1 files changed, 473 insertions, 180 deletions

diff --git a/remote.c b/remote.c
index 6d1e8d0..2b650b8 100644
--- a/remote.c
+++ b/remote.c
@@ -1,19 +1,27 @@
-#include "cache.h"
+#include "git-compat-util.h"
+#include "abspath.h"
 #include "config.h"
+#include "environment.h"
+#include "gettext.h"
+#include "hex.h"
 #include "remote.h"
+#include "urlmatch.h"
 #include "refs.h"
 #include "refspec.h"
-#include "object-store.h"
+#include "object-name.h"
+#include "object-store-ll.h"
+#include "path.h"
 #include "commit.h"
 #include "diff.h"
 #include "revision.h"
 #include "dir.h"
-#include "tag.h"
+#include "setup.h"
 #include "string-list.h"
-#include "mergesort.h"
 #include "strvec.h"
 #include "commit-reach.h"
 #include "advice.h"
+#include "connect.h"
+#include "parse-options.h"
 
 enum map_direction { FROM_SRC, FROM_DST };
 
@@ -21,33 +29,6 @@ struct counted_string {
 	size_t len;
 	const char *s;
 };
-struct rewrite {
-	const char *base;
-	size_t baselen;
-	struct counted_string *instead_of;
-	int instead_of_nr;
-	int instead_of_alloc;
-};
-struct rewrites {
-	struct rewrite **rewrite;
-	int rewrite_alloc;
-	int rewrite_nr;
-};
-
-static struct remote **remotes;
-static int remotes_alloc;
-static int remotes_nr;
-static struct hashmap remotes_hash;
-
-static struct branch **branches;
-static int branches_alloc;
-static int branches_nr;
-
-static struct branch *current_branch;
-static const char *pushremote_name;
-
-static struct rewrites rewrites;
-static struct rewrites rewrites_push;
 
 static int valid_remote(const struct remote *remote)
 {
@@ -92,17 +73,19 @@ static void add_pushurl(struct remote *remote, const char *pushurl)
 	remote->pushurl[remote->pushurl_nr++] = pushurl;
 }
 
-static void add_pushurl_alias(struct remote *remote, const char *url)
+static void add_pushurl_alias(struct remote_state *remote_state,
+			      struct remote *remote, const char *url)
 {
-	const char *pushurl = alias_url(url, &rewrites_push);
+	const char *pushurl = alias_url(url, &remote_state->rewrites_push);
 	if (pushurl != url)
 		add_pushurl(remote, pushurl);
 }
 
-static void add_url_alias(struct remote *remote, const char *url)
+static void add_url_alias(struct remote_state *remote_state,
+			  struct remote *remote, const char *url)
 {
-	add_url(remote, alias_url(url, &rewrites));
-	add_pushurl_alias(remote, url);
+	add_url(remote, alias_url(url, &remote_state->rewrites));
+	add_pushurl_alias(remote_state, remote, url);
 }
 
 struct remotes_hash_key {
@@ -110,7 +93,7 @@ struct remotes_hash_key {
 	int len;
 };
 
-static int remotes_hash_cmp(const void *unused_cmp_data,
+static int remotes_hash_cmp(const void *cmp_data UNUSED,
 			    const struct hashmap_entry *eptr,
 			    const struct hashmap_entry *entry_or_key,
 			    const void *keydata)
@@ -122,32 +105,26 @@ static int remotes_hash_cmp(const void *unused_cmp_data,
 	b = container_of(entry_or_key, const struct remote, ent);
 
 	if (key)
-		return strncmp(a->name, key->str, key->len) || a->name[key->len];
+		return !!xstrncmpz(a->name, key->str, key->len);
 	else
 		return strcmp(a->name, b->name);
 }
 
-static inline void init_remotes_hash(void)
-{
-	if (!remotes_hash.cmpfn)
-		hashmap_init(&remotes_hash, remotes_hash_cmp, NULL, 0);
-}
-
-static struct remote *make_remote(const char *name, int len)
+static struct remote *make_remote(struct remote_state *remote_state,
+				  const char *name, int len)
 {
-	struct remote *ret, *replaced;
+	struct remote *ret;
 	struct remotes_hash_key lookup;
 	struct hashmap_entry lookup_entry, *e;
 
 	if (!len)
 		len = strlen(name);
 
-	init_remotes_hash();
 	lookup.str = name;
 	lookup.len = len;
 	hashmap_entry_init(&lookup_entry, memhash(name, len));
 
-	e = hashmap_get(&remotes_hash, &lookup_entry, &lookup);
+	e = hashmap_get(&remote_state->remotes_hash, &lookup_entry, &lookup);
 	if (e)
 		return container_of(e, struct remote, ent);
 
@@ -158,15 +135,36 @@ static struct remote *make_remote(const char *name, int len)
 	refspec_init(&ret->push, REFSPEC_PUSH);
 	refspec_init(&ret->fetch, REFSPEC_FETCH);
 
-	ALLOC_GROW(remotes, remotes_nr + 1, remotes_alloc);
-	remotes[remotes_nr++] = ret;
+	ALLOC_GROW(remote_state->remotes, remote_state->remotes_nr + 1,
+		   remote_state->remotes_alloc);
+	remote_state->remotes[remote_state->remotes_nr++] = ret;
 
 	hashmap_entry_init(&ret->ent, lookup_entry.hash);
-	replaced = hashmap_put_entry(&remotes_hash, ret, ent);
-	assert(replaced == NULL);  /* no previous entry overwritten */
+	if (hashmap_put_entry(&remote_state->remotes_hash, ret, ent))
+		BUG("hashmap_put overwrote entry after hashmap_get returned NULL");
 	return ret;
 }
 
