config: remove the refresh function and backend field

We have been refreshing on read and write for a while now, so
git_config_refresh() is at best a no-op, and might just end up wasting
cycles.

include/git2/config.h

@@ -242,20 +242,6 @@ GIT_EXTERN(int) git_config_open_global(git_config **out, git_config *config);
  */
 GIT_EXTERN(int) git_config_snapshot(git_config **out, git_config *config);
 
-
-/**
- * Reload changed config files
- *
- * A config file may be changed on disk out from under the in-memory
- * config object.  This function causes us to look for files that have
- * been modified since we last loaded them and refresh the config with
- * the latest information.
- *
- * @param cfg The configuration to refresh
- * @return 0 or an error code
- */
-GIT_EXTERN(int) git_config_refresh(git_config *cfg);
-
 /**
  * Free the configuration and its associated memory and files
  *

include/git2/sys/config.h

@@ -63,7 +63,6 @@ struct git_config_backend {
 	int (*del)(struct git_config_backend *, const char *key);
 	int (*del_multivar)(struct git_config_backend *, const char *key, const char *regexp);
 	int (*iterator)(git_config_iterator **, struct git_config_backend *);
-	int (*refresh)(struct git_config_backend *);
 	/** Produce a read-only version of this backend */
 	int (*snapshot)(struct git_config_backend **, struct git_config_backend *);
 	void (*free)(struct git_config_backend *);

src/checkout.c

@@ -2038,8 +2038,7 @@ static int checkout_data_init(
 	if ((data->opts.checkout_strategy & GIT_CHECKOUT_NO_REFRESH) == 0) {
 		git_config *cfg;
 
-		if ((error = git_repository_config__weakptr(&cfg, repo)) < 0 ||
-			(error = git_config_refresh(cfg)) < 0)
+		if ((error = git_repository_config__weakptr(&cfg, repo)) < 0)
 			goto cleanup;
 
 		/* Get the repository index and reload it (unless we're checking

src/config.c

@@ -326,23 +326,6 @@ int git_config_add_backend(
 	return 0;
 }
 
-int git_config_refresh(git_config *cfg)
-{
-	int error = 0;
-	size_t i;
-
-	for (i = 0; i < cfg->files.length && !error; ++i) {
-		file_internal *internal = git_vector_get(&cfg->files, i);
-		git_config_backend *file = internal->file;
-		error = file->refresh(file);
-	}
-
-	if (!error && GIT_REFCOUNT_OWNER(cfg) != NULL)
-		git_repository__cvar_cache_clear(GIT_REFCOUNT_OWNER(cfg));
-
-	return error;
-}
-
 /*
  * Loop over all the variables
  */

src/config_file.c

@@ -698,7 +698,6 @@ int git_config_file__ondisk(git_config_backend **out, const char *path)
 	backend->header.parent.del = config_delete;
 	backend->header.parent.del_multivar = config_delete_multivar;
 	backend->header.parent.iterator = config_iterator_new;
-	backend->header.parent.refresh = config_refresh;
 	backend->header.parent.snapshot = config_snapshot;
 	backend->header.parent.free = backend_free;
 
@@ -744,13 +743,6 @@ static int config_delete_readonly(git_config_backend *cfg, const char *name)
 	return config_error_readonly();
 }
 
-static int config_refresh_readonly(git_config_backend *cfg)
-{
-	GIT_UNUSED(cfg);
-
-	return config_error_readonly();
-}
-
 static void backend_readonly_free(git_config_backend *_backend)
 {
 	diskfile_backend *backend = (diskfile_backend *)_backend;
@@ -804,7 +796,6 @@ int git_config_file__snapshot(git_config_backend **out, diskfile_backend *in)
 	backend->header.parent.del = config_delete_readonly;
 	backend->header.parent.del_multivar = config_delete_multivar_readonly;
 	backend->header.parent.iterator = config_iterator_new;
-	backend->header.parent.refresh = config_refresh_readonly;
 	backend->header.parent.free = backend_readonly_free;
 
