*/
#include "cache.h"
+ #include "refs.h"
#include "builtin.h"
#include "blob.h"
#include "commit.h"
blank_boundary = git_config_bool(var, value);
return 0;
}
+ if (!strcmp(var, "blame.showemail")) {
+ int *output_option = cb;
+ if (git_config_bool(var, value))
+ *output_option |= OUTPUT_SHOW_EMAIL;
+ else
+ *output_option &= ~OUTPUT_SHOW_EMAIL;
+ return 0;
+ }
if (!strcmp(var, "blame.date")) {
if (!value)
return config_error_nonbool(var);
unsigned int range_i;
long anchor;
- git_config(git_blame_config, NULL);
+ git_config(git_blame_config, &output_option);
init_revisions(&revs, NULL);
revs.date_mode = blame_date_mode;
DIFF_OPT_SET(&revs.diffopt, ALLOW_TEXTCONV);
static char *guess_dir_name(const char *repo, int is_bundle, int is_bare)
{
const char *end = repo + strlen(repo), *start;
+ size_t len;
char *dir;
/*
/*
* Strip .{bundle,git}.
*/
- if (is_bundle) {
- if (end - start > 7 && !strncmp(end - 7, ".bundle", 7))
- end -= 7;
- } else {
- if (end - start > 4 && !strncmp(end - 4, ".git", 4))
- end -= 4;
- }
+ strip_suffix(start, is_bundle ? ".bundle" : ".git" , &len);
- if (is_bare) {
- struct strbuf result = STRBUF_INIT;
- strbuf_addf(&result, "%.*s.git", (int)(end - start), start);
- dir = strbuf_detach(&result, NULL);
- } else
- dir = xstrndup(start, end - start);
+ if (is_bare)
+ dir = xstrfmt("%.*s.git", (int)len, start);
+ else
+ dir = xstrndup(start, len);
/*
* Replace sequences of 'control' characters and whitespace
* with one ascii space, remove leading and trailing spaces.
{
const struct ref *r;
- lock_packed_refs(LOCK_DIE_ON_ERROR);
+ struct ref_transaction *t;
+ struct strbuf err = STRBUF_INIT;
+
+ t = ref_transaction_begin(&err);
+ if (!t)
+ die("%s", err.buf);
for (r = local_refs; r; r = r->next) {
if (!r->peer_ref)
continue;
- add_packed_ref(r->peer_ref->name, r->old_sha1);
+ if (ref_transaction_create(t, r->peer_ref->name, r->old_sha1,
+ 0, NULL, &err))
+ die("%s", err.buf);
}
- if (commit_packed_refs())
- die_errno("unable to overwrite old ref-pack file");
+ if (initial_ref_transaction_commit(t, &err))
+ die("%s", err.buf);
+
+ strbuf_release(&err);
+ ref_transaction_free(t);
}
static void write_followtags(const struct ref *refs, const char *msg)
* 2006 Junio Hamano
*/
#include "cache.h"
+ #include "refs.h"
#include "color.h"
#include "commit.h"
#include "diff.h"
static void get_patch_ids(struct rev_info *rev, struct patch_ids *ids)
{
struct rev_info check_rev;
- struct commit *commit;
+ struct commit *commit, *c1, *c2;
struct object *o1, *o2;
unsigned flags1, flags2;
die(_("Need exactly one range."));
o1 = rev->pending.objects[0].item;
- flags1 = o1->flags;
o2 = rev->pending.objects[1].item;
+ flags1 = o1->flags;
flags2 = o2->flags;
+ c1 = lookup_commit_reference(o1->sha1);
+ c2 = lookup_commit_reference(o2->sha1);
if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
die(_("Not a range."));
}
/* reset for next revision walk */
- clear_commit_marks((struct commit *)o1,
- SEEN | UNINTERESTING | SHOWN | ADDED);
- clear_commit_marks((struct commit *)o2,
- SEEN | UNINTERESTING | SHOWN | ADDED);
+ clear_commit_marks(c1, SEEN | UNINTERESTING | SHOWN | ADDED);
+ clear_commit_marks(c2, SEEN | UNINTERESTING | SHOWN | ADDED);
o1->flags = flags1;
o2->flags = flags2;
}
#define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
#define CEILING_DIRECTORIES_ENVIRONMENT "GIT_CEILING_DIRECTORIES"
#define NO_REPLACE_OBJECTS_ENVIRONMENT "GIT_NO_REPLACE_OBJECTS"
+#define GIT_REPLACE_REF_BASE_ENVIRONMENT "GIT_REPLACE_REF_BASE"
