git_log() hides commits to branches before merge

[lorenzwalthert]

It seems only merge commits and commits made directly to the branch are shown in version 1.0.1 - those merged into the current branch via a merge are omitted. Here is the log of https://github.com/r-lib/styler via the git RStudio panel and gert::git_log(). Is there a way to also show these commits?

[jeroen]

That's a good idea. Right now we only show the main branch log, indeed, and not the merged branches.

[lorenzwalthert]

Yes. I think think by default the command should show what its cli equivalent shows. Because this is unexpected for me and I am not sure I understand the rationale behind it.

[jeroen]

Will look into this for the next version, but if you need a quick solution right now, below an example how to lookup the commits from a merged branch:

git_merged_branch_log <- function(commit){
  parents <- git_commit_info(commit)$parents
  if(length(parents) == 1)
    return(NULL)
  start_at <- git_merge_find_base(parents[1], parents[2])
  sublog <- git_log(parents[2])
  len <- which(sublog$commit == start_at)
  utils::head(sublog, len-1)
}

# Show merge branches for 10 latest commits
main <- git_log()
lapply(main$commit[1:10], git_merged_branch_log)

[lorenzwalthert]

Thanks @jeroen. What I am after finally is the equivalent of $ git log, but I just need the hashes, so I already resolved this with system2('git', c('rev-list', 'HEAD'), stdout = TRUE). I know that's probably not the nice way but until the next release, I'll use this. Thanks again.