remote_coverage_tools / coverage_output_generator-v2.6.zip lacks provenance, instructions to build from source

[ghost]

Description of the bug:

Inside each of the java_tools distribution artifacts is a README.md including instructions to rebuild the artifacts from source.

Example from https://github.com/bazelbuild/java_tools/releases/download/java_v11.7.1/java_tools_linux-v11.7.1.zip

This Java tools version was built from the bazel repository at commit hash 190533739ce4457cd5a3b31573fc2ae66f92d53e
using bazel version 5.1.1 on platform linux.
To build from source the same zip run the commands:

$ git clone https://github.com/bazelbuild/bazel.git
$ git checkout 190533739ce4457cd5a3b31573fc2ae66f92d53e
$ bazel build //src:java_tools_prebuilt.zip

However remote_coverage_tools / coverage_output_generator-v2.6.zip lacks comparable information. As a result, end users have no idea where these bits came from or how to patch and compile this artifact from source.

What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

$ wget https://mirror.bazel.build/bazel_coverage_output_generator/releases/coverage_output_generator-v2.6.zip
$ unzip coverage_output_generator-v2.6.zip
$ ls
all_lcov_merger_tools_deploy.jar  
BUILD  
coverage_output_generator-v2.6.zip  
WORKSPACE

Observe that there is no README. Additionally there are no breadcrumbs in the included all_lcov_merger_tools_deploy.jar. (I see no hints of build stamping.)

Which operating system are you running Bazel on?

Linux (CentOS 8)

What is the output of bazel info release?

release 5.1.1

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 master; 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

[comius]

cc @c-mita

[github-actions]

Thank you for contributing to the Bazel repository! This issue has been marked as stale since it has not had any activity in the last 1+ years. It will be closed in the next 90 days unless any other activity occurs or one of the following labels is added: "not stale", "awaiting-bazeler". Please reach out to the triage team (@bazelbuild/triage) if you think this issue is still relevant or you are interested in getting the issue resolved.

[ghost]

It will be closed in the next 90 days unless any other activity occurs

This is still valid today.

[ulfjack]

I believe the coverage output generator jar is built from here: https://github.com/bazelbuild/bazel/blob/master/tools/test/CoverageOutputGenerator/java/com/google/devtools/coverageoutputgenerator/Main.java

[hauserx]

Just for reference, seems the build instructions are here, and looks like building it is a manual process:

https://github.com/bazelbuild/bazel/blob/master/src/main/java/com/google/devtools/build/lib/bazel/rules/BUILD

# To generate an updated version of CoverageOutputGenerator:
# 1. bazel build tools/test/CoverageOutputGenerator/java/com/google/devtools/coverageoutputgenerator:coverage_output_generator_zip
# 2. Copy and rename the zip file with a new version locally.
# 3. Upload the file under https://mirror.bazel.build/bazel_coverage_output_generator/releases.
# 4. Update //workspace_deps.bzl and //tools/test/extensions.bzl to point to the new release.