Create nested streams, similar to lazypipe but cleaner syntax and one-use only.
var fastpipe = require('fastpipe');
// ...
// Put pipes inside of a function if they need to be used more than once
function cssTasks() {
return gulpif('*.css',
// Cleaner syntax than lazypipe: no gulp-if quirks, just pretend it is a
// normal stream coming straight from gulp.src
fastpipe()
.pipe(less())
.pipe(autoprefixer())
);
}
// Enables easy customization by passing in config information, unlike lazypipe
function jsTasks(scriptInHead) {
return fastpipe()
.pipe(gulpif('*.html', crisper({ scriptInHead: scriptInHead })));
.pipe(gulpif('*.js',
// Easily nest multiple transforms inside of gulp-if
fastpipe()
.pipe(babel({ presets: ['es2015'] }))
.pipe(uglify())
));
}
gulp.task('styles', function () {
return gulp.src('app/styles/**/*')
.pipe(cssTasks())
.pipe(gulp.dest('dist/styles'));
});
gulp.task('elements', function () {
return gulp.src('app/elements/**/*')
.pipe(cssTasks())
.pipe(jsTasks())
.pipe(gulp.dest('dist/elements'));
});
// Do NOT do this, fastpipe instances are one-use only. They must be defined
// in a function for multiple uses.
var bigNoNo = fastpipe()
.pipe(less())
.pipe(autoprefixer())
gulp.task('broken-css-task', function () {
return gulp.src('app/**/*.css')
.pipe(bigNoNo)
.pipe(gulp.dest('dist'));
});
// This, however, would be okay. It's just weird because in this case, there is
// no reason to nest the stream.
gulp.task('weird-css-task', function () {
var okButWeird = fastpipe()
.pipe(less())
.pipe(autoprefixer())
return gulp.src('app/**/*.css')
.pipe(okButWeird)
.pipe(gulp.dest('dist'));
});Pull requests welcome. If you find any bugs, please submit an issue on GitHub.