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https://github.com/git/git
synced 2024-08-27 19:49:21 +00:00
Convert many resolve_ref() calls to read_ref*() and ref_exists()
resolve_ref() may return a pointer to a static buffer, which is not safe for long-term use because if another resolve_ref() call happens, the buffer may be changed. Many call sites though do not care about this buffer. They simply check if the return value is NULL or not. Convert all these call sites to new wrappers to reduce resolve_ref() calls from 57 to 34. If we change resolve_ref() prototype later on to avoid passing static buffer out, this helps reduce changes. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
parent
bc1bbe0c19
commit
c689332391
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@ -186,7 +186,7 @@ static int delete_branches(int argc, const char **argv, int force, int kinds)
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free(name);
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name = xstrdup(mkpath(fmt, bname.buf));
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if (!resolve_ref(name, sha1, 1, NULL)) {
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if (read_ref(name, sha1)) {
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error(_("%sbranch '%s' not found."),
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remote, bname.buf);
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ret = 1;
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@ -565,7 +565,6 @@ static int print_ref_list(int kinds, int detached, int verbose, int abbrev, stru
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static void rename_branch(const char *oldname, const char *newname, int force)
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{
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struct strbuf oldref = STRBUF_INIT, newref = STRBUF_INIT, logmsg = STRBUF_INIT;
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unsigned char sha1[20];
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struct strbuf oldsection = STRBUF_INIT, newsection = STRBUF_INIT;
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int recovery = 0;
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@ -577,7 +576,7 @@ static void rename_branch(const char *oldname, const char *newname, int force)
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* Bad name --- this could be an attempt to rename a
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* ref that we used to allow to be created by accident.
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*/
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if (resolve_ref(oldref.buf, sha1, 1, NULL))
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if (ref_exists(oldref.buf))
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recovery = 1;
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else
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die(_("Invalid branch name: '%s'"), oldname);
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@ -288,7 +288,7 @@ static int checkout_paths(struct tree *source_tree, const char **pathspec,
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commit_locked_index(lock_file))
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die(_("unable to write new index file"));
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resolve_ref("HEAD", rev, 0, &flag);
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read_ref_full("HEAD", rev, 0, &flag);
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head = lookup_commit_reference_gently(rev, 1);
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errs |= post_checkout_hook(head, head, 0);
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@ -866,7 +866,7 @@ static int parse_branchname_arg(int argc, const char **argv,
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setup_branch_path(new);
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if (!check_refname_format(new->path, 0) &&
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resolve_ref(new->path, branch_rev, 1, NULL))
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!read_ref(new->path, branch_rev))
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hashcpy(rev, branch_rev);
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else
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new->path = NULL; /* not an existing branch */
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@ -420,7 +420,7 @@ static struct object *want_commit(const char *name)
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static void merge_name(const char *remote, struct strbuf *msg)
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{
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struct object *remote_head;
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unsigned char branch_head[20], buf_sha[20];
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unsigned char branch_head[20];
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struct strbuf buf = STRBUF_INIT;
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struct strbuf bname = STRBUF_INIT;
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const char *ptr;
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@ -479,7 +479,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
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strbuf_addstr(&truname, "refs/heads/");
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strbuf_addstr(&truname, remote);
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strbuf_setlen(&truname, truname.len - len);
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if (resolve_ref(truname.buf, buf_sha, 1, NULL)) {
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if (ref_exists(truname.buf)) {
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strbuf_addf(msg,
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"%s\t\tbranch '%s'%s of .\n",
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sha1_to_hex(remote_head->sha1),
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@ -343,8 +343,7 @@ static int get_ref_states(const struct ref *remote_refs, struct ref_states *stat
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states->tracked.strdup_strings = 1;
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states->stale.strdup_strings = 1;
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for (ref = fetch_map; ref; ref = ref->next) {
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unsigned char sha1[20];
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if (!ref->peer_ref || read_ref(ref->peer_ref->name, sha1))
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if (!ref->peer_ref || !ref_exists(ref->peer_ref->name))
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string_list_append(&states->new, abbrev_branch(ref->name));
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else
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string_list_append(&states->tracked, abbrev_branch(ref->name));
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@ -710,7 +709,7 @@ static int mv(int argc, const char **argv)
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int flag = 0;
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unsigned char sha1[20];
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resolve_ref(item->string, sha1, 1, &flag);
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read_ref_full(item->string, sha1, 1, &flag);
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if (!(flag & REF_ISSYMREF))
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continue;
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if (delete_ref(item->string, NULL, REF_NODEREF))
