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-rw-r--r--refs.c1245
1 files changed, 816 insertions, 429 deletions
diff --git a/refs.c b/refs.c
index 639cba9..55d2e0b 100644
--- a/refs.c
+++ b/refs.c
@@ -2,40 +2,63 @@
* The backend-independent part of the reference module.
*/
-#include "cache.h"
+#include "git-compat-util.h"
+#include "advice.h"
#include "config.h"
+#include "environment.h"
#include "hashmap.h"
+#include "gettext.h"
+#include "hex.h"
#include "lockfile.h"
#include "iterator.h"
#include "refs.h"
#include "refs/refs-internal.h"
#include "run-command.h"
-#include "object-store.h"
+#include "hook.h"
+#include "object-name.h"
+#include "object-store-ll.h"
#include "object.h"
+#include "path.h"
#include "tag.h"
#include "submodule.h"
#include "worktree.h"
-#include "argv-array.h"
+#include "strvec.h"
#include "repository.h"
+#include "setup.h"
#include "sigchain.h"
+#include "date.h"
+#include "commit.h"
+#include "wildmatch.h"
/*
* List of all available backends
*/
-static struct ref_storage_be *refs_backends = &refs_be_files;
+static const struct ref_storage_be *refs_backends[] = {
+ [REF_STORAGE_FORMAT_FILES] = &refs_be_files,
+ [REF_STORAGE_FORMAT_REFTABLE] = &refs_be_reftable,
+};
-static struct ref_storage_be *find_ref_storage_backend(const char *name)
+static const struct ref_storage_be *find_ref_storage_backend(unsigned int ref_storage_format)
{
- struct ref_storage_be *be;
- for (be = refs_backends; be; be = be->next)
- if (!strcmp(be->name, name))
- return be;
+ if (ref_storage_format < ARRAY_SIZE(refs_backends))
+ return refs_backends[ref_storage_format];
return NULL;
}
-int ref_storage_backend_exists(const char *name)
+unsigned int ref_storage_format_by_name(const char *name)
+{
+ for (unsigned int i = 0; i < ARRAY_SIZE(refs_backends); i++)
+ if (refs_backends[i] && !strcmp(refs_backends[i]->name, name))
+ return i;
+ return REF_STORAGE_FORMAT_UNKNOWN;
+}
+
+const char *ref_storage_format_to_name(unsigned int ref_storage_format)
{
- return find_ref_storage_backend(name) != NULL;
+ const struct ref_storage_be *be = find_ref_storage_backend(ref_storage_format);
+ if (!be)
+ return "unknown";
+ return be->name;
}
/*
@@ -59,6 +82,88 @@ static unsigned char refname_disposition[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 4, 4
};
+struct ref_namespace_info ref_namespace[] = {
+ [NAMESPACE_HEAD] = {
+ .ref = "HEAD",
+ .decoration = DECORATION_REF_HEAD,
+ .exact = 1,
+ },
+ [NAMESPACE_BRANCHES] = {
+ .ref = "refs/heads/",
+ .decoration = DECORATION_REF_LOCAL,
+ },
+ [NAMESPACE_TAGS] = {
+ .ref = "refs/tags/",
+ .decoration = DECORATION_REF_TAG,
+ },
+ [NAMESPACE_REMOTE_REFS] = {
+ /*
+ * The default refspec for new remotes copies refs from
+ * refs/heads/ on the remote into refs/remotes/<remote>/.
+ * As such, "refs/remotes/" has special handling.
+ */
+ .ref = "refs/remotes/",
+ .decoration = DECORATION_REF_REMOTE,
+ },
+ [NAMESPACE_STASH] = {
+ /*
+ * The single ref "refs/stash" stores the latest stash.
+ * Older stashes can be found in the reflog.
+ */
+ .ref = "refs/stash",
+ .exact = 1,
+ .decoration = DECORATION_REF_STASH,
+ },
+ [NAMESPACE_REPLACE] = {
+ /*
+ * This namespace allows Git to act as if one object ID
+ * points to the content of another. Unlike the other
+ * ref namespaces, this one can be changed by the
+ * GIT_REPLACE_REF_BASE environment variable. This
+ * .namespace value will be overwritten in setup_git_env().
+ */
+ .ref = "refs/replace/",
+ .decoration = DECORATION_GRAFTED,
+ },
+ [NAMESPACE_NOTES] = {
+ /*
+ * The refs/notes/commit ref points to the tip of a
+ * parallel commit history that adds metadata to commits
+ * in the normal history. This ref can be overwritten
+ * by the core.notesRef config variable or the
+ * GIT_NOTES_REFS environment variable.
+ */
+ .ref = "refs/notes/commit",
+ .exact = 1,
+ },
+ [NAMESPACE_PREFETCH] = {
+ /*
+ * Prefetch refs are written by the background 'fetch'
+ * maintenance task. It allows faster foreground fetches
+ * by advertising these previously-downloaded tips without
+ * updating refs/remotes/ without user intervention.
+ */
+ .ref = "refs/prefetch/",
+ },
+ [NAMESPACE_REWRITTEN] = {
+ /*
+ * Rewritten refs are used by the 'label' command in the
+ * sequencer. These are particularly useful during an
+ * interactive rebase that uses the 'merge' command.
+ */
+ .ref = "refs/rewritten/",
+ },
+};
+
+void update_ref_namespace(enum ref_namespace namespace, char *ref)
+{
+ struct ref_namespace_info *info = &ref_namespace[namespace];
+ if (info->ref_updated)
+ free(info->ref);
+ info->ref = ref;
+ info->ref_updated = 1;
+}
+
/*
* Try to read one refname component from the front of refname.
* Return the length of the component found, or -1 if the component is
@@ -255,12 +360,13 @@ int refname_is_safe(const char *refname)
* does not exist, emit a warning and return false.
*/
int ref_resolves_to_object(const char *refname,
+ struct repository *repo,
const struct object_id *oid,
unsigned int flags)
{
if (flags & REF_ISBROKEN)
return 0;
- if (!has_object_file(oid)) {
+ if (!repo_has_object_file(repo, oid)) {
error(_("%s does not point to a valid object!"), refname);
return 0;
}
@@ -286,36 +392,33 @@ char *resolve_refdup(const char *refname, int resolve_flags,
oid, flags);
}
-/* The argument to filter_refs */
-struct ref_filter {
+/* The argument to for_each_filter_refs */
+struct for_each_ref_filter {
const char *pattern;
const char *prefix;
each_ref_fn *fn;
void *cb_data;
};
-int refs_read_ref_full(struct ref_store *refs, const char *refname,
- int resolve_flags, struct object_id *oid, int *flags)
+int read_ref_full(const char *refname, int resolve_flags, struct object_id *oid, int *flags)
{
- if (refs_resolve_ref_unsafe(refs, refname, resolve_flags, oid, flags))
+ struct ref_store *refs = get_main_ref_store(the_repository);
+
+ if (refs_resolve_ref_unsafe(refs, refname, resolve_flags,
+ oid, flags))
return 0;
return -1;
}
-int read_ref_full(const char *refname, int resolve_flags, struct object_id *oid, int *flags)
-{
- return refs_read_ref_full(get_main_ref_store(the_repository), refname,
- resolve_flags, oid, flags);
-}
-
int read_ref(const char *refname, struct object_id *oid)
{
return read_ref_full(refname, RESOLVE_REF_READING, oid, NULL);
}
-static int refs_ref_exists(struct ref_store *refs, const char *refname)
+int refs_ref_exists(struct ref_store *refs, const char *refname)
{
- return !!refs_resolve_ref_unsafe(refs, refname, RESOLVE_REF_READING, NULL, NULL);
+ return !!refs_resolve_ref_unsafe(refs, refname, RESOLVE_REF_READING,
+ NULL, NULL);
}
int ref_exists(const char *refname)
@@ -323,10 +426,11 @@ int ref_exists(const char *refname)
return refs_ref_exists(get_main_ref_store(the_repository), refname);
}
-static int filter_refs(const char *refname, const struct object_id *oid,
- int flags, void *data)
+static int for_each_filter_refs(const char *refname,
+ const struct object_id *oid,
+ int flags, void *data)
{
- struct ref_filter *filter = (struct ref_filter *)data;
+ struct for_each_ref_filter *filter = data;
if (wildmatch(filter->pattern, refname, 0))
return 0;
@@ -337,7 +441,7 @@ static int filter_refs(const char *refname, const struct object_id *oid,
enum peel_status peel_object(const struct object_id *name, struct object_id *oid)
{
- struct object *o = lookup_unknown_object(name);
+ struct object *o = lookup_unknown_object(the_repository, name);
if (o->type == OBJ_NONE) {
int type = oid_object_info(the_repository, name, NULL);
@@ -363,7 +467,8 @@ struct warn_if_dangling_data {
const char *msg_fmt;
};
-static int warn_if_dangling_symref(const char *refname, const struct object_id *oid,
+static int warn_if_dangling_symref(const char *refname,
+ const struct object_id *oid UNUSED,
int flags, void *cb_data)
{
struct warn_if_dangling_data *d = cb_data;
@@ -460,11 +565,16 @@ void normalize_glob_ref(struct string_list_item *item, const char *prefix,
if (*pattern == '/')
BUG("pattern must not start with '/'");
- if (prefix) {
+ if (prefix)
strbuf_addstr(&normalized_pattern, prefix);
- }
- else if (!starts_with(pattern, "refs/"))
+ else if (!starts_with(pattern, "refs/") &&
+ strcmp(pattern, "HEAD"))
strbuf_addstr(&normalized_pattern, "refs/");
+ /*
+ * NEEDSWORK: Special case other symrefs such as REBASE_HEAD,
+ * MERGE_HEAD, etc.
