Initial Version Creation Fails on Some Git Repositories

Summary

When first running npx nx run <project>:version on some repositories where the command git rev-list --max-parents=0 HEAD returns more than 1 commit, the target fails with a “bad revision” error.

Steps to Recreate

1. Create a git repo with an initial commit
2. Create a second git repo with a commit and some history
3. Use some stack overflow post to merge the two repos together that maintains history for both. The exact post I have unfortunately forgotten. Probably something to do with filter-branch.

Solution

Fix the output of this function so that it will split the results on newlines and just pick the first valid commit SHA. The current code ends up concating all the commit SHAs together resulting in an invalid ref.

Work Arounds

Manually create the first tag with <project>-0.0.1 and not <project>-0.0.0 because using 0.0.0 will result in the plugin trying to find that first commit in the repo.

[ianldgs]

@edbzn friendly ping. Engineers on our repo are having to manually create a tag when adding new libraries. This is not a good experience 🙈

[wSedlacek]

I was also noticing that the initial creation was failing unless I manually created a CHANGELOG.md for each project.