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| 'use strict';
var Duplex = require('stream').Duplex,
batch = require('gulp-batch'),
Gaze = require('gaze'),
gulp = require('gulp'),
path = require('path'),
gutil = require('gulp-util');
function getWatchedFiles(gaze) {
var files = [];
var watched = gaze.watched();
Object.keys(watched).forEach(function (dir) {
files = files.concat(watched[dir]);
});
return files;
}
module.exports = function (opts, cb) {
if (typeof opts !== 'object') {
cb = opts;
opts = { };
}
opts.emit = opts.emit || 'one';
if (cb && typeof cb !== 'function') {
throw new Error('Provided callback is not a function: ' + cb);
}
var pathMap = {};
var duplex = new Duplex({ objectMode: true, allowHalfOpen: true });
duplex.gaze = new Gaze(opts.glob);
duplex._write = function _write(file, encoding, done) {
pathMap[file.path] = { cwd: file.cwd, base: file.base };
duplex.gaze.add(file.path, done.bind(null, null));
if (opts.passThrough !== false) { duplex.push(file); }
};
duplex._read = function _read() { };
duplex.close = function () {
duplex.gaze.on('end', duplex.emit.bind(duplex, 'end'));
duplex.gaze.close();
};
duplex.gaze.on('error', duplex.emit.bind(duplex, 'error'));
duplex.on('finish', function () {
var count = getWatchedFiles(duplex.gaze).length;
gutil.log(
(opts.name ? gutil.colors.cyan(opts.name) + ' is watching': 'Watching'),
gutil.colors.cyan(count),
(count === 1 ? 'file...' : 'files...'));
process.nextTick(duplex.emit.bind(duplex, 'ready'));
});
if (opts.glob) {
process.nextTick(duplex.end.bind(duplex));
}
function createFile(done, event, filepath) {
var msg = [gutil.colors.magenta(path.basename(filepath)), 'was', event];
Iif (opts.name) { msg.unshift(gutil.colors.cyan(opts.name) + ' saw'); }
gutil.log.apply(gutil, msg);
var options = {
buffer: opts.buffer,
read: opts.read,
cwd: pathMap[filepath] ? pathMap[filepath].cwd : undefined,
base: pathMap[filepath] ? pathMap[filepath].base : undefined
};
var glob = [filepath];
Iif (opts.emit === 'all') { glob = getWatchedFiles(duplex.gaze); }
gulp.src(glob, options)
.on('data', done)
.on('error', duplex.emit.bind(duplex, 'error'));
}
if (cb) {
cb = batch(opts, cb.bind(duplex));
cb.domain.on('error', duplex.emit.bind(duplex, 'error'));
}
duplex.gaze.on('all', createFile.bind(null, cb || duplex.push.bind(duplex)));
return duplex;
};
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