+ */
+
strbuf_addstr(&normalized_pattern, pattern);
strbuf_strip_suffix(&normalized_pattern, "/");
@@ -477,7 +587,7 @@ int for_each_glob_ref_in(each_ref_fn fn, const char *pattern,
const char *prefix, void *cb_data)
{
struct strbuf real_pattern = STRBUF_INIT;
- struct ref_filter filter;
+ struct for_each_ref_filter filter;
int ret;
if (!prefix && !starts_with(pattern, "refs/"))
@@ -497,7 +607,7 @@ int for_each_glob_ref_in(each_ref_fn fn, const char *pattern,
filter.prefix = prefix;
filter.fn = fn;
filter.cb_data = cb_data;
- ret = for_each_ref(filter_refs, &filter);
+ ret = for_each_ref(for_each_filter_refs, &filter);
strbuf_release(&real_pattern);
return ret;
@@ -553,26 +663,45 @@ int refname_match(const char *abbrev_name, const char *full_name)
* Given a 'prefix' expand it by the rules in 'ref_rev_parse_rules' and add
* the results to 'prefixes'
*/
-void expand_ref_prefix(struct argv_array *prefixes, const char *prefix)
+void expand_ref_prefix(struct strvec *prefixes, const char *prefix)
{
const char **p;
int len = strlen(prefix);
for (p = ref_rev_parse_rules; *p; p++)
- argv_array_pushf(prefixes, *p, len, prefix);
+ strvec_pushf(prefixes, *p, len, prefix);
}
-char *repo_default_branch_name(struct repository *r)
+static const char default_branch_name_advice[] = N_(
+"Using '%s' as the name for the initial branch. This default branch name\n"
+"is subject to change. To configure the initial branch name to use in all\n"
+"of your new repositories, which will suppress this warning, call:\n"
+"\n"
+"\tgit config --global init.defaultBranch <name>\n"
+"\n"
+"Names commonly chosen instead of 'master' are 'main', 'trunk' and\n"
+"'development'. The just-created branch can be renamed via this command:\n"
+"\n"
+"\tgit branch -m <name>\n"
+);
+
+char *repo_default_branch_name(struct repository *r, int quiet)
{
const char *config_key = "init.defaultbranch";
const char *config_display_key = "init.defaultBranch";
char *ret = NULL, *full_ref;
+ const char *env = getenv("GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME");
- if (repo_config_get_string(r, config_key, &ret) < 0)
+ if (env && *env)
+ ret = xstrdup(env);
+ else if (repo_config_get_string(r, config_key, &ret) < 0)
die(_("could not retrieve `%s`"), config_display_key);
- if (!ret)
+ if (!ret) {
ret = xstrdup("master");
+ if (!quiet)
+ advise(_(default_branch_name_advice), ret);
+ }
full_ref = xstrfmt("refs/heads/%s", ret);
if (check_refname_format(full_ref, 0))
@@ -582,12 +711,12 @@ char *repo_default_branch_name(struct repository *r)
return ret;
}
-const char *git_default_branch_name(void)
+const char *git_default_branch_name(int quiet)
{
static char *ret;
if (!ret)
- ret = repo_default_branch_name(the_repository);
+ ret = repo_default_branch_name(the_repository, quiet);
return ret;
}
@@ -598,10 +727,14 @@ const char *git_default_branch_name(void)
* to name a branch.
*/
static char *substitute_branch_name(struct repository *r,
- const char **string, int *len)
+ const char **string, int *len,
+ int nonfatal_dangling_mark)
{
struct strbuf buf = STRBUF_INIT;
- int ret = repo_interpret_branch_name(r, *string, *len, &buf, 0);
+ struct interpret_branch_name_options options = {
+ .nonfatal_dangling_mark = nonfatal_dangling_mark
+ };
+ int ret = repo_interpret_branch_name(r, *string, *len, &buf, &options);
if (ret == *len) {
size_t size;
@@ -614,19 +747,15 @@ static char *substitute_branch_name(struct repository *r,
}
int repo_dwim_ref(struct repository *r, const char *str, int len,
- struct object_id *oid, char **ref)
+ struct object_id *oid, char **ref, int nonfatal_dangling_mark)
{
- char *last_branch = substitute_branch_name(r, &str, &len);
+ char *last_branch = substitute_branch_name(r, &str, &len,
+ nonfatal_dangling_mark);
int refs_found = expand_ref(r, str, len, oid, ref);
free(last_branch);
return refs_found;
}
-int dwim_ref(const char *str, int len, struct object_id *oid, char **ref)
-{
- return repo_dwim_ref(the_repository, str, len, oid, ref);
-}
-
int expand_ref(struct repository *repo, const char *str, int len,
struct object_id *oid, char **ref)
{
@@ -639,12 +768,13 @@ int expand_ref(struct repository *repo, const char *str, int len,
struct object_id oid_from_ref;
struct object_id *this_result;
int flag;
+ struct ref_store *refs = get_main_ref_store(repo);
this_result = refs_found ? &oid_from_ref : oid;
strbuf_reset(&fullref);
strbuf_addf(&fullref, *p, len, str);
- r = refs_resolve_ref_unsafe(get_main_ref_store(repo),
- fullref.buf, RESOLVE_REF_READING,
+ r = refs_resolve_ref_unsafe(refs, fullref.buf,
+ RESOLVE_REF_READING,
this_result, &flag);
if (r) {
if (!refs_found++)
@@ -665,7 +795,7 @@ int repo_dwim_log(struct repository *r, const char *str, int len,
struct object_id *oid, char **log)
{
struct ref_store *refs = get_main_ref_store(r);
- char *last_branch = substitute_branch_name(r, &str, &len);
+ char *last_branch = substitute_branch_name(r, &str, &len, 0);
const char **p;
int logs_found = 0;
struct strbuf path = STRBUF_INIT;
@@ -679,7 +809,7 @@ int repo_dwim_log(struct repository *r, const char *str, int len,
strbuf_addf(&path, *p, len, str);
ref = refs_resolve_ref_unsafe(refs, path.buf,
RESOLVE_REF_READING,
- &hash, NULL);
+ oid ? &hash : NULL, NULL);
if (!ref)
continue;
if (refs_reflog_exists(refs, path.buf))
@@ -691,7 +821,8 @@ int repo_dwim_log(struct repository *r, const char *str, int len,
continue;
if (!logs_found++) {
*log = xstrdup(it);
- oidcpy(oid, &hash);
+ if (oid)
+ oidcpy(oid, &hash);
}
if (!warn_ambiguous_refs)
break;
@@ -706,12 +837,11 @@ int dwim_log(const char *str, int len, struct object_id *oid, char **log)
return repo_dwim_log(the_repository, str, len, oid, log);
}
-static int is_per_worktree_ref(const char *refname)
+int is_per_worktree_ref(const char *refname)
{
- return !strcmp(refname, "HEAD") ||
- starts_with(refname, "refs/worktree/") ||
- starts_with(refname, "refs/bisect/") ||
- starts_with(refname, "refs/rewritten/");
+ return starts_with(refname, "refs/worktree/") ||
+ starts_with(refname, "refs/bisect/") ||
+ starts_with(refname, "refs/rewritten/");
}
static int is_pseudoref_syntax(const char *refname)
@@ -723,148 +853,119 @@ static int is_pseudoref_syntax(const char *refname)
return 0;
}
+ /*
+ * HEAD is not a pseudoref, but it certainly uses the
+ * pseudoref syntax.
