environment: make get_graft_file() accept a repository

The `get_graft_file()` function retrieves the path to the graft file of
`the_repository`. Make it accept a `struct repository` such that it can
work on arbitrary repositories and make it part of the repository
subsystem. This reduces our reliance on `the_repository` and clarifies
scope.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

builtin/replace.c

@@ -11,7 +11,6 @@
 #include "builtin.h"
 #include "config.h"
 #include "editor.h"
-#include "environment.h"
 #include "gettext.h"
 #include "hex.h"
 #include "refs.h"
@@ -514,7 +513,7 @@ static int create_graft(int argc, const char **argv, int force, int gentle)
 
 static int convert_graft_file(int force)
 {
-	const char *graft_file = get_graft_file(the_repository);
+	const char *graft_file = repo_get_graft_file(the_repository);
 	FILE *fp = fopen_or_warn(graft_file, "r");
 	struct strbuf buf = STRBUF_INIT, err = STRBUF_INIT;
 	struct strvec args = STRVEC_INIT;

commit.c

@@ -292,14 +292,14 @@ static int read_graft_file(struct repository *r, const char *graft_file)
 
 void prepare_commit_graft(struct repository *r)
 {
-	char *graft_file;
+	const char *graft_file;
 
 	if (r->parsed_objects->commit_graft_prepared)
 		return;
 	if (!startup_info->have_repository)
 		return;
 
-	graft_file = get_graft_file(r);
+	graft_file = repo_get_graft_file(r);
 	read_graft_file(r, graft_file);
 	/* make sure shallows are read */
 	is_repository_shallow(r);

environment.c

@@ -306,13 +306,6 @@ int odb_pack_keep(const char *name)
 	return open(name, O_RDWR|O_CREAT|O_EXCL, 0600);
 }
 
-char *get_graft_file(struct repository *r)
-{
-	if (!r->graft_file)
-		BUG("git environment hasn't been setup");
-	return r->graft_file;
-}
-
 static void set_git_dir_1(const char *path)
 {
 	xsetenv(GIT_DIR_ENVIRONMENT, path, 1);

environment.h

@@ -1,7 +1,6 @@
 #ifndef ENVIRONMENT_H
 #define ENVIRONMENT_H
 
-struct repository;
 struct strvec;
 
 /*
@@ -106,7 +105,6 @@ int have_git_dir(void);
 extern int is_bare_repository_cfg;
 int is_bare_repository(void);
 extern char *git_work_tree_cfg;
-char *get_graft_file(struct repository *r);
 void set_git_dir(const char *path, int make_realpath);
 const char *get_git_namespace(void);
 const char *strip_namespace(const char *namespaced_ref);

repository.c

@@ -119,6 +119,13 @@ const char *repo_get_index_file(struct repository *repo)
 	return repo->index_file;
 }
 
+const char *repo_get_graft_file(struct repository *repo)
+{
+	if (!repo->graft_file)
+		BUG("repository hasn't been set up");
+	return repo->graft_file;
+}
+
 static void repo_set_commondir(struct repository *repo,
 			       const char *commondir)
 {

repository.h

@@ -210,6 +210,7 @@ const char *repo_get_git_dir(struct repository *repo);
 const char *repo_get_common_dir(struct repository *repo);
 const char *repo_get_object_directory(struct repository *repo);
 const char *repo_get_index_file(struct repository *repo);
+const char *repo_get_graft_file(struct repository *repo);
 
 /*
  * Define a custom repository layout. Any field can be NULL, which