gulp任务失败，出现EEXIST错误

Question

今天早上，我的gulp构建脚本开始失败;除了在项目目录中完成我的正常工作之外，我没有对我的系统进行其他更改。

我有一个带有各种HTML片段，图像，javascript，LESS的/ src目录，我正在使用gulp编译/连接/复制它们并将它们放在/ web目录中。 “默认”任务运行一个“构建”任务，该任务调用所有其他任务，然后设置gulp.watch以查看目录中的更改，并运行相应的任务即可找到更改。

在每个任务开始时，我使用del（）来清理目标文件夹。但是，当需要将内容放入目标文件夹时，任务将失败，并显示'EEXIST'错误，或者任务完成正常，并且某些文件在输出目录中随机丢失。

这里是我的命令提示符下，显示任务失败随机：

> user$ gulp 
[11:58:02] Using gulpfile PROJECTPATH/gulpfile.js 
[11:58:02] Starting 'styles'... 
[11:58:02] Starting 'scripts'... 
[11:58:02] Starting 'images'... 
[11:58:02] Starting 'fonts'... 
[11:58:02] Starting 'html'... 
[11:58:03] Finished 'styles' after 726 ms 
[11:58:03] gulp-imagemin: Minified 1 image (saved 7.38 kB - 10.4%) 
[11:58:03] Finished 'fonts' after 714 ms 
[11:58:03] Finished 'images' after 722 ms 
[11:58:03] Finished 'scripts' after 741 ms 
[11:58:03] Finished 'html' after 737 ms 
[11:58:03] Starting 'build'... 
[11:58:03] Finished 'build' after 9.61 μs 
[11:58:03] Starting 'default'... 
[11:58:03] Finished 'default' after 125 ms 
> user$ gulp 
[11:58:22] Using gulpfile PROJECTPATH/gulpfile.js 
[11:58:22] Starting 'styles'... 
[11:58:22] Starting 'scripts'... 
[11:58:22] Starting 'images'... 
[11:58:22] Starting 'fonts'... 
[11:58:22] Starting 'html'... 
[11:58:22] 'scripts' errored after 86 ms 
[11:58:22] Error: EEXIST, mkdir 'PROJECTPATH/web/project_files/js' 
[11:58:22] 'fonts' errored after 74 ms 
[11:58:22] Error: ENOENT, open 'PROJECTPATH/web/project_files/fonts/glyphicons-halflings-regular.eot' 
[11:58:23] 'html' errored after 144 ms 
[11:58:23] Error: EEXIST, mkdir 'PROJECTPATH/web/project_files/templates/instruction' 
[11:58:23] Finished 'styles' after 728 ms 
[11:58:23] gulp-imagemin: Minified 1 image (saved 7.38 kB - 10.4%) 
[11:58:23] Finished 'images' after 736 ms 
> user$ gulp 
[11:58:28] Using gulpfile PROJECTPATH/gulpfile.js 
[11:58:28] Starting 'styles'... 
[11:58:28] Starting 'scripts'... 
[11:58:28] Starting 'images'... 
[11:58:28] Starting 'fonts'... 
[11:58:28] Starting 'html'... 
[11:58:28] Finished 'styles' after 729 ms 
[11:58:28] Finished 'fonts' after 707 ms 
[11:58:28] Finished 'scripts' after 737 ms 
[11:58:28] gulp-imagemin: Minified 1 image (saved 7.38 kB - 10.4%) 
[11:58:28] Finished 'images' after 733 ms 
[11:58:28] Finished 'html' after 740 ms 
[11:58:28] Starting 'build'... 
[11:58:28] Finished 'build' after 9.73 μs 
[11:58:28] Starting 'default'... 
[11:58:28] Finished 'default' after 120 ms 
> user$ gulp 
[11:58:34] Using gulpfile PROJECTPATH/gulpfile.js 
[11:58:34] Starting 'styles'... 
[11:58:34] Starting 'scripts'... 
[11:58:34] Starting 'images'... 
[11:58:34] Starting 'fonts'... 
[11:58:34] Starting 'html'... 
[11:58:34] 'scripts' errored after 95 ms 
[11:58:34] Error: EEXIST, mkdir 'PROJECTPATH/web/project_files/js' 
[11:58:34] 'fonts' errored after 84 ms 
[11:58:34] Error: ENOENT, open 'PROJECTPATH/web/project_files/fonts/glyphicons-halflings-regular.eot' 
[11:58:34] 'html' errored after 143 ms 
[11:58:34] Error: EEXIST, mkdir 'PROJECTPATH/web/project_files/templates/instruction' 
[11:58:35] Finished 'styles' after 737 ms 
[11:58:35] gulp-imagemin: Minified 1 image (saved 7.38 kB - 10.4%) 
[11:58:35] Finished 'images' after 742 ms 

