It seems that collector doesn't work

[YDSS]

HI, I'm using gulp-rev-collector and found it not working. I write a demo to reappear what I meat. Here is my gulpfile.js:

'use strict'

let gulp = require('gulp');
let rev = require('gulp-rev');
let revController = require('gulp-rev-collector');
let minifyHTML = require('gulp-minify-html');
let DIST = './dist';

gulp.task('default', ['css', 'js', 'index']);

gulp.task('css', () => {
    gulp.src('./src/**.css')
        .pipe(rev())
        .pipe(gulp.dest(DIST))
        .pipe(rev.manifest('css-map.json', {
            merge: true
        }))
        .pipe(gulp.dest(DIST));
});

gulp.task('js', () => {
    gulp.src('./src/**.js')
        .pipe(rev())
        .pipe(gulp.dest(DIST))
        .pipe(rev.manifest('js-map.json', {
            merge: true
        }))
        .pipe(gulp.dest(DIST));
});

gulp.task('index', () => {
    gulp.src([DIST + '/**.json', './src/index.html'])
        .pipe(revController())
        .pipe(minifyHTML({
            empty: true,
            spare: true
        }))
        .pipe(gulp.dest(DIST));
});

I found if I directly run gulp, link and script tag in index.html did not be replaced by url with md5, but if I run gulp index, it works. So I guess, maybe when collector runs the manifest file generate by gulp-rev has not created.

[YDSS]

I found where I am wrong: I didn't return in every task which task index depends, I'm sorry~~