Merge branch 'nd/no-the-index'

The more library-ish parts of the codebase learned to work on the
in-core index-state instance that is passed in by their callers,
instead of always working on the singleton "the_index" instance.

* nd/no-the-index: (24 commits)
  blame.c: remove implicit dependency on the_index
  apply.c: remove implicit dependency on the_index
  apply.c: make init_apply_state() take a struct repository
  apply.c: pass struct apply_state to more functions
  resolve-undo.c: use the right index instead of the_index
  archive-*.c: use the right repository
  archive.c: avoid access to the_index
  grep: use the right index instead of the_index
  attr: remove index from git_attr_set_direction()
  entry.c: use the right index instead of the_index
  submodule.c: use the right index instead of the_index
  pathspec.c: use the right index instead of the_index
  unpack-trees: avoid the_index in verify_absent()
  unpack-trees: convert clear_ce_flags* to avoid the_index
  unpack-trees: don't shadow global var the_index
  unpack-trees: add a note about path invalidation
  unpack-trees: remove 'extern' on function declaration
  ls-files: correct index argument to get_convert_attr_ascii()
  preload-index.c: use the right index instead of the_index
  dir.c: remove an implicit dependency on the_index in pathspec code
  ...

apply.c

@@ -76,10 +76,12 @@ static int parse_ignorewhitespace_option(struct apply_state *state,
 }
 int init_apply_state(struct apply_state *state,
+		     struct repository *repo,
 		     const char *prefix)
 {
 	memset(state, 0, sizeof(*state));
 	state->prefix = prefix;
+	state->repo = repo;
 	state->apply = 1;
 	state->line_termination = '\n';
 	state->p_value = 1;
@@ -3374,14 +3376,17 @@ static struct patch *previous_patch(struct apply_state *state,
 	return previous;
 }
-static int verify_index_match(const struct cache_entry *ce, struct stat *st)
+static int verify_index_match(struct apply_state *state,
+			      const struct cache_entry *ce,
+			      struct stat *st)
 {
 	if (S_ISGITLINK(ce->ce_mode)) {
 		if (!S_ISDIR(st->st_mode))
 			return -1;
 		return 0;
 	}
-	return ce_match_stat(ce, st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE);
+	return ie_match_stat(state->repo->index, ce, st,
+			     CE_MATCH_IGNORE_VALID | CE_MATCH_IGNORE_SKIP_WORKTREE);
 }
 #define SUBMODULE_PATCH_WITHOUT_INDEX 1
@@ -3514,17 +3519,17 @@ static int load_current(struct apply_state *state,
 	if (!patch->is_new)
 		BUG("patch to %s is not a creation", patch->old_name);
-	pos = cache_name_pos(name, strlen(name));
+	pos = index_name_pos(state->repo->index, name, strlen(name));
 	if (pos < 0)
 		return error(_("%s: does not exist in index"), name);
-	ce = active_cache[pos];
+	ce = state->repo->index->cache[pos];
 	if (lstat(name, &st)) {
 		if (errno != ENOENT)
 			return error_errno("%s", name);
-		if (checkout_target(&the_index, ce, &st))
+		if (checkout_target(state->repo->index, ce, &st))
 			return -1;
 	}
-	if (verify_index_match(ce, &st))
+	if (verify_index_match(state, ce, &st))
 		return error(_("%s: does not match index"), name);
 	status = load_patch_target(state, &buf, ce, &st, patch, name, mode);
@@ -3683,18 +3688,19 @@ static int check_preimage(struct apply_state *state,
 	}
 	if (state->check_index && !previous) {
-		int pos = cache_name_pos(old_name, strlen(old_name));
+		int pos = index_name_pos(state->repo->index, old_name,
+					 strlen(old_name));
 		if (pos < 0) {
 			if (patch->is_new < 0)
 				goto is_new;
 			return error(_("%s: does not exist in index"), old_name);
 		}
-		*ce = active_cache[pos];
+		*ce = state->repo->index->cache[pos];
 		if (stat_ret < 0) {
-			if (checkout_target(&the_index, *ce, st))
+			if (checkout_target(state->repo->index, *ce, st))
 				return -1;
 		}
-		if (!state->cached && verify_index_match(*ce, st))
+		if (!state->cached && verify_index_match(state, *ce, st))
 			return error(_("%s: does not match index"), old_name);
 		if (state->cached)
 			st_mode = (*ce)->ce_mode;
@@ -3738,7 +3744,7 @@ static int check_to_create(struct apply_state *state,
 	struct stat nst;
 	if (state->check_index &&
-	    cache_name_pos(new_name, strlen(new_name)) >= 0 &&
+	    index_name_pos(state->repo->index, new_name, strlen(new_name)) >= 0 &&
 	    !ok_if_exists)
 		return EXISTS_IN_INDEX;
 	if (state->cached)
@@ -3827,7 +3833,8 @@ static int path_is_beyond_symlink_1(struct apply_state *state, struct strbuf *na
 		if (state->check_index) {
 			struct cache_entry *ce;
-			ce = cache_file_exists(name->buf, name->len, ignore_case);
+			ce = index_file_exists(state->repo->index, name->buf,
+					       name->len, ignore_case);
 			if (ce && S_ISLNK(ce->ce_mode))
 				return 1;
 		} else {
@@ -4002,9 +4009,10 @@ static int check_patch_list(struct apply_state *state, struct patch *patch)
 static int read_apply_cache(struct apply_state *state)
