Support authentication for repository_ctx.download

[guw]

Description of the problem / feature request:

The API of repository_ctx.download doesn't allow to supply authentication information.

Feature requests: what underlying problem are you trying to solve with this feature?

I need to be able to download from an url that requires authentication. At a very minimum BASIC authentication should be supported.

Ideally, it would be nice to supply authentication information in a central file for all Bazel builds and independent/decoupled from Bazel BUILD and WORKSPACE files checked into Git.

[excitoon]

I would even ask for not only Basic but NTLM/SSPI authentication.

[dkelmer]

Related bugs
bug in starlark maven jar
http archive authentication
remove native maven jar
more http authentication
authentication in jvm_import_external rules, want m2 settings
expose sha1
repository cache for git

[jin]

Thanks to @aehlig's work, repository_ctx.download now supports authentication through netrc.

[aehlig]

This is indeed implemented as per the approved design on adding authentication to downloads in commits 24cf645, 38cfc18, e1e074c, and c26e339.

[igorgatis]

Current Bazel documentation about repository_ctx.download's authentication is rather poor. I already spent literaly a handful of hours trying to make it work.

[cristifalcas]

Current Bazel documentation about repository_ctx.download's authentication is rather poor. I already spent literaly a handful of hours trying to make it work.

Please share how to do it :)

[koenverwimp]

@igorgatis Could you please share your findings?
@cristifalcas Did you find a solution in the mean time?

[tomml]

I would like to use a Bearer token here instead of basic auth. Is this possible? I need to access a private company maven repository.
Documentation is pretty poor at this point only mentioning that there is a "type" which can be "basic".

@aehlig It seems you've proposed and implemented the auth feature. Could you give some more insights? Thanks!