 	*out = (git_config_backend *)backend;

tests/config/include.c

@@ -51,29 +51,6 @@ void test_config_include__homedir(void)
 	cl_sandbox_set_search_path_defaults();
 }
 
-void test_config_include__refresh(void)
-{
-	git_config *cfg;
-	const char *str;
-
-	cl_fixture_sandbox("config");
-
-	cl_git_pass(git_config_open_ondisk(&cfg, "config/config-include"));
-
-	cl_git_pass(git_config_get_string(&str, cfg, "foo.bar.baz"));
-	cl_assert_equal_s(str, "huzzah");
-
-	/* Change the included file and see if we refresh */
-	cl_git_mkfile("config/config-included", "[foo \"bar\"]\nbaz = hurrah");
-	cl_git_pass(git_config_refresh(cfg));
-
-	cl_git_pass(git_config_get_string(&str, cfg, "foo.bar.baz"));
-	cl_assert_equal_s(str, "hurrah");
-
-	git_config_free(cfg);
-	cl_fixture_cleanup("config");
-}
-
 /* We need to pretend that the variables were defined where the file was included */
 void test_config_include__ordering(void)
 {

tests/config/refresh.c

-#include "clar_libgit2.h"
-
-#define TEST_FILE "config.refresh"
-
-void test_config_refresh__initialize(void)
-{
-}
-
-void test_config_refresh__cleanup(void)
-{
-	cl_fixture_cleanup(TEST_FILE);
-}
-
-void test_config_refresh__update_value(void)
-{
-	git_config *cfg;
-	int32_t v;
-
-	cl_git_mkfile(TEST_FILE, "[section]\n\tvalue = 1\n\n");
-
-	/* By freeing the config, we make sure we flush the values  */
-	cl_git_pass(git_config_open_ondisk(&cfg, TEST_FILE));
-
-	cl_git_pass(git_config_get_int32(&v, cfg, "section.value"));
-	cl_assert_equal_i(1, v);
-
-	cl_git_rewritefile(TEST_FILE, "[section]\n\tvalue = 10\n\n");
-
-	cl_git_pass(git_config_refresh(cfg));
-
-	cl_git_pass(git_config_get_int32(&v, cfg, "section.value"));
-	cl_assert_equal_i(10, v);
-
-	git_config_free(cfg);
-}
-
-void test_config_refresh__delete_value(void)
-{
-	git_config *cfg;
-	int32_t v;
-
-	cl_git_mkfile(TEST_FILE, "[section]\n\tvalue = 1\n\n");
-
-	/* By freeing the config, we make sure we flush the values  */
-	cl_git_pass(git_config_open_ondisk(&cfg, TEST_FILE));
-
-	cl_git_pass(git_config_get_int32(&v, cfg, "section.value"));
-	cl_assert_equal_i(1, v);
-	cl_git_fail(git_config_get_int32(&v, cfg, "section.newval"));
-
-	cl_git_rewritefile(TEST_FILE, "[section]\n\tnewval = 10\n\n");
-
-	cl_git_fail_with(GIT_ENOTFOUND, git_config_get_int32(&v, cfg, "section.value"));
-
-	cl_git_pass(git_config_get_int32(&v, cfg, "section.newval"));
-
-	cl_git_pass(git_config_refresh(cfg));
-
-	cl_git_fail(git_config_get_int32(&v, cfg, "section.value"));
-	cl_git_pass(git_config_get_int32(&v, cfg, "section.newval"));
-	cl_assert_equal_i(10, v);
-
-	git_config_free(cfg);
-}

tests/config/write.c

@@ -340,10 +340,5 @@ void test_config_write__outside_change(void)
 	cl_git_pass(git_config_get_int32(&tmp, cfg, "old.value"));
 	cl_assert_equal_i(6, tmp);
 
-	cl_git_pass(git_config_refresh(cfg));
-
-	cl_git_pass(git_config_get_int32(&tmp, cfg, "old.value"));
-	cl_assert_equal_i(6, tmp);
-
 	git_config_free(cfg);
 }