How to prevent Bazel from scanning certain directories?

[Alpha Lam]

Hi,

I have a workspace that has a few directories that I would like to hide from Bazel.

For example I have a .universe symlink in the workspace that is pointing to a FUSE mount to a large amount of files. I don't want Bazel to scan through it. Is there an option I can do this?

I tried:

bazel query //... -.universe

and 

bazel query --deleted_packages .universe //...

but none of these works. Any ideas how I can do this? Thanks.

Alpha

[Austin Schuh]

Try

bazel query //... -- -.universe

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[Alpha Lam]

It gives something like this:

/bazel query //... -- -.universe -ext -fout

ERROR: Bad target pattern '.universe': package names may contain only A-Z, a-z, 0-9, '/', '-' and '_'.

[Kristina Chodorow]

Dots were actually added to the allowed set a couple of days ago: https://github.com/bazelbuild/bazel/commit/c1caffaabd028493188b7e3419bedf3a9506dfee

They aren't in a release yet, but you could build bazel from source to get the change (bazel build //src:bazel).

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[alpha....@gmail.com]

Thanks Kristina,

I have synced and rebuilt Bazel but it still tries to peek into the directories I told it not to:

$ time bazel query //... -- -.universe -.base_universe -fout

INFO: Waiting for response from Bazel server (pid 7831)...

INFO: Loading package: .universe/x86-64/ext/public/google/bazel/dist/base_workspace/tools

Is there something wrong I'm doing? Thanks.

Alpha

[Alpha Lam]

After some testing it seems like whenever //... is used Bazel always scan all the directories under the target. Exclusion is done after the scan.

For example:

bazel build --deleted_packages=ext //...

or bazel build //... -- -ext

will always scan into ext. And exclude the targets after scanning.

Is there an option to avoid scanning a directory at all? Thanks.

Alpha

[Tom Ball]

One way is to put a BUILD file in that sub-directory. If nothing else, it's a good place to put a comment explaining why its files aren't part of the overall build.

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