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@ -1220,10 +1219,9 @@ static int set_head(int argc, const char **argv)
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usage_with_options(builtin_remote_sethead_usage, options);
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if (head_name) {
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unsigned char sha1[20];
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strbuf_addf(&buf2, "refs/remotes/%s/%s", argv[0], head_name);
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/* make sure it's valid */
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if (!resolve_ref(buf2.buf, sha1, 1, NULL))
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if (!ref_exists(buf2.buf))
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result |= error("Not a valid ref: %s", buf2.buf);
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else if (create_symref(buf.buf, buf2.buf, "remote set-head"))
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result |= error("Could not setup %s", buf.buf);
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@ -58,7 +58,7 @@ static int for_each_replace_name(const char **argv, each_replace_name_fn fn)
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had_error = 1;
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continue;
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}
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if (!resolve_ref(ref, sha1, 1, NULL)) {
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if (read_ref(ref, sha1)) {
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error("replace ref '%s' not found.", *p);
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had_error = 1;
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continue;
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@ -97,7 +97,7 @@ static int replace_object(const char *object_ref, const char *replace_ref,
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if (check_refname_format(ref, 0))
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die("'%s' is not a valid ref name.", ref);
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if (!resolve_ref(ref, prev, 1, NULL))
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if (read_ref(ref, prev))
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hashclr(prev);
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else if (!force)
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die("replace ref '%s' already exists", ref);
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@ -225,7 +225,7 @@ int cmd_show_ref(int argc, const char **argv, const char *prefix)
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unsigned char sha1[20];
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if (!prefixcmp(*pattern, "refs/") &&
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resolve_ref(*pattern, sha1, 1, NULL)) {
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!read_ref(*pattern, sha1)) {
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if (!quiet)
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show_one(*pattern, sha1);
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}
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@ -174,7 +174,7 @@ static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
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had_error = 1;
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continue;
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}
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if (!resolve_ref(ref, sha1, 1, NULL)) {
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if (read_ref(ref, sha1)) {
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error(_("tag '%s' not found."), *p);
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had_error = 1;
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continue;
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@ -518,7 +518,7 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
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if (strbuf_check_tag_ref(&ref, tag))
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die(_("'%s' is not a valid tag name."), tag);
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if (!resolve_ref(ref.buf, prev, 1, NULL))
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if (read_ref(ref.buf, prev))
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hashclr(prev);
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else if (!force)
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die(_("tag '%s' already exists"), tag);
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2
bundle.c
2
bundle.c
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@ -320,7 +320,7 @@ int create_bundle(struct bundle_header *header, const char *path,
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continue;
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if (dwim_ref(e->name, strlen(e->name), sha1, &ref) != 1)
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continue;
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if (!resolve_ref(e->name, sha1, 1, &flag))
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if (read_ref_full(e->name, sha1, 1, &flag))
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flag = 0;
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display_ref = (flag & REF_ISSYMREF) ? e->name : ref;
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2
cache.h
2
cache.h
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@ -832,6 +832,8 @@ static inline int get_sha1_with_context(const char *str, unsigned char *sha1, st
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extern int get_sha1_hex(const char *hex, unsigned char *sha1);
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extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
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extern int read_ref_full(const char *filename, unsigned char *sha1,
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int reading, int *flags);
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extern int read_ref(const char *filename, unsigned char *sha1);
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/*
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@ -568,7 +568,7 @@ int notes_merge(struct notes_merge_options *o,
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o->local_ref, o->remote_ref);
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/* Dereference o->local_ref into local_sha1 */
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if (!resolve_ref(o->local_ref, local_sha1, 0, NULL))
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if (read_ref_full(o->local_ref, local_sha1, 0, NULL))
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die("Failed to resolve local notes ref '%s'", o->local_ref);
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else if (!check_refname_format(o->local_ref, 0) &&
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is_null_sha1(local_sha1))
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27
refs.c
27
refs.c
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@ -334,7 +334,7 @@ static void get_ref_dir(const char *submodule, const char *base,
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flag |= REF_ISBROKEN;
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}
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} else
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if (!resolve_ref(ref, sha1, 1, &flag)) {
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if (read_ref_full(ref, sha1, 1, &flag)) {