 {
 	if (state->index_file)
-		return read_cache_from(state->index_file);
+		return read_index_from(state->repo->index, state->index_file,
+				       get_git_dir());
 	else
-		return read_cache();
+		return read_index(state->repo->index);
 }
 /* This function tries to read the object name from the current index */
@@ -4015,10 +4023,10 @@ static int get_current_oid(struct apply_state *state, const char *path,
 	if (read_apply_cache(state) < 0)
 		return -1;
-	pos = cache_name_pos(path, strlen(path));
+	pos = index_name_pos(state->repo->index, path, strlen(path));
 	if (pos < 0)
 		return -1;
-	oidcpy(oid, &active_cache[pos]->oid);
+	oidcpy(oid, &state->repo->index->cache[pos]->oid);
 	return 0;
 }
@@ -4246,7 +4254,7 @@ static void patch_stats(struct apply_state *state, struct patch *patch)
 static int remove_file(struct apply_state *state, struct patch *patch, int rmdir_empty)
 {
 	if (state->update_index && !state->ita_only) {
-		if (remove_file_from_cache(patch->old_name) < 0)
+		if (remove_file_from_index(state->repo->index, patch->old_name) < 0)
 			return error(_("unable to remove %s from index"), patch->old_name);
 	}
 	if (!state->cached) {
@@ -4267,7 +4275,7 @@ static int add_index_file(struct apply_state *state,
 	struct cache_entry *ce;
 	int namelen = strlen(path);
-	ce = make_empty_cache_entry(&the_index, namelen);
+	ce = make_empty_cache_entry(state->repo->index, namelen);
 	memcpy(ce->name, path, namelen);
 	ce->ce_mode = create_ce_mode(mode);
 	ce->ce_flags = create_ce_flags(0);
@@ -4299,7 +4307,7 @@ static int add_index_file(struct apply_state *state,
 				       "for newly created file %s"), path);
 		}
 	}
-	if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0) {
+	if (add_index_entry(state->repo->index, ce, ADD_CACHE_OK_TO_ADD) < 0) {
 		discard_cache_entry(ce);
 		return error(_("unable to add cache entry for %s"), path);
 	}
@@ -4313,7 +4321,9 @@ static int add_index_file(struct apply_state *state,
  *   0 if everything went well
  *   1 if a recoverable error happened
  */
-static int try_create_file(const char *path, unsigned int mode, const char *buf, unsigned long size)
+static int try_create_file(struct apply_state *state, const char *path,
+			   unsigned int mode, const char *buf,
+			   unsigned long size)
 {
 	int fd, res;
 	struct strbuf nbuf = STRBUF_INIT;
@@ -4335,7 +4345,7 @@ static int try_create_file(const char *path, unsigned int mode, const char *buf,
 	if (fd < 0)
 		return 1;
-	if (convert_to_working_tree(path, buf, size, &nbuf)) {
+	if (convert_to_working_tree(state->repo->index, path, buf, size, &nbuf)) {
 		size = nbuf.len;
 		buf  = nbuf.buf;
 	}
@@ -4371,7 +4381,7 @@ static int create_one_file(struct apply_state *state,
 	if (state->cached)
 		return 0;
-	res = try_create_file(path, mode, buf, size);
+	res = try_create_file(state, path, mode, buf, size);
 	if (res < 0)
 		return -1;
 	if (!res)
@@ -4380,7 +4390,7 @@ static int create_one_file(struct apply_state *state,
 	if (errno == ENOENT) {
 		if (safe_create_leading_directories(path))
 			return 0;
-		res = try_create_file(path, mode, buf, size);
+		res = try_create_file(state, path, mode, buf, size);
 		if (res < 0)
 			return -1;
 		if (!res)
@@ -4402,7 +4412,7 @@ static int create_one_file(struct apply_state *state,
 		for (;;) {
 			char newpath[PATH_MAX];
 			mksnpath(newpath, sizeof(newpath), "%s~%u", path, nr);
-			res = try_create_file(newpath, mode, buf, size);
+			res = try_create_file(state, newpath, mode, buf, size);
 			if (res < 0)
 				return -1;
 			if (!res) {
@@ -4432,17 +4442,17 @@ static int add_conflicted_stages_file(struct apply_state *state,
 	namelen = strlen(patch->new_name);
 	mode = patch->new_mode ? patch->new_mode : (S_IFREG | 0644);
-	remove_file_from_cache(patch->new_name);
+	remove_file_from_index(state->repo->index, patch->new_name);
 	for (stage = 1; stage < 4; stage++) {
 		if (is_null_oid(&patch->threeway_stage[stage - 1]))
 			continue;
-		ce = make_empty_cache_entry(&the_index, namelen);
+		ce = make_empty_cache_entry(state->repo->index, namelen);
 		memcpy(ce->name, patch->new_name, namelen);
 		ce->ce_mode = create_ce_mode(mode);
 		ce->ce_flags = create_ce_flags(stage);
 		ce->ce_namelen = namelen;
 		oidcpy(&ce->oid, &patch->threeway_stage[stage - 1]);
-		if (add_cache_entry(ce, ADD_CACHE_OK_TO_ADD) < 0) {
+		if (add_index_entry(state->repo->index, ce, ADD_CACHE_OK_TO_ADD) < 0) {
 			discard_cache_entry(ce);
 			return error(_("unable to add cache entry for %s"),
 				     patch->new_name);
@@ -4891,7 +4901,7 @@ int apply_all_patches(struct apply_state *state,
 	}
 	if (state->update_index) {
-		res = write_locked_index(&the_index, &state->lock_file, COMMIT_LOCK);
+		res = write_locked_index(state->repo->index, &state->lock_file, COMMIT_LOCK);
 		if (res) {
 			error(_("Unable to write new index file"));
 			res = -128;

