ng build --watch: Do not fail when output directory cannot be removed

[robelcik]

Bug Report or Feature Request (mark with an x)

- [ ] bug report -> please search issues before submitting
- [x ] feature request

Versions.

@angular/cli: 1.0.4
node: 6.10.0
os: win32 x64
@angular/common: 4.0.3
@angular/compiler: 4.0.3
@angular/core: 4.0.3
@angular/forms: 4.0.3
@angular/http: 4.0.3
@angular/platform-browser: 4.0.3
@angular/platform-browser-dynamic: 4.0.3
@angular/router: 4.0.3
@angular/cli: 1.0.4
@angular/compiler-cli: 4.0.3

Repro steps.

The log given by the failure.

Desired functionality.

I would like build --watch to write directly to my JEE application server so I don't need to redeploy the whole application after small changes in its Angular part.

Currently, build --watch tries to remove the output directory before compilation starts. The removal fails because output directory contains non-Angular files which are opened by application server. Responsible code is in tasks/build.js, a line like rimraf.sync(path.resolve(project.root, outputPath));

A workaround I use now is to have output directory within my project and use other tool to synchronize it with application server. But of course, it would be nice to have this issue handled in angular/cli.

An example solution could be to add an option for not removing/cleaning the output directory.

Mention any other details that might be useful.

[filipesilva]

#6186 added a flag to not delete the output directory, you can use this functionality by installing @angular/cli@minor.

[robelcik]

Thanks a lot guys! It works fine for me!

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