thodg/libgit2

2016-03-10T17:21:02

config_cache: check return value of `git_config__lookup_entry` Callers of `git_config__cvar` already handle the case where the function returns an error due to a failed configuration variable lookup, but we are actually swallowing errors when calling `git_config__lookup_entry` inside of the function. Fix this by returning early when `git_config__lookup_entry` returns an error. As we call `git_config__lookup_entry` with `no_errors == false` which leads us to call `get_entry` with `GET_NO_MISSING` we will not return early when the lookup fails due to a missing entry. Like this we are still able to set the default value of the cvar and exit successfully.

diff --git a/src/config_cache.c b/src/config_cache.c
index c859ec1..dbea871 100644
--- a/src/config_cache.c
+++ b/src/config_cache.c
@@ -86,7 +86,8 @@ int git_config__cvar(int *out, git_config *config, git_cvar_cached cvar)
 	struct map_data *data = &_cvar_maps[(int)cvar];
 	git_config_entry *entry;
 
-	git_config__lookup_entry(&entry, config, data->cvar_name, false);
+	if ((error = git_config__lookup_entry(&entry, config, data->cvar_name, false)) < 0)
+		return error;
 
 	if (!entry)
 		*out = data->default_value;