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hashclr(sha1);
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flag |= REF_ISBROKEN;
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}
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@ -612,13 +612,18 @@ struct ref_filter {
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void *cb_data;
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};
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int read_ref(const char *ref, unsigned char *sha1)
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int read_ref_full(const char *ref, unsigned char *sha1, int reading, int *flags)
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{
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if (resolve_ref(ref, sha1, 1, NULL))
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if (resolve_ref(ref, sha1, reading, flags))
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return 0;
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return -1;
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}
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int read_ref(const char *ref, unsigned char *sha1)
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{
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return read_ref_full(ref, sha1, 1, NULL);
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}
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#define DO_FOR_EACH_INCLUDE_BROKEN 01
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static int do_one_ref(const char *base, each_ref_fn fn, int trim,
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int flags, void *cb_data, struct ref_entry *entry)
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goto fallback;
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}
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if (!resolve_ref(ref, base, 1, &flag))
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if (read_ref_full(ref, base, 1, &flag))
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return -1;
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if ((flag & REF_ISPACKED)) {
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return 0;
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}
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if (resolve_ref("HEAD", sha1, 1, &flag))
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if (!read_ref_full("HEAD", sha1, 1, &flag))
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return fn("HEAD", sha1, flag, cb_data);
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return 0;
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int flag;
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strbuf_addf(&buf, "%sHEAD", get_git_namespace());
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if (resolve_ref(buf.buf, sha1, 1, &flag))
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if (!read_ref_full(buf.buf, sha1, 1, &flag))
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ret = fn(buf.buf, sha1, flag, cb_data);
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strbuf_release(&buf);
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static struct ref_lock *verify_lock(struct ref_lock *lock,
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const unsigned char *old_sha1, int mustexist)
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{
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if (!resolve_ref(lock->ref_name, lock->old_sha1, mustexist, NULL)) {
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if (read_ref_full(lock->ref_name, lock->old_sha1, mustexist, NULL)) {
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error("Can't verify ref %s", lock->ref_name);
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unlock_ref(lock);
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return NULL;
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goto rollback;
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}
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if (resolve_ref(newref, sha1, 1, &flag) && delete_ref(newref, sha1, REF_NODEREF)) {
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if (!read_ref_full(newref, sha1, 1, &flag) &&
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delete_ref(newref, sha1, REF_NODEREF)) {
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if (errno==EISDIR) {
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if (remove_empty_directories(git_path("%s", newref))) {
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error("Directory not empty: %s", newref);
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retval = do_for_each_reflog(log, fn, cb_data);
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} else {
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unsigned char sha1[20];
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if (!resolve_ref(log, sha1, 0, NULL))
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if (read_ref_full(log, sha1, 0, NULL))
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retval = error("bad ref for %s", log);
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else
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retval = fn(log, sha1, 0, cb_data);
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@ -2072,7 +2078,6 @@ char *shorten_unambiguous_ref(const char *ref, int strict)
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*/
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for (j = 0; j < rules_to_fail; j++) {
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const char *rule = ref_rev_parse_rules[j];
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unsigned char short_objectname[20];
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char refname[PATH_MAX];
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/* skip matched rule */
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*/
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mksnpath(refname, sizeof(refname),
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rule, short_name_len, short_name);
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if (!read_ref(refname, short_objectname))
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if (ref_exists(refname))
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break;
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}
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4
remote.c
4
remote.c
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@ -1507,13 +1507,13 @@ int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs)
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* nothing to report.
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*/
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base = branch->merge[0]->dst;
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if (!resolve_ref(base, sha1, 1, NULL))
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if (read_ref(base, sha1))
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return 0;
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theirs = lookup_commit_reference(sha1);
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if (!theirs)
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return 0;
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if (!resolve_ref(branch->refname, sha1, 1, NULL))
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if (read_ref(branch->refname, sha1))
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return 0;
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ours = lookup_commit_reference(sha1);
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if (!ours)
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