69 lines
2.2 KiB
JavaScript
69 lines
2.2 KiB
JavaScript
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/*!
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* gulp-dedupe, https://github.com/hoho/gulp-dedupe
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* (c) 2014 Marat Abdullin, MIT license
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*/
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'use strict';
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var through = require('through');
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var gutil = require('gulp-util');
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var PluginError = gutil.PluginError;
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var path = require('path');
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var defaults = require('lodash.defaults');
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module.exports = function(options) {
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var filesMap = {};
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options = defaults(options || {}, {
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error: false, // Throw an error in case of duplicate.
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same: true, // Throw an error in case duplicates have different contents.
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diff: false // Supply duplicates with different content error with actual diff.
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});
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function bufferContents(file) {
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if (file.isNull()) { return; }
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if (file.isStream()) { return this.emit('error', new PluginError('gulp-dedupe', 'Streaming not supported')); }
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var fullpath = path.resolve(file.path),
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f;
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if ((f = filesMap[fullpath])) {
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if (options.error) {
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this.emit('error', new PluginError('gulp-dedupe', 'Duplicate `' + file.path + '`'));
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} else if (options.same && file.contents.toString() !== f.contents.toString()) {
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var errorDiff = [];
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if (options.diff) {
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require('colors');
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var diff = require('diff').diffChars(file.contents.toString(), f.contents.toString());
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errorDiff.push(':\n');
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diff.forEach(function(part){
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// green for additions, red for deletions
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// grey for common parts
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var color = part.added ? 'green' :
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part.removed ? 'red' : 'grey';
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errorDiff.push(part.value[color]);
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});
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}
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errorDiff = errorDiff.join('');
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this.emit('error', new PluginError('gulp-dedupe', 'Duplicate file `' + file.path + '` with different contents' + errorDiff));
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}
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return;
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} else {
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filesMap[fullpath] = file;
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}
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this.emit('data', file);
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}
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function endStream() {
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this.emit('end');
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}
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return through(bufferContents, endStream);
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};
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