llvm dev - Aug 2019 - Llvm-cov: how to fold parts of a coverage summary by subdirectory?

Hi all,

Does llvm-cov support folding parts of a coverage summary by subdirectory in
html format? My users have lots of test cases in different directories, and
llvm-cov lists all cases in one html with no folding. What I want is that
llvm-cov can show these cases folded by their subdirectories, like gcov/lcov
way. An example of comparison llvm-cov and gcov/lcov is here.
Llvm-cov: http://lab.llvm.org:8080/coverage/coverage-reports/llvm/index.html
Gcov/lcov: http://llvm.org/reports/coverage/
I see similar requirements in
http://lists.llvm.org/pipermail/llvm-dev/2017-October/118428.html but not sure
whether this feature has been achieved. Is there any patch or script for this
requirement?

Best,
Ruobin
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