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# shell-quote
Parse and quote shell commands.
# example
## quote
``` js
var quote = require('shell-quote').quote;
var s = quote([ 'a', 'b c d', '$f', '"g"' ]);
console.log(s);
```
output
```
a 'b c d' \$f '"g"'
```
## parse
``` js
var parse = require('shell-quote').parse;
var xs = parse('a "b c" \\$def \'it\\\'s great\'');
console.dir(xs);
```
output
```
[ 'a', 'b c', '\\$def', 'it\'s great' ]
```
## parse with an environment variable
``` js
var parse = require('shell-quote').parse;
var xs = parse('beep --boop="$PWD"', { PWD: '/home/robot' });
console.dir(xs);
```
output
```
[ 'beep', '--boop=/home/robot' ]
```
## parse with custom escape character
``` js
var parse = require('shell-quote').parse;
var xs = parse('beep --boop="$PWD"', { PWD: '/home/robot' }, { escape: '^' });
console.dir(xs);
```
output
```
[ 'beep', '--boop=/home/robot' ]
```
## parsing shell operators
``` js
var parse = require('shell-quote').parse;
var xs = parse('beep || boop > /byte');
console.dir(xs);
```
output:
```
[ 'beep', { op: '||' }, 'boop', { op: '>' }, '/byte' ]
```
## parsing shell comment
``` js
var parse = require('shell-quote').parse;
var xs = parse('beep > boop # > kaboom');
console.dir(xs);
```
output:
```
[ 'beep', { op: '>' }, 'boop', { comment: '> kaboom' } ]
```
# methods
``` js
var quote = require('shell-quote').quote;
var parse = require('shell-quote').parse;
```
## quote(args)
Return a quoted string for the array `args` suitable for using in shell
commands.
## parse(cmd, env={})
Return an array of arguments from the quoted string `cmd`.
Interpolate embedded bash-style `$VARNAME` and `${VARNAME}` variables with
the `env` object which like bash will replace undefined variables with `""`.
`env` is usually an object but it can also be a function to perform lookups.
When `env(key)` returns a string, its result will be output just like `env[key]`
would. When `env(key)` returns an object, it will be inserted into the result
array like the operator objects.
When a bash operator is encountered, the element in the array with be an object
with an `"op"` key set to the operator string. For example:
```
'beep || boop > /byte'
```
parses as:
```
[ 'beep', { op: '||' }, 'boop', { op: '>' }, '/byte' ]
```
# install
With [npm](http://npmjs.org) do:
```
npm install shell-quote
```
# license
MIT