Support several downloader configs #13131
Description
Description of the problem / feature request:
Currently --experimental_downloader_config flag only supports one value. It's not possible to provide several files. Providing several files doesn't result in any error but only one file is being used.
Feature requests: what underlying problem are you trying to solve with this feature?
We use Bazel in several projects and we would like to be able to provide one downloader_config centrally and then for each project to be able to provide their own additional downloader_config file when needed.
What operating system are you running Bazel on?
RHEL7
What's the output of bazel info release?
release 4.0.0
What's the output of git remote get-url origin ; git rev-parse master ; git rev-parse HEAD ?
https://github.com/bazelbuild/bazel.git
a3c52a7
6b33bdb
Have you found anything relevant by searching the web?
No. Current possible solution is having some kind of script to combine downloader config files prior bazel build which is not optimal.
Any other information, logs, or outputs that you want to share?
We can try to make an implementation and submit it as pull request if idea of having several downloader configs is OK with you.