Add support for source maps with UglifyJS 2 optimizer

[Thomas Bachem]

UglifyJS has been added as a build optimizer thru #14684, but source maps are not yet supported. ​UglifyJS 2 is stable and supports source maps, so it would be nice if the Dojo build scripts would make use of them.

[ben hockey]

this is already supported. add something like the following to your build profile.

        // find the options at https://github.com/mishoo/UglifyJS2#the-hard-way
        optimizeOptions: {
                compress_options: {},
                gen_options: {}
        },

is there something more than this which you need?

[Thomas Bachem]

Great, thanks for the info! I don't get how to implement it though.

I'm currently calling

node build.js --profile build.profile.js --releaseDir ... --optimize uglify --layerOptimize uglify --stripConsole all --cssOptimize comments

Now I want a ".js.map" file for every built Javascript file, so I thought of putting this in my build.profile.js:

optimizeOptions: {
	compress_options: {},
	gen_options: {
		source_map: UglifyJS.SourceMap()
	}
}

But this feels strange and leads to "error(347) Failed to evaluate profile file. profile: build.profile.js; error: ReferenceError?: UglifyJS is not defined".

I guess I'm probably doing it totally wrong.

[ben hockey]

ok, i may have spoke too soon. let me work on something and see if i can get a pull request - i think there may need to be some extra support added.

[Thomas Bachem]

Thanks a lot!

[ben hockey]

i've opened ​https://github.com/dojo/util/pull/24

if you have time to try it out, i'd like to get feedback.

[Thomas Bachem]

That's fantastic! Works well, thank you so much for this quick resolution!

[Colin Snover <github.com@…>]

In 920a75b5277b4f2a05f636d99bb5acbf52bb8229/util:

Error: Processor CommitTicketReference failed

Unsupported version control system "git": Can't find an appropriate component, maybe the corresponding plugin was not enabled? 

[Colin Snover <github.com@…>]

In 51a1844ee3cedfc669a3ad70e1894e2e5e3e781d/util:

Error: Processor CommitTicketReference failed

Unsupported version control system "git": Can't find an appropriate component, maybe the corresponding plugin was not enabled?