environment: make get_git_work_tree() accept a repository

The `get_git_work_tree()` function retrieves the path of the work tree
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 <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/blame.c

@@ -1081,7 +1081,7 @@ parse_done:
 			path = add_prefix(prefix, argv[1]);
 			argv[1] = argv[2];
 		} else {	/* (2a) */
-			if (argc == 2 && is_a_rev(argv[1]) && !get_git_work_tree())
+			if (argc == 2 && is_a_rev(argv[1]) && !repo_get_work_tree(the_repository))
 				die("missing <path> to blame");
 			path = add_prefix(prefix, argv[argc - 1]);
 		}

builtin/difftool.c

@@ -378,7 +378,7 @@ static int run_dir_diff(const char *extcmd, int symlinks, const char *prefix,
 	struct hashmap wt_modified, tmp_modified;
 	int indices_loaded = 0;
 
-	workdir = get_git_work_tree();
+	workdir = repo_get_work_tree(the_repository);
 
 	/* Setup temp directories */
 	tmp = getenv("TMPDIR");
@@ -739,7 +739,7 @@ int cmd_difftool(int argc, const char **argv, const char *prefix)
 	if (!no_index){
 		setup_work_tree();
 		setenv(GIT_DIR_ENVIRONMENT, absolute_path(repo_get_git_dir(the_repository)), 1);
-		setenv(GIT_WORK_TREE_ENVIRONMENT, absolute_path(get_git_work_tree()), 1);
+		setenv(GIT_WORK_TREE_ENVIRONMENT, absolute_path(repo_get_work_tree(the_repository)), 1);
 	} else if (dir_diff)
 		die(_("options '%s' and '%s' cannot be used together"), "--dir-diff", "--no-index");
 

builtin/fsmonitor--daemon.c

@@ -2,7 +2,6 @@
 #include "abspath.h"
 #include "config.h"
 #include "dir.h"
-#include "environment.h"
 #include "gettext.h"
 #include "parse-options.h"
 #include "fsmonitor-ll.h"
@@ -1291,7 +1290,8 @@ static int fsmonitor_run_daemon(void)
 
 	/* Prepare to (recursively) watch the <worktree-root> directory. */
 	strbuf_init(&state.path_worktree_watch, 0);
-	strbuf_addstr(&state.path_worktree_watch, absolute_path(get_git_work_tree()));
+	strbuf_addstr(&state.path_worktree_watch,
+		      absolute_path(repo_get_work_tree(the_repository)));
 	state.nr_paths_watching = 1;
 
 	strbuf_init(&state.alias.alias, 0);

builtin/init-db.c

@@ -231,9 +231,9 @@ int cmd_init_db(int argc, const char **argv, const char *prefix)
 			set_git_work_tree(work_tree);
 		else
 			set_git_work_tree(git_work_tree_cfg);
-		if (access(get_git_work_tree(), X_OK))
+		if (access(repo_get_work_tree(the_repository), X_OK))
 			die_errno (_("Cannot access work tree '%s'"),
-				   get_git_work_tree());
+				   repo_get_work_tree(the_repository));
 	}
 	else {
 		if (real_git_dir)

builtin/reset.c

@@ -26,6 +26,7 @@
 #include "object-name.h"
 #include "parse-options.h"
 #include "path.h"
+#include "repository.h"
 #include "unpack-trees.h"
 #include "cache-tree.h"
 #include "setup.h"
@@ -441,7 +442,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 	else
 		trace2_cmd_mode(reset_type_names[reset_type]);
 
-	if (reset_type != SOFT && (reset_type != MIXED || get_git_work_tree()))
+	if (reset_type != SOFT && (reset_type != MIXED || repo_get_work_tree(the_repository)))
 		setup_work_tree();
 
 	if (reset_type == MIXED && is_bare_repository())
@@ -474,7 +475,7 @@ int cmd_reset(int argc, const char **argv, const char *prefix)
 				goto cleanup;
 			}
 			the_repository->index->updated_skipworktree = 1;
-			if (!no_refresh && get_git_work_tree()) {
+			if (!no_refresh && repo_get_work_tree(the_repository)) {
 				uint64_t t_begin, t_delta_in_ms;
 
 				t_begin = getnanotime();

