[PATCH] config: add string mapping for enum config_scope

[Emily Shaffer <emilyshaffer@google.com>]

If a user is interacting with their config files primarily by the 'git
config' command, using the location flags (--global, --system, etc) then
they may be more interested to see the scope of the config file they are
editing, rather than the filepath.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
---
Note: This commit has been cherry-picked out of the "configuration-based
hook management" topic, at
lore.kernel.org/git/20191210023335.49987-1-emilyshaffer@google.com

It turned out that I wanted to use it for git-bugreport as well - to
explain the origin of the configs we are printing in the bugreport,
without directly exposing the user's home directory path.

This seems to have similar work to https://github.com/gitgitgadget/git/pull/478
which I believe hasn't been mailed yet; but that change is targeted
towards the builtin config command, rather than the config library.
Since I wanted to use the library, I'm sending on my own now. Maybe
this commit will be useful to that change's author.

 - Emily

 config.c | 17 +++++++++++++++++
 config.h |  1 +
 2 files changed, 18 insertions(+)

diff --git a/config.c b/config.c
index e7052b3977..a20110e016 100644
--- a/config.c
+++ b/config.c
@@ -3312,6 +3312,23 @@ enum config_scope current_config_scope(void)
 		return current_parsing_scope;
 }
 
+const char *config_scope_to_string(enum config_scope scope)
+{
+	switch (scope) {
+	case CONFIG_SCOPE_SYSTEM:
+		return _("system");
+	case CONFIG_SCOPE_GLOBAL:
+		return _("global");
+	case CONFIG_SCOPE_REPO:
+		return _("repo");
+	case CONFIG_SCOPE_CMDLINE:
+		return _("cmdline");
+	case CONFIG_SCOPE_UNKNOWN:
+	default:
+		return _("unknown");
+	}
+}
+
 int lookup_config(const char **mapping, int nr_mapping, const char *var)
 {
 	int i;
diff --git a/config.h b/config.h
index 91fd4c5e96..c8bf296dcc 100644
--- a/config.h
+++ b/config.h
@@ -303,6 +303,7 @@ enum config_scope {
 };
 
 enum config_scope current_config_scope(void);
+const char *config_scope_to_string(enum config_scope);
 const char *current_config_origin_type(void);
 const char *current_config_name(void);
 
-- 
2.24.0.525.g8f36a354ae-goog