+static void remote_clear(struct remote *remote)
+{
+	int i;
+
+	free((char *)remote->name);
+	free((char *)remote->foreign_vcs);
+
+	for (i = 0; i < remote->url_nr; i++)
+		free((char *)remote->url[i]);
+	FREE_AND_NULL(remote->url);
+
+	for (i = 0; i < remote->pushurl_nr; i++)
+		free((char *)remote->pushurl[i]);
+	FREE_AND_NULL(remote->pushurl);
+	free((char *)remote->receivepack);
+	free((char *)remote->uploadpack);
+	FREE_AND_NULL(remote->http_proxy);
+	FREE_AND_NULL(remote->http_proxy_authmethod);
+}
+
 static void add_merge(struct branch *branch, const char *name)
 {
 	ALLOC_GROW(branch->merge_name, branch->merge_nr + 1,
@@ -174,23 +172,71 @@ static void add_merge(struct branch *branch, const char *name)
 	branch->merge_name[branch->merge_nr++] = name;
 }
 
-static struct branch *make_branch(const char *name, size_t len)
+struct branches_hash_key {
+	const char *str;
+	int len;
+};
+
+static int branches_hash_cmp(const void *cmp_data UNUSED,
+			     const struct hashmap_entry *eptr,
+			     const struct hashmap_entry *entry_or_key,
+			     const void *keydata)
+{
+	const struct branch *a, *b;
+	const struct branches_hash_key *key = keydata;
+
+	a = container_of(eptr, const struct branch, ent);
+	b = container_of(entry_or_key, const struct branch, ent);
+
+	if (key)
+		return !!xstrncmpz(a->name, key->str, key->len);
+	else
+		return strcmp(a->name, b->name);
+}
+
+static struct branch *find_branch(struct remote_state *remote_state,
+				  const char *name, size_t len)
+{
+	struct branches_hash_key lookup;
+	struct hashmap_entry lookup_entry, *e;
+
+	lookup.str = name;
+	lookup.len = len;
+	hashmap_entry_init(&lookup_entry, memhash(name, len));
+
+	e = hashmap_get(&remote_state->branches_hash, &lookup_entry, &lookup);
+	if (e)
+		return container_of(e, struct branch, ent);
+
+	return NULL;
+}
+
+static void die_on_missing_branch(struct repository *repo,
+				  struct branch *branch)
+{
+	/* branch == NULL is always valid because it represents detached HEAD. */
+	if (branch &&
+	    branch != find_branch(repo->remote_state, branch->name,
+				  strlen(branch->name)))
+		die("branch %s was not found in the repository", branch->name);
+}
+
+static struct branch *make_branch(struct remote_state *remote_state,
+				  const char *name, size_t len)
 {
 	struct branch *ret;
-	int i;
 
-	for (i = 0; i < branches_nr; i++) {
-		if (!strncmp(name, branches[i]->name, len) &&
-		    !branches[i]->name[len])
-			return branches[i];
-	}
+	ret = find_branch(remote_state, name, len);
+	if (ret)
+		return ret;
 
-	ALLOC_GROW(branches, branches_nr + 1, branches_alloc);
 	CALLOC_ARRAY(ret, 1);
-	branches[branches_nr++] = ret;
 	ret->name = xstrndup(name, len);
 	ret->refname = xstrfmt("refs/heads/%s", ret->name);
 
+	hashmap_entry_init(&ret->ent, memhash(name, len));
+	if (hashmap_put_entry(&remote_state->branches_hash, ret, ent))
+		BUG("hashmap_put overwrote entry after hashmap_get returned NULL");
 	return ret;
 }
 
@@ -229,7 +275,8 @@ static const char *skip_spaces(const char *s)
 	return s;
 }
 
-static void read_remotes_file(struct remote *remote)
+static void read_remotes_file(struct remote_state *remote_state,
+			      struct remote *remote)
 {
 	struct strbuf buf = STRBUF_INIT;
 	FILE *f = fopen_or_warn(git_path("remotes/%s", remote->name), "r");
@@ -244,7 +291,8 @@ static void read_remotes_file(struct remote *remote)
 		strbuf_rtrim(&buf);
 
 		if (skip_prefix(buf.buf, "URL:", &v))
-			add_url_alias(remote, xstrdup(skip_spaces(v)));
+			add_url_alias(remote_state, remote,
+				      xstrdup(skip_spaces(v)));
 		else if (skip_prefix(buf.buf, "Push:", &v))
 			refspec_append(&remote->push, skip_spaces(v));
 		else if (skip_prefix(buf.buf, "Pull:", &v))
@@ -254,7 +302,8 @@ static void read_remotes_file(struct remote *remote)
 	fclose(f);
 }
 
-static void read_branches_file(struct remote *remote)
+static void read_branches_file(struct remote_state *remote_state,
+			       struct remote *remote)
 {
 	char *frag;
 	struct strbuf buf = STRBUF_INIT;
@@ -286,7 +335,7 @@ static void read_branches_file(struct remote *remote)
 	else
 		frag = (char *)git_default_branch_name(0);
 
-	add_url_alias(remote, strbuf_detach(&buf, NULL));
+	add_url_alias(remote_state, remote, strbuf_detach(&buf, NULL));
 	refspec_appendf(&remote->fetch, "refs/heads/%s:refs/heads/%s",
 			frag, remote->name);
 
