bazel fetch unconditionally fetching dependencies, is that correct?

[Derek Perez]

Here's what I'm doing:

cloning this repository:

https://github.com/protocolbuffers/protobuf

and running bazel fetch //... fails with the following message:

ERROR: /private/var/tmp/_bazel_pzd/c17e9dfd65f609874d4755d44ce042d8/external/com_google_googletest/BUILD.bazel:57:11: no such package '@com_google_absl//absl/types': The repository '@com_google_absl' could not be resolved and referenced by '@com_google_googletest//:gtest'
ERROR: /private/var/tmp/_bazel_pzd/c17e9dfd65f609874d4755d44ce042d8/external/com_google_googletest/BUILD.bazel:57:11: no such package '@com_google_absl//absl/debugging': The repository '@com_google_absl' could not be resolved and referenced by '@com_google_googletest//:gtest'
ERROR: /private/var/tmp/_bazel_pzd/c17e9dfd65f609874d4755d44ce042d8/external/com_google_googletest/BUILD.bazel:57:11: no such package '@com_google_absl//absl/types': The repository '@com_google_absl' could not be resolved and referenced by '@com_google_googletest//:gtest'
ERROR: /private/var/tmp/_bazel_pzd/c17e9dfd65f609874d4755d44ce042d8/external/com_google_googletest/BUILD.bazel:57:11: no such package '@com_google_absl//absl/debugging': The repository '@com_google_absl' could not be resolved and referenced by '@com_google_googletest//:gtest'
ERROR: /private/var/tmp/_bazel_pzd/c17e9dfd65f609874d4755d44ce042d8/external/com_google_googletest/BUILD.bazel:57:11: no such package '@com_google_absl//absl/debugging': The repository '@com_google_absl' could not be resolved and referenced by '@com_google_googletest//:gtest'
ERROR: /private/var/tmp/_bazel_pzd/c17e9dfd65f609874d4755d44ce042d8/external/com_google_googletest/BUILD.bazel:57:11: no such package '@com_google_absl//absl/strings': The repository '@com_google_absl' could not be resolved and referenced by '@com_google_googletest//:gtest'

Our project does not depend on absl, but googletest does:

https://github.com/google/googletest/blob/master/BUILD.bazel#L110

However, that appears to be select conditioned, and nothing I can tell should be setting absl=1 as a --define. So, this kinda makes it seem like its unconditionally attempting to fetch it.....is this how it should work?

If I run bazel build --nobuild --fetch //... this works expected.

[Xudong Yang]

Looks like this might be similar to https://github.com/bazelbuild/bazel/issues/12861, where `bazel query` causes all match arms to be fetched. So `bazel fetch` might be doing the same thing.

This is arguably a bug, but I don't have enough knowledge about `bazel fetch` (yet) to tell how feasible a fix would be. Good to keep this in mind though.

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