+ */
return 1;
}
-static int is_main_pseudoref_syntax(const char *refname)
+int is_pseudoref(struct ref_store *refs, const char *refname)
{
- return skip_prefix(refname, "main-worktree/", &refname) &&
- *refname &&
- is_pseudoref_syntax(refname);
-}
+ static const char *const irregular_pseudorefs[] = {
+ "AUTO_MERGE",
+ "BISECT_EXPECTED_REV",
+ "NOTES_MERGE_PARTIAL",
+ "NOTES_MERGE_REF",
+ "MERGE_AUTOSTASH",
+ };
+ struct object_id oid;
+ size_t i;
-static int is_other_pseudoref_syntax(const char *refname)
-{
- if (!skip_prefix(refname, "worktrees/", &refname))
- return 0;
- refname = strchr(refname, '/');
- if (!refname || !refname[1])
+ if (!is_pseudoref_syntax(refname))
return 0;
- return is_pseudoref_syntax(refname + 1);
-}
-enum ref_type ref_type(const char *refname)
-{
- if (is_per_worktree_ref(refname))
- return REF_TYPE_PER_WORKTREE;
- if (is_pseudoref_syntax(refname))
- return REF_TYPE_PSEUDOREF;
- if (is_main_pseudoref_syntax(refname))
- return REF_TYPE_MAIN_PSEUDOREF;
- if (is_other_pseudoref_syntax(refname))
- return REF_TYPE_OTHER_PSEUDOREF;
- return REF_TYPE_NORMAL;
+ if (ends_with(refname, "_HEAD")) {
+ refs_resolve_ref_unsafe(refs, refname,
+ RESOLVE_REF_READING | RESOLVE_REF_NO_RECURSE,
+ &oid, NULL);
+ return !is_null_oid(&oid);
+ }
+
+ for (i = 0; i < ARRAY_SIZE(irregular_pseudorefs); i++)
+ if (!strcmp(refname, irregular_pseudorefs[i])) {
+ refs_resolve_ref_unsafe(refs, refname,
+ RESOLVE_REF_READING | RESOLVE_REF_NO_RECURSE,
+ &oid, NULL);
+ return !is_null_oid(&oid);
+ }
+
+ return 0;
}
-long get_files_ref_lock_timeout_ms(void)
+int is_headref(struct ref_store *refs, const char *refname)
{
- static int configured = 0;
-
- /* The default timeout is 100 ms: */
- static int timeout_ms = 100;
+ if (!strcmp(refname, "HEAD"))
+ return refs_ref_exists(refs, refname);
- if (!configured) {
- git_config_get_int("core.filesreflocktimeout", &timeout_ms);
- configured = 1;
- }
+ return 0;
+}
- return timeout_ms;
+static int is_current_worktree_ref(const char *ref) {
+ return is_pseudoref_syntax(ref) || is_per_worktree_ref(ref);
}
-static int write_pseudoref(const char *pseudoref, const struct object_id *oid,
- const struct object_id *old_oid, struct strbuf *err)
+enum ref_worktree_type parse_worktree_ref(const char *maybe_worktree_ref,
+ const char **worktree_name, int *worktree_name_length,
+ const char **bare_refname)
{
- const char *filename;
- int fd;
- struct lock_file lock = LOCK_INIT;
- struct strbuf buf = STRBUF_INIT;
- int ret = -1;
+ const char *name_dummy;
+ int name_length_dummy;
+ const char *ref_dummy;
- if (!oid)
- return 0;
+ if (!worktree_name)
+ worktree_name = &name_dummy;
+ if (!worktree_name_length)
+ worktree_name_length = &name_length_dummy;
+ if (!bare_refname)
+ bare_refname = &ref_dummy;
- strbuf_addf(&buf, "%s\n", oid_to_hex(oid));
-
- filename = git_path("%s", pseudoref);
- fd = hold_lock_file_for_update_timeout(&lock, filename, 0,
- get_files_ref_lock_timeout_ms());
- if (fd < 0) {
- strbuf_addf(err, _("could not open '%s' for writing: %s"),
- filename, strerror(errno));
- goto done;
- }
+ if (skip_prefix(maybe_worktree_ref, "worktrees/", bare_refname)) {
+ const char *slash = strchr(*bare_refname, '/');
- if (old_oid) {
- struct object_id actual_old_oid;
+ *worktree_name = *bare_refname;
+ if (!slash) {
+ *worktree_name_length = strlen(*worktree_name);
- if (read_ref(pseudoref, &actual_old_oid)) {
- if (!is_null_oid(old_oid)) {
- strbuf_addf(err, _("could not read ref '%s'"),
- pseudoref);
- rollback_lock_file(&lock);
- goto done;
- }
- } else if (is_null_oid(old_oid)) {
- strbuf_addf(err, _("ref '%s' already exists"),
- pseudoref);
- rollback_lock_file(&lock);
- goto done;
- } else if (!oideq(&actual_old_oid, old_oid)) {
- strbuf_addf(err, _("unexpected object ID when writing '%s'"),
- pseudoref);
- rollback_lock_file(&lock);
- goto done;
+ /* This is an error condition, and the caller tell because the bare_refname is "" */
+ *bare_refname = *worktree_name + *worktree_name_length;
+ return REF_WORKTREE_OTHER;
}
- }
- if (write_in_full(fd, buf.buf, buf.len) < 0) {
- strbuf_addf(err, _("could not write to '%s'"), filename);
- rollback_lock_file(&lock);
- goto done;
+ *worktree_name_length = slash - *bare_refname;
+ *bare_refname = slash + 1;
+
+ if (is_current_worktree_ref(*bare_refname))
+ return REF_WORKTREE_OTHER;
}
- commit_lock_file(&lock);
- ret = 0;
-done:
- strbuf_release(&buf);
- return ret;
-}
+ *worktree_name = NULL;
+ *worktree_name_length = 0;
-static int delete_pseudoref(const char *pseudoref, const struct object_id *old_oid)
-{
- const char *filename;
+ if (skip_prefix(maybe_worktree_ref, "main-worktree/", bare_refname)
+ && is_current_worktree_ref(*bare_refname))
+ return REF_WORKTREE_MAIN;
- filename = git_path("%s", pseudoref);
+ *bare_refname = maybe_worktree_ref;
+ if (is_current_worktree_ref(maybe_worktree_ref))
+ return REF_WORKTREE_CURRENT;
- if (old_oid && !is_null_oid(old_oid)) {
- struct lock_file lock = LOCK_INIT;
- int fd;
- struct object_id actual_old_oid;
+ return REF_WORKTREE_SHARED;
+}
- fd = hold_lock_file_for_update_timeout(
- &lock, filename, 0,
- get_files_ref_lock_timeout_ms());
- if (fd < 0) {
- error_errno(_("could not open '%s' for writing"),
- filename);
- return -1;
- }
- if (read_ref(pseudoref, &actual_old_oid))
- die(_("could not read ref '%s'"), pseudoref);
- if (!oideq(&actual_old_oid, old_oid)) {
- error(_("unexpected object ID when deleting '%s'"),
- pseudoref);
- rollback_lock_file(&lock);
- return -1;
- }
+long get_files_ref_lock_timeout_ms(void)
+{
+ static int configured = 0;
+
+ /* The default timeout is 100 ms: */
+ static int timeout_ms = 100;
- unlink(filename);
- rollback_lock_file(&lock);
- } else {
- unlink(filename);
+ if (!configured) {
+ git_config_get_int("core.filesreflocktimeout", &timeout_ms);
+ configured = 1;
}
- return 0;
+ return timeout_ms;
}
int refs_delete_ref(struct ref_store *refs, const char *msg,
@@ -875,11 +976,6 @@ int refs_delete_ref(struct ref_store *refs, const char *msg,
struct ref_transaction *transaction;
struct strbuf err = STRBUF_INIT;
- if (ref_type(refname) == REF_TYPE_PSEUDOREF) {
- assert(refs == get_main_ref_store(the_repository));
- return delete_pseudoref(refname, old_oid);
- }
-
transaction = ref_store_transaction_begin(refs, &err);
if (!transaction ||
ref_transaction_delete(transaction, refname, old_oid,
@@ -902,12 +998,11 @@ int delete_ref(const char *msg, const char *refname,
old_oid, flags);
}
-void copy_reflog_msg(struct strbuf *sb, const char *msg)
+static void copy_reflog_msg(struct strbuf *sb, const char *msg)
{
char c;
int wasspace = 1;
- strbuf_addch(sb, '\t');
while ((c = *msg++)) {
if (wasspace && isspace(c))
continue;
@@ -919,6 +1014,15 @@ void copy_reflog_msg(struct strbuf *sb, const char *msg)
strbuf_rtrim(sb);
}
+static char *normalize_reflog_message(const char *msg)
+{
+ struct strbuf sb = STRBUF_INIT;
+
+ if (msg && *msg)
+ copy_reflog_msg(&sb, msg);
+ return strbuf_detach(&sb, NULL);
+}
+
int should_autocreate_reflog(const char *refname)
{
switch (log_all_ref_updates) {
@@ -957,25 +1061,31 @@ struct read_ref_at_cb {
int *cutoff_cnt;
};
+static void set_read_ref_cutoffs(struct read_ref_at_cb *cb,
+ timestamp_t timestamp, int tz, const char *message)
+{
+ if (cb->msg)
+ *cb->msg = xstrdup(message);
+ if (cb->cutoff_time)
+ *cb->cutoff_time = timestamp;
+ if (cb->cutoff_tz)
+ *cb->cutoff_tz = tz;
+ if (cb->cutoff_cnt)
+ *cb->cutoff_cnt = cb->reccnt;
+}
+
static int read_ref_at_ent(struct object_id *ooid, struct object_id *noid,
- const char *email, timestamp_t timestamp, int tz,
- const char *message, void *cb_data)
+ const char *email UNUSED,
+ timestamp_t timestamp, int tz,
+ const char *message, void *cb_data)
{
struct read_ref_at_cb *cb = cb_data;
- cb->reccnt++;
cb->tz = tz;
cb->date = timestamp;
if (timestamp <= cb->at_time || cb->cnt == 0) {
- if (cb->msg)
- *cb->msg = xstrdup(message);
- if (cb->cutoff_time)
- *cb->cutoff_time = timestamp;
- if (cb->cutoff_tz)
- *cb->cutoff_tz = tz;
- if (cb->cutoff_cnt)
- *cb->cutoff_cnt = cb->reccnt - 1;
+ set_read_ref_cutoffs(cb, timestamp, tz, message);
/*
* we have not yet updated cb->[n|o]oid so they still
* hold the values for the previous record.
