我有一个gulpfile,应该在缩小代码之前清理我的dist目录.有时,干净的任务仍在运行,同时代码被缩小,导致一些丢失的文件.
是什么导致它这样做？我的理解是,任务的依赖关系将在任务运行之前完成,并且依赖关系只会运行一次,即使它是多个任务的依赖关系.
var gulp = require('gulp');
var gulpLoadPlugins = require('gulp-load-plugins');
var plugins = gulpLoadPlugins();
var del = require('del');
gulp.task('default',['css','js','fonts']);
gulp.task('clean',function(cb) {
del(['dist/**'],cb);
});
gulp.task('css',['clean'],function() {
return gulp.src('style.css')
.pipe(plugins.autoprefixer({
browsers: ['last 2 versions']
}))
.pipe(gulp.dest('dist'))
.pipe(plugins.minifyCss({
noRebase: true,keepSpecialComments: 0
}))
.pipe(plugins.rename({extname: '.min.css'}))
.pipe(gulp.dest('dist'));
});
gulp.task('js',function() {
return gulp.src('scripts.js')
.pipe(gulp.dest('dist'))
.pipe(plugins.uglify({preserveComments: 'some'}))
.pipe(plugins.rename({extname: '.min.js'}))
.pipe(gulp.dest('dist'));
});
gulp.task('fonts',function() {
return gulp.src('fonts/*')
.pipe(gulp.dest('dist/fonts'));
});
更新：Gulp输出表明clean任务在其他任务启动之前完成,但有时并非所有输出文件都在dist目录中.有时他们是.
[09:47:15] Using gulpfile /Users/raddevon/Documents/projects/AlphaBlog/theme/gulpfile.js [09:47:15] Starting 'clean'... [09:47:15] Finished 'clean' after 8.06 ms [09:47:15] Starting 'css'... [09:47:15] Starting 'js'... [09:47:16] Starting 'fonts'... [09:47:16] Finished 'js' after 399 ms [09:47:16] Finished 'css' after 899 ms [09:47:16] Finished 'fonts' after 267 ms [09:47:16] Starting 'default'... [09:47:16] Finished 'default' after 7.78 μs
解决方法
使用del.sync(),其他任务将仅在清理任务完成后启动.
gulp.task('clean',function () {
del.sync(['./build/**']);
});
