Filter out or collapse merge commits in the Commits panel

[levabala]

Is your feature request related to a problem? Please describe.

In big monorepos merge commits make the Commits log unusable

Describe the solution you'd like

Commit Log Options to hide/collapse merge commits

Describe alternatives you've considered

Not using the Commit panel and switching to git log --oneline trunk..HEAD or git log --first-parent --no-merges

Additional context

There is a proof of concept https://github.com/levabala/lazygit/tree/feature/collapse-merge-commits

Related issues:
#3575

[stefanhaller]

I understand the desire to have a --first-parent log in the commits panel, but unfortunately a simplistic approach like in your proof of concept branch doesn't work. A lot of lazygit's code relies on the assumption that every commit is present in the log, so commands like ctrl-j/ctrl-k to move commits up and down would behave very badly, and that's just one example. A somewhat related issue is #3608. We'd first have to fix all these problems before we can offer a --first-parent log, and that's probably a lot of work.

[levabala]

@stefanhaller I can imagine some kind of readonly mode for the --first-parent option when enabled (because in the essence it's just a "view filter"), but I suppose there are other non-edit features broken as well (git graph?). But yes, reasonable, it seems like a feature that breaks too much.
Thanks for your response.