#define GITATTRIBUTES_FILE ".gitattributes"
#define INFOATTRIBUTES_FILE "info/attributes"
#define ATTRIBUTE_MACRO_PREFIX "[attr]"
extern const char *get_git_namespace(void);
extern const char *strip_namespace(const char *namespaced_ref);
extern const char *get_git_work_tree(void);
-extern const char *read_gitfile(const char *path);
+
+#define READ_GITFILE_ERR_STAT_FAILED 1
+#define READ_GITFILE_ERR_NOT_A_FILE 2
+#define READ_GITFILE_ERR_OPEN_FAILED 3
+#define READ_GITFILE_ERR_READ_FAILED 4
+#define READ_GITFILE_ERR_INVALID_FORMAT 5
+#define READ_GITFILE_ERR_NO_PATH 6
+#define READ_GITFILE_ERR_NOT_A_REPO 7
+#define READ_GITFILE_ERR_TOO_LARGE 8
+extern const char *read_gitfile_gently(const char *path, int *return_error_code);
+#define read_gitfile(path) read_gitfile_gently((path), NULL)
extern const char *resolve_gitdir(const char *suspect);
extern void set_git_work_tree(const char *tree);
extern int hold_locked_index(struct lock_file *, int);
extern void set_alternate_index_output(const char *);
- extern int delete_ref(const char *, const unsigned char *sha1, unsigned int flags);
-
/* Environment bits from configuration mechanism */
extern int trust_executable_bit;
extern int trust_ctime;
* been sought but there were none.
*/
extern int check_replace_refs;
+extern char *git_replace_ref_base;
extern int fsync_object_files;
extern int core_preload_index;
* Return true iff we have an object named sha1, whether local or in
* an alternate object database, and whether packed or loose. This
* function does not respect replace references.
+ *
+ * If the QUICK flag is set, do not re-check the pack directory
+ * when we cannot find the object (this means we may give a false
+ * negative answer if another process is simultaneously repacking).
*/
-extern int has_sha1_file(const unsigned char *sha1);
+#define HAS_SHA1_QUICK 0x1
+extern int has_sha1_file_with_flags(const unsigned char *sha1, int flags);
+static inline int has_sha1_file(const unsigned char *sha1)
+{
+ return has_sha1_file_with_flags(sha1, 0);
+}
/*
* Return true iff an alternate object database has a loose object
extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
extern char *oid_to_hex(const struct object_id *oid); /* same static buffer as sha1_to_hex */
- extern int read_ref_full(const char *refname, int resolve_flags,
- unsigned char *sha1, int *flags);
- extern int read_ref(const char *refname, unsigned char *sha1);
- /*
- * Resolve a reference, recursively following symbolic refererences.
- *
- * Store the referred-to object's name in sha1 and return the name of
- * the non-symbolic reference that ultimately pointed at it. The
- * return value, if not NULL, is a pointer into either a static buffer
- * or the input ref.
- *
- * If the reference cannot be resolved to an object, the behavior
- * depends on the RESOLVE_REF_READING flag:
- *
- * - If RESOLVE_REF_READING is set, return NULL.
- *
- * - If RESOLVE_REF_READING is not set, clear sha1 and return the name of
- * the last reference name in the chain, which will either be a non-symbolic
- * reference or an undefined reference. If this is a prelude to
- * "writing" to the ref, the return value is the name of the ref
- * that will actually be created or changed.
- *
- * If the RESOLVE_REF_NO_RECURSE flag is passed, only resolves one
- * level of symbolic reference. The value stored in sha1 for a symbolic
- * reference will always be null_sha1 in this case, and the return
- * value is the reference that the symref refers to directly.
