How to Ensure Sequential Task Execution in Gulp?

Overcoming Sequential Execution Challenges in Gulp

In Gulp, tasks often execute concurrently, hindering sequential execution. This can pose challenges when tasks rely on the completion of preceding ones.

For instance, consider the following task configuration:

gulp.task "coffee", ->
    gulp.src("src/server/**/*.coffee")
        .pipe(coffee {bare: true}).on("error",gutil.log)
        .pipe(gulp.dest "bin")

gulp.task "clean",->
    gulp.src("bin", {read:false})
        .pipe clean
            force:true

gulp.task 'develop',['clean','coffee'], ->
    console.log "run something else"

In this scenario, you expect develop to execute clean first, followed by coffee, and then perform additional operations. However, Gulp's default behavior results in clean and coffee starting simultaneously.

Solution: Harnessing the Power of run-sequence

To achieve sequential execution, leverage the run-sequence plugin. After installing it, modify your code as follows:

var runSequence = require('run-sequence');

gulp.task('develop', function(done) {
    runSequence('clean', 'coffee', function() {
        console.log('Run something else');
        done();
    });
});

Explanation

run-sequence allows you to specify the execution order of tasks explicitly. Here, develop is defined as a function that accepts a done callback. Within this function, runSequence is invoked with an array of tasks you wish to run sequentially. Once all specified tasks are completed, the done callback is triggered, executing subsequent operations.

The above is the detailed content of How to Ensure Sequential Task Execution in Gulp?. For more information, please follow other related articles on the PHP Chinese website!