bug#38044: 27.0.50; There should be an easier way to look at a specific vc commit

[Juri Linkov]

> I hoped git would be able to search both sha and commit message
> in one command, something like:
>
>   git log -1 5761a1a393 --grep=5761a1a393
>
> to output the log of sha 5761a1a393, and logs of matching commit messages,
> but this is not possible in git.

We could support a special syntax for sha search, e.g.

  M-x vc-log-search RET sha:5761a1a393 RET

or using quoted strings as sha search instead of text search:

  M-x vc-log-search RET "5761a1a393" RET

or add a rule that if the search string matches only hex numbers
with a regexp like /[0-9A-F]+/, then run sha search:

  M-x vc-log-search RET 5761a1a393 RET

and any other text will run text search:

  M-x vc-log-search RET text RET