@@ -298,17 +347,25 @@ static void read_branches_file(struct remote *remote)
 	remote->fetch_tags = 1; /* always auto-follow */
 }
 
-static int handle_config(const char *key, const char *value, void *cb)
+static int handle_config(const char *key, const char *value,
+			 const struct config_context *ctx, void *cb)
 {
 	const char *name;
 	size_t namelen;
 	const char *subkey;
 	struct remote *remote;
 	struct branch *branch;
+	struct remote_state *remote_state = cb;
+	const struct key_value_info *kvi = ctx->kvi;
+
 	if (parse_config_key(key, "branch", &name, &namelen, &subkey) >= 0) {
+		/* There is no subsection. */
 		if (!name)
 			return 0;
-		branch = make_branch(name, namelen);
+		/* There is a subsection, but it is empty. */
+		if (!namelen)
+			return -1;
+		branch = make_branch(remote_state, name, namelen);
 		if (!strcmp(subkey, "remote")) {
 			return git_config_string(&branch->remote_name, key, value);
 		} else if (!strcmp(subkey, "pushremote")) {
@@ -327,12 +384,14 @@ static int handle_config(const char *key, const char *value, void *cb)
 		if (!strcmp(subkey, "insteadof")) {
 			if (!value)
 				return config_error_nonbool(key);
-			rewrite = make_rewrite(&rewrites, name, namelen);
+			rewrite = make_rewrite(&remote_state->rewrites, name,
+					       namelen);
 			add_instead_of(rewrite, xstrdup(value));
 		} else if (!strcmp(subkey, "pushinsteadof")) {
 			if (!value)
 				return config_error_nonbool(key);
-			rewrite = make_rewrite(&rewrites_push, name, namelen);
+			rewrite = make_rewrite(&remote_state->rewrites_push,
+					       name, namelen);
 			add_instead_of(rewrite, xstrdup(value));
 		}
 	}
@@ -342,7 +401,8 @@ static int handle_config(const char *key, const char *value, void *cb)
 
 	/* Handle remote.* variables */
 	if (!name && !strcmp(subkey, "pushdefault"))
-		return git_config_string(&pushremote_name, key, value);
+		return git_config_string(&remote_state->pushremote_name, key,
+					 value);
 
 	if (!name)
 		return 0;
@@ -352,10 +412,10 @@ static int handle_config(const char *key, const char *value, void *cb)
 			name);
 		return 0;
 	}
-	remote = make_remote(name, namelen);
+	remote = make_remote(remote_state, name, namelen);
 	remote->origin = REMOTE_CONFIG;
-	if (current_config_scope() == CONFIG_SCOPE_LOCAL ||
-	    current_config_scope() == CONFIG_SCOPE_WORKTREE)
+	if (kvi->scope == CONFIG_SCOPE_LOCAL ||
+	    kvi->scope == CONFIG_SCOPE_WORKTREE)
 		remote->configured_in_repo = 1;
 	if (!strcmp(subkey, "mirror"))
 		remote->mirror = git_config_bool(key, value);
@@ -422,44 +482,51 @@ static int handle_config(const char *key, const char *value, void *cb)
 	return 0;
 }
 
-static void alias_all_urls(void)
+static void alias_all_urls(struct remote_state *remote_state)
 {
 	int i, j;
-	for (i = 0; i < remotes_nr; i++) {
+	for (i = 0; i < remote_state->remotes_nr; i++) {
 		int add_pushurl_aliases;
-		if (!remotes[i])
+		if (!remote_state->remotes[i])
 			continue;
-		for (j = 0; j < remotes[i]->pushurl_nr; j++) {
-			remotes[i]->pushurl[j] = alias_url(remotes[i]->pushurl[j], &rewrites);
+		for (j = 0; j < remote_state->remotes[i]->pushurl_nr; j++) {
+			remote_state->remotes[i]->pushurl[j] =
+				alias_url(remote_state->remotes[i]->pushurl[j],
+					  &remote_state->rewrites);
 		}
-		add_pushurl_aliases = remotes[i]->pushurl_nr == 0;
-		for (j = 0; j < remotes[i]->url_nr; j++) {
+		add_pushurl_aliases = remote_state->remotes[i]->pushurl_nr == 0;
+		for (j = 0; j < remote_state->remotes[i]->url_nr; j++) {
 			if (add_pushurl_aliases)
-				add_pushurl_alias(remotes[i], remotes[i]->url[j]);
-			remotes[i]->url[j] = alias_url(remotes[i]->url[j], &rewrites);
+				add_pushurl_alias(
+					remote_state, remote_state->remotes[i],
+					remote_state->remotes[i]->url[j]);
+			remote_state->remotes[i]->url[j] =
+				alias_url(remote_state->remotes[i]->url[j],
+					  &remote_state->rewrites);
 		}
 	}
 }
 
-static void read_config(void)
+static void read_config(struct repository *repo, int early)
 {
-	static int loaded;
 	int flag;
 
-	if (loaded)
+	if (repo->remote_state->initialized)
 		return;
-	loaded = 1;
+	repo->remote_state->initialized = 1;
 