- *
- * If flags is non-NULL, set the value that it points to the
- * combination of REF_ISPACKED (if the reference was found among the
- * packed references), REF_ISSYMREF (if the initial reference was a
- * symbolic reference), REF_BAD_NAME (if the reference name is ill
- * formed --- see RESOLVE_REF_ALLOW_BAD_NAME below), and REF_ISBROKEN
- * (if the ref is malformed or has a bad name). See refs.h for more detail
- * on each flag.
- *
- * If ref is not a properly-formatted, normalized reference, return
- * NULL. If more than MAXDEPTH recursive symbolic lookups are needed,
- * give up and return NULL.
- *
- * RESOLVE_REF_ALLOW_BAD_NAME allows resolving refs even when their
- * name is invalid according to git-check-ref-format(1). If the name
- * is bad then the value stored in sha1 will be null_sha1 and the two
- * flags REF_ISBROKEN and REF_BAD_NAME will be set.
- *
- * Even with RESOLVE_REF_ALLOW_BAD_NAME, names that escape the refs/
- * directory and do not consist of all caps and underscores cannot be
- * resolved. The function returns NULL for such ref names.
- * Caps and underscores refers to the special refs, such as HEAD,
- * FETCH_HEAD and friends, that all live outside of the refs/ directory.
- */
- #define RESOLVE_REF_READING 0x01
- #define RESOLVE_REF_NO_RECURSE 0x02
- #define RESOLVE_REF_ALLOW_BAD_NAME 0x04
- extern const char *resolve_ref_unsafe(const char *ref, int resolve_flags, unsigned char *sha1, int *flags);
- extern char *resolve_refdup(const char *ref, int resolve_flags, unsigned char *sha1, int *flags);
-
- extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
- extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
extern int interpret_branch_name(const char *str, int len, struct strbuf *);
extern int get_sha1_mb(const char *str, unsigned char *sha1);
- /*
- * Return true iff abbrev_name is a possible abbreviation for
- * full_name according to the rules defined by ref_rev_parse_rules in
- * refs.c.
- */
- extern int refname_match(const char *abbrev_name, const char *full_name);
-
- extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
extern int validate_headref(const char *ref);
extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
void stat_validity_update(struct stat_validity *sv, int fd);
int versioncmp(const char *s1, const char *s2);
+void sleep_millisec(int millisec);
#endif /* CACHE_H */
return get_packed_ref_dir(get_packed_ref_cache(refs));
}
- void add_packed_ref(const char *refname, const unsigned char *sha1)
+ /*
+ * Add a reference to the in-memory packed reference cache. This may
+ * only be called while the packed-refs file is locked (see
+ * lock_packed_refs()). To actually write the packed-refs file, call
+ * commit_packed_refs().
+ */
+ static void add_packed_ref(const char *refname, const unsigned char *sha1)
{
struct packed_ref_cache *packed_ref_cache =
get_packed_ref_cache(&ref_cache);
create_dir_entry(refs, refname.buf,
refname.len, 1));
} else {
+ int read_ok;
+
if (*refs->name) {
hashclr(sha1);
flag = 0;
- if (resolve_gitlink_ref(refs->name, refname.buf, sha1) < 0) {
- hashclr(sha1);
- flag |= REF_ISBROKEN;
- }
- } else if (read_ref_full(refname.buf,
- RESOLVE_REF_READING,
- sha1, &flag)) {
+ read_ok = !resolve_gitlink_ref(refs->name,
+ refname.buf, sha1);
+ } else {
+ read_ok = !read_ref_full(refname.buf,
+ RESOLVE_REF_READING,
+ sha1, &flag);
+ }
+
+ if (!read_ok) {
hashclr(sha1);
flag |= REF_ISBROKEN;
+ } else if (is_null_sha1(sha1)) {
+ /*
+ * It is so astronomically unlikely
+ * that NULL_SHA1 is the SHA-1 of an
+ * actual object that we consider its
+ * appearance in a loose reference
+ * file to be repo corruption
+ * (probably due to a software bug).
