Allow dynamic log path location in .bazelrc

[ssarad]

Description of the feature request:

Allow .bazelrc file to have a variable that points to the root of the project (for example: %workspace). Unfortunately %workspace% does not work when specifying the path to logs as it appends %workspace% as a string, not a variable.

build:trace --execution_log_json_file=%workspace%/Bazel/tmp/logs/execution.json

---

A currently work around is to edit tools/bazel, grab the current path to root of the project and echo the following to a Bazel/tmp/local.bazelrc file

echo "build:trace --execution_log_json_file=$script_root/../Bazel/tmp/logs/execution.json" > Bazel/tmp/local.bazelrc

Then, import local.bazelrcin the project's .bazelrc using try-import

try-import %workspace%/Bazel/tmp/xcode.bazelrc

Which category does this issue belong to?

CLI, Configurability

What underlying problem are you trying to solve with this feature?

Currently, if we want to specify a location to the logs, we can add the following in the .bazelrc file

build:trace --execution_log_json_file=Bazel/tmp/logs/execution_logs.json

This works fine if a Bazel command is executed from the root of the project but if we run a Bazel command from a subdirectory inside the project, Bazel attempts to search for the path in such manner:

pwd + Bazel/tmp/logs/execution_logs.json

This makes the path mention to dump the logs in the .bazelrc file as an invalid path

Which operating system are you running Bazel on?

MacOS Sonoma 14.4.1

What is the output of bazel info release?

INFO: Invocation ID: c18d31dc-3cbd-4cc0-864b-aff070099dee release 6.4.0

If bazel info release returns development version or (@non-git), tell us how you built Bazel.

No response

What's the output of git remote get-url origin; git rev-parse HEAD ?

No response

Have you found anything relevant by searching the web?

No response

Any other information, logs, or outputs that you want to share?

No response

[meisterT]

@michajlo it seems to me discussed this before?