Copy specified files with condition using gulp - node.js

Question

I am trying copy my vendor files to my dev folder using gulp. When I was in development mode, I want copy only the unminified files, if unminified is not present copy minified files. And in production mode I want copy minifed files if files are not present minify the normal files.
my folder structure
js
app.js
jquery
jquery.min.js
jquery.js
fontawesome
fontawesome.min.js
fontawesome.min.css
fonts.ttf...
Here my basic I had written.
var scriptsPath = '../vendor/';
function getFolders(dir) {
return fs.readdirSync(dir)
.filter(function(file) {
return fs.statSync(path.join(dir, file)).isDirectory();
});
}
gulp.task('vendor', function() {
var folders = getFolders(scriptsPath);
var cssFilter = $.filter('**/*.css')
var tasks = folders.map(function(folder) {
var jsFilter;
if (isProduction) {
jsFilter = $.filter('**/*.min.js');
} else {
jsFilter = $.filter(['**/*.js', '!**/*.min.js']);
}
return gulp.src(path.join(scriptsPath, '**/'))
.pipe(jsFilter)
.pipe($.if(useSourceMaps, $.sourcemaps.init()))
.pipe($.if(isProduction, $.uglify({preserveComments: 'some'})))
.on('error', handleError)
.pipe(jsFilter.restore())
.pipe(cssFilter)
.pipe($.if( isProduction, $.minifyCss() ))
.on('error', handleError)
.pipe(cssFilter.restore())
.on('error', handleError)
.pipe(gulp.dest(build.vendor.js));
});
return es.concat.apply(null, tasks);
});
I am trying the last two days using gulp-if& some methods. But not yet get the solution.Thanks in advance.

Answer 1

You are trying to cram way to much into your vendor task. The stuff you do with your JS files is completely unrelated to the stuff you do with your CSS files. That's hard to read.
Instead of using gulp-filter try splitting vendor up into smaller tasks like vendor-js, vendor-css, etc... and then declare them as dependencies for your vendor task:
gulp.task('vendor', ['vendor-js', 'vendor-css' /* etc ... */]);
Your vendor-js task could then look like this:
var glob = require('glob');
gulp.task('vendor-js', function () {
var js = glob.sync('../vendor/**/*.js');
if (isProduction) {
// use <file>.min.js, unless there is only <file>.js
js = js.filter(function(file) {
return file.match(/\.min\.js$/) ||
js.indexOf(file.replace(/\.js$/, '.min.js')) < 0;
});
} else {
// use <file>.js, unless there is only <file>.min.js
js = js.filter(function(file) {
return !file.match(/\.min\.js$/) ||
js.indexOf(file.replace(/\.min\.js$/, '.js')) < 0;
});
}
gulp.src(js, { base: '../vendor' })
.pipe($.if(isProduction, // only minify for prod and when
$.if("!**/*.min.js", uglify()))) // the file isn't minified already
.pipe(gulp.dest('build'));
});
Adapting this to you specific needs should be fairly trivial from here on.