apply.h

 #ifndef APPLY_H
 #define APPLY_H
+struct repository;
+
 enum apply_ws_error_action {
 	nowarn_ws_error,
 	warn_on_ws_error,
@@ -62,6 +64,7 @@ struct apply_state {
 	int unsafe_paths;
 	/* Other non boolean parameters */
+	struct repository *repo;
 	const char *index_file;
 	enum apply_verbosity apply_verbosity;
 	const char *fake_ancestor;
@@ -116,6 +119,7 @@ int apply_parse_options(int argc, const char **argv,
 			int *force_apply, int *options,
 			const char * const *apply_usage);
 int init_apply_state(struct apply_state *state,
+		     struct repository *repo,
 		     const char *prefix);
 void clear_apply_state(struct apply_state *state);
 int check_apply_state(struct apply_state *state, int force_apply);

archive-tar.c

@@ -277,7 +277,7 @@ static int write_tar_entry(struct archiver_args *args,
 		memcpy(header.name, path, pathlen);
 	if (S_ISREG(mode) && !args->convert &&
-	    oid_object_info(the_repository, oid, &size) == OBJ_BLOB &&
+	    oid_object_info(args->repo, oid, &size) == OBJ_BLOB &&
 	    size > big_file_threshold)
 		buffer = NULL;
 	else if (S_ISLNK(mode) || S_ISREG(mode)) {

archive-zip.c

@@ -326,7 +326,7 @@ static int write_zip_entry(struct archiver_args *args,
 		compressed_size = 0;
 		buffer = NULL;
 	} else if (S_ISREG(mode) || S_ISLNK(mode)) {
-		enum object_type type = oid_object_info(the_repository, oid,
+		enum object_type type = oid_object_info(args->repo, oid,
 							&size);
 		method = 0;

