Re: [PATCH] git config: error when editing a repo config and not being in one

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Felipe Contreras <felipe.contreras@xxxxxxxxx> writes:

> Let's throw an error on this specific case. If the user specifies the
> config file, he must know what he is doing.
>
> Teemu Likonen pointed this out.
>
> Signed-off-by: Felipe Contreras <felipe.contreras@xxxxxxxxx>
> ---
>  builtin-config.c |    2 ++
>  1 files changed, 2 insertions(+), 0 deletions(-)
>
> diff --git a/builtin-config.c b/builtin-config.c
> index d8da72c..6e936e1 100644
> --- a/builtin-config.c
> +++ b/builtin-config.c
> @@ -390,6 +390,8 @@ int cmd_config(int argc, const char **argv, const char *unused_prefix)
>  	}
>  	else if (actions == ACTION_EDIT) {
>  		check_argc(argc, 0, 0);
> +		if (!config_exclusive_filename && !is_inside_git_dir())
> +			die("not in a git directory");
>  		git_config(git_default_config, NULL);
>  		launch_editor(config_exclusive_filename ?
>  			      config_exclusive_filename : git_path("config"),

How could this be correct?

When you are inside a work tree controlled by a git repository, and you
want to edit the configuration file that belongs to the repository, I do
not think is_inside_git_dir() is true.

What you are trying to catch is if $GIT_DIR exists (not in the sense that
"is it a non-empty string?", but in the sense that "does it point at an
existing directory?"), I think.

So perhaps you want to say something like this instead?

No, I did not test it.

 builtin-config.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/builtin-config.c b/builtin-config.c
index d8da72c..a4bd516 100644
--- a/builtin-config.c
+++ b/builtin-config.c
@@ -390,6 +390,12 @@ int cmd_config(int argc, const char **argv, const char *unused_prefix)
 	}
 	else if (actions == ACTION_EDIT) {
 		check_argc(argc, 0, 0);
+		if (!config_exclusive_filename) {
+			const char *git = get_git_dir();
+			struct stat sb;
+			if (!git || stat(git, &sb) || !S_ISDIR(sb.st_mode))
+				die("not in a git directory");
+		}
 		git_config(git_default_config, NULL);
 		launch_editor(config_exclusive_filename ?
 			      config_exclusive_filename : git_path("config"),

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