104 lines
2.6 KiB
JavaScript
104 lines
2.6 KiB
JavaScript
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'use strict';
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var through = require('through2');
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var path = require('path');
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var gutil = require('gulp-util');
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var PluginError = gutil.PluginError;
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var File = gutil.File;
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var Concat = require('concat-with-sourcemaps');
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// file can be a vinyl file object or a string
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// when a string it will construct a new one
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module.exports = function(file, opt) {
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if (!file) {
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throw new PluginError('gulp-concat', 'Missing file option for gulp-concat');
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}
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opt = opt || {};
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// to preserve existing |undefined| behaviour and to introduce |newLine: ""| for binaries
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if (typeof opt.newLine !== 'string') {
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opt.newLine = gutil.linefeed;
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}
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var isUsingSourceMaps = false;
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var latestFile;
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var latestMod;
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var fileName;
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var concat;
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if (typeof file === 'string') {
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fileName = file;
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} else if (typeof file.path === 'string') {
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fileName = path.basename(file.path);
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} else {
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throw new PluginError('gulp-concat', 'Missing path in file options for gulp-concat');
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}
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function bufferContents(file, enc, cb) {
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// ignore empty files
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if (file.isNull()) {
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cb();
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return;
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}
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// we don't do streams (yet)
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if (file.isStream()) {
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this.emit('error', new PluginError('gulp-concat', 'Streaming not supported'));
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cb();
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return;
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}
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// enable sourcemap support for concat
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// if a sourcemap initialized file comes in
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if (file.sourceMap && isUsingSourceMaps === false) {
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isUsingSourceMaps = true;
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}
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// set latest file if not already set,
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// or if the current file was modified more recently.
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if (!latestMod || file.stat && file.stat.mtime > latestMod) {
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latestFile = file;
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latestMod = file.stat && file.stat.mtime;
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}
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// construct concat instance
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if (!concat) {
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concat = new Concat(isUsingSourceMaps, fileName, opt.newLine);
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}
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// add file to concat instance
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concat.add(file.relative, file.contents, file.sourceMap);
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cb();
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}
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function endStream(cb) {
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// no files passed in, no file goes out
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if (!latestFile || !concat) {
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cb();
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return;
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}
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var joinedFile;
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// if file opt was a file path
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// clone everything from the latest file
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if (typeof file === 'string') {
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joinedFile = latestFile.clone({contents: false});
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joinedFile.path = path.join(latestFile.base, file);
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} else {
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joinedFile = new File(file);
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}
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joinedFile.contents = concat.content;
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if (concat.sourceMapping) {
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joinedFile.sourceMap = JSON.parse(concat.sourceMap);
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}
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this.push(joinedFile);
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cb();
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}
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return through.obj(bufferContents, endStream);
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};
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