archive.c

@@ -79,7 +79,7 @@ void *object_file_to_archive(const struct archiver_args *args,
 		size_t size = 0;
 		strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
-		convert_to_working_tree(path, buf.buf, buf.len, &buf);
+		convert_to_working_tree(args->repo->index, path, buf.buf, buf.len, &buf);
 		if (commit)
 			format_subst(commit, buf.buf, buf.len, &buf);
 		buffer = strbuf_detach(&buf, &size);
@@ -104,12 +104,13 @@ struct archiver_context {
 	struct directory *bottom;
 };
-static const struct attr_check *get_archive_attrs(const char *path)
+static const struct attr_check *get_archive_attrs(struct index_state *istate,
+						  const char *path)
 {
 	static struct attr_check *check;
 	if (!check)
 		check = attr_check_initl("export-ignore", "export-subst", NULL);
-	return git_check_attr(path, check) ? NULL : check;
+	return git_check_attr(istate, path, check) ? NULL : check;
 }
 static int check_attr_export_ignore(const struct attr_check *check)
@@ -145,7 +146,7 @@ static int write_archive_entry(const struct object_id *oid, const char *base,
 	if (!S_ISDIR(mode)) {
 		const struct attr_check *check;
-		check = get_archive_attrs(path_without_prefix);
+		check = get_archive_attrs(args->repo->index, path_without_prefix);
 		if (check_attr_export_ignore(check))
 			return 0;
 		args->convert = check_attr_export_subst(check);
@@ -220,7 +221,7 @@ static int queue_or_write_archive_entry(const struct object_id *oid,
 		/* Borrow base, but restore its original value when done. */
 		strbuf_addstr(base, filename);
 		strbuf_addch(base, '/');
-		check = get_archive_attrs(base->buf);
+		check = get_archive_attrs(c->args->repo->index, base->buf);
 		strbuf_setlen(base, baselen);
 		if (check_attr_export_ignore(check))
@@ -268,13 +269,13 @@ int write_archive_entries(struct archiver_args *args,
 		memset(&opts, 0, sizeof(opts));
 		opts.index_only = 1;
 		opts.head_idx = -1;
-		opts.src_index = &the_index;
-		opts.dst_index = &the_index;
+		opts.src_index = args->repo->index;
+		opts.dst_index = args->repo->index;
 		opts.fn = oneway_merge;
 		init_tree_desc(&t, args->tree->buffer, args->tree->size);
 		if (unpack_trees(1, &t, &opts))
 			return -1;
-		git_attr_set_direction(GIT_ATTR_INDEX, &the_index);
+		git_attr_set_direction(GIT_ATTR_INDEX);
 	}
 	err = read_tree_recursive(args->tree, "", 0, 0, &args->pathspec,
@@ -304,33 +305,43 @@ static const struct archiver *lookup_archiver(const char *name)
 	return NULL;
 }
+struct path_exists_context {
+	struct pathspec pathspec;
+	struct archiver_args *args;
+};
+
 static int reject_entry(const struct object_id *oid, struct strbuf *base,
 			const char *filename, unsigned mode,
 			int stage, void *context)
 {
 	int ret = -1;
+	struct path_exists_context *ctx = context;
+
 	if (S_ISDIR(mode)) {
 		struct strbuf sb = STRBUF_INIT;
 		strbuf_addbuf(&sb, base);
 		strbuf_addstr(&sb, filename);
-		if (!match_pathspec(context, sb.buf, sb.len, 0, NULL, 1))
+		if (!match_pathspec(ctx->args->repo->index,
+				    &ctx->pathspec,
+				    sb.buf, sb.len, 0, NULL, 1))
 			ret = READ_TREE_RECURSIVE;
 		strbuf_release(&sb);
 	}
 	return ret;
 }
-static int path_exists(struct tree *tree, const char *path)
+static int path_exists(struct archiver_args *args, const char *path)
 {
 	const char *paths[] = { path, NULL };
-	struct pathspec pathspec;
+	struct path_exists_context ctx;
 	int ret;
-	parse_pathspec(&pathspec, 0, 0, "", paths);
-	pathspec.recursive = 1;
-	ret = read_tree_recursive(tree, "", 0, 0, &pathspec,
-				  reject_entry, &pathspec);
-	clear_pathspec(&pathspec);
+	ctx.args = args;
+	parse_pathspec(&ctx.pathspec, 0, 0, "", paths);
+	ctx.pathspec.recursive = 1;
+	ret = read_tree_recursive(args->tree, "", 0, 0, &ctx.pathspec,
+				  reject_entry, &ctx);
+	clear_pathspec(&ctx.pathspec);
 	return ret != 0;
 }
@@ -348,7 +359,7 @@ static void parse_pathspec_arg(const char **pathspec,
 	ar_args->pathspec.recursive = 1;
 	if (pathspec) {
 		while (*pathspec) {
-			if (**pathspec && !path_exists(ar_args->tree, *pathspec))
+			if (**pathspec && !path_exists(ar_args, *pathspec))
 				die(_("pathspec '%s' did not match any files"), *pathspec);
 			pathspec++;
 		}
@@ -510,6 +521,7 @@ static int parse_archive_args(int argc, const char **argv,
 }
 int write_archive(int argc, const char **argv, const char *prefix,
+		  struct repository *repo,
 		  const char *name_hint, int remote)
 {
 	const struct archiver *ar = NULL;
@@ -521,6 +533,7 @@ int write_archive(int argc, const char **argv, const char *prefix,
 	init_tar_archiver();
 	init_zip_archiver();
+	args.repo = repo;
 	argc = parse_archive_args(argc, argv, &ar, &args, name_hint, remote);
 	if (!startup_info->have_repository) {
 		/*

archive.h

@@ -3,7 +3,10 @@
 #include "pathspec.h"
+struct repository;
+
 struct archiver_args {
+	struct repository *repo;
 	const char *base;
 	size_t baselen;
 	struct tree *tree;
@@ -17,6 +20,16 @@ struct archiver_args {
 	int compression_level;
 };
+/* main api */
+
+extern int write_archive(int argc, const char **argv, const char *prefix,
+			 struct repository *repo,
+			 const char *name_hint, int remote);
+
+const char *archive_format_from_filename(const char *filename);
+
+/* archive backend stuff */
+
 #define ARCHIVER_WANT_COMPRESSION_LEVELS 1
 #define ARCHIVER_REMOTE 2
 struct archiver {
@@ -36,9 +49,6 @@ typedef int (*write_archive_entry_fn_t)(struct archiver_args *args,
 					unsigned int mode);
 extern int write_archive_entries(struct archiver_args *args, write_archive_entry_fn_t write_entry);
-extern int write_archive(int argc, const char **argv, const char *prefix, const char *name_hint, int remote);
-
-const char *archive_format_from_filename(const char *filename);
 extern void *object_file_to_archive(const struct archiver_args *args,
 				    const char *path, const struct object_id *oid,
 				    unsigned int mode, enum object_type *type,

