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# shell-quote

## 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 charcter

```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


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