Re: [PATCH v2 2/2] worktree: add per-worktree config files

> A new repo extension is added, worktreeConfig. When it is present:
> [...]
> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
> ---
> diff --git a/Documentation/config.txt b/Documentation/config.txt
> @@ -2,8 +2,9 @@ CONFIGURATION FILE
>  The Git configuration file contains a number of variables that affect
> +the Git commands' behavior. The files `.git/config` and optionally
> +`config.worktree` (see `extensions.worktreeConfig` below) in each
> +repository is used to store the configuration for that repository, and

>  `$HOME/.gitconfig` is used to store a per-user configuration as
>  fallback values for the `.git/config` file. The file `/etc/gitconfig`
>  can be used to store a system-wide default configuration.
> diff --git a/Documentation/git-worktree.txt b/Documentation/git-worktree.txt
> @@ -204,6 +204,36 @@ working trees, it can be used to identify worktrees. For example if
> +CONFIGURATION FILE
> +------------------
> +In this mode, specific configuration stays in the path pointed by `git
> +rev-parse --git-path config.worktree`. You can add or update
> +configuration in this file with `git config --worktree`. Older Git
> +versions may will refuse to access repositories with this extension.

> diff --git a/builtin/config.c b/builtin/config.c
> @@ -645,7 +649,20 @@ int cmd_config(int argc, const char **argv, const char *prefix)
> +       else if (use_worktree_config) {
> +               struct worktree **worktrees = get_worktrees(0);
> +               if (repository_format_worktree_config)
> +                       given_config_source.file = git_pathdup("config.worktree");
> +               else if (worktrees[0] && worktrees[1])
> +                       die(_("--worktree cannot be used with multiple "
> +                             "working trees unless the config\n"
> +                             "extension worktreeConfig is enabled. "
> +                             "Please read \"CONFIGURATION FILE\"\n"
> +                             "section in \"git help worktree\" for details"));
> +               else
> +                       given_config_source.file = git_pathdup("config");