How to do multi dynamic stream in one gulp task from object - stream

Question

I´m trying to copy files in gulp file dynamically based on json object.
I tried to use merge-stream package withou success.
const DEV_PATH = "./dev/";
const DIST_PATH = "./dist/";
const DEV_PATH_TOOLS = DEV_PATH + "tools/";
const DEV_PATH_COMMON = DEV_PATH + "common/";
const DIST_PATH_TOOLS = DIST_PATH + "tools/";
const TOOLS_DIST_PATH = [
{
"dir" : 'dir1',
"options" : {
"class" : [ "modules/csv/**/*" ]
}
},
{
"dir" : 'dir2',
"options" : {
"class" : [ "modules/csv/CsvImporter.php" ]
}
}
];
const gulp = require('gulp');
const plumber = require('gulp-plumber');
const merged = require('merge-stream')();
gulp.task( 'copy-class', function(){
TOOLS_DIST_PATH.map( t => function () {
var stream = new stream(
gulp.src( t.options.class.map( c => DEV_PATH_COMMON + c ))
.pipe(plumber({
handleError: function (err) {
console.log(err);
this.emit('end');
}
}))
.pipe( gulp.dest( DIST_PATH_TOOLS + t.dir + '/class' ) )
.pipe(plumber({
handleError: function (err) {
console.log(err);
this.emit('end');
}
}))
);
merged.add(stream);
});
return merged.isEmpty() ? null : merged;
});
gulp.task( 'default', gulp.series( 'copy-class' ) );
I got this error :
The following tasks did not complete: default, copy-class
Did you forget to signal async completion ?
It´s confused for me, someone can helps me ?

Answer 1

I found an answer
Const DEV_PATH = "./dev/";
const DIST_PATH = "./dist/";
const DEV_PATH_TOOLS = DEV_PATH + "tools/";
const DEV_PATH_COMMON = DEV_PATH + "common/";
const DIST_PATH_TOOLS = DIST_PATH + "tools/";
const TOOLS_DIST_PATH = [
{
"dir" : 'dir1',
"options" : {
"class" : [ "modules/csv/**/*" ]
}
},
{
"dir" : 'dir2',
"options" : {
"class" : [ "modules/csv/CsvImporter.php" ]
}
}
];
const gulp = require('gulp');
const plumber = require('gulp-plumber');
const merge= require('merge-stream');
function compileScripts(t) {
const classStream = gulp.src( t.options.class.map( c => DEV_PATH_COMMON + c ))
.pipe(plumber({
handleError: function (err) {
console.log(err);
this.emit('end');
}
}))
.pipe( gulp.dest( DIST_PATH_TOOLS + t.dir + '/class' ) )
.pipe(plumber({
handleError: function (err) {
console.log(err);
this.emit('end');
}
}))
/* TODO : when there wil be several options
return merge(classStream , otherStream );*/
return classStream;
}
gulp.task( 'copy-options', function(){
var streams = TOOLS_DIST_PATH.map( t => {
return compileScripts(t);
});
return merge(streams);
});
gulp.task( 'default', gulp.series( 'copy-options' ) );