Add support for printing out a summary

taiki-e / cargo-llvm-cov

Cargo subcommand to easily use LLVM source-based code coverage (-C instrument-coverage).

Apache License 2.0

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Add support for printing out a summary #77

Closed Cogitri closed 3 years ago

Cogitri commented 3 years ago

Hello,

I'm currently using cargo-llvm-cov on Gitlab CI. Gitlab CI has a neat feature where it can display the coverage percentage right next to a change if it can parse it from the CI log via Regex. As such it'd be nice if there was a command similar to llvm-cov report which just prints a quick overview of the per-file coverage and the total coverage.

taiki-e commented 3 years ago

The default summary output is the output of llvm-cov report, so I guess it probably works. (I have little experience with GitLab, and I haven't actually tested it)
```
cargo llvm-cov
```
Or you may need to redirect it to stderr (>&2).
If llvm-cov report does not work, lcov --list is likely to work.
```
apt-get install lcov
cargo llvm-cov --lcov --output-path lcov.info
lcov --list lcov.info
```
refs: https://stackoverflow.com/questions/50276744/gitlab-ci-yml-cpp-coverage-report

Cogitri commented 3 years ago

Oh I didn’t realise I can run cargo llvm-cov without an argument like —html or —text. running it like this is exactly what I needed, thanks!