@@ -992,11 +1102,13 @@ static int read_ref_at_ent(struct object_id *ooid, struct object_id *noid,
warning(_("log for ref %s unexpectedly ended on %s"),
cb->refname, show_date(cb->date, cb->tz,
DATE_MODE(RFC2822)));
+ cb->reccnt++;
oidcpy(&cb->ooid, ooid);
oidcpy(&cb->noid, noid);
cb->found_it = 1;
return 1;
}
+ cb->reccnt++;
oidcpy(&cb->ooid, ooid);
oidcpy(&cb->noid, noid);
if (cb->cnt > 0)
@@ -1005,21 +1117,15 @@ static int read_ref_at_ent(struct object_id *ooid, struct object_id *noid,
}
static int read_ref_at_ent_oldest(struct object_id *ooid, struct object_id *noid,
- const char *email, timestamp_t timestamp,
- int tz, const char *message, void *cb_data)
+ const char *email UNUSED,
+ timestamp_t timestamp, int tz,
+ const char *message, void *cb_data)
{
struct read_ref_at_cb *cb = cb_data;
- if (cb->msg)
- *cb->msg = xstrdup(message);
- if (cb->cutoff_time)
- *cb->cutoff_time = timestamp;
- if (cb->cutoff_tz)
- *cb->cutoff_tz = tz;
- if (cb->cutoff_cnt)
- *cb->cutoff_cnt = cb->reccnt;
+ set_read_ref_cutoffs(cb, timestamp, tz, message);
oidcpy(cb->oid, ooid);
- if (is_null_oid(cb->oid))
+ if (cb->at_time && is_null_oid(cb->oid))
oidcpy(cb->oid, noid);
/* We just want the first entry */
return 1;
@@ -1045,6 +1151,21 @@ int read_ref_at(struct ref_store *refs, const char *refname,
refs_for_each_reflog_ent_reverse(refs, refname, read_ref_at_ent, &cb);
if (!cb.reccnt) {
+ if (cnt == 0) {
+ /*
+ * The caller asked for ref@{0}, and we had no entries.
+ * It's a bit subtle, but in practice all callers have
+ * prepped the "oid" field with the current value of
+ * the ref, which is the most reasonable fallback.
+ *
+ * We'll put dummy values into the out-parameters (so
+ * they're not just uninitialized garbage), and the
+ * caller can take our return value as a hint that
+ * we did not find any such reflog.
+ */
+ set_read_ref_cutoffs(&cb, 0, 0, "empty reflog");
+ return 1;
+ }
if (flags & GET_OID_QUIETLY)
exit(128);
else
@@ -1064,7 +1185,7 @@ struct ref_transaction *ref_store_transaction_begin(struct ref_store *refs,
struct ref_transaction *tr;
assert(err);
- tr = xcalloc(1, sizeof(struct ref_transaction));
+ CALLOC_ARRAY(tr, 1);
tr->ref_store = refs;
return tr;
}
@@ -1124,7 +1245,7 @@ struct ref_update *ref_transaction_add_update(
oidcpy(&update->new_oid, new_oid);
if (flags & REF_HAVE_OLD)
oidcpy(&update->old_oid, old_oid);
- update->msg = xstrdup_or_null(msg);
+ update->msg = normalize_reflog_message(msg);
return update;
}
@@ -1137,9 +1258,10 @@ int ref_transaction_update(struct ref_transaction *transaction,
{
assert(err);
- if ((new_oid && !is_null_oid(new_oid)) ?
- check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) :
- !refname_is_safe(refname)) {
+ if (!(flags & REF_SKIP_REFNAME_VERIFICATION) &&
+ ((new_oid && !is_null_oid(new_oid)) ?
+ check_refname_format(refname, REFNAME_ALLOW_ONELEVEL) :
+ !refname_is_safe(refname))) {
strbuf_addf(err, _("refusing to update ref with bad name '%s'"),
refname);
return -1;
@@ -1148,6 +1270,13 @@ int ref_transaction_update(struct ref_transaction *transaction,
if (flags & ~REF_TRANSACTION_UPDATE_ALLOWED_FLAGS)
BUG("illegal flags 0x%x passed to ref_transaction_update()", flags);
+ /*
+ * Clear flags outside the allowed set; this should be a noop because
+ * of the BUG() check above, but it works around a -Wnonnull warning
+ * with some versions of "gcc -O3".
+ */
+ flags &= REF_TRANSACTION_UPDATE_ALLOWED_FLAGS;
+
flags |= (new_oid ? REF_HAVE_NEW : 0) | (old_oid ? REF_HAVE_OLD : 0);
ref_transaction_add_update(transaction, refname, flags,
@@ -1161,10 +1290,12 @@ int ref_transaction_create(struct ref_transaction *transaction,
unsigned int flags, const char *msg,
struct strbuf *err)
{
- if (!new_oid || is_null_oid(new_oid))
- BUG("create called without valid new_oid");
+ if (!new_oid || is_null_oid(new_oid)) {
+ strbuf_addf(err, "'%s' has a null OID", refname);
+ return 1;
+ }
return ref_transaction_update(transaction, refname, new_oid,
- &null_oid, flags, msg, err);
+ null_oid(), flags, msg, err);
}
int ref_transaction_delete(struct ref_transaction *transaction,
@@ -1176,7 +1307,7 @@ int ref_transaction_delete(struct ref_transaction *transaction,
if (old_oid && is_null_oid(old_oid))
BUG("delete called with old_oid set to zeros");
return ref_transaction_update(transaction, refname,
- &null_oid, old_oid,
+ null_oid(), old_oid,
flags, msg, err);
}
@@ -1202,18 +1333,13 @@ int refs_update_ref(struct ref_store *refs, const char *msg,
struct strbuf err = STRBUF_INIT;
int ret = 0;
- if (ref_type(refname) == REF_TYPE_PSEUDOREF) {
- assert(refs == get_main_ref_store(the_repository));
- ret = write_pseudoref(refname, new_oid, old_oid, &err);
- } else {
- t = ref_store_transaction_begin(refs, &err);
- if (!t ||
- ref_transaction_update(t, refname, new_oid, old_oid,
- flags, msg, &err) ||
- ref_transaction_commit(t, &err)) {
- ret = 1;
- ref_transaction_free(t);
- }
+ t = ref_store_transaction_begin(refs, &err);
+ if (!t ||
+ ref_transaction_update(t, refname, new_oid, old_oid, flags, msg,
+ &err) ||
+ ref_transaction_commit(t, &err)) {
+ ret = 1;
+ ref_transaction_free(t);
}
if (ret) {
const char *str = _("update_ref failed for ref '%s': %s");
@@ -1246,65 +1372,68 @@ int update_ref(const char *msg, const char *refname,
old_oid, flags, onerr);
}
+/*
+ * Check that the string refname matches a rule of the form
+ * "{prefix}%.*s{suffix}". So "foo/bar/baz" would match the rule
+ * "foo/%.*s/baz", and return the string "bar".
+ */
+static const char *match_parse_rule(const char *refname, const char *rule,
+ size_t *len)
+{
+ /*
+ * Check that rule matches refname up to the first percent in the rule.
+ * We can bail immediately if not, but otherwise we leave "rule" at the
+ * %-placeholder, and "refname" at the start of the potential matched
+ * name.
+ */
+ while (*rule != '%') {
+ if (!*rule)
+ BUG("rev-parse rule did not have percent");
+ if (*refname++ != *rule++)
+ return NULL;
+ }
+
+ /*
+ * Check that our "%" is the expected placeholder. This assumes there
+ * are no other percents (placeholder or quoted) in the string, but
+ * that is sufficient for our rev-parse rules.
+ */
+ if (!skip_prefix(rule, "%.*s", &rule))
+ return NULL;
+
+ /*
+ * And now check that our suffix (if any) matches.
+ */
+ if (!strip_suffix(refname, rule, len))
+ return NULL;
+
+ return refname; /* len set by strip_suffix() */
+}
+
char *refs_shorten_unambiguous_ref(struct ref_store *refs,
const char *refname, int strict)
{
int i;
- static char **scanf_fmts;
- static int nr_rules;
- char *short_name;
struct strbuf resolved_buf = STRBUF_INIT;
- if (!nr_rules) {
- /*
- * Pre-generate scanf formats from ref_rev_parse_rules[].
- * Generate a format suitable for scanf from a
- * ref_rev_parse_rules rule by interpolating "%s" at the
- * location of the "%.*s".
