github: Attempt to work around coverage root path.

[ossama-othman]

Coveralls isn't showing the source code if the user isn't logged in.
Attempt to work around the issue by setting source paths.

[coveralls]

Pull Request Test Coverage Report for Build 1344590079

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 47.333%

---

Totals
Change from base Build 1343972186:	0.0%
Covered Lines:	914
Relevant Lines:	1931

---

💛 - Coveralls

[ossama-othman]

Source code is now visible on the Coveralls, but I'm not sure if this fixed pull request fixed the problem. At the very least it matches what the Coverall GitHub Action documentation suggests.

[ossama-othman]

Source code is now visible on the Coveralls, but I'm not sure if this fixed pull request fixed the problem. At the very least it matches what the Coverall GitHub Action documentation suggests.

Scratch that. The problem still exists. Working on it ...

[ossama-othman]

The Coveralls behavior we're seeing may be as designed: lemurheavy/coveralls-public#1579

[mjmartineau]

I logged in to Coveralls.io with my github credentials, and can see the line-by-line coverage view now.