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Add support for grep option -v. #13

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Merged
arturadib merged 1 commit into from
May 22, 2012
Merged

Add support for grep option -v. #13

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9 changes: 7 additions & 2 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -267,12 +267,16 @@ sed(/.*DELETE_THIS_LINE.*\n/, '', 'source.js');
Reads an input string from `file` and performs a JavaScript `replace()` on the input
using the given search regex and replacement string. Returns the new string after replacement.

#### grep(regex_filter, file [, file ...])
#### grep(regex_filter, file_array)
#### grep([options ,] regex_filter, file [, file ...])
#### grep([options ,] regex_filter, file_array)
Available options:

+ `-v`: Inverse the sense of the regex and print the lines not matching the criteria.

Examples:

```javascript
grep('-v', 'GLOBAL_VARIABLE', '*.js');
grep('GLOBAL_VARIABLE', '*.js');
```

Expand Down Expand Up @@ -368,3 +372,4 @@ Returns true if all the given paths exist.
_This function is being deprecated. Use `silent(false) instead.`_

Enables all output (default)

15 changes: 12 additions & 3 deletions shell.js
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Expand Up @@ -659,18 +659,26 @@ function _sed(options, regex, replacement, file) {
exports.sed = wrap('sed', _sed);

//@
//@ #### grep(regex_filter, file [, file ...])
//@ #### grep(regex_filter, file_array)
//@ #### grep([options ,] regex_filter, file [, file ...])
//@ #### grep([options ,] regex_filter, file_array)
//@ Available options:
//@
//@ + `-v`: Inverse the sense of the regex and print the lines not matching the criteria.
//@
//@ Examples:
//@
//@ ```javascript
//@ grep('-v', 'GLOBAL_VARIABLE', '*.js');
//@ grep('GLOBAL_VARIABLE', '*.js');
//@ ```
//@
//@ Reads input string from given files and returns a string containing all lines of the
//@ file that match the given `regex_filter`. Wildcard `*` accepted.
function _grep(options, regex, files) {
options = parseOptions(options, {
'v': 'inverse'
});

if (!files)
error('no paths given');

Expand All @@ -690,7 +698,8 @@ function _grep(options, regex, files) {
var contents = fs.readFileSync(file, 'utf8'),
lines = contents.split(/\r*\n/);
lines.forEach(function(line) {
if (line.match(regex))
var matched = line.match(regex);
if ((options.inverse && !matched) || (!options.inverse && matched))
grep += line + '\n';
});
});
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4 changes: 4 additions & 0 deletions test/grep.js
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Expand Up @@ -38,6 +38,10 @@ var result = shell.grep('line', 'resources/a.txt');
assert.equal(shell.error(), null);
assert.equal(result.split('\n').length - 1, 4);

var result = shell.grep('-v', 'line', 'resources/a.txt');
assert.equal(shell.error(), null);
assert.equal(result.split('\n').length - 1, 8);

var result = shell.grep('line one', 'resources/a.txt');
assert.equal(shell.error(), null);
assert.equal(result, 'This is line one\n');
Expand Down