-	current_branch = NULL;
-	if (startup_info->have_repository) {
-		const char *head_ref = resolve_ref_unsafe("HEAD", 0, NULL, &flag);
+	repo->remote_state->current_branch = NULL;
+	if (startup_info->have_repository && !early) {
+		const char *head_ref = refs_resolve_ref_unsafe(
+			get_main_ref_store(repo), "HEAD", 0, NULL, &flag);
 		if (head_ref && (flag & REF_ISSYMREF) &&
 		    skip_prefix(head_ref, "refs/heads/", &head_ref)) {
-			current_branch = make_branch(head_ref, strlen(head_ref));
+			repo->remote_state->current_branch = make_branch(
+				repo->remote_state, head_ref, strlen(head_ref));
 		}
 	}
-	git_config(handle_config, NULL);
-	alias_all_urls();
+	repo_config(repo, handle_config, repo->remote_state);
+	alias_all_urls(repo->remote_state);
 }
 
 static int valid_remote_nick(const char *name)
@@ -474,7 +541,9 @@ static int valid_remote_nick(const char *name)
 	return 1;
 }
 
-const char *remote_for_branch(struct branch *branch, int *explicit)
+static const char *remotes_remote_for_branch(struct remote_state *remote_state,
+					     struct branch *branch,
+					     int *explicit)
 {
 	if (branch && branch->remote_name) {
 		if (explicit)
@@ -483,35 +552,66 @@ const char *remote_for_branch(struct branch *branch, int *explicit)
 	}
 	if (explicit)
 		*explicit = 0;
+	if (remote_state->remotes_nr == 1)
+		return remote_state->remotes[0]->name;
 	return "origin";
 }
 
-const char *pushremote_for_branch(struct branch *branch, int *explicit)
+const char *remote_for_branch(struct branch *branch, int *explicit)
+{
+	read_config(the_repository, 0);
+	die_on_missing_branch(the_repository, branch);
+
+	return remotes_remote_for_branch(the_repository->remote_state, branch,
+					 explicit);
+}
+
+static const char *
+remotes_pushremote_for_branch(struct remote_state *remote_state,
+			      struct branch *branch, int *explicit)
 {
 	if (branch && branch->pushremote_name) {
 		if (explicit)
 			*explicit = 1;
 		return branch->pushremote_name;
 	}
-	if (pushremote_name) {
+	if (remote_state->pushremote_name) {
 		if (explicit)
 			*explicit = 1;
-		return pushremote_name;
+		return remote_state->pushremote_name;
 	}
-	return remote_for_branch(branch, explicit);
+	return remotes_remote_for_branch(remote_state, branch, explicit);
 }
 
+const char *pushremote_for_branch(struct branch *branch, int *explicit)
+{
+	read_config(the_repository, 0);
+	die_on_missing_branch(the_repository, branch);
+
+	return remotes_pushremote_for_branch(the_repository->remote_state,
+					     branch, explicit);
+}
+
+static struct remote *remotes_remote_get(struct remote_state *remote_state,
+					 const char *name);
+
 const char *remote_ref_for_branch(struct branch *branch, int for_push)
 {
+	read_config(the_repository, 0);
+	die_on_missing_branch(the_repository, branch);
+
 	if (branch) {
 		if (!for_push) {
 			if (branch->merge_nr) {
 				return branch->merge_name[0];
 			}
 		} else {
-			const char *dst, *remote_name =
-				pushremote_for_branch(branch, NULL);
-			struct remote *remote = remote_get(remote_name);
+			const char *dst,
+				*remote_name = remotes_pushremote_for_branch(
+					the_repository->remote_state, branch,
+					NULL);
+			struct remote *remote = remotes_remote_get(
+				the_repository->remote_state, remote_name);
 
 			if (remote && remote->push.nr &&
 			    (dst = apply_refspecs(&remote->push,
@@ -523,41 +623,111 @@ const char *remote_ref_for_branch(struct branch *branch, int for_push)
 	return NULL;
 }
 
-static struct remote *remote_get_1(const char *name,
-				   const char *(*get_default)(struct branch *, int *))
+static void validate_remote_url(struct remote *remote)
+{
+	int i;
+	const char *value;
+	struct strbuf redacted = STRBUF_INIT;
+	int warn_not_die;
+
+	if (git_config_get_string_tmp("transfer.credentialsinurl", &value))
+		return;
+
+	if (!strcmp("warn", value))
+		warn_not_die = 1;
+	else if (!strcmp("die", value))
+		warn_not_die = 0;
+	else if (!strcmp("allow", value))
+		return;
+	else
+		die(_("unrecognized value transfer.credentialsInUrl: '%s'"), value);
+
+	for (i = 0; i < remote->url_nr; i++) {
+		struct url_info url_info = { 0 };
+
+		if (!url_normalize(remote->url[i], &url_info) ||
+		    !url_info.passwd_off)
+			goto loop_cleanup;
+
+		strbuf_reset(&redacted);
+		strbuf_add(&redacted, url_info.url, url_info.passwd_off);
+		strbuf_addstr(&redacted, "<redacted>");
+		strbuf_addstr(&redacted,
+			      url_info.url + url_info.passwd_off + url_info.passwd_len);
+
+		if (warn_not_die)
+			warning(_("URL '%s' uses plaintext credentials"), redacted.buf);
+		else
+			die(_("URL '%s' uses plaintext credentials"), redacted.buf);
+
+loop_cleanup:
+		free(url_info.url);
+	}
+
+	strbuf_release(&redacted);
+}
+
+static struct remote *
+remotes_remote_get_1(struct remote_state *remote_state, const char *name,
+		     const char *(*get_default)(struct remote_state *,
+						struct branch *, int *))
 {
 	struct remote *ret;
 	int name_given = 0;
 
