Allow excluding entrypoints from the dart2js transformer

[DartBot]

<img src="https://avatars.githubusercontent.com/u/5479?v=3" align="left" width="96" height="96"hspace="10"> Issue by sethladd
Originally opened as dart-lang/sdk#14594

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Currently, pub build finds all .dart files in web/ with a main(). I want the fastest builds, so I'd like to say which files I want compiled.

I'd like a way to specify the entry points that I want pub build to process
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[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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I want the fastest builds, so I'd like to say which files I want compiled.

If you got the fastest builds some other (for purposes of discussion magical) way, would you still care to control which files are compiled? Can you frame this bug in terms of the problem you're running into?

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Added this to the Later milestone.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/5479?v=3" align="left" width="48" height="48"hspace="10"> Comment by sethladd

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Sure, performance aside. (although, that's a big part of this. compiling to JS is non trivial)

Let's say I have App A, but experiment E. E might be busted, only works in Dartium, won't be deployed, just for me. I don't want to slow down the build, introduce extraneous error messages or warnings, or break the build if all I care about is App A.

So I guess this is about cycle times mostly, and reducing warnings/output about broken builds that I know are broken.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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Issue #739 has been merged into this issue.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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Removed Priority-Unassigned label.
Added Priority-Medium label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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Removed Priority-Medium label.
Added Priority-High label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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Marked this as blocking dart-lang/sdk#15829.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/188?v=3" align="left" width="48" height="48"hspace="10"> Comment by nex3

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I believe the current plan for issue #695 will cover this use case. As such, can we close out this bug?

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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We now let you specify which directory you want to build, but not which entrypoints.

This ticket is a bit vague. If you specify some entrypoint, presumably you do also want all of the other assets needed by that entrypoint. Is it more that you want to exclude certain entrypoints from being compiled using dart2js?

[DartBot]

<img src="https://avatars.githubusercontent.com/u/5479?v=3" align="left" width="48" height="48"hspace="10"> Comment by sethladd

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Sure, excluding entry points would help. See https://code.google.com/p/dart/issues/detail?id=14594#c2 In that case, I wanted to say "don't build this thing, it's busted and I know it"

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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OK, retargeting the bug.

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Changed the title to: "Allow excluding entrypoints from the dart2js transformer".

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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I'm gonna start poking at this. My plan is to add support for $exclude and $include to transformers in general, and then we'll get dart2js for free.

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cc @nex3.
Set owner to @munificent.
Added Started label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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$include and $exclude are in.

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Added Fixed label.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/5479?v=3" align="left" width="48" height="48"hspace="10"> Comment by sethladd

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thanks!

We might want to document this. CC'ing Sharon.

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cc @Sfshaza.

[DartBot]

<img src="https://avatars.githubusercontent.com/u/46275?v=3" align="left" width="48" height="48"hspace="10"> Comment by munificent

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Yup: https://code.google.com/p/dart/issues/detail?id=17128