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detect-indent

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detect-indent - npm Package Compare versions

Comparing version
0.1.4
 to
0.2.0
+54
cli.js
#!/usr/bin/env node
'use strict';
var fs = require('fs');
var stdin = require('get-stdin');
var argv = require('minimist')(process.argv.slice(2));
var pkg = require('./package.json');
var detectIndent = require('./');
var input = argv._[0];
function help() {
console.log([
pkg.description,
'',
'Usage',
' $ detect-indent <file>',
' $ echo <string> | detect-indent',
'',
'Example',
' $ echo \' foo\\n bar\' | detect-indent | wc --chars',
' 2'
].join('\n'));
}
function init(data) {
var indent = detectIndent(data);
if (indent !== null) {
process.stdout.write(indent);
} else {
console.error('Indentation could not be detected');
process.exit(2);
}
}
if (argv.help) {
help();
return;
}
if (argv.version) {
console.log(pkg.version);
return;
}
if (process.stdin.isTTY) {
if (!input) {
help();
return;
}
init(fs.readFileSync(input, 'utf8'));
} else {
stdin(init);
}
+63
index.js
'use strict';
var RE_MULTILINE_COMMENTS = /\/\*[\S\s]*?\*\//;
var RE_EMPTY_LINE = /^\s*$/;
var RE_LEADING_WHITESPACE = /^[ \t]+/;
function gcd(a, b) {
return b ? gcd(b, a % b) : a;
}
module.exports = function (str) {
if (typeof str !== 'string') {
throw new TypeError('Expected a string');
}
var lines = str.replace(RE_MULTILINE_COMMENTS, '').split(/\r?\n/);
var tabs = 0;
var spaces = [];
for (var i = 0; i < lines.length; i++) {
var line = lines[i];
if (RE_EMPTY_LINE.test(line)) {
continue;
}
var matches = line.match(RE_LEADING_WHITESPACE);
if (matches) {
var whitespace = matches[0];
var len = whitespace.length;
if (whitespace.indexOf('\t') !== -1) {
tabs++;
}
// convert odd numbers to even numbers
if (len % 2 === 1) {
len += 1;
}
if (whitespace.indexOf(' ') !== -1) {
spaces.push(len);
}
}
}
if (tabs > spaces.length) {
return '\t';
}
if (spaces.length === 0) {
return null;
}
// greatest common divisor is most likely the indent size
var indentSize = spaces.reduce(gcd);
if (indentSize > 0) {
return new Array(indentSize + 1).join(' ');
}
return null;
}
+27
-24
package.json
{
"name": "detect-indent",
"version": "0.1.4",
"version": "0.2.0",
"description": "Detect the indentation of code",
"license": "MIT",
"repository": "sindresorhus/detect-indent",
"bin": {
"detect-indent": "cli.js"
},
"author": {
"name": "Sindre Sorhus",
"email": "sindresorhus@gmail.com",
"url": "http://sindresorhus.com"
},
"engines": {
"node": ">=0.10.0"
},
"scripts": {
"test": "mocha"
},
"files": [
"index.js",
"cli.js"
],
"keywords": [
"cli",
"bin",
"indent",

@@ -18,28 +40,9 @@ "indentation",

],
"license": "MIT",
"author": {
"name": "Sindre Sorhus",
"email": "sindresorhus@gmail.com",
"url": "http://sindresorhus.com"
"dependencies": {
"get-stdin": "^0.1.0",
"minimist": "^0.1.0"
},
"files": [
"detect-indent.js"
],
"main": "detect-indent",
"repository": {
"type": "git",
"url": "git://github.com/sindresorhus/detect-indent.git"
},
"scripts": {
"test": "mocha && phantomjs node_modules/mocha-phantomjs/lib/mocha-phantomjs.coffee test/test.html"
},
"devDependencies": {
"mocha": "~1.12.0",
"chai": "~1.7.2",
"phantomjs": "~1.9.1",
"mocha-phantomjs": "~3.1.0"
},
"engines": {
"node": ">=0.8.0"
"mocha": "*"
}
}
+23
-16
readme.md

@@ -17,27 +17,15 @@ # detect-indent [![Build Status](https://travis-ci.org/sindresorhus/detect-indent.svg?branch=master)](https://travis-ci.org/sindresorhus/detect-indent)

Download [manually](https://github.com/sindresorhus/detect-indent/releases) or with a package-manager.
```bash
```sh
$ npm install --save detect-indent
```
```bash
$ bower install --save detect-indent
```
```bash
$ component install sindresorhus/detect-indent
```
## Usage
## API
Accepts a string and returns the indentation or `null` if it can't be detected.
## Usage
Modify a JSON file while persisting the indentation in Node.js.
```js
// modify a JSON file while persisting the indentation in Node
var fs = require('fs');

@@ -66,4 +54,23 @@ var detectIndent = require('detect-indent');

## CLI
```sh
$ npm install --global detect-indent
```
```sh
$ detect-indent --help
Usage
$ detect-indent <file>
$ echo <string> | detect-indent
Example
$ echo ' foo\n bar' | detect-indent | wc --chars
2
```
## License
[MIT](http://opensource.org/licenses/MIT) © [Sindre Sorhus](http://sindresorhus.com)
MIT © [Sindre Sorhus](http://sindresorhus.com)
-77
detect-indent.js
/*!
detect-indent
by Sindre Sorhus
https://github.com/sindresorhus/detect-indent
MIT License
*/
(function () {
'use strict';
var RE_MULTILINE_COMMENTS = /\*(.|[\r\n])*?\*/;
var RE_EMPTY_LINE = /^\s+$/;
var RE_LEADING_WHITESPACE = /^[ \t]+/;
function gcd(a, b) {
return b ? gcd(b, a % b) : a;
}
function detectIndent(str) {
if (typeof str !== 'string') {
throw new Error('Argument must be a string.');
}
var lines = str.replace(RE_MULTILINE_COMMENTS, '').split(/\n|\r\n?/);
var tabs = 0;
var spaces = [];
for (var i = 0; i < lines.length; i++) {
var line = lines[i];
if (RE_EMPTY_LINE.test(line)) {
continue;
}
var matches = line.match(RE_LEADING_WHITESPACE);
if (matches) {
var whitespace = matches[0];
var len = whitespace.length;
if (whitespace.indexOf('\t') !== -1) {
tabs++;
}
// convert odd numbers to even numbers
if (len % 2 === 1) {
len += 1;
}
if (whitespace.indexOf(' ') !== -1) {
spaces.push(len);
}
}
}
if (tabs > spaces.length) {
return '\t';
}
if (spaces.length === 0) {
return null;
}
// greatest common divisor is most likely the indent size
var indentSize = spaces.reduce(gcd);
if (indentSize > 0) {
return new Array(indentSize + 1).join(' ');
}
return null;
};
if (typeof module !== 'undefined' && module.exports) {
module.exports = detectIndent;
} else {
window.detectIndent = detectIndent;
}
})();