-	read_config();
-
 	if (name)
 		name_given = 1;
 	else
-		name = get_default(current_branch, &name_given);
+		name = get_default(remote_state, remote_state->current_branch,
+				   &name_given);
 
-	ret = make_remote(name, 0);
+	ret = make_remote(remote_state, name, 0);
 	if (valid_remote_nick(name) && have_git_dir()) {
 		if (!valid_remote(ret))
-			read_remotes_file(ret);
+			read_remotes_file(remote_state, ret);
 		if (!valid_remote(ret))
-			read_branches_file(ret);
+			read_branches_file(remote_state, ret);
 	}
 	if (name_given && !valid_remote(ret))
-		add_url_alias(ret, name);
+		add_url_alias(remote_state, ret, name);
 	if (!valid_remote(ret))
 		return NULL;
+
+	validate_remote_url(ret);
+
 	return ret;
 }
 
+static inline struct remote *
+remotes_remote_get(struct remote_state *remote_state, const char *name)
+{
+	return remotes_remote_get_1(remote_state, name,
+				    remotes_remote_for_branch);
+}
+
 struct remote *remote_get(const char *name)
 {
-	return remote_get_1(name, remote_for_branch);
+	read_config(the_repository, 0);
+	return remotes_remote_get(the_repository->remote_state, name);
+}
+
+struct remote *remote_get_early(const char *name)
+{
+	read_config(the_repository, 1);
+	return remotes_remote_get(the_repository->remote_state, name);
+}
+
+static inline struct remote *
+remotes_pushremote_get(struct remote_state *remote_state, const char *name)
+{
+	return remotes_remote_get_1(remote_state, name,
+				    remotes_pushremote_for_branch);
 }
 
 struct remote *pushremote_get(const char *name)
 {
-	return remote_get_1(name, pushremote_for_branch);
+	read_config(the_repository, 0);
+	return remotes_pushremote_get(the_repository->remote_state, name);
 }
 
 int remote_is_configured(struct remote *remote, int in_repo)
@@ -572,12 +742,14 @@ int remote_is_configured(struct remote *remote, int in_repo)
 int for_each_remote(each_remote_fn fn, void *priv)
 {
 	int i, result = 0;
-	read_config();
-	for (i = 0; i < remotes_nr && !result; i++) {
-		struct remote *r = remotes[i];
-		if (!r)
+	read_config(the_repository, 0);
+	for (i = 0; i < the_repository->remote_state->remotes_nr && !result;
+	     i++) {
+		struct remote *remote =
+			the_repository->remote_state->remotes[i];
+		if (!remote)
 			continue;
-		result = fn(r, priv);
+		result = fn(remote, priv);
 	}
 	return result;
 }
@@ -691,7 +863,7 @@ static int refspec_match(const struct refspec_item *refspec,
 	return !strcmp(refspec->src, name);
 }
 
-static int omit_name_by_refspec(const char *name, struct refspec *rs)
+int omit_name_by_refspec(const char *name, struct refspec *rs)
 {
 	int i;
 
@@ -724,7 +896,7 @@ static int query_matches_negative_refspec(struct refspec *rs, struct refspec_ite
 {
 	int i, matched_negative = 0;
 	int find_src = !query->src;
-	struct string_list reversed = STRING_LIST_INIT_NODUP;
+	struct string_list reversed = STRING_LIST_INIT_DUP;
 	const char *needle = find_src ? query->dst : query->src;
 
 	/*
@@ -923,27 +1095,6 @@ void free_refs(struct ref *ref)
 	}
 }
 
-int ref_compare_name(const void *va, const void *vb)
-{
-	const struct ref *a = va, *b = vb;
-	return strcmp(a->name, b->name);
-}
-
-static void *ref_list_get_next(const void *a)
-{
-	return ((const struct ref *)a)->next;
-}
-
-static void ref_list_set_next(void *a, void *next)
-{
-	((struct ref *)a)->next = next;
-}
-
-void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *))
-{
-	*l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp);
-}
-
 int count_refspec_match(const char *pattern,
 			struct ref *refs,
 			struct ref **matched_ref)
@@ -1026,7 +1177,7 @@ static int try_explicit_object_name(const char *name,
 		return 0;
 	}
 
-	if (get_oid(name, &oid))
+	if (repo_get_oid(the_repository, name, &oid))
 		return -1;
 
 	if (match) {
@@ -1111,10 +1262,10 @@ static void show_push_unqualified_ref_name_error(const char *dst_value,
 		"Neither worked, so we gave up. You must fully qualify the ref."),
 	      dst_value, matched_src_name);
 
-	if (!advice_push_unqualified_ref_name)
+	if (!advice_enabled(ADVICE_PUSH_UNQUALIFIED_REF_NAME))
 		return;
 
-	if (get_oid(matched_src_name, &oid))
+	if (repo_get_oid(the_repository, matched_src_name, &oid))
 		BUG("'%s' is not a valid object, "
 		    "match_explicit_lhs() should catch this!",
 		    matched_src_name);
@@ -1592,7 +1743,7 @@ void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
 			else
 				/*
 				 * If the ref isn't stale, and is reachable
-				 * from from one of the reflog entries of
+				 * from one of the reflog entries of
 				 * the local branch, force the update.
 				 */
 				force_ref_update = 1;
@@ -1622,7 +1773,7 @@ void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
 		if (!reject_reason && !ref->deletion && !is_null_oid(&ref->old_oid)) {
 			if (starts_with(ref->name, "refs/tags/"))
 				reject_reason = REF_STATUS_REJECT_ALREADY_EXISTS;
-			else if (!has_object_file(&ref->old_oid))
+			else if (!repo_has_object_file(the_repository, &ref->old_oid))
 				reject_reason = REF_STATUS_REJECT_FETCH_FIRST;
 			else if (!lookup_commit_reference_gently(the_repository, &ref->old_oid, 1) ||
 				 !lookup_commit_reference_gently(the_repository, &ref->new_oid, 1))
@@ -1642,7 +1793,7 @@ void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
 	}
 }
 
