config: teach git_config_source to remember its scope

There are many situations where the scope of a config command is known
beforehand, such as passing of '--local', '--file', etc. to an
invocation of git config.  However, this information is lost when moving
from builtin/config.c to /config.c.  This historically hasn't been a big
deal, but to prepare for the upcoming --show-scope option we teach
git_config_source to keep track of the source and the config machinery
to use that information to set current_parsing_scope appropriately.

Signed-off-by: Matthew Rogers <mattr94@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/config.c

@@ -622,6 +622,7 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 			!strcmp(given_config_source.file, "-")) {
 		given_config_source.file = NULL;
 		given_config_source.use_stdin = 1;
+		given_config_source.scope = CONFIG_SCOPE_COMMAND;
 	}
 
 	if (use_global_config) {
@@ -637,6 +638,8 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 			 */
 			die(_("$HOME not set"));
 
+		given_config_source.scope = CONFIG_SCOPE_GLOBAL;
+
 		if (access_or_warn(user_config, R_OK, 0) &&
 		    xdg_config && !access_or_warn(xdg_config, R_OK, 0)) {
 			given_config_source.file = xdg_config;
@@ -646,11 +649,13 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 			free(xdg_config);
 		}
 	}
-	else if (use_system_config)
+	else if (use_system_config) {
 		given_config_source.file = git_etc_gitconfig();
-	else if (use_local_config)
+		given_config_source.scope = CONFIG_SCOPE_SYSTEM;
+	} else if (use_local_config) {
 		given_config_source.file = git_pathdup("config");
-	else if (use_worktree_config) {
+		given_config_source.scope = CONFIG_SCOPE_LOCAL;
+	} else if (use_worktree_config) {
 		struct worktree **worktrees = get_worktrees(0);
 		if (repository_format_worktree_config)
 			given_config_source.file = git_pathdup("config.worktree");
@@ -662,13 +667,18 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 			      "section in \"git help worktree\" for details"));
 		else
 			given_config_source.file = git_pathdup("config");
+		given_config_source.scope = CONFIG_SCOPE_LOCAL;
 		free_worktrees(worktrees);
 	} else if (given_config_source.file) {
 		if (!is_absolute_path(given_config_source.file) && prefix)
 			given_config_source.file =
 				prefix_filename(prefix, given_config_source.file);
+		given_config_source.scope = CONFIG_SCOPE_COMMAND;
+	} else if (given_config_source.blob) {
+		given_config_source.scope = CONFIG_SCOPE_COMMAND;
 	}
 
+
 	if (respect_includes_opt == -1)
 		config_options.respect_includes = !given_config_source.file;
 	else

config.c

@@ -1763,6 +1763,9 @@ int config_with_options(config_fn_t fn, void *data,
 		data = &inc;
 	}
 
+	if (config_source)
+		current_parsing_scope = config_source->scope;
+
 	/*
 	 * If we have a specific filename, use it. Otherwise, follow the
 	 * regular lookup sequence.

config.h

@@ -35,10 +35,21 @@ struct object_id;
 
 #define CONFIG_REGEX_NONE ((void *)1)
 
+enum config_scope {
+	CONFIG_SCOPE_UNKNOWN = 0,
+	CONFIG_SCOPE_SYSTEM,
+	CONFIG_SCOPE_GLOBAL,
+	CONFIG_SCOPE_LOCAL,
+	CONFIG_SCOPE_WORKTREE,
+	CONFIG_SCOPE_COMMAND,
+};
+const char *config_scope_name(enum config_scope scope);
+
 struct git_config_source {
 	unsigned int use_stdin:1;
 	const char *file;
 	const char *blob;
+	enum config_scope scope;
 };
 
 enum config_origin_type {
@@ -294,16 +305,6 @@ int config_error_nonbool(const char *);
 
 int git_config_parse_parameter(const char *, config_fn_t fn, void *data);
 
-enum config_scope {
-	CONFIG_SCOPE_UNKNOWN = 0,
-	CONFIG_SCOPE_SYSTEM,
-	CONFIG_SCOPE_GLOBAL,
-	CONFIG_SCOPE_LOCAL,
-	CONFIG_SCOPE_WORKTREE,
-	CONFIG_SCOPE_COMMAND,
-};
-const char *config_scope_name(enum config_scope scope);
-
 enum config_scope current_config_scope(void);
 const char *current_config_origin_type(void);
 const char *current_config_name(void);