- */
- size_t total_len = 0;
- size_t offset = 0;
-
- /* the rule list is NULL terminated, count them first */
- for (nr_rules = 0; ref_rev_parse_rules[nr_rules]; nr_rules++)
- /* -2 for strlen("%.*s") - strlen("%s"); +1 for NUL */
- total_len += strlen(ref_rev_parse_rules[nr_rules]) - 2 + 1;
-
- scanf_fmts = xmalloc(st_add(st_mult(sizeof(char *), nr_rules), total_len));
-
- offset = 0;
- for (i = 0; i < nr_rules; i++) {
- assert(offset < total_len);
- scanf_fmts[i] = (char *)&scanf_fmts[nr_rules] + offset;
- offset += xsnprintf(scanf_fmts[i], total_len - offset,
- ref_rev_parse_rules[i], 2, "%s") + 1;
- }
- }
-
- /* bail out if there are no rules */
- if (!nr_rules)
- return xstrdup(refname);
-
- /* buffer for scanf result, at most refname must fit */
- short_name = xstrdup(refname);
-
/* skip first rule, it will always match */
- for (i = nr_rules - 1; i > 0 ; --i) {
+ for (i = NUM_REV_PARSE_RULES - 1; i > 0 ; --i) {
int j;
int rules_to_fail = i;
- int short_name_len;
+ const char *short_name;
+ size_t short_name_len;
- if (1 != sscanf(refname, scanf_fmts[i], short_name))
+ short_name = match_parse_rule(refname, ref_rev_parse_rules[i],
+ &short_name_len);
+ if (!short_name)
continue;
- short_name_len = strlen(short_name);
-
/*
* in strict mode, all (except the matched one) rules
* must fail to resolve to a valid non-ambiguous ref
*/
if (strict)
- rules_to_fail = nr_rules;
+ rules_to_fail = NUM_REV_PARSE_RULES;
/*
* check if the short name resolves to a valid ref,
@@ -1324,7 +1453,8 @@ char *refs_shorten_unambiguous_ref(struct ref_store *refs,
*/
strbuf_reset(&resolved_buf);
strbuf_addf(&resolved_buf, rule,
- short_name_len, short_name);
+ cast_size_t_to_int(short_name_len),
+ short_name);
if (refs_ref_exists(refs, resolved_buf.buf))
break;
}
@@ -1335,12 +1465,11 @@ char *refs_shorten_unambiguous_ref(struct ref_store *refs,
*/
if (j == rules_to_fail) {
strbuf_release(&resolved_buf);
- return short_name;
+ return xmemdupz(short_name, short_name_len);
}
}
strbuf_release(&resolved_buf);
- free(short_name);
return xstrdup(refname);
}
@@ -1350,9 +1479,8 @@ char *shorten_unambiguous_ref(const char *refname, int strict)
refname, strict);
}
-static struct string_list *hide_refs;
-
-int parse_hide_refs_config(const char *var, const char *value, const char *section)
+int parse_hide_refs_config(const char *var, const char *value, const char *section,
+ struct strvec *hide_refs)
{
const char *key;
if (!strcmp("transfer.hiderefs", var) ||
@@ -1363,27 +1491,23 @@ int parse_hide_refs_config(const char *var, const char *value, const char *secti
if (!value)
return config_error_nonbool(var);
- ref = xstrdup(value);
+
+ /* drop const to remove trailing '/' characters */
+ ref = (char *)strvec_push(hide_refs, value);
len = strlen(ref);
while (len && ref[len - 1] == '/')
ref[--len] = '\0';
- if (!hide_refs) {
- hide_refs = xcalloc(1, sizeof(*hide_refs));
- hide_refs->strdup_strings = 1;
- }
- string_list_append(hide_refs, ref);
}
return 0;
}
-int ref_is_hidden(const char *refname, const char *refname_full)
+int ref_is_hidden(const char *refname, const char *refname_full,
+ const struct strvec *hide_refs)
{
int i;
- if (!hide_refs)
- return 0;
for (i = hide_refs->nr - 1; i >= 0; i--) {
- const char *match = hide_refs->items[i].string;
+ const char *match = hide_refs->v[i];
const char *subject;
int neg = 0;
const char *p;
@@ -1409,6 +1533,30 @@ int ref_is_hidden(const char *refname, const char *refname_full)
return 0;
}
+const char **hidden_refs_to_excludes(const struct strvec *hide_refs)
+{
+ const char **pattern;
+ for (pattern = hide_refs->v; *pattern; pattern++) {
+ /*
+ * We can't feed any excludes from hidden refs config
+ * sections, since later rules may override previous
+ * ones. For example, with rules "refs/foo" and
+ * "!refs/foo/bar", we should show "refs/foo/bar" (and
+ * everything underneath it), but the earlier exclusion
+ * would cause us to skip all of "refs/foo". We
+ * likewise don't implement the namespace stripping
+ * required for '^' rules.
+ *
+ * Both are possible to do, but complicated, so avoid
+ * populating the jump list at all if we see either of
+ * these patterns.
+ */
+ if (**pattern == '!' || **pattern == '^')
+ return NULL;
+ }
+ return hide_refs->v;
+}
+
const char *find_descendant_ref(const char *dirname,
const struct string_list *extras,
const struct string_list *skip)
@@ -1437,32 +1585,13 @@ const char *find_descendant_ref(const char *dirname,
return NULL;
}
-int refs_rename_ref_available(struct ref_store *refs,
- const char *old_refname,
- const char *new_refname)
-{
- struct string_list skip = STRING_LIST_INIT_NODUP;
- struct strbuf err = STRBUF_INIT;
- int ok;
-
- string_list_insert(&skip, old_refname);
- ok = !refs_verify_refname_available(refs, new_refname,
- NULL, &skip, &err);
- if (!ok)
- error("%s", err.buf);
-
- string_list_clear(&skip, 0);
- strbuf_release(&err);
- return ok;
-}
-
int refs_head_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
{
struct object_id oid;
int flag;
- if (!refs_read_ref_full(refs, "HEAD", RESOLVE_REF_READING,
- &oid, &flag))
+ if (refs_resolve_ref_unsafe(refs, "HEAD", RESOLVE_REF_READING,
+ &oid, &flag))
return fn("HEAD", &oid, flag, cb_data);
return 0;
@@ -1475,17 +1604,25 @@ int head_ref(each_ref_fn fn, void *cb_data)
struct ref_iterator *refs_ref_iterator_begin(
struct ref_store *refs,
- const char *prefix, int trim, int flags)
+ const char *prefix,
+ const char **exclude_patterns,
+ int trim,
+ enum do_for_each_ref_flags flags)
{
struct ref_iterator *iter;
- if (ref_paranoia < 0)
- ref_paranoia = git_env_bool("GIT_REF_PARANOIA", 0);
- if (ref_paranoia)
- flags |= DO_FOR_EACH_INCLUDE_BROKEN;
+ if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) {
+ static int ref_paranoia = -1;
- iter = refs->be->iterator_begin(refs, prefix, flags);
+ if (ref_paranoia < 0)
+ ref_paranoia = git_env_bool("GIT_REF_PARANOIA", 1);
+ if (ref_paranoia) {
+ flags |= DO_FOR_EACH_INCLUDE_BROKEN;
+ flags |= DO_FOR_EACH_OMIT_DANGLING_SYMREFS;
+ }
+ }
+ iter = refs->be->iterator_begin(refs, prefix, exclude_patterns, flags);
/*
* `iterator_begin()` already takes care of prefix, but we
* might need to do some trimming:
@@ -1493,10 +1630,6 @@ struct ref_iterator *refs_ref_iterator_begin(
if (trim)
iter = prefix_ref_iterator_begin(iter, "", trim);
- /* Sanity check for subclasses: */
- if (!iter->ordered)
- BUG("reference iterator is not ordered");
-
return iter;
}
@@ -1519,7 +1652,7 @@ static int do_for_each_repo_ref(struct repository *r, const char *prefix,
if (!refs)
return 0;
- iter = refs_ref_iterator_begin(refs, prefix, trim, flags);
+ iter = refs_ref_iterator_begin(refs, prefix, NULL, trim, flags);
return do_for_each_repo_ref_iterator(r, iter, fn, cb_data);
}
@@ -1529,7 +1662,7 @@ struct do_for_each_ref_help {
void *cb_data;
};
-static int do_for_each_ref_helper(struct repository *r,
+static int do_for_each_ref_helper(struct repository *r UNUSED,
const char *refname,
const struct object_id *oid,
int flags,
@@ -1541,7 +1674,9 @@ static int do_for_each_ref_helper(struct repository *r,
}
static int do_for_each_ref(struct ref_store *refs, const char *prefix,
- each_ref_fn fn, int trim, int flags, void *cb_data)
+ const char **exclude_patterns,
+ each_ref_fn fn, int trim,
+ enum do_for_each_ref_flags flags, void *cb_data)
{
struct ref_iterator *iter;
struct do_for_each_ref_help hp = { fn, cb_data };
@@ -1549,7 +1684,8 @@ static int do_for_each_ref(struct ref_store *refs, const char *prefix,
if (!refs)
return 0;
- iter = refs_ref_iterator_begin(refs, prefix, trim, flags);
+ iter = refs_ref_iterator_begin(refs, prefix, exclude_patterns, trim,
+ flags);
return do_for_each_repo_ref_iterator(the_repository, iter,
do_for_each_ref_helper, &hp);
@@ -1557,7 +1693,7 @@ static int do_for_each_ref(struct ref_store *refs, const char *prefix,
int refs_for_each_ref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref(refs, "", fn, 0, 0, cb_data);