-static void set_merge(struct branch *ret)
+static void set_merge(struct remote_state *remote_state, struct branch *ret)
 {
 	struct remote *remote;
 	char *ref;
@@ -1662,7 +1813,7 @@ static void set_merge(struct branch *ret)
 		return;
 	}
 
-	remote = remote_get(ret->remote_name);
+	remote = remotes_remote_get(remote_state, ret->remote_name);
 
 	CALLOC_ARRAY(ret->merge, ret->merge_nr);
 	for (i = 0; i < ret->merge_nr; i++) {
@@ -1671,8 +1822,9 @@ static void set_merge(struct branch *ret)
 		if (!remote_find_tracking(remote, ret->merge[i]) ||
 		    strcmp(ret->remote_name, "."))
 			continue;
-		if (dwim_ref(ret->merge_name[i], strlen(ret->merge_name[i]),
-			     &oid, &ref, 0) == 1)
+		if (repo_dwim_ref(the_repository, ret->merge_name[i],
+				  strlen(ret->merge_name[i]), &oid, &ref,
+				  0) == 1)
 			ret->merge[i]->dst = ref;
 		else
 			ret->merge[i]->dst = xstrdup(ret->merge_name[i]);
@@ -1683,12 +1835,13 @@ struct branch *branch_get(const char *name)
 {
 	struct branch *ret;
 
-	read_config();
+	read_config(the_repository, 0);
 	if (!name || !*name || !strcmp(name, "HEAD"))
-		ret = current_branch;
+		ret = the_repository->remote_state->current_branch;
 	else
-		ret = make_branch(name, strlen(name));
-	set_merge(ret);
+		ret = make_branch(the_repository->remote_state, name,
+				  strlen(name));
+	set_merge(the_repository->remote_state, ret);
 	return ret;
 }
 
@@ -1759,11 +1912,14 @@ static const char *tracking_for_push_dest(struct remote *remote,
 	return ret;
 }
 
-static const char *branch_get_push_1(struct branch *branch, struct strbuf *err)
+static const char *branch_get_push_1(struct remote_state *remote_state,
+				     struct branch *branch, struct strbuf *err)
 {
 	struct remote *remote;
 
-	remote = remote_get(pushremote_for_branch(branch, NULL));
+	remote = remotes_remote_get(
+		remote_state,
+		remotes_pushremote_for_branch(remote_state, branch, NULL));
 	if (!remote)
 		return error_buf(err,
 				 _("branch '%s' has no remote for pushing"),
@@ -1821,21 +1977,21 @@ static const char *branch_get_push_1(struct branch *branch, struct strbuf *err)
 
 const char *branch_get_push(struct branch *branch, struct strbuf *err)
 {
+	read_config(the_repository, 0);
+	die_on_missing_branch(the_repository, branch);
+
 	if (!branch)
 		return error_buf(err, _("HEAD does not point to a branch"));
 
 	if (!branch->push_tracking_ref)
-		branch->push_tracking_ref = branch_get_push_1(branch, err);
+		branch->push_tracking_ref = branch_get_push_1(
+			the_repository->remote_state, branch, err);
 	return branch->push_tracking_ref;
 }
 
-static int ignore_symref_update(const char *refname)
+static int ignore_symref_update(const char *refname, struct strbuf *scratch)
 {
-	int flag;
-
-	if (!resolve_ref_unsafe(refname, 0, NULL, &flag))
-		return 0; /* non-existing refs are OK */
-	return (flag & REF_ISSYMREF);
+	return !refs_read_symbolic_ref(get_main_ref_store(the_repository), refname, scratch);
 }
 
 /*
@@ -1848,6 +2004,7 @@ static int ignore_symref_update(const char *refname)
 static struct ref *get_expanded_map(const struct ref *remote_refs,
 				    const struct refspec_item *refspec)
 {
+	struct strbuf scratch = STRBUF_INIT;
 	const struct ref *ref;
 	struct ref *ret = NULL;
 	struct ref **tail = &ret;
@@ -1855,11 +2012,13 @@ static struct ref *get_expanded_map(const struct ref *remote_refs,
 	for (ref = remote_refs; ref; ref = ref->next) {
 		char *expn_name = NULL;
 
+		strbuf_reset(&scratch);
+
 		if (strchr(ref->name, '^'))
 			continue; /* a dereference item */
 		if (match_name_with_pattern(refspec->src, ref->name,
 					    refspec->dst, &expn_name) &&
-		    !ignore_symref_update(expn_name)) {
+		    !ignore_symref_update(expn_name, &scratch)) {
 			struct ref *cpy = copy_ref(ref);
 
 			cpy->peer_ref = alloc_ref(expn_name);
@@ -1871,6 +2030,7 @@ static struct ref *get_expanded_map(const struct ref *remote_refs,
 		free(expn_name);
 	}
 