attr.c

@@ -708,10 +708,8 @@ static struct attr_stack *read_attr_from_array(const char **list)
  * another thread could potentially be calling into the attribute system.
  */
 static enum git_attr_direction direction;
-static struct index_state *use_index;
-void git_attr_set_direction(enum git_attr_direction new_direction,
-			    struct index_state *istate)
+void git_attr_set_direction(enum git_attr_direction new_direction)
 {
 	if (is_bare_repository() && new_direction != GIT_ATTR_INDEX)
 		BUG("non-INDEX attr direction in a bare repo");
@@ -720,7 +718,6 @@ void git_attr_set_direction(enum git_attr_direction new_direction,
 		drop_all_attr_stacks();
 	direction = new_direction;
-	use_index = istate;
 }
 static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
@@ -743,13 +740,18 @@ static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
 	return res;
 }
-static struct attr_stack *read_attr_from_index(const char *path, int macro_ok)
+static struct attr_stack *read_attr_from_index(const struct index_state *istate,
+					       const char *path,
+					       int macro_ok)
 {
 	struct attr_stack *res;
 	char *buf, *sp;
 	int lineno = 0;
-	buf = read_blob_data_from_index(use_index ? use_index : &the_index, path, NULL);
+	if (!istate)
+		return NULL;
+
+	buf = read_blob_data_from_index(istate, path, NULL);
 	if (!buf)
 		return NULL;
@@ -768,15 +770,16 @@ static struct attr_stack *read_attr_from_index(const char *path, int macro_ok)
 	return res;
 }
-static struct attr_stack *read_attr(const char *path, int macro_ok)
+static struct attr_stack *read_attr(const struct index_state *istate,
+				    const char *path, int macro_ok)
 {
 	struct attr_stack *res = NULL;
 	if (direction == GIT_ATTR_INDEX) {
-		res = read_attr_from_index(path, macro_ok);
+		res = read_attr_from_index(istate, path, macro_ok);
 	} else if (!is_bare_repository()) {
 		if (direction == GIT_ATTR_CHECKOUT) {
-			res = read_attr_from_index(path, macro_ok);
+			res = read_attr_from_index(istate, path, macro_ok);
 			if (!res)
 				res = read_attr_from_file(path, macro_ok);
 		} else if (direction == GIT_ATTR_CHECKIN) {
@@ -788,7 +791,7 @@ static struct attr_stack *read_attr(const char *path, int macro_ok)
 				 * We allow operation in a sparsely checked out
 				 * work tree, so read from it.
 				 */
-				res = read_attr_from_index(path, macro_ok);
+				res = read_attr_from_index(istate, path, macro_ok);
 		}
 	}
@@ -859,7 +862,8 @@ static void push_stack(struct attr_stack **attr_stack_p,
 	}
 }
-static void bootstrap_attr_stack(struct attr_stack **stack)
+static void bootstrap_attr_stack(const struct index_state *istate,
+				 struct attr_stack **stack)
 {
 	struct attr_stack *e;
@@ -883,7 +887,7 @@ static void bootstrap_attr_stack(struct attr_stack **stack)
 	}
 	/* root directory */
-	e = read_attr(GITATTRIBUTES_FILE, 1);
+	e = read_attr(istate, GITATTRIBUTES_FILE, 1);
 	push_stack(stack, e, xstrdup(""), 0);
 	/* info frame */
@@ -896,7 +900,8 @@ static void bootstrap_attr_stack(struct attr_stack **stack)
 	push_stack(stack, e, NULL, 0);
 }
-static void prepare_attr_stack(const char *path, int dirlen,
+static void prepare_attr_stack(const struct index_state *istate,
+			       const char *path, int dirlen,
 			       struct attr_stack **stack)
 {
 	struct attr_stack *info;
@@ -917,7 +922,7 @@ static void prepare_attr_stack(const char *path, int dirlen,
 	 * .gitattributes in deeper directories to shallower ones,
 	 * and finally use the built-in set as the default.
 	 */
-	bootstrap_attr_stack(stack);
+	bootstrap_attr_stack(istate, stack);
 	/*
 	 * Pop the "info" one that is always at the top of the stack.
@@ -973,7 +978,7 @@ static void prepare_attr_stack(const char *path, int dirlen,
 		strbuf_add(&pathbuf, path + pathbuf.len, (len - pathbuf.len));
 		strbuf_addf(&pathbuf, "/%s", GITATTRIBUTES_FILE);
-		next = read_attr(pathbuf.buf, 0);
+		next = read_attr(istate, pathbuf.buf, 0);
 		/* reset the pathbuf to not include "/.gitattributes" */
 		strbuf_setlen(&pathbuf, len);
@@ -1095,7 +1100,9 @@ static void determine_macros(struct all_attrs_item *all_attrs,
  * If check->check_nr is non-zero, only attributes in check[] are collected.
  * Otherwise all attributes are collected.
  */
-static void collect_some_attrs(const char *path, struct attr_check *check)
+static void collect_some_attrs(const struct index_state *istate,
+			       const char *path,
+			       struct attr_check *check)
 {
 	int i, pathlen, rem, dirlen;
 	const char *cp, *last_slash = NULL;
@@ -1114,7 +1121,7 @@ static void collect_some_attrs(const char *path, struct attr_check *check)
 		dirlen = 0;
 	}
-	prepare_attr_stack(path, dirlen, &check->stack);
+	prepare_attr_stack(istate, path, dirlen, &check->stack);
 	all_attrs_init(&g_attr_hashmap, check);
 	determine_macros(check->all_attrs, check->stack);
@@ -1136,11 +1143,13 @@ static void collect_some_attrs(const char *path, struct attr_check *check)
 	fill(path, pathlen, basename_offset, check->stack, check->all_attrs, rem);
 }
-int git_check_attr(const char *path, struct attr_check *check)
+int git_check_attr(const struct index_state *istate,
+		   const char *path,
+		   struct attr_check *check)
 {
 	int i;
-	collect_some_attrs(path, check);
+	collect_some_attrs(istate, path, check);
 	for (i = 0; i < check->nr; i++) {
 		size_t n = check->items[i].attr->attr_nr;
@@ -1153,12 +1162,13 @@ int git_check_attr(const char *path, struct attr_check *check)
 	return 0;
 }
-void git_all_attrs(const char *path, struct attr_check *check)
+void git_all_attrs(const struct index_state *istate,
+		   const char *path, struct attr_check *check)
 {
 	int i;
 	attr_check_reset(check);
-	collect_some_attrs(path, check);
+	collect_some_attrs(istate, path, check);
 	for (i = 0; i < check->all_attrs_nr; i++) {
 		const char *name = check->all_attrs[i].attr->name;