+ return do_for_each_ref(refs, "", NULL, fn, 0, 0, cb_data);
}
int for_each_ref(each_ref_fn fn, void *cb_data)
@@ -1568,7 +1704,7 @@ int for_each_ref(each_ref_fn fn, void *cb_data)
int refs_for_each_ref_in(struct ref_store *refs, const char *prefix,
each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref(refs, prefix, fn, strlen(prefix), 0, cb_data);
+ return do_for_each_ref(refs, prefix, NULL, fn, strlen(prefix), 0, cb_data);
}
int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data)
@@ -1576,48 +1712,42 @@ int for_each_ref_in(const char *prefix, each_ref_fn fn, void *cb_data)
return refs_for_each_ref_in(get_main_ref_store(the_repository), prefix, fn, cb_data);
}
-int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data, unsigned int broken)
+int for_each_fullref_in(const char *prefix, each_ref_fn fn, void *cb_data)
{
- unsigned int flag = 0;
-
- if (broken)
- flag = DO_FOR_EACH_INCLUDE_BROKEN;
return do_for_each_ref(get_main_ref_store(the_repository),
- prefix, fn, 0, flag, cb_data);
+ prefix, NULL, fn, 0, 0, cb_data);
}
int refs_for_each_fullref_in(struct ref_store *refs, const char *prefix,
- each_ref_fn fn, void *cb_data,
- unsigned int broken)
+ const char **exclude_patterns,
+ each_ref_fn fn, void *cb_data)
{
- unsigned int flag = 0;
-
- if (broken)
- flag = DO_FOR_EACH_INCLUDE_BROKEN;
- return do_for_each_ref(refs, prefix, fn, 0, flag, cb_data);
+ return do_for_each_ref(refs, prefix, exclude_patterns, fn, 0, 0, cb_data);
}
int for_each_replace_ref(struct repository *r, each_repo_ref_fn fn, void *cb_data)
{
+ const char *git_replace_ref_base = ref_namespace[NAMESPACE_REPLACE].ref;
return do_for_each_repo_ref(r, git_replace_ref_base, fn,
strlen(git_replace_ref_base),
DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
}
-int for_each_namespaced_ref(each_ref_fn fn, void *cb_data)
+int for_each_namespaced_ref(const char **exclude_patterns,
+ each_ref_fn fn, void *cb_data)
{
struct strbuf buf = STRBUF_INIT;
int ret;
strbuf_addf(&buf, "%srefs/", get_git_namespace());
ret = do_for_each_ref(get_main_ref_store(the_repository),
- buf.buf, fn, 0, 0, cb_data);
+ buf.buf, exclude_patterns, fn, 0, 0, cb_data);
strbuf_release(&buf);
return ret;
}
int refs_for_each_rawref(struct ref_store *refs, each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref(refs, "", fn, 0,
+ return do_for_each_ref(refs, "", NULL, fn, 0,
DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
}
@@ -1626,18 +1756,181 @@ int for_each_rawref(each_ref_fn fn, void *cb_data)
return refs_for_each_rawref(get_main_ref_store(the_repository), fn, cb_data);
}
-int refs_read_raw_ref(struct ref_store *ref_store,
- const char *refname, struct object_id *oid,
- struct strbuf *referent, unsigned int *type)
+int refs_for_each_include_root_refs(struct ref_store *refs, each_ref_fn fn,
+ void *cb_data)
+{
+ return do_for_each_ref(refs, "", NULL, fn, 0,
+ DO_FOR_EACH_INCLUDE_ROOT_REFS, cb_data);
+}
+
+static int qsort_strcmp(const void *va, const void *vb)
+{
+ const char *a = *(const char **)va;
+ const char *b = *(const char **)vb;
+
+ return strcmp(a, b);
+}
+
+static void find_longest_prefixes_1(struct string_list *out,
+ struct strbuf *prefix,
+ const char **patterns, size_t nr)
+{
+ size_t i;
+
+ for (i = 0; i < nr; i++) {
+ char c = patterns[i][prefix->len];
+ if (!c || is_glob_special(c)) {
+ string_list_append(out, prefix->buf);
+ return;
+ }
+ }
+
+ i = 0;
+ while (i < nr) {
+ size_t end;
+
+ /*
+ * Set "end" to the index of the element _after_ the last one
+ * in our group.
+ */
+ for (end = i + 1; end < nr; end++) {
+ if (patterns[i][prefix->len] != patterns[end][prefix->len])
+ break;
+ }
+
+ strbuf_addch(prefix, patterns[i][prefix->len]);
+ find_longest_prefixes_1(out, prefix, patterns + i, end - i);
+ strbuf_setlen(prefix, prefix->len - 1);
+
+ i = end;
+ }
+}
+
+static void find_longest_prefixes(struct string_list *out,
+ const char **patterns)
+{
+ struct strvec sorted = STRVEC_INIT;
+ struct strbuf prefix = STRBUF_INIT;
+
+ strvec_pushv(&sorted, patterns);
+ QSORT(sorted.v, sorted.nr, qsort_strcmp);
+
+ find_longest_prefixes_1(out, &prefix, sorted.v, sorted.nr);
+
+ strvec_clear(&sorted);
+ strbuf_release(&prefix);
+}
+
+int refs_for_each_fullref_in_prefixes(struct ref_store *ref_store,
+ const char *namespace,
+ const char **patterns,
+ const char **exclude_patterns,
+ each_ref_fn fn, void *cb_data)
+{
+ struct string_list prefixes = STRING_LIST_INIT_DUP;
+ struct string_list_item *prefix;
+ struct strbuf buf = STRBUF_INIT;
+ int ret = 0, namespace_len;
+
+ find_longest_prefixes(&prefixes, patterns);
+
+ if (namespace)
+ strbuf_addstr(&buf, namespace);
+ namespace_len = buf.len;
+
+ for_each_string_list_item(prefix, &prefixes) {
+ strbuf_addstr(&buf, prefix->string);
+ ret = refs_for_each_fullref_in(ref_store, buf.buf,
+ exclude_patterns, fn, cb_data);
+ if (ret)
+ break;
+ strbuf_setlen(&buf, namespace_len);
+ }
+
+ string_list_clear(&prefixes, 0);
+ strbuf_release(&buf);
+ return ret;
+}
+
+static int refs_read_special_head(struct ref_store *ref_store,
+ const char *refname, struct object_id *oid,
+ struct strbuf *referent, unsigned int *type,
+ int *failure_errno)
+{
+ struct strbuf full_path = STRBUF_INIT;
+ struct strbuf content = STRBUF_INIT;
+ int result = -1;
+ strbuf_addf(&full_path, "%s/%s", ref_store->gitdir, refname);
+
+ if (strbuf_read_file(&content, full_path.buf, 0) < 0) {
+ *failure_errno = errno;
+ goto done;
+ }
+
+ result = parse_loose_ref_contents(content.buf, oid, referent, type,
+ failure_errno);
+
+done:
+ strbuf_release(&full_path);
+ strbuf_release(&content);
+ return result;
+}
+
+static int is_special_ref(const char *refname)
+{
+ /*
+ * Special references are refs that have different semantics compared
+ * to "normal" refs. These refs can thus not be stored in the ref
+ * backend, but must always be accessed via the filesystem. The
+ * following refs are special:
+ *
+ * - FETCH_HEAD may contain multiple object IDs, and each one of them
+ * carries additional metadata like where it came from.
+ *
+ * - MERGE_HEAD may contain multiple object IDs when merging multiple
+ * heads.
+ *
+ * Reading, writing or deleting references must consistently go either
+ * through the filesystem (special refs) or through the reference
+ * backend (normal ones).
+ */
+ static const char * const special_refs[] = {
+ "FETCH_HEAD",
+ "MERGE_HEAD",
+ };
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(special_refs); i++)
+ if (!strcmp(refname, special_refs[i]))
+ return 1;
+
+ return 0;
+}
+
+int refs_read_raw_ref(struct ref_store *ref_store, const char *refname,
+ struct object_id *oid, struct strbuf *referent,
+ unsigned int *type, int *failure_errno)
+{
+ assert(failure_errno);
+ if (is_special_ref(refname))
+ return refs_read_special_head(ref_store, refname, oid, referent,
+ type, failure_errno);
+
+ return ref_store->be->read_raw_ref(ref_store, refname, oid, referent,
+ type, failure_errno);
+}
+
+int refs_read_symbolic_ref(struct ref_store *ref_store, const char *refname,
+ struct strbuf *referent)
{
- return ref_store->be->read_raw_ref(ref_store, refname, oid, referent, type);
+ return ref_store->be->read_symbolic_ref(ref_store, refname, referent);
}
-/* This function needs to return a meaningful errno on failure */
const char *refs_resolve_ref_unsafe(struct ref_store *refs,
const char *refname,
int resolve_flags,
- struct object_id *oid, int *flags)
+ struct object_id *oid,
+ int *flags)
{
static struct strbuf sb_refname = STRBUF_INIT;
struct object_id unused_oid;
@@ -1653,13 +1946,11 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) {
if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) ||
- !refname_is_safe(refname)) {
- errno = EINVAL;
+ !refname_is_safe(refname))
return NULL;
- }
/*
- * dwim_ref() uses REF_ISBROKEN to distinguish between
+ * repo_dwim_ref() uses REF_ISBROKEN to distinguish between
* missing refs and refs that were present but invalid,
* to complain about the latter to stderr.