+	strbuf_release(&scratch);
 	return ret;
 }
 
@@ -2002,6 +2162,9 @@ static int stat_branch_pair(const char *branch_name, const char *base,
 	struct object_id oid;
 	struct commit *ours, *theirs;
 	struct rev_info revs;
+	struct setup_revision_opt opt = {
+		.free_removed_argv_elements = 1,
+	};
 	struct strvec argv = STRVEC_INIT;
 
 	/* Cannot stat if what we used to build on no longer exists */
@@ -2036,7 +2199,7 @@ static int stat_branch_pair(const char *branch_name, const char *base,
 	strvec_push(&argv, "--");
 
 	repo_init_revisions(the_repository, &revs, NULL);
-	setup_revisions(argv.nr, argv.v, &revs, NULL);
+	setup_revisions(argv.nr, argv.v, &revs, &opt);
 	if (prepare_revision_walk(&revs))
 		die(_("revision walk setup failed"));
 
@@ -2056,6 +2219,7 @@ static int stat_branch_pair(const char *branch_name, const char *base,
 	clear_commit_marks(theirs, ALL_REV_FLAGS);
 
 	strvec_clear(&argv);
+	release_revisions(&revs);
 	return 1;
 }
 
@@ -2099,7 +2263,8 @@ int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
  * Return true when there is anything to report, otherwise false.
  */
 int format_tracking_info(struct branch *branch, struct strbuf *sb,
-			 enum ahead_behind_flags abf)
+			 enum ahead_behind_flags abf,
+			 int show_divergence_advice)
 {
 	int ours, theirs, sti;
 	const char *full_base;
@@ -2118,7 +2283,7 @@ int format_tracking_info(struct branch *branch, struct strbuf *sb,
 		strbuf_addf(sb,
 			_("Your branch is based on '%s', but the upstream is gone.\n"),
 			base);
-		if (advice_status_hints)
+		if (advice_enabled(ADVICE_STATUS_HINTS))
 			strbuf_addstr(sb,
 				_("  (use \"git branch --unset-upstream\" to fixup)\n"));
 	} else if (!sti) {
@@ -2129,7 +2294,7 @@ int format_tracking_info(struct branch *branch, struct strbuf *sb,
 		strbuf_addf(sb,
 			    _("Your branch and '%s' refer to different commits.\n"),
 			    base);
-		if (advice_status_hints)
+		if (advice_enabled(ADVICE_STATUS_HINTS))
 			strbuf_addf(sb, _("  (use \"%s\" for details)\n"),
 				    "git status --ahead-behind");
 	} else if (!theirs) {
@@ -2138,7 +2303,7 @@ int format_tracking_info(struct branch *branch, struct strbuf *sb,
 			   "Your branch is ahead of '%s' by %d commits.\n",
 			   ours),
 			base, ours);
-		if (advice_status_hints)
+		if (advice_enabled(ADVICE_STATUS_HINTS))
 			strbuf_addstr(sb,
 				_("  (use \"git push\" to publish your local commits)\n"));
 	} else if (!ours) {
@@ -2149,7 +2314,7 @@ int format_tracking_info(struct branch *branch, struct strbuf *sb,
 			       "and can be fast-forwarded.\n",
 			   theirs),
 			base, theirs);
-		if (advice_status_hints)
+		if (advice_enabled(ADVICE_STATUS_HINTS))
 			strbuf_addstr(sb,
 				_("  (use \"git pull\" to update your local branch)\n"));
 	} else {
@@ -2162,16 +2327,18 @@ int format_tracking_info(struct branch *branch, struct strbuf *sb,
 			       "respectively.\n",
 			   ours + theirs),
 			base, ours, theirs);
-		if (advice_status_hints)
+		if (show_divergence_advice &&
+		    advice_enabled(ADVICE_STATUS_HINTS))
 			strbuf_addstr(sb,
-				_("  (use \"git pull\" to merge the remote branch into yours)\n"));
+				_("  (use \"git pull\" if you want to integrate the remote branch with yours)\n"));
 	}
 	free(base);
 	return 1;
 }
 
 static int one_local_ref(const char *refname, const struct object_id *oid,
-			 int flag, void *cb_data)
+			 int flag UNUSED,
+			 void *cb_data)
 {
 	struct ref ***local_tail = cb_data;
 	struct ref *ref;
@@ -2355,7 +2522,7 @@ static int parse_push_cas_option(struct push_cas_option *cas, const char *arg, i
 		entry->use_tracking = 1;
 	else if (!colon[1])
 		oidclr(&entry->expect);
-	else if (get_oid(colon + 1, &entry->expect))
+	else if (repo_get_oid(the_repository, colon + 1, &entry->expect))
 		return error(_("cannot parse expected object name '%s'"),
 			     colon + 1);
 	return 0;
@@ -2403,7 +2570,7 @@ struct reflog_commit_array {
 	size_t nr, alloc;
 };
 
-#define REFLOG_COMMIT_ARRAY_INIT { NULL, 0, 0 }
+#define REFLOG_COMMIT_ARRAY_INIT { 0 }
 
 /* Append a commit to the array. */
 static void append_commit(struct reflog_commit_array *arr,
@@ -2427,19 +2594,22 @@ struct check_and_collect_until_cb_data {
 };
 
 /* Get the timestamp of the latest entry. */
-static int peek_reflog(struct object_id *o_oid, struct object_id *n_oid,
-		       const char *ident, timestamp_t timestamp,
-		       int tz, const char *message, void *cb_data)
+static int peek_reflog(struct object_id *o_oid UNUSED,
+		       struct object_id *n_oid UNUSED,
+		       const char *ident UNUSED,
+		       timestamp_t timestamp, int tz UNUSED,
+		       const char *message UNUSED, void *cb_data)
 {
 	timestamp_t *ts = cb_data;
 	*ts = timestamp;
 	return 1;
 }
 
