Support loading http credentials from netrc

[golovasteek]

Bazel's http_archive and http_file use ~/.netrc file to load HTTP credentials.

Now rules_rust use the same approach if no other authorization parameters are provided.

NOTE: http_archive supports passing a custom netrc and auth_patterns. But this parameters are not added to the rust rules at the moment.

[krasimirgg]

Thank you!

NOTE: http_archive supports passing a custom netrc and auth_patterns. But this parameters are not added to the rust rules at the moment.

Any reason why not? Naively, a big chunk of that new get_auth function is to handle those and we'll need to add them at some point anyways, so let's just add them now (like they did in Python, bazel-contrib/rules_python#1417).

[illicitonion]

Works for me! Will leave @krasimirgg to discuss extending support :)

[golovasteek]

Thank you!

NOTE: http_archive supports passing a custom netrc and auth_patterns. But this parameters are not added to the rust rules at the moment.

Any reason why not? Naively, a big chunk of that new get_auth function is to handle those and we'll need to add them at some point anyways, so let's just add them now (like they did in Python, bazelbuild/rules_python#1417).

I've basically followed the YAGNI rule. I though it would be straight forward to add and test these parameters, once they are need.

If you say it is valuable to add it, I'm happy to do so.