*
@@ -1671,9 +1962,10 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
for (symref_count = 0; symref_count < SYMREF_MAXDEPTH; symref_count++) {
unsigned int read_flags = 0;
+ int failure_errno;
- if (refs_read_raw_ref(refs, refname,
- oid, &sb_refname, &read_flags)) {
+ if (refs_read_raw_ref(refs, refname, oid, &sb_refname,
+ &read_flags, &failure_errno)) {
*flags |= read_flags;
/* In reading mode, refs must eventually resolve */
@@ -1685,9 +1977,9 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
* may show errors besides ENOENT if there are
* similarly-named refs.
*/
- if (errno != ENOENT &&
- errno != EISDIR &&
- errno != ENOTDIR)
+ if (failure_errno != ENOENT &&
+ failure_errno != EISDIR &&
+ failure_errno != ENOTDIR)
return NULL;
oidclr(oid);
@@ -1713,25 +2005,20 @@ const char *refs_resolve_ref_unsafe(struct ref_store *refs,
}
if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL)) {
if (!(resolve_flags & RESOLVE_REF_ALLOW_BAD_NAME) ||
- !refname_is_safe(refname)) {
- errno = EINVAL;
+ !refname_is_safe(refname))
return NULL;
- }
*flags |= REF_ISBROKEN | REF_BAD_NAME;
}
}
- errno = ELOOP;
return NULL;
}
/* backend functions */
-int refs_init_db(struct strbuf *err)
+int refs_init_db(struct ref_store *refs, int flags, struct strbuf *err)
{
- struct ref_store *refs = get_main_ref_store(the_repository);
-
- return refs->be->init_db(refs, err);
+ return refs->be->init_db(refs, flags, err);
}
const char *resolve_ref_unsafe(const char *refname, int resolve_flags,
@@ -1768,7 +2055,7 @@ struct ref_store_hash_entry
char name[FLEX_ARRAY];
};
-static int ref_store_hash_cmp(const void *unused_cmp_data,
+static int ref_store_hash_cmp(const void *cmp_data UNUSED,
const struct hashmap_entry *eptr,
const struct hashmap_entry *entry_or_key,
const void *keydata)
@@ -1824,17 +2111,18 @@ static struct ref_store *lookup_ref_store_map(struct hashmap *map,
* Create, record, and return a ref_store instance for the specified
* gitdir.
*/
-static struct ref_store *ref_store_init(const char *gitdir,
+static struct ref_store *ref_store_init(struct repository *repo,
+ const char *gitdir,
unsigned int flags)
{
- const char *be_name = "files";
- struct ref_storage_be *be = find_ref_storage_backend(be_name);
+ const struct ref_storage_be *be;
struct ref_store *refs;
+ be = find_ref_storage_backend(repo->ref_storage_format);
if (!be)
- BUG("reference backend %s is unknown", be_name);
+ BUG("reference backend is unknown");
- refs = be->init(gitdir, flags);
+ refs = be->init(repo, gitdir, flags);
return refs;
}
@@ -1846,7 +2134,8 @@ struct ref_store *get_main_ref_store(struct repository *r)
if (!r->gitdir)
BUG("attempting to get main_ref_store outside of repository");
- r->refs_private = ref_store_init(r->gitdir, REF_STORE_ALL_CAPS);
+ r->refs_private = ref_store_init(r, r->gitdir, REF_STORE_ALL_CAPS);
+ r->refs_private = maybe_debug_wrap_ref_store(r->gitdir, r->refs_private);
return r->refs_private;
}
@@ -1875,6 +2164,7 @@ struct ref_store *get_submodule_ref_store(const char *submodule)
struct ref_store *refs;
char *to_free = NULL;
size_t len;
+ struct repository *subrepo;
if (!submodule)
return NULL;
@@ -1900,8 +2190,19 @@ struct ref_store *get_submodule_ref_store(const char *submodule)
if (submodule_to_gitdir(&submodule_sb, submodule))
goto done;
- /* assume that add_submodule_odb() has been called */
- refs = ref_store_init(submodule_sb.buf,
+ subrepo = xmalloc(sizeof(*subrepo));
+ /*
+ * NEEDSWORK: Make get_submodule_ref_store() work with arbitrary
+ * superprojects other than the_repository. This probably should be
+ * done by making it take a struct repository * parameter instead of a
+ * submodule path.
+ */
+ if (repo_submodule_init(subrepo, the_repository, submodule,
+ null_oid())) {
+ free(subrepo);
+ goto done;
+ }
+ refs = ref_store_init(subrepo, submodule_sb.buf,
REF_STORE_READ | REF_STORE_ODB);
register_ref_store_map(&submodule_ref_stores, "submodule",
refs, submodule);
@@ -1927,10 +2228,12 @@ struct ref_store *get_worktree_ref_store(const struct worktree *wt)
return refs;
if (wt->id)
- refs = ref_store_init(git_common_path("worktrees/%s", wt->id),
+ refs = ref_store_init(the_repository,
+ git_common_path("worktrees/%s", wt->id),
REF_STORE_ALL_CAPS);
else
- refs = ref_store_init(get_git_common_dir(),
+ refs = ref_store_init(the_repository,
+ get_git_common_dir(),
REF_STORE_ALL_CAPS);
if (refs)
@@ -1939,43 +2242,28 @@ struct ref_store *get_worktree_ref_store(const struct worktree *wt)
return refs;
}
-void base_ref_store_init(struct ref_store *refs,
- const struct ref_storage_be *be)
+void base_ref_store_init(struct ref_store *refs, struct repository *repo,
+ const char *path, const struct ref_storage_be *be)
{
refs->be = be;
+ refs->repo = repo;
+ refs->gitdir = xstrdup(path);
}
/* backend functions */
-int refs_pack_refs(struct ref_store *refs, unsigned int flags)
+int refs_pack_refs(struct ref_store *refs, struct pack_refs_opts *opts)
{
- return refs->be->pack_refs(refs, flags);
+ return refs->be->pack_refs(refs, opts);
}
-int refs_peel_ref(struct ref_store *refs, const char *refname,
- struct object_id *oid)
+int peel_iterated_oid(const struct object_id *base, struct object_id *peeled)
{
- int flag;
- struct object_id base;
-
- if (current_ref_iter && current_ref_iter->refname == refname) {
- struct object_id peeled;
+ if (current_ref_iter &&
+ (current_ref_iter->oid == base ||
+ oideq(current_ref_iter->oid, base)))
+ return ref_iterator_peel(current_ref_iter, peeled);
- if (ref_iterator_peel(current_ref_iter, &peeled))
- return -1;
- oidcpy(oid, &peeled);
- return 0;
- }
-
- if (refs_read_ref_full(refs, refname,
- RESOLVE_REF_READING, &base, &flag))
- return -1;
-
- return peel_object(&base, oid);
-}
-
-int peel_ref(const char *refname, struct object_id *oid)
-{
- return refs_peel_ref(get_main_ref_store(the_repository), refname, oid);
+ return peel_object(base, peeled) ? -1 : 0;
}
int refs_create_symref(struct ref_store *refs,
@@ -1983,9 +2271,14 @@ int refs_create_symref(struct ref_store *refs,
const char *refs_heads_master,
const char *logmsg)
{
- return refs->be->create_symref(refs, ref_target,
- refs_heads_master,
- logmsg);
+ char *msg;
+ int retval;
+
+ msg = normalize_reflog_message(logmsg);
+ retval = refs->be->create_symref(refs, ref_target, refs_heads_master,
+ msg);
+ free(msg);
+ return retval;
}
int create_symref(const char *ref_target, const char *refs_heads_master,
@@ -2018,26 +2311,19 @@ int ref_update_reject_duplicates(struct string_list *refnames,
return 0;
}
-static const char hook_not_found;
-static const char *hook;
-
static int run_transaction_hook(struct ref_transaction *transaction,
const char *state)
{
struct child_process proc = CHILD_PROCESS_INIT;
struct strbuf buf = STRBUF_INIT;
+ const char *hook;
int ret = 0, i;
- if (hook == &hook_not_found)
- return ret;
+ hook = find_hook("reference-transaction");
if (!hook)
- hook = find_hook("reference-transaction");
- if (!hook) {
- hook = &hook_not_found;
return ret;
- }
- argv_array_pushl(&proc.args, hook, state, NULL);
+ strvec_pushl(&proc.args, hook, state, NULL);
proc.in = -1;
proc.stdout_to_stderr = 1;
proc.trace2_hook_name = "reference-transaction";
@@ -2058,8 +2344,11 @@ static int run_transaction_hook(struct ref_transaction *transaction,
update->refname);
if (write_in_full(proc.in, buf.buf, buf.len) < 0) {
- if (errno != EPIPE)
+ if (errno != EPIPE) {
+ /* Don't leak errno outside this API */
+ errno = 0;
ret = -1;
+ }
break;
}
}
@@ -2093,7 +2382,7 @@ int ref_transaction_prepare(struct ref_transaction *transaction,
break;
}
- if (getenv(GIT_QUARANTINE_ENVIRONMENT)) {
+ if (refs->repo->objects->odb->disable_ref_updates) {
strbuf_addstr(err,
_("ref updates forbidden inside quarantine environment"));
return -1;
@@ -2194,6 +2483,13 @@ int refs_verify_refname_available(struct ref_store *refs,
strbuf_grow(&dirname, strlen(refname) + 1);
for (slash = strchr(refname, '/'); slash; slash = strchr(slash + 1, '/')) {
+ /*
+ * Just saying "Is a directory" when we e.g. can't
+ * lock some multi-level ref isn't very informative,
+ * the user won't be told *what* is a directory, so
+ * let's not use strerror() below.
