config: make git_config_include() static

It is not used from outside the file in which it is declared.

Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Acked-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

config.c

@@ -120,6 +120,16 @@ static long config_buf_ftell(struct config_source *conf)
 	return conf->u.buf.pos;
 }
 
+struct config_include_data {
+	int depth;
+	config_fn_t fn;
+	void *data;
+	const struct config_options *opts;
+};
+#define CONFIG_INCLUDE_INIT { 0 }
+
+static int git_config_include(const char *var, const char *value, void *data);
+
 #define MAX_INCLUDE_DEPTH 10
 static const char include_depth_advice[] = N_(
 "exceeded maximum include depth (%d) while including\n"
@@ -309,7 +319,7 @@ static int include_condition_is_true(const struct config_options *opts,
 	return 0;
 }
 
-int git_config_include(const char *var, const char *value, void *data)
+static int git_config_include(const char *var, const char *value, void *data)
 {
 	struct config_include_data *inc = data;
 	const char *cond, *key;

config.h

@@ -126,6 +126,8 @@ int git_default_config(const char *, const char *, void *);
 /**
  * Read a specific file in git-config format.
  * This function takes the same callback and data parameters as `git_config`.
+ *
+ * Unlike git_config(), this function does not respect includes.
  */
 int git_config_from_file(config_fn_t fn, const char *, void *);
 
@@ -158,6 +160,8 @@ void read_very_early_config(config_fn_t cb, void *data);
  * will first feed the user-wide one to the callback, and then the
  * repo-specific one; by overwriting, the higher-priority repo-specific
  * value is left at the end).
+ *
+ * Unlike git_config_from_file(), this function respects includes.
  */
 void git_config(config_fn_t fn, void *);
 
@@ -338,39 +342,6 @@ const char *current_config_origin_type(void);
 const char *current_config_name(void);
 int current_config_line(void);
 
-/**
- * Include Directives
- * ------------------
- *
- * By default, the config parser does not respect include directives.
- * However, a caller can use the special `git_config_include` wrapper
- * callback to support them. To do so, you simply wrap your "real" callback
- * function and data pointer in a `struct config_include_data`, and pass
- * the wrapper to the regular config-reading functions. For example:
- *
- * -------------------------------------------
- * int read_file_with_include(const char *file, config_fn_t fn, void *data)
- * {
- * struct config_include_data inc = CONFIG_INCLUDE_INIT;
- * inc.fn = fn;
- * inc.data = data;
- * return git_config_from_file(git_config_include, file, &inc);
- * }
- * -------------------------------------------
- *
- * `git_config` respects includes automatically. The lower-level
- * `git_config_from_file` does not.
- *
- */
-struct config_include_data {
-	int depth;
-	config_fn_t fn;
-	void *data;
-	const struct config_options *opts;
-};
-#define CONFIG_INCLUDE_INIT { 0 }
-int git_config_include(const char *name, const char *value, void *data);
-
 /*
  * Match and parse a config key of the form:
  *