init

.editorconfig

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+# editorconfig.org
+root = true
+
+[*]
+indent_style = tab
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false

.gitattributes

@@ -0,0 +1 @@
+* text=auto

.gitignore

@@ -0,0 +1 @@
+node_modules

.jshintrc

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+{
+	"node": true,
+	"esnext": true,
+	"bitwise": true,
+	"camelcase": true,
+	"curly": true,
+	"eqeqeq": true,
+	"immed": true,
+	"indent": 4,
+	"latedef": true,
+	"newcap": true,
+	"noarg": true,
+	"quotmark": "single",
+	"regexp": true,
+	"undef": true,
+	"unused": true,
+	"strict": true,
+	"trailing": true,
+	"smarttabs": true
+}

.travis.yml

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+language: node_js
+node_js:
+  - '0.10'

index.js

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+'use strict';
+var crypto = require('crypto');
+var path = require('path');
+var es = require('event-stream');
+
+function md5(str) {
+	return crypto.createHash('md5').update(str, 'utf8').digest('hex');
+}
+
+module.exports = function (data, options) {
+	return es.map(function (file, cb) {
+		var filename = md5(file.contents.toString()).slice(0, 8) + '.' + path.basename(file.path);
+		file.path = path.join(path.dirname(file.path), filename);
+		cb(null, file);
+	});
+};

package.json

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+{
+  "name": "gulp-rev",
+  "version": "0.0.0",
+  "description": "Static asset revisioning by prepending content hash to filenames: unicorn.css => 098f6bcd.unicorn.css",
+  "license": "MIT",
+  "repository": "sindresorhus/gulp-rev",
+  "author": {
+    "name": "Sindre Sorhus",
+    "email": "[email protected]",
+    "url": "http://sindresorhus.com"
+  },
+  "engines": {
+    "node": ">=0.8.0"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "gulpplugin",
+    "rev",
+    "revision",
+    "hash",
+    "optimize",
+    "version",
+    "versioning",
+    "cache",
+    "expire",
+    "static",
+    "asset",
+    "assets"
+  ],
+  "dependencies": {
+    "event-stream": "~3.0.20"
+  },
+  "devDependencies": {
+    "gulp-util": "~2.1.3",
+    "mocha": "*"
+  }
+}

readme.md

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+# [gulp](https://github.com/wearefractal/gulp)-rev [![Build Status](https://secure.travis-ci.org/sindresorhus/gulp-rev.png?branch=master)](http://travis-ci.org/sindresorhus/gulp-rev)
+
+> Static asset revisioning by prepending content hash to filenames  
+`unicorn.css` => `098f6bcd.unicorn.css`
+
+Make sure to set the files to [never expire](http://developer.yahoo.com/performance/rules.html#expires) for this to have an effect.
+
+
+## Install
+
+Install with [npm](https://npmjs.org/package/gulp-rev)
+
+```
+npm install --save-dev gulp-rev
+```
+
+
+## Example
+
+```js
+var gulp = require('gulp');
+var rev = require('gulp-rev');
+
+gulp.task('default', function () {
+	gulp.src('src/*.css')
+		.pipe(rev())
+		.pipe(gulp.dest('dist'));
+});
+```
+
+
+## License
+
+MIT © [Sindre Sorhus](http://sindresorhus.com)

test.js

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+'use strict';
+var assert = require('assert');
+var path = require('path');
+var gutil = require('gulp-util');
+var rev = require('./index');
+
+it('should rev files', function (cb) {
+	var stream = rev();
+
+	stream.on('data', function (data) {
+		assert.equal(data.path, '~/dev/foo/098f6bcd.unicorn.css');
+		cb();
+	});
+
+	stream.write(new gutil.File({
+		path: '~/dev/foo/unicorn.css',
+		contents: 'test'
+	}));
+});