config: don't implicitly use gitdir or commondir

'git_config_with_options()' takes a 'config_options' struct which
contains feilds for 'git_dir' and 'commondir'.  If those feilds happen
to be NULL the config machinery falls back to querying global repository
state.  Let's change this and instead use these fields in the
'config_options' struct explicilty all the time.  Since the API is
slightly changing to require these two fields to be set if callers want
the config machinery to load the repository's config, let's change the
name to 'config_with_optison()'.  This allows the config machinery to
not implicitly rely on any global repository state.

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: bmwill

builtin/config.c

@@ -243,8 +243,8 @@ static int get_value(const char *key_, const char *regex_)
 		}
 	}
 
-	git_config_with_options(collect_config, &values,
-				&given_config_source, &config_options);
+	config_with_options(collect_config, &values,
+			    &given_config_source, &config_options);
 
 	ret = !values.nr;
 
@@ -321,8 +321,8 @@ static void get_color(const char *var, const char *def_color)
 	get_color_slot = var;
 	get_color_found = 0;
 	parsed_color[0] = '\0';
-	git_config_with_options(git_get_color_config, NULL,
-				&given_config_source, &config_options);
+	config_with_options(git_get_color_config, NULL,
+			    &given_config_source, &config_options);
 
 	if (!get_color_found && def_color) {
 		if (color_parse(def_color, parsed_color) < 0)
@@ -353,8 +353,8 @@ static int get_colorbool(const char *var, int print)
 	get_colorbool_found = -1;
 	get_diff_color_found = -1;
 	get_color_ui_found = -1;
-	git_config_with_options(git_get_colorbool_config, NULL,
-				&given_config_source, &config_options);
+	config_with_options(git_get_colorbool_config, NULL,
+			    &given_config_source, &config_options);
 
 	if (get_colorbool_found < 0) {
 		if (!strcmp(get_colorbool_slot, "color.diff"))
@@ -442,8 +442,8 @@ static int get_urlmatch(const char *var, const char *url)
 		show_keys = 1;
 	}
 
-	git_config_with_options(urlmatch_config_entry, &config,
-				&given_config_source, &config_options);
+	config_with_options(urlmatch_config_entry, &config,
+			    &given_config_source, &config_options);
 
 	ret = !values.nr;
 
@@ -536,6 +536,10 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 		config_options.respect_includes = !given_config_source.file;
 	else
 		config_options.respect_includes = respect_includes_opt;
+	if (!nongit) {
+		config_options.commondir = get_git_common_dir();
+		config_options.git_dir = get_git_dir();
+	}
 
 	if (end_null) {
 		term = '\0';
@@ -580,9 +584,9 @@ int cmd_config(int argc, const char **argv, const char *prefix)
 
 	if (actions == ACTION_LIST) {
 		check_argc(argc, 0, 0);
-		if (git_config_with_options(show_all_config, NULL,
-					    &given_config_source,
-					    &config_options) < 0) {
+		if (config_with_options(show_all_config, NULL,
+					&given_config_source,
+					&config_options) < 0) {
 			if (given_config_source.file)
 				die_errno("unable to read config file '%s'",
 					  given_config_source.file);

config.c

@@ -218,8 +218,6 @@ static int include_by_gitdir(const struct config_options *opts,
 
 	if (opts->git_dir)
 		git_dir = opts->git_dir;
-	else if (have_git_dir())
-		git_dir = get_git_dir();
 	else
 		goto done;
 
@@ -1533,8 +1531,6 @@ static int do_git_config_sequence(const struct config_options *opts,
 
 	if (opts->commondir)
 		repo_config = mkpathdup("%s/config", opts->commondir);
-	else if (have_git_dir())
-		repo_config = git_pathdup("config");
 	else
 		repo_config = NULL;
 
@@ -1565,9 +1561,9 @@ static int do_git_config_sequence(const struct config_options *opts,
 	return ret;
 }
 
-int git_config_with_options(config_fn_t fn, void *data,
-			    struct git_config_source *config_source,
-			    const struct config_options *opts)
+int config_with_options(config_fn_t fn, void *data,
+			struct git_config_source *config_source,
+			const struct config_options *opts)
 {
 	struct config_include_data inc = CONFIG_INCLUDE_INIT;
 
@@ -1598,9 +1594,14 @@ static void git_config_raw(config_fn_t fn, void *data)
 	struct config_options opts = {0};
 
 	opts.respect_includes = 1;
-	if (git_config_with_options(fn, data, NULL, &opts) < 0)
+	if (have_git_dir()) {
+		opts.commondir = get_git_common_dir();
+		opts.git_dir = get_git_dir();
+	}
+
+	if (config_with_options(fn, data, NULL, &opts) < 0)
 		/*
-		 * git_config_with_options() normally returns only
+		 * config_with_options() normally returns only
 		 * zero, as most errors are fatal, and
 		 * non-fatal potential errors are guarded by "if"
 		 * statements that are entered only when no error is
@@ -1660,7 +1661,7 @@ void read_early_config(config_fn_t cb, void *data)
 		opts.git_dir = gitdir.buf;
 	}
 
-	git_config_with_options(cb, data, NULL, &opts);
+	config_with_options(cb, data, NULL, &opts);
 
 	strbuf_release(&commondir);
 	strbuf_release(&gitdir);

config.h

@@ -45,9 +45,9 @@ extern void git_config_push_parameter(const char *text);
 extern int git_config_from_parameters(config_fn_t fn, void *data);
 extern void read_early_config(config_fn_t cb, void *data);
 extern void git_config(config_fn_t fn, void *);
-extern int git_config_with_options(config_fn_t fn, void *,
-				   struct git_config_source *config_source,
-				   const struct config_options *opts);
+extern int config_with_options(config_fn_t fn, void *,
+			       struct git_config_source *config_source,
+			       const struct config_options *opts);
 extern int git_parse_ulong(const char *, unsigned long *);
 extern int git_parse_maybe_bool(const char *);
 extern int git_config_int(const char *, const char *);