attr.h

 #ifndef ATTR_H
 #define ATTR_H
+struct index_state;
+
 /* An attribute is a pointer to this opaque structure */
 struct git_attr;
@@ -60,21 +62,22 @@ void attr_check_free(struct attr_check *check);
  */
 const char *git_attr_name(const struct git_attr *);
-int git_check_attr(const char *path, struct attr_check *check);
+int git_check_attr(const struct index_state *istate,
+		   const char *path, struct attr_check *check);
 /*
  * Retrieve all attributes that apply to the specified path.
  * check holds the attributes and their values.
  */
-void git_all_attrs(const char *path, struct attr_check *check);
+void git_all_attrs(const struct index_state *istate,
+		   const char *path, struct attr_check *check);
 enum git_attr_direction {
 	GIT_ATTR_CHECKIN,
 	GIT_ATTR_CHECKOUT,
 	GIT_ATTR_INDEX
 };
-void git_attr_set_direction(enum git_attr_direction new_direction,
-			    struct index_state *istate);
+void git_attr_set_direction(enum git_attr_direction new_direction);
 void attr_start(void);

blame.c

@@ -90,7 +90,8 @@ static struct blame_origin *get_origin(struct commit *commit, const char *path)
-static void verify_working_tree_path(struct commit *work_tree, const char *path)
+static void verify_working_tree_path(struct repository *repo,
+				     struct commit *work_tree, const char *path)
 {
 	struct commit_list *parents;
 	int pos;
@@ -101,15 +102,15 @@ static void verify_working_tree_path(struct commit *work_tree, const char *path)
 		unsigned mode;
 		if (!get_tree_entry(commit_oid, path, &blob_oid, &mode) &&
-		    oid_object_info(the_repository, &blob_oid, NULL) == OBJ_BLOB)
+		    oid_object_info(repo, &blob_oid, NULL) == OBJ_BLOB)
 			return;
 	}
-	pos = cache_name_pos(path, strlen(path));
+	pos = index_name_pos(repo->index, path, strlen(path));
 	if (pos >= 0)
 		; /* path is in the index */
-	else if (-1 - pos < active_nr &&
-		 !strcmp(active_cache[-1 - pos]->name, path))
+	else if (-1 - pos < repo->index->cache_nr &&
+		 !strcmp(repo->index->cache[-1 - pos]->name, path))
 		; /* path is in the index, unmerged */
 	else
 		die("no such path '%s' in HEAD", path);
@@ -165,7 +166,8 @@ static void set_commit_buffer_from_strbuf(struct commit *c, struct strbuf *sb)
  * Prepare a dummy commit that represents the work tree (or staged) item.
  * Note that annotating work tree item never works in the reverse.
  */
-static struct commit *fake_working_tree_commit(struct diff_options *opt,
+static struct commit *fake_working_tree_commit(struct repository *repo,
+					       struct diff_options *opt,
 					       const char *path,
 					       const char *contents_from)
 {
@@ -181,7 +183,7 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
 	unsigned mode;
 	struct strbuf msg = STRBUF_INIT;
-	read_cache();
+	read_index(repo->index);
 	time(&now);
 	commit = alloc_commit_node(the_repository);
 	commit->object.parsed = 1;
@@ -193,7 +195,7 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
 	parent_tail = append_parent(parent_tail, &head_oid);
 	append_merge_parents(parent_tail);
-	verify_working_tree_path(commit, path);
+	verify_working_tree_path(repo, commit, path);
 	origin = make_origin(commit, path);
@@ -251,7 +253,7 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
 		if (strbuf_read(&buf, 0, 0) < 0)
 			die_errno("failed to read from stdin");
 	}
-	convert_to_git(&the_index, path, buf.buf, buf.len, &buf, 0);
+	convert_to_git(repo->index, path, buf.buf, buf.len, &buf, 0);
 	origin->file.ptr = buf.buf;
 	origin->file.size = buf.len;
 	pretend_object_file(buf.buf, buf.len, OBJ_BLOB, &origin->blob_oid);
