gert and git do not agree on what order to read the config

[zkamvar]

It looks like {gert} prioritizes config items from top to bottom, but command line git prioritizes bottom to top in the case of duplicate keys.

I have a situation where I want to use a different set of credentials for a project. I found the IncludeIf directive for .gitconfig files from https://nicknisi.com/posts/git-includeif/ and I applied it like so:

[user]
    name="Clark"
    email=clark@email.com

[credential]
    helper=/path/to/helper

# ... gitconfig stuff ...

[includeIf "gitdir:/path/to/project"]
  path = ~/.gitconfig-pat

and in my ~/.gitconfig-pat I have it set up to use the GitHub credentials for "Bizarro" in which I provision a temporary PAT inside of an environmental variable called BIZARRO_TOKEN a la https://git-scm.com/docs/gitfaq#http-credentials-environment

[user]
    name="Bizarro"
    email=clark+bizarro@email.com

[credential]
    helper = '!f() {echo username=clark-is-not-bizarro && echo "password=${BIZARRO_TOKEN}"};f'

When I run git from /path/to/project in the command line, I can commit, push, and pull as "Bizarro", but if I open R and run {gert} from the same directory, I am recognized as "Clark".

If I move the IncludeIf statement to the top of the file, then {gert} will recognize "Bizarro", but git will recognise "Clark"

[jeroen]

I think you need to ask this upstream in libgit2. We don't control any if this from gert.

[maelle]

Or could you change the local git config from within your project's .Rprofile @zkamvar?

[zkamvar]

I haven't thought about that. How would you go about that? Would you append the local .gitconfig when R starts and then delete the appended portion when it exits?

[maelle]

There's no interface currently for unsetting one of the values of a config variable (but there might be soon #264).

But using the code in #270 you could do

  orig <- git_config_set("some.option", "temporary_value")
  on.exit(git_config_set("some.option", orig))

At least I think so? See also #268