builtin/rev-parse.c

@@ -967,7 +967,7 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 				continue;
 			}
 			if (!strcmp(arg, "--show-toplevel")) {
-				const char *work_tree = get_git_work_tree();
+				const char *work_tree = repo_get_work_tree(the_repository);
 				if (work_tree)
 					print_path(work_tree, prefix, format, DEFAULT_UNMODIFIED);
 				else
@@ -992,7 +992,7 @@ int cmd_rev_parse(int argc, const char **argv, const char *prefix)
 				const char *pfx = prefix;
 				if (!is_inside_work_tree()) {
 					const char *work_tree =
-						get_git_work_tree();
+						repo_get_work_tree(the_repository);
 					if (work_tree)
 						printf("%s\n", work_tree);
 					continue;

builtin/stash.c

@@ -641,7 +641,7 @@ restore_untracked:
 		cp.git_cmd = 1;
 		cp.dir = prefix;
 		strvec_pushf(&cp.env, GIT_WORK_TREE_ENVIRONMENT"=%s",
-			     absolute_path(get_git_work_tree()));
+			     absolute_path(repo_get_work_tree(the_repository)));
 		strvec_pushf(&cp.env, GIT_DIR_ENVIRONMENT"=%s",
 			     absolute_path(repo_get_git_dir(the_repository)));
 		strvec_push(&cp.args, "status");

builtin/submodule--helper.c

@@ -1709,7 +1709,7 @@ static int clone_submodule(const struct module_clone_data *clone_data,
 		exit(128);
 
 	if (!is_absolute_path(clone_data->path))
-		clone_data_path = to_free = xstrfmt("%s/%s", get_git_work_tree(),
+		clone_data_path = to_free = xstrfmt("%s/%s", repo_get_work_tree(the_repository),
 						    clone_data->path);
 
 	if (validate_submodule_git_dir(sm_gitdir, clone_data->name) < 0)

builtin/update-index.c

@@ -1194,7 +1194,7 @@ int cmd_update_index(int argc, const char **argv, const char *prefix)
 				  "remove or change it, if you really want to "
 				  "enable the untracked cache"));
 		add_untracked_cache(the_repository->index);
-		report(_("Untracked cache enabled for '%s'"), get_git_work_tree());
+		report(_("Untracked cache enabled for '%s'"), repo_get_work_tree(the_repository));
 		break;
 	default:
 		BUG("bad untracked_cache value: %d", untracked_cache);

dir.c

@@ -20,6 +20,7 @@
 #include "object-store-ll.h"
 #include "path.h"
 #include "refs.h"
+#include "repository.h"
 #include "wildmatch.h"
 #include "pathspec.h"
 #include "utf8.h"
@@ -2838,7 +2839,7 @@ static const char *get_ident_string(void)
 		return sb.buf;
 	if (uname(&uts) < 0)
 		die_errno(_("failed to get kernel name and information"));
-	strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),
+	strbuf_addf(&sb, "Location %s, system %s", repo_get_work_tree(the_repository),
 		    uts.sysname);
 	return sb.buf;
 }

environment.c

@@ -219,7 +219,7 @@ void setup_git_env(const char *git_dir)
 int is_bare_repository(void)
 {
 	/* if core.bare is not 'false', let's see if there is a work tree */
-	return is_bare_repository_cfg && !get_git_work_tree();
+	return is_bare_repository_cfg && !repo_get_work_tree(the_repository);
 }
 
 int have_git_dir(void)
@@ -268,11 +268,6 @@ void set_git_work_tree(const char *new_work_tree)
 	repo_set_worktree(the_repository, new_work_tree);
 }
 
-const char *get_git_work_tree(void)
-{
-	return the_repository->worktree;
-}
-
 int odb_mkstemp(struct strbuf *temp_filename, const char *pattern)
 {
 	int fd;

environment.h

@@ -108,7 +108,6 @@ extern char *git_work_tree_cfg;
 void set_git_dir(const char *path, int make_realpath);
 const char *get_git_namespace(void);
 const char *strip_namespace(const char *namespaced_ref);
-const char *get_git_work_tree(void);
 void set_git_work_tree(const char *tree);
 
 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"

fsmonitor.c

@@ -8,6 +8,7 @@
 #include "fsmonitor.h"
 #include "fsmonitor-ipc.h"
 #include "name-hash.h"
+#include "repository.h"
 #include "run-command.h"
 #include "strbuf.h"
 #include "trace2.h"
@@ -169,7 +170,7 @@ static int query_fsmonitor_hook(struct repository *r,
 	strvec_pushf(&cp.args, "%d", version);
 	strvec_pushf(&cp.args, "%s", last_update);
 	cp.use_shell = 1;
-	cp.dir = get_git_work_tree();
+	cp.dir = repo_get_work_tree(the_repository);
 
