How do I delete old version files?

[whdeairen]

like this ，我想要唯一的joc.js

[whdeairen]

I want delete old version files

[shonny-ua]

see https://github.com/shonny-ua/gulp-rev-outdated

var gulp            = require('gulp');
var PluginError  = require('plugin-error');
var rimraf          = require('rimraf');
var revOutdated     = require('gulp-rev-outdated');
var path            = require('path');
var through         = require('through2');
function cleaner() {
    return through.obj(function(file, enc, cb){
        rimraf( path.resolve( (file.cwd || process.cwd()), file.path), function (err) {
            if (err) {
                this.emit('error', new PluginError('Cleanup old files', err));
            }
            this.push(file);
            cb();
        }.bind(this));
    });
}

gulp.src( [settings.dest + '/joc*.js'], {read: false})
        .pipe( revOutdated() )
        .pipe( cleaner() );