这里是我使用的一饮而尽文件：

var gulp = require('gulp'), 
    less = require('gulp-less'), 
    autoprefixer = require('gulp-autoprefixer'), 
    minifycss = require('gulp-minify-css'), 
    jshint = require('gulp-jshint'), 
    uglify = require('gulp-uglify'), 
    imagemin = require('gulp-imagemin'), 
    rename = require('gulp-rename'), 
    concat = require('gulp-concat'), 
    fileinclude = require('gulp-file-include'), 
    cache = require('gulp-cache'), 
    gutil = require('gulp-util'), 
    rename = require('gulp-rename'), 
    merge = require('merge-stream'), 
    del = require('del'), 
    libraries = [ 
    'src/js/jquery-*.js', 
    'src/js/bootstrap/transition.js', 
    'src/js/bootstrap/collapse.js', 
    'src/js/bootstrap/modal.js', 
    'src/js/bootstrap/affix.js', 
    'src/js/bootstrap-datepicker.js', 
    'src/js/bootbox.js', 
    'src/js/chosen.jquery.js', 
    'src/js/underscore.js', 
    'src/js/sha1.js', 
    'src/js/DeviceIdConverter.js', 
    'src/js/custom.js' 
    ], 
    ieLibraries = [ 
    'src/js/html5shiv.js', 
    'src/js/respond.js' 
    ], 
    appConfig = [ 
    'src/js/country.json', 
    'src/js/locations.json', 
    'src/js/make_model.json', 
    'src/js/project.js' 
    ]; 

gulp.task('styles', function() { 
    del(['web/project_files/css']); 
    return gulp.src('src/less/project.less') 
    .pipe(less()) 
    .pipe(gulp.dest('web/project_files/css')) 
}); 

gulp.task('scripts', function() { 
    del(['web/project_files/js']); 

    var libraryStream = gulp.src(libraries) 
    .pipe(concat('libraries.js')), 

    ieLibraryStream = gulp.src(ieLibraries) 
    .pipe(concat('ie8.js')), 

    appConfigStream = gulp.src(appConfig) 
    .pipe(rename(function(path) { 
     path.extname = '.js'; 
    })); 

    return merge(libraryStream, ieLibraryStream, appConfigStream) 
    .pipe(gulp.dest('web/project_files/js')); 
}); 

gulp.task('images', function() { 
    del(['web/project_files/img']); 
    return gulp.src('src/img/**/*.+(jpg|png)') 
    .pipe(imagemin({optimizationLevel: 3, progressive: true, interlaced: true })) 
    .pipe(gulp.dest('web/project_files/img')) 
}); 

gulp.task('fonts', function() { 
    del(['web/project_files/fonts']); 
    return gulp.src('src/fonts/**/*.+(eot|svg|ttf|woff|otf)') 
    .pipe(rename(function(path) { 
     path.dirname = ''; 
    })) 
    .pipe(gulp.dest('web/project_files/fonts')); 
}); 

gulp.task('html', function() { 
    del(['web/project.htm']); 
    del(['web/project_files/templates']); 

    var htmlStream = gulp.src('src/html/index.html') 
    .pipe(fileinclude()) 
    .pipe(rename('project.htm')); 

    var templateStream = gulp.src('src/html/templates/**/*.html') 
    .pipe(rename(function(path) { 
     path.dirname = "/project_files/templates/"+path.dirname; 
     path.extname = ".tpl"; 
    })); 

    return(merge(htmlStream, templateStream)) 
    .pipe(gulp.dest('web')); 
}); 

gulp.task('build', ['styles', 'scripts', 'images', 'fonts', 'html'], function() { 

}); 


gulp.task('default', ['build'], function() { 
    gulp.watch('src/html/**/*.html', ['html']); 
    gulp.watch('src/less/**/*.less', ['styles']); 
    gulp.watch('src/js/**/*.js', ['scripts']); 
    gulp.watch('src/img/**/*.+(jpg|png)', ['images']); 
    gulp.watch('src/fonts/**/*.+(eot|svg|ttf|woff|otf)', ['fonts']); 
}); 

错误消息说，目标位置存在，但不应该在每个子任务开始时删除目标目录？

UPDATE：

这里就是这样，我现在构建我的任务，这似乎是工作快速，正确：

gulp.task('scripts', function() { 
    del(['web/js'], function(err) { 
    if (err) return; 
    return gulp.src('src/js/**/*.js') 
     .pipe(concat('mything.js')) 
     .pipe(gulp.dest('web/js')); 
    }); 
}); 

Answer 1

不应德尔（）被移除的目标目录每个孩子任务的开始？

是的，但你最终在del完成之前创建新的东西（它是异步的）。

我会创建一个单独的任务，并仅在完成构建时将其用作依赖项。

gulp.task('clean', function(cb) { 
    del(['something/**'], cb); 
}); 

..或使用del.sync

https://github.com/sindresorhus/del#delsyncpatterns-options