@@ -262,27 +264,28 @@ static struct commit *fake_working_tree_commit(struct diff_options *opt,
 	 * bits; we are not going to write this index out -- we just
 	 * want to run "diff-index --cached".
 	 */
-	discard_cache();
-	read_cache();
+	discard_index(repo->index);
+	read_index(repo->index);
 	len = strlen(path);
 	if (!mode) {
-		int pos = cache_name_pos(path, len);
+		int pos = index_name_pos(repo->index, path, len);
 		if (0 <= pos)
-			mode = active_cache[pos]->ce_mode;
+			mode = repo->index->cache[pos]->ce_mode;
 		else
 			/* Let's not bother reading from HEAD tree */
 			mode = S_IFREG | 0644;
 	}
-	ce = make_empty_cache_entry(&the_index, len);
+	ce = make_empty_cache_entry(repo->index, len);
 	oidcpy(&ce->oid, &origin->blob_oid);
 	memcpy(ce->name, path, len);
 	ce->ce_flags = create_ce_flags(0);
 	ce->ce_namelen = len;
 	ce->ce_mode = create_ce_mode(mode);
-	add_cache_entry(ce, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE);
-	cache_tree_invalidate_path(&the_index, path);
+	add_index_entry(repo->index, ce,
+			ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE);
+	cache_tree_invalidate_path(repo->index, path);
 	return commit;
 }
@@ -519,13 +522,14 @@ static void queue_blames(struct blame_scoreboard *sb, struct blame_origin *porig
  *
  * This also fills origin->mode for corresponding tree path.
  */
-static int fill_blob_sha1_and_mode(struct blame_origin *origin)
+static int fill_blob_sha1_and_mode(struct repository *repo,
+				   struct blame_origin *origin)
 {
 	if (!is_null_oid(&origin->blob_oid))
 		return 0;
 	if (get_tree_entry(&origin->commit->object.oid, origin->path, &origin->blob_oid, &origin->mode))
 		goto error_out;
-	if (oid_object_info(the_repository, &origin->blob_oid, NULL) != OBJ_BLOB)
+	if (oid_object_info(repo, &origin->blob_oid, NULL) != OBJ_BLOB)
 		goto error_out;
 	return 0;
  error_out:
@@ -1767,7 +1771,9 @@ void init_scoreboard(struct blame_scoreboard *sb)
 	sb->copy_score = BLAME_DEFAULT_COPY_SCORE;
 }
-void setup_scoreboard(struct blame_scoreboard *sb, const char *path, struct blame_origin **orig)
+void setup_scoreboard(struct blame_scoreboard *sb,
+		      const char *path,
+		      struct blame_origin **orig)
 {
 	const char *final_commit_name = NULL;
 	struct blame_origin *o;
@@ -1779,6 +1785,9 @@ void setup_scoreboard(struct blame_scoreboard *sb, const char *path, struct blam
 	if (sb->reverse && sb->contents_from)
 		die(_("--contents and --reverse do not blend well."));
+	if (!sb->repo)
+		BUG("repo is NULL");
+
 	if (!sb->reverse) {
 		sb->final = find_single_final(sb->revs, &final_commit_name);
 		sb->commits.compare = compare_commits_by_commit_date;
@@ -1800,7 +1809,8 @@ void setup_scoreboard(struct blame_scoreboard *sb, const char *path, struct blam
 		 * or "--contents".
 		 */
 		setup_work_tree();
-		sb->final = fake_working_tree_commit(&sb->revs->diffopt,
+		sb->final = fake_working_tree_commit(sb->repo,
+						     &sb->revs->diffopt,
 						     path, sb->contents_from);
 		add_pending_object(sb->revs, &(sb->final->object), ":");
 	}
@@ -1845,7 +1855,7 @@ void setup_scoreboard(struct blame_scoreboard *sb, const char *path, struct blam
 	}
 	else {
 		o = get_origin(sb->final, path);
-		if (fill_blob_sha1_and_mode(o))
+		if (fill_blob_sha1_and_mode(sb->repo, o))
 			die(_("no such path %s in %s"), path, final_commit_name);
 		if (sb->revs->diffopt.flags.allow_textconv &&

blame.h

@@ -102,6 +102,7 @@ struct blame_scoreboard {
 	struct commit *final;
 	/* Priority queue for commits with unassigned blame records */
 	struct prio_queue commits;
+	struct repository *repo;
 	struct rev_info *revs;
 	const char *path;