 	trace2_region_enter("fsm_hook", "query", NULL);
 

pathspec.c

@@ -495,7 +495,7 @@ static void init_pathspec_item(struct pathspec_item *item, unsigned flags,
 			if (!have_git_dir())
 				die(_("'%s' is outside the directory tree"),
 				    copyfrom);
-			hint_path = get_git_work_tree();
+			hint_path = repo_get_work_tree(the_repository);
 			if (!hint_path)
 				hint_path = repo_get_git_dir(the_repository);
 			die(_("%s: '%s' is outside repository at '%s'"), elt,

repository.c

@@ -126,6 +126,11 @@ const char *repo_get_graft_file(struct repository *repo)
 	return repo->graft_file;
 }
 
+const char *repo_get_work_tree(struct repository *repo)
+{
+	return repo->worktree;
+}
+
 static void repo_set_commondir(struct repository *repo,
 			       const char *commondir)
 {

repository.h

@@ -211,6 +211,7 @@ 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);
+const char *repo_get_work_tree(struct repository *repo);
 
 /*
  * Define a custom repository layout. Any field can be NULL, which

setup.c

@@ -51,7 +51,7 @@ static int abspath_part_inside_repo(char *path)
 	size_t wtlen;
 	char *path0;
 	int off;
-	const char *work_tree = precompose_string_if_needed(get_git_work_tree());
+	const char *work_tree = precompose_string_if_needed(repo_get_work_tree(the_repository));
 	struct strbuf realpath = STRBUF_INIT;
 
 	if (!work_tree)
@@ -147,7 +147,7 @@ char *prefix_path(const char *prefix, int len, const char *path)
 {
 	char *r = prefix_path_gently(prefix, len, NULL, path);
 	if (!r) {
-		const char *hint_path = get_git_work_tree();
+		const char *hint_path = repo_get_work_tree(the_repository);
 		if (!hint_path)
 			hint_path = repo_get_git_dir(the_repository);
 		die(_("'%s' is outside repository at '%s'"), path,
@@ -475,7 +475,7 @@ int is_inside_git_dir(void)
 int is_inside_work_tree(void)
 {
 	if (inside_work_tree < 0)
-		inside_work_tree = is_inside_dir(get_git_work_tree());
+		inside_work_tree = is_inside_dir(repo_get_work_tree(the_repository));
 	return inside_work_tree;
 }
 
@@ -490,7 +490,7 @@ void setup_work_tree(void)
 	if (work_tree_config_is_bogus)
 		die(_("unable to set up work tree using invalid config"));
 
-	work_tree = get_git_work_tree();
+	work_tree = repo_get_work_tree(the_repository);
 	if (!work_tree || chdir_notify(work_tree))
 		die(_("this operation must be run in a work tree"));
 
@@ -547,7 +547,7 @@ static void setup_original_cwd(void)
 	 * Get our worktree; we only protect the current working directory
 	 * if it's in the worktree.
 	 */
-	worktree = get_git_work_tree();
+	worktree = repo_get_work_tree(the_repository);
 	if (!worktree)
 		goto no_prevention_needed;
 
@@ -1062,9 +1062,9 @@ static const char *setup_explicit_git_dir(const char *gitdirenv,
 		set_git_work_tree(".");
 
 	/* set_git_work_tree() must have been called by now */
-	worktree = get_git_work_tree();
+	worktree = repo_get_work_tree(the_repository);
 
-	/* both get_git_work_tree() and cwd are already normalized */
+	/* both repo_get_work_tree() and cwd are already normalized */
 	if (!strcmp(cwd->buf, worktree)) { /* cwd == worktree */
 		set_git_dir(gitdirenv, 0);
 		free(gitfile);
@@ -2192,7 +2192,7 @@ static int create_default_files(const char *template_path,
 	char *path;
 	int reinit;
 	int filemode;
-	const char *work_tree = get_git_work_tree();
+	const char *work_tree = repo_get_work_tree(the_repository);
 
 	/*
 	 * First copy the templates -- we might have the default

trace.c

@@ -25,7 +25,6 @@
 
 #include "git-compat-util.h"
 #include "abspath.h"
-#include "environment.h"
 #include "repository.h"
 #include "quote.h"
 #include "setup.h"
@@ -308,7 +307,7 @@ void trace_repo_setup(void)
 
 	cwd = xgetcwd();
 
-	if (!(git_work_tree = get_git_work_tree()))
+	if (!(git_work_tree = repo_get_work_tree(the_repository)))
 		git_work_tree = "(null)";
 
 	if (!startup_info->prefix)