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@tehshrike/shell-escape-tag

v1.2.2

Published

shell-escape-tag, but with a much smaller install size

Downloads

152

Readme

@tehshrike/shell-escape-tag

shell-escape-tag, but with a much smaller install size

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 → command: string

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

escape

Signature: ...any → Object

let params   = [ 'foo bar', "baz's quux" ]
let command1 = shell.escape('command', params)
let command2 = shell`command ${params}`

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

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 is passed through verbatim when passed as a direct or nested parameter to shell, shell.escape, or shell.preserve.

preserve

Aliases: protect, verbatim

Signature: ...any → Object

let params   = [ 'foo bar', shell.preserve("baz's quux") ]
let command1 = shell.escape('command', params)
let command2 = shell`command ${params}`

console.log(command1) // command 'foo bar' baz's quux
console.log(command2) // command 'foo bar' 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 passed as a direct or nested parameter to shell, shell.escape, or shell.preserve.

DEVELOPMENT

NPM Scripts

The following NPM scripts are available:

  • test - lint the codebase, compile the library, and run the test suite

Gulp Tasks

The following Gulp tasks are available:

  • build - compile the library and save it to the target directory
  • clean - remove the target directory and its contents
  • default - run the lint and build tasks
  • dump:config - print the build config settings to the console
  • lint - check and report style and usage errors in the gulpfile, source file(s) and test file(s)

SEE ALSO

  • any-shell-escape - Escape and stringify an array of arguments to be executed on the shell
  • execa - A better child_process
  • shell-tag - Run shell commands inline in JavaScript with ES6 template strings

COPYRIGHT AND LICENSE

Copyright © 2015-2018 by chocolateboy.

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