+ */
+ int ignore_errno;
/* Expand dirname to the new prefix, not including the trailing slash: */
strbuf_add(&dirname, refname + dirname.len, slash - refname - dirname.len);
@@ -2205,7 +2501,8 @@ int refs_verify_refname_available(struct ref_store *refs,
if (skip && string_list_has_string(skip, dirname.buf))
continue;
- if (!refs_read_raw_ref(refs, dirname.buf, &oid, &referent, &type)) {
+ if (!refs_read_raw_ref(refs, dirname.buf, &oid, &referent,
+ &type, &ignore_errno)) {
strbuf_addf(err, _("'%s' exists; cannot create '%s'"),
dirname.buf, refname);
goto cleanup;
@@ -2229,7 +2526,7 @@ int refs_verify_refname_available(struct ref_store *refs,
strbuf_addstr(&dirname, refname + dirname.len);
strbuf_addch(&dirname, '/');
- iter = refs_ref_iterator_begin(refs, dirname.buf, 0,
+ iter = refs_ref_iterator_begin(refs, dirname.buf, NULL, 0,
DO_FOR_EACH_INCLUDE_BROKEN);
while ((ok = ref_iterator_advance(iter)) == ITER_OK) {
if (skip &&
@@ -2258,18 +2555,33 @@ cleanup:
return ret;
}
-int refs_for_each_reflog(struct ref_store *refs, each_ref_fn fn, void *cb_data)
+struct do_for_each_reflog_help {
+ each_reflog_fn *fn;
+ void *cb_data;
+};
+
+static int do_for_each_reflog_helper(struct repository *r UNUSED,
+ const char *refname,
+ const struct object_id *oid UNUSED,
+ int flags,
+ void *cb_data)
+{
+ struct do_for_each_reflog_help *hp = cb_data;
+ return hp->fn(refname, hp->cb_data);
+}
+
+int refs_for_each_reflog(struct ref_store *refs, each_reflog_fn fn, void *cb_data)
{
struct ref_iterator *iter;
- struct do_for_each_ref_help hp = { fn, cb_data };
+ struct do_for_each_reflog_help hp = { fn, cb_data };
iter = refs->be->reflog_iterator_begin(refs);
return do_for_each_repo_ref_iterator(the_repository, iter,
- do_for_each_ref_helper, &hp);
+ do_for_each_reflog_helper, &hp);
}
-int for_each_reflog(each_ref_fn fn, void *cb_data)
+int for_each_reflog(each_reflog_fn fn, void *cb_data)
{
return refs_for_each_reflog(get_main_ref_store(the_repository), fn, cb_data);
}
@@ -2314,16 +2626,15 @@ int reflog_exists(const char *refname)
}
int refs_create_reflog(struct ref_store *refs, const char *refname,
- int force_create, struct strbuf *err)
+ struct strbuf *err)
{
- return refs->be->create_reflog(refs, refname, force_create, err);
+ return refs->be->create_reflog(refs, refname, err);
}
-int safe_create_reflog(const char *refname, int force_create,
- struct strbuf *err)
+int safe_create_reflog(const char *refname, struct strbuf *err)
{
return refs_create_reflog(get_main_ref_store(the_repository), refname,
- force_create, err);
+ err);
}
int refs_delete_reflog(struct ref_store *refs, const char *refname)
@@ -2337,19 +2648,19 @@ int delete_reflog(const char *refname)
}
int refs_reflog_expire(struct ref_store *refs,
- const char *refname, const struct object_id *oid,
+ const char *refname,
unsigned int flags,
reflog_expiry_prepare_fn prepare_fn,
reflog_expiry_should_prune_fn should_prune_fn,
reflog_expiry_cleanup_fn cleanup_fn,
void *policy_cb_data)
{
- return refs->be->reflog_expire(refs, refname, oid, flags,
+ return refs->be->reflog_expire(refs, refname, flags,
prepare_fn, should_prune_fn,
cleanup_fn, policy_cb_data);
}
-int reflog_expire(const char *refname, const struct object_id *oid,
+int reflog_expire(const char *refname,
unsigned int flags,
reflog_expiry_prepare_fn prepare_fn,
reflog_expiry_should_prune_fn should_prune_fn,
@@ -2357,7 +2668,7 @@ int reflog_expire(const char *refname, const struct object_id *oid,
void *policy_cb_data)
{
return refs_reflog_expire(get_main_ref_store(the_repository),
- refname, oid, flags,
+ refname, flags,
prepare_fn, should_prune_fn,
cleanup_fn, policy_cb_data);
}
@@ -2370,10 +2681,74 @@ int initial_ref_transaction_commit(struct ref_transaction *transaction,
return refs->be->initial_transaction_commit(refs, transaction, err);
}
-int refs_delete_refs(struct ref_store *refs, const char *msg,
+void ref_transaction_for_each_queued_update(struct ref_transaction *transaction,
+ ref_transaction_for_each_queued_update_fn cb,
+ void *cb_data)
+{
+ int i;
+
+ for (i = 0; i < transaction->nr; i++) {
+ struct ref_update *update = transaction->updates[i];
+
+ cb(update->refname,
+ (update->flags & REF_HAVE_OLD) ? &update->old_oid : NULL,
+ (update->flags & REF_HAVE_NEW) ? &update->new_oid : NULL,
+ cb_data);
+ }
+}
+
+int refs_delete_refs(struct ref_store *refs, const char *logmsg,
struct string_list *refnames, unsigned int flags)
{
- return refs->be->delete_refs(refs, msg, refnames, flags);
+ struct ref_transaction *transaction;
+ struct strbuf err = STRBUF_INIT;
+ struct string_list_item *item;
+ int ret = 0, failures = 0;
+ char *msg;
+
+ if (!refnames->nr)
+ return 0;
+
+ msg = normalize_reflog_message(logmsg);
+
+ /*
+ * Since we don't check the references' old_oids, the
+ * individual updates can't fail, so we can pack all of the
+ * updates into a single transaction.
+ */
+ transaction = ref_store_transaction_begin(refs, &err);
+ if (!transaction) {
+ ret = error("%s", err.buf);
+ goto out;
+ }
+
+ for_each_string_list_item(item, refnames) {
+ ret = ref_transaction_delete(transaction, item->string,
+ NULL, flags, msg, &err);
+ if (ret) {
+ warning(_("could not delete reference %s: %s"),
+ item->string, err.buf);
+ strbuf_reset(&err);
+ failures = 1;
+ }
+ }
+
+ ret = ref_transaction_commit(transaction, &err);
+ if (ret) {
+ if (refnames->nr == 1)
+ error(_("could not delete reference %s: %s"),
+ refnames->items[0].string, err.buf);
+ else
+ error(_("could not delete references: %s"), err.buf);
+ }
+
+out:
+ if (!ret && failures)
+ ret = -1;
+ ref_transaction_free(transaction);
+ strbuf_release(&err);
+ free(msg);
+ return ret;
}
int delete_refs(const char *msg, struct string_list *refnames,
@@ -2385,7 +2760,13 @@ int delete_refs(const char *msg, struct string_list *refnames,
int refs_rename_ref(struct ref_store *refs, const char *oldref,
const char *newref, const char *logmsg)
{
- return refs->be->rename_ref(refs, oldref, newref, logmsg);
+ char *msg;
+ int retval;
+
+ msg = normalize_reflog_message(logmsg);
+ retval = refs->be->rename_ref(refs, oldref, newref, msg);
+ free(msg);
+ return retval;
}
int rename_ref(const char *oldref, const char *newref, const char *logmsg)
@@ -2396,7 +2777,13 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg)
int refs_copy_existing_ref(struct ref_store *refs, const char *oldref,
const char *newref, const char *logmsg)
{
- return refs->be->copy_ref(refs, oldref, newref, logmsg);
+ char *msg;
+ int retval;
+
+ msg = normalize_reflog_message(logmsg);
+ retval = refs->be->copy_ref(refs, oldref, newref, msg);
+ free(msg);
+ return retval;
}
int copy_existing_ref(const char *oldref, const char *newref, const char *logmsg)
generated by cgit v0.10.2-6-g49f6 at 2024-04-19 10:25:00 (GMT)