-static int check_and_collect_until(struct object_id *o_oid,
+static int check_and_collect_until(struct object_id *o_oid UNUSED,
 				   struct object_id *n_oid,
-				   const char *ident, timestamp_t timestamp,
-				   int tz, const char *message, void *cb_data)
+				   const char *ident UNUSED,
+				   timestamp_t timestamp, int tz UNUSED,
+				   const char *message UNUSED, void *cb_data)
 {
 	struct commit *commit;
 	struct check_and_collect_until_cb_data *cb = cb_data;
@@ -2509,7 +2679,7 @@ static int is_reachable_in_reflog(const char *local, const struct ref *remote)
 		if (MERGE_BASES_BATCH_SIZE < size)
 			size = MERGE_BASES_BATCH_SIZE;
 
-		if ((ret = in_merge_bases_many(commit, size, chunk)))
+		if ((ret = repo_in_merge_bases_many(the_repository, commit, size, chunk, 0)))
 			break;
 	}
 
@@ -2585,3 +2755,126 @@ void apply_push_cas(struct push_cas_option *cas,
 			check_if_includes_upstream(ref);
 	}
 }
+
+struct remote_state *remote_state_new(void)
+{
+	struct remote_state *r = xmalloc(sizeof(*r));
+
+	memset(r, 0, sizeof(*r));
+
+	hashmap_init(&r->remotes_hash, remotes_hash_cmp, NULL, 0);
+	hashmap_init(&r->branches_hash, branches_hash_cmp, NULL, 0);
+	return r;
+}
+
+void remote_state_clear(struct remote_state *remote_state)
+{
+	int i;
+
+	for (i = 0; i < remote_state->remotes_nr; i++)
+		remote_clear(remote_state->remotes[i]);
+	FREE_AND_NULL(remote_state->remotes);
+	remote_state->remotes_alloc = 0;
+	remote_state->remotes_nr = 0;
+
+	hashmap_clear_and_free(&remote_state->remotes_hash, struct remote, ent);
+	hashmap_clear_and_free(&remote_state->branches_hash, struct remote, ent);
+}
+
+/*
+ * Returns 1 if it was the last chop before ':'.
+ */
+static int chop_last_dir(char **remoteurl, int is_relative)
+{
+	char *rfind = find_last_dir_sep(*remoteurl);
+	if (rfind) {
+		*rfind = '\0';
+		return 0;
+	}
+
+	rfind = strrchr(*remoteurl, ':');
+	if (rfind) {
+		*rfind = '\0';
+		return 1;
+	}
+
+	if (is_relative || !strcmp(".", *remoteurl))
+		die(_("cannot strip one component off url '%s'"),
+			*remoteurl);
+
+	free(*remoteurl);
+	*remoteurl = xstrdup(".");
+	return 0;
+}
+
+char *relative_url(const char *remote_url, const char *url,
+		   const char *up_path)
+{
+	int is_relative = 0;
+	int colonsep = 0;
+	char *out;
+	char *remoteurl;
+	struct strbuf sb = STRBUF_INIT;
+	size_t len;
+
+	if (!url_is_local_not_ssh(url) || is_absolute_path(url))
+		return xstrdup(url);
+
+	len = strlen(remote_url);
+	if (!len)
+		BUG("invalid empty remote_url");
+
+	remoteurl = xstrdup(remote_url);
+	if (is_dir_sep(remoteurl[len-1]))
+		remoteurl[len-1] = '\0';
+
+	if (!url_is_local_not_ssh(remoteurl) || is_absolute_path(remoteurl))
+		is_relative = 0;
+	else {
+		is_relative = 1;
+		/*
+		 * Prepend a './' to ensure all relative
+		 * remoteurls start with './' or '../'
+		 */
+		if (!starts_with_dot_slash_native(remoteurl) &&
+		    !starts_with_dot_dot_slash_native(remoteurl)) {
+			strbuf_reset(&sb);
+			strbuf_addf(&sb, "./%s", remoteurl);
+			free(remoteurl);
+			remoteurl = strbuf_detach(&sb, NULL);
+		}
+	}
+	/*
+	 * When the url starts with '../', remove that and the
+	 * last directory in remoteurl.
+	 */
+	while (*url) {
+		if (starts_with_dot_dot_slash_native(url)) {
+			url += 3;
+			colonsep |= chop_last_dir(&remoteurl, is_relative);
+		} else if (starts_with_dot_slash_native(url))
+			url += 2;
+		else
+			break;
+	}
+	strbuf_reset(&sb);
+	strbuf_addf(&sb, "%s%s%s", remoteurl, colonsep ? ":" : "/", url);
+	if (ends_with(url, "/"))
+		strbuf_setlen(&sb, sb.len - 1);
+	free(remoteurl);
+
+	if (starts_with_dot_slash_native(sb.buf))
+		out = xstrdup(sb.buf + 2);
+	else
+		out = xstrdup(sb.buf);
+
+	if (!up_path || !is_relative) {
+		strbuf_release(&sb);
+		return out;
+	}
+
+	strbuf_reset(&sb);
+	strbuf_addf(&sb, "%s%s", up_path, out);
+	free(out);
+	return strbuf_detach(&sb, NULL);
+}