builtin/add.c

@@ -40,7 +40,7 @@ static void chmod_pathspec(struct pathspec *pathspec, char flip)
 	for (i = 0; i < active_nr; i++) {
 		struct cache_entry *ce = active_cache[i];
-		if (pathspec && !ce_path_match(ce, pathspec, NULL))
+		if (pathspec && !ce_path_match(&the_index, ce, pathspec, NULL))
 			continue;
 		if (chmod_cache_entry(ce, flip) < 0)
@@ -135,7 +135,7 @@ static int renormalize_tracked_files(const struct pathspec *pathspec, int flags)
 			continue; /* do not touch unmerged paths */
 		if (!S_ISREG(ce->ce_mode) && !S_ISLNK(ce->ce_mode))
 			continue; /* do not touch non blobs */
-		if (pathspec && !ce_path_match(ce, pathspec, NULL))
+		if (pathspec && !ce_path_match(&the_index, ce, pathspec, NULL))
 			continue;
 		retval |= add_file_to_cache(ce->name, flags | HASH_RENORMALIZE);
 	}
@@ -155,7 +155,7 @@ static char *prune_directory(struct dir_struct *dir, struct pathspec *pathspec,
 	i = dir->nr;
 	while (--i >= 0) {
 		struct dir_entry *entry = *src++;
-		if (dir_path_match(entry, pathspec, prefix, seen))
+		if (dir_path_match(&the_index, entry, pathspec, prefix, seen))
 			*dst++ = entry;
 	}
 	dir->nr = dst - dir->entries;

builtin/am.c

@@ -1464,7 +1464,7 @@ static int run_apply(const struct am_state *state, const char *index_file)
 	int force_apply = 0;
 	int options = 0;
-	if (init_apply_state(&apply_state, NULL))
+	if (init_apply_state(&apply_state, the_repository, NULL))
 		BUG("init_apply_state() failed");
 	argv_array_push(&apply_opts, "apply");

builtin/apply.c

@@ -16,7 +16,7 @@ int cmd_apply(int argc, const char **argv, const char *prefix)
 	int ret;
 	struct apply_state state;
-	if (init_apply_state(&state, prefix))
+	if (init_apply_state(&state, the_repository, prefix))
 		exit(128);
 	argc = apply_parse_options(argc, argv,

builtin/archive.c

@@ -105,5 +105,5 @@ int cmd_archive(int argc, const char **argv, const char *prefix)
 	setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
-	return write_archive(argc, argv, prefix, output, 0);
+	return write_archive(argc, argv, prefix, the_repository, output, 0);
 }

builtin/blame.c

@@ -988,6 +988,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 	sb.revs = &revs;
 	sb.contents_from = contents_from;
 	sb.reverse = reverse;
+	sb.repo = the_repository;
 	setup_scoreboard(&sb, path, &o);
 	lno = sb.num_lines;

builtin/cat-file.c

@@ -40,7 +40,7 @@ static int filter_object(const char *path, unsigned mode,
 			     oid_to_hex(oid), path);
 	if ((type == OBJ_BLOB) && S_ISREG(mode)) {
 		struct strbuf strbuf = STRBUF_INIT;
-		if (convert_to_working_tree(path, *buf, *size, &strbuf)) {
+		if (convert_to_working_tree(&the_index, path, *buf, *size, &strbuf)) {
 			free(*buf);
 			*size = strbuf.len;
 			*buf = strbuf_detach(&strbuf, NULL);

builtin/check-attr.c

@@ -63,9 +63,9 @@ static void check_attr(const char *prefix,
 		prefix_path(prefix, prefix ? strlen(prefix) : 0, file);
 	if (collect_all) {
-		git_all_attrs(full_path, check);
+		git_all_attrs(&the_index, full_path, check);
 	} else {
-		if (git_check_attr(full_path, check))
+		if (git_check_attr(&the_index, full_path, check))
 			die("git_check_attr died");
 	}
 	output_attr(check, file);
@@ -120,7 +120,7 @@ int cmd_check_attr(int argc, const char **argv, const char *prefix)
 	}
 	if (cached_attrs)
-		git_attr_set_direction(GIT_ATTR_INDEX, NULL);
+		git_attr_set_direction(GIT_ATTR_INDEX);
 	doubledash = -1;
 	for (i = 0; doubledash < 0 && i < argc; i++) {

builtin/checkout-index.c

@@ -190,6 +190,7 @@ int cmd_checkout_index(int argc, const char **argv, const char *prefix)
 	argc = parse_options(argc, argv, prefix, builtin_checkout_index_options,
 			builtin_checkout_index_usage, 0);
+	state.istate = &the_index;
 	state.force = force;
 	state.quiet = quiet;
 	state.not_new = not_new;

builtin/checkout.c

@@ -318,7 +318,7 @@ static int checkout_paths(const struct checkout_opts *opts,
 		 * match_pathspec() for _all_ entries when
 		 * opts->source_tree != NULL.
 		 */
-		if (ce_path_match(ce, &opts->pathspec, ps_matched))
+		if (ce_path_match(&the_index, ce, &opts->pathspec, ps_matched))
 			ce->ce_flags |= CE_MATCHED;
 	}

builtin/clean.c

@@ -976,7 +976,7 @@ int cmd_clean(int argc, const char **argv, const char *prefix)
 			continue;
 		if (pathspec.nr)
-			matches = dir_path_match(ent, &pathspec, 0, NULL);
+			matches = dir_path_match(&the_index, ent, &pathspec, 0, NULL);
 		if (pathspec.nr && !matches)
 			continue;