Oh-my-zsh in .gitconfig template

[claughinghouse]

I manage my .gitconfig with chezmoi but recently started running into an issue where chezmoi tries to overwrite the key that omz sets in the gitconfig:

[oh-my-zsh]
	git-commit-alias = xxyyzzlongsha

I tried writing a template to just ignore the line since chezmoi currently supports excluding directories, not lines in files this way:

{{ if eq true false }}
[oh-my-zsh]
	git-commit-alias = xxyyzzlongsha
{{ end }}

But each time I tun omz update the sha changes and chezmoi catches it on next update. Is there a elegant way to ignore whatever the value of git-commit-alias within chezmoi?

[bradenhilton]

If you can't prevent Oh My Zsh from writing to .gitconfig, you may need to use a modify_ script or template.

Handle configuration files which are externally modified may also be useful.

[twpayne]

Another, admittedly hacky, option is to make .gitconfig a template and extract the value written by Oh My Zsh. Something like:

[oh-my-zsh]
    git-commit-alias = {{ index (output "grep" "git-commit-alias" (joinPath .chezmoi.homeDir ".gitconfig") | splitList "=") 1 | trim }}

This is really ugly though.

[claughinghouse]

This is similar to what I was able to come up with (mine is also abeit ugly) since my gitconfig was already a template:

{{- $homeDir := .chezmoi.homeDir }}
{{- $zshDir := printf "%s/.oh-my-zsh" $homeDir }}
{{ $gitHash := output "git" "-C" $zshDir "rev-parse" "HEAD" | trim }}

[oh-my-zsh]
  git-commit-alias = {{ $gitHash }}