'Holiday Snaps/Pic 2.jpg'

DESCRIPTION

This module exports an ES6 tagged-template function which escapes (i.e. quotes) its parameters for safe inclusion in shell commands. Parameters can be strings, arrays of strings, or nested arrays of strings, arrays and already-processed parameters.

The exported function also provides two helper functions which respectively escape and preserve their parameters and protect them from further processing.

EXPORTS

shell (default)

Signature: (template: string) ⇒ string

import shell from 'shell-escape-tag'

let filenames = ['foo bar', "baz's quux"]
let title     = 'My Title'
let command   = shell`command --title ${title} ${filenames}`

console.log(command) // command --title 'My Title' 'foo bar' 'baz'"'"'s quux'

Takes a template literal and escapes any interpolated parameters. null and undefined values are ignored. Arrays are flattened and their elements are escaped and joined with a space. All other values are stringified i.e. false is mapped to "false" etc. Parameters that have been escaped with shell.escape or preserved with shell.preserve are passed through verbatim.

FUNCTIONS

shell.escape

Signature: (...args: any[]) ⇒ object

import shell from 'shell-escape-tag'

let escaped = shell.escape("foo's bar")
let command1 = `command ${escaped}`
let command2 = shell`command ${escaped}`

console.log(command1) // command 'foo'"'"'s bar'
console.log(command2) // command 'foo'"'"'s bar'

Flattens, compacts and escapes any parameters which haven't already been escaped or preserved, joins the resulting elements with a space, and wraps the resulting string in an object which remains escaped when embedded in a template or passed as a direct or nested parameter to shell, shell.escape, or shell.preserve.

shell.preserve

Aliases: protect, verbatim

Signature: (...args: any[]) → object

import shell from 'shell-escape-tag'

let preserved = shell.preserve("baz's quux")
let command1 = `command "${preserved}"`
let command2 = shell`command "${preserved}"`

console.log(command1) // command "baz's quux"
console.log(command2) // command "baz's quux"

Flattens, compacts and preserves any parameters which haven't already been escaped or preserved, joins the resulting elements with a space, and wraps the resulting string in an object which is passed through verbatim when embedded in a template or passed as a direct or nested parameter to shell, shell.escape, or shell.preserve.

DEVELOPMENT

NPM Scripts

The following NPM scripts are available:

  • build - compile the code and save it to the dist directory
  • clean - remove the dist directory and other build artifacts
  • rebuild - clean the build artifacts and recompile the code
  • test - clean and rebuild and run the test suite
  • test:run - run the test suite

COMPATIBILITY

SEE ALSO

  • any-shell-escape - Escape and stringify an array of arguments to be executed on the shell
  • execa - A better child_process
  • @perl/qw - A template tag for quoted word literals like Perl's qw(...)
  • @perl/qx - A template tag to run a command and capture its output like Perl's qx(...)

VERSION

2.0.2

AUTHOR

chocolateboy

COPYRIGHT AND LICENSE

Copyright © 2015-2019 by chocolateboy.

This is free software; you can redistribute it and/or modify it under the terms of the Artistic License 2.0.