forked from zhurui/management
118 lines
3.3 KiB
JavaScript
118 lines
3.3 KiB
JavaScript
/*jslint node: true */
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'use strict';
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var through2 = require('through2');
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var Combine = require('ordered-read-streams');
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var unique = require('unique-stream');
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var glob = require('glob');
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var minimatch = require('minimatch');
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var glob2base = require('glob2base');
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var path = require('path');
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var gs = {
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// creates a stream for a single glob or filter
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createStream: function(ourGlob, negatives, opt) {
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if (!negatives) negatives = [];
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if (!opt) opt = {};
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if (typeof opt.cwd !== 'string') opt.cwd = process.cwd();
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if (typeof opt.dot !== 'boolean') opt.dot = false;
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if (typeof opt.silent !== 'boolean') opt.silent = true;
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if (typeof opt.nonull !== 'boolean') opt.nonull = false;
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if (typeof opt.cwdbase !== 'boolean') opt.cwdbase = false;
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if (opt.cwdbase) opt.base = opt.cwd;
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// remove path relativity to make globs make sense
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ourGlob = unrelative(opt.cwd, ourGlob);
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negatives = negatives.map(unrelative.bind(null, opt.cwd));
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// create globbing stuff
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var globber = new glob.Glob(ourGlob, opt);
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// extract base path from glob
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var basePath = opt.base ? opt.base : glob2base(globber);
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// create stream and map events from globber to it
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var stream = through2.obj(negatives.length ? filterNegatives : undefined);
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globber.on('error', stream.emit.bind(stream, 'error'));
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globber.on('end', function(/* some args here so can't use bind directly */){
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stream.end();
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});
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globber.on('match', function(filename) {
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stream.write({
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cwd: opt.cwd,
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base: basePath,
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path: path.resolve(opt.cwd, filename)
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});
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});
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return stream;
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function filterNegatives(filename, enc, cb) {
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var matcha = isMatch.bind(null, filename, opt);
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if (negatives.every(matcha)) {
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cb(null, filename); // pass
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} else {
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cb(); // ignore
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}
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}
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},
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// creates a stream for multiple globs or filters
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create: function(globs, opt) {
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if (!opt) opt = {};
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// only one glob no need to aggregate
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if (!Array.isArray(globs)) return gs.createStream(globs, null, opt);
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var positives = globs.filter(isPositive);
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var negatives = globs.filter(isNegative);
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if (positives.length === 0) throw new Error("Missing positive glob");
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// only one positive glob no need to aggregate
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if (positives.length === 1) return gs.createStream(positives[0], negatives, opt);
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// create all individual streams
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var streams = positives.map(function(glob){
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return gs.createStream(glob, negatives, opt);
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});
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// then just pipe them to a single unique stream and return it
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var aggregate = new Combine(streams);
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var uniqueStream = unique('path');
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return aggregate.pipe(uniqueStream);
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}
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};
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function isMatch(file, opt, pattern) {
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if (typeof pattern === 'string') return minimatch(file.path, pattern, opt);
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if (pattern instanceof RegExp) return pattern.test(file.path);
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return true; // unknown glob type?
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}
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function isNegative(pattern) {
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if (typeof pattern !== 'string') return true;
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if (pattern[0] === '!') return true;
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return false;
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}
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function isPositive(pattern) {
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return !isNegative(pattern);
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}
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function unrelative(cwd, glob) {
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var mod = '';
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if (glob[0] === '!') {
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mod = glob[0];
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glob = glob.slice(1);
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}
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return mod+path.resolve(cwd, glob);
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}
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module.exports = gs;
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