Why does "bazel build" download data runtime dependencies?

[Carlos Galvez]

Hi,

Having the following:

cc_binary(

  name = "foo",

  srcs = ["foo.cpp"],

  data = ["@some//:files"],  # Very large, gigabytes

)

Where:

filegroup(

  name = "files",

  data = [ ... ],

)

And the "@some" repository comes from an "http_archive".

If I run "bazel build //path/to:foo", it downloads GB's of runtime data dependencies, that are not needed to simply build C++ code.

Why are these runtime data dependencies downloaded at "build" time? Is there a way to avoid this, and download only at "run" time? This causes great trouble for build and lint actions that don't depend on the data.

Thanks!

  

[Xudong Yang]

See https://github.com/bazelbuild/bazel/issues/15017; this is intended behavior.

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