I'm trying to use the llvm-cov report
command to gather code coverage results in CI builds.
When using the swiftlang/swift:nightly-5.2
image locally, I get the expected output.
However, when running the exact same invocation of llvm-cov report
in the exact same image in GitLab CI, I get no results. (reports no sources and 0 code coverage in the table).
GitLab CI reports:
Using docker image sha256:85d532e49acb8a1baeb0c0078459858c777769ab080cc114d9cb1bfb652294f2...
...
$ swift --version
Swift version 5.2-dev (Swift 66c06abcc8)
Target: x86_64-unknown-linux-gnu
$ llvm-cov --version
LLVM (http://llvm.org/):
LLVM version 7.0.0svn
Optimized build with assertions.
Default target: x86_64-unknown-linux-gnu
Host CPU: haswell
Docker reports the following locally:
REPOSITORY TAG IMAGE ID
swiftlang/swift nightly-5.2 85d532e49acb
Locally, the digest SHA is 7e39bbfe840780d0dcffad0d9881cfc9b2fdca74dbdbb743f5a5c777a2271074
, which matches the digest of the image as reported by Docker Hub.
What could be causing this?