Matthieu Moy <Matthieu.Moy@xxxxxxxxxxxxxxx> writes:
> Junio C Hamano <gitster@xxxxxxxxx> writes:
>
>> if (use_global_config) {
>> if (is $HOME/.gitconfig usable?) {
>> use it;
>
> Yes, but when $HOME is unset, the question doesn't really make sense.
> Maybe the file exists, but we can't know since the user broke his
> configuration by unsetting $HOME. The intent was to avoid writing to the
> XDG file unless it was very clear that the user wanted it, so in doubt,
> dying seems the best option.
I would think that it is plausible that the user wanted to write
into XDG one and used "unset HOME" as a way to signal that wish.
Are there ways to force writing into XDG ones without having to
remove the $HOME/ ones (perhaps the user wants to keep them for use
with older versions of Git on a different machine that shares the
same $HOME directory)? Temporarily unsetting HOME may be how a user
might achieve it.
If you want to disallow such a use case, that is fine, but at least
the logic needs to be described in comment. Perhaps based on one of
your rewrites earlier in the thread, like this?
builtin/config.c | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)
diff --git a/builtin/config.c b/builtin/config.c
index 67945b2..a788409 100644
--- a/builtin/config.c
+++ b/builtin/config.c
@@ -387,13 +387,26 @@ int cmd_config(int argc, const char **argv, const char *prefix)
home_config_paths(&user_config, &xdg_config, "config");
- if (user_config && access(user_config, R_OK) &&
+ if (!user_config)
+ /*
+ * We do not know HOME/.gitconfig exists or
+ * not, hence we do not know if we should
+ * write to XDG location, so we error out even
+ * if XDG_CONFIG_HOME is set and points at a
+ * sane location.
+ *
+ * In other words, we forbid the user from
+ * telling us to write to XDG location,
+ * pretending that $HOME/.gitconfig does not
+ * exist, by temporarily unsetting HOME.
+ */
+ die("$HOME not set");
+
+ if (access(user_config, R_OK) &&
xdg_config && !access(xdg_config, R_OK))
given_config_file = xdg_config;
- else if (user_config)
- given_config_file = user_config;
else
- die("$HOME not set");
+ given_config_file = user_config;
}
else if (use_system_config)
given_config_file = git_etc_gitconfig();
--
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