Admin
1
If I have a watcher like this:
gulp.watch('js/**/*.js').on('change', path => {
gulp.series(build, reload)();
});
...and task build would look like this:
const build = done => {
return gulp
.src(path) // Use "path" here
.pipe(
rename({
dirname: ''
})
)
.pipe(uglify())
.pipe(gulp.dest('build'));
};
How can I pass path argument to the build task?
As an exercise I believe I got this working as you wanted. But first let me say that the traditional way of limiting the source pipeline would be with something like gulp-newer. You should see if that accomplishes what you want.
But here is something that may work for you [not well tested!]:
function build (path) {
return new Promise(resolve => {
// using setTimeout() to prove async/await is working as expected
setTimeout(() => {
resolve('resolved');
}, 2000);
// put your gulp.src pipeline here using 'path'
console.log("2 path = " + path);
});
};
function anotherTask (path) {
return new Promise(resolve => {
// put your gulp.src pipeline here
console.log("4 path = " + path); });
};
function testWatch () {
console.log("in testWatch");
// debounceDelay because gulp likes to call the watcher 2 or 3times otherwise
// see [gulp watch task running multiple times when a file is saved][2]
var watcher = gulp.watch('js/**/*.js', { debounceDelay: 2000 });
// I added the async/await because I wasn't sure those functions would be run in series
// as you wanted.
// With the event listener route I couldn't get gulp.series to work,
// so went with async/await.
watcher.on('change', async function(path, stats) {
console.log('1 File ' + path + ' was changed');
await build(path);
console.log("3 after build");
// I would assume that the **last** task in the chain doesn't need 'await'
// or to return a promise as in anotherTask
await anotherTask(path);
console.log("5 after anotherTask");
});
};
gulp.task('default', gulp.series(testWatch));
gulp watch running multiple times mentioned above in code.
Output (my js watch src is different than yours) :
in testWatch
1 File src\js\main.js was changed
2 path = src\js\main.js
3 after build
4 path = src\js\main.js
5 after anotherTask
1 File src\js\taxonomy.js was changed
2 path = src\js\taxonomy.js
3 after build
4 path = src\js\taxonomy.js
5 after anotherTask
