'ng build' provide flag to build just changed files

[shral]

Bug Report or Feature Request (mark with an x)

• feature request

Versions.

Output from: ng --version:
angular-cli: 1.0.0-beta.19-3
node: 6.2.2
os: linux x64

Repro steps.

I'm using angular 2 in an maven java project and every time that I'm building my java project the maven calls 'ng build' the problem with that is that every time ng build builds the angular 2 project even if nothing was changed, is there any flag that ng build builds just if something was changed (like the watch flag after the first call, but without watching)?

[filipesilva]

We only have the watch flag. You can maybe have a solution outside of the CLI (or by using ng eject) by using https://github.com/mzgoddard/hard-source-webpack-plugin.

[soumyakantiroychowdhury]

I am facing the same issue and would really like to have a --incremental option.

[playground]

Me 2, I have a project with multiple apps, would be great to have --incremental option to only build apps with modified files.

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