+ */
+ flag |= REF_ISBROKEN;
}
+
if (check_refname_format(refname.buf,
REFNAME_ALLOW_ONELEVEL)) {
if (!refname_is_safe(refname.buf))
return ret;
}
- char *resolve_refdup(const char *ref, int resolve_flags, unsigned char *sha1, int *flags)
+ char *resolve_refdup(const char *refname, int resolve_flags,
+ unsigned char *sha1, int *flags)
{
- return xstrdup_or_null(resolve_ref_unsafe(ref, resolve_flags, sha1, flags));
+ return xstrdup_or_null(resolve_ref_unsafe(refname, resolve_flags,
+ sha1, flags));
}
/* The argument to filter_refs */
int for_each_replace_ref(each_ref_fn fn, void *cb_data)
{
- return do_for_each_ref(&ref_cache, "refs/replace/", fn, 13, 0, cb_data);
+ return do_for_each_ref(&ref_cache, git_replace_ref_base, fn,
+ strlen(git_replace_ref_base), 0, cb_data);
}
int head_ref_namespaced(each_ref_fn fn, void *cb_data)
return 0;
}
- /* This should return a meaningful errno on failure */
- int lock_packed_refs(int flags)
+ /*
+ * Lock the packed-refs file for writing. Flags is passed to
+ * hold_lock_file_for_update(). Return 0 on success. On errors, set
+ * errno appropriately and return a nonzero value.
+ */
+ static int lock_packed_refs(int flags)
{
static int timeout_configured = 0;
static int timeout_value = 1000;
}
/*
- * Commit the packed refs changes.
- * On error we must make sure that errno contains a meaningful value.
+ * Write the current version of the packed refs cache from memory to
+ * disk. The packed-refs file must already be locked for writing (see
+ * lock_packed_refs()). Return zero on success. On errors, set errno
+ * and return a nonzero value
*/
- int commit_packed_refs(void)
+ static int commit_packed_refs(void)
{
struct packed_ref_cache *packed_ref_cache =
get_packed_ref_cache(&ref_cache);
return error;
}
- void rollback_packed_refs(void)
+ /*
+ * Rollback the lockfile for the packed-refs file, and discard the
+ * in-memory packed reference cache. (The packed-refs file will be
+ * read anew if it is needed again after this function is called.)
+ */
+ static void rollback_packed_refs(void)
{
struct packed_ref_cache *packed_ref_cache =
get_packed_ref_cache(&ref_cache);
return 0;
}
- int repack_without_refs(struct string_list *refnames, struct strbuf *err)
+ /*
+ * Rewrite the packed-refs file, omitting any refs listed in
+ * 'refnames'. On error, leave packed-refs unchanged, write an error
+ * message to 'err', and return a nonzero value.
+ *
+ * The refs in 'refnames' needn't be sorted. `err` must not be NULL.
+ */
+ static int repack_without_refs(struct string_list *refnames, struct strbuf *err)
{
struct ref_dir *packed;
struct string_list_item *refname;
return 0;
}
- int delete_ref(const char *refname, const unsigned char *sha1, unsigned int flags)
+ int delete_ref(const char *refname, const unsigned char *old_sha1,
+ unsigned int flags)
{
struct ref_transaction *transaction;
struct strbuf err = STRBUF_INIT;
transaction = ref_transaction_begin(&err);
if (!transaction ||
- ref_transaction_delete(transaction, refname,
- (sha1 && !is_null_sha1(sha1)) ? sha1 : NULL,
+ ref_transaction_delete(transaction, refname, old_sha1,
flags, NULL, &err) ||
ref_transaction_commit(transaction, &err)) {
error("%s", err.buf);
return 0;
}
+ int delete_refs(struct string_list *refnames)
+ {
+ struct strbuf err = STRBUF_INIT;
+ int i, result = 0;
+
+ if (!refnames->nr)
+ return 0;
+
+ result = repack_without_refs(refnames, &err);
+ if (result) {
+ /*
+ * If we failed to rewrite the packed-refs file, then
+ * it is unsafe to try to remove loose refs, because
+ * doing so might expose an obsolete packed value for
+ * a reference that might even point at an object that
+ * has been garbage collected.
+ */
+ 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);
+
+ goto out;
+ }
+
+ for (i = 0; i < refnames->nr; i++) {
+ const char *refname = refnames->items[i].string;
+
+ if (delete_ref(refname, NULL, 0))
+ result |= error(_("could not remove reference %s"), refname);
+ }
+
+ out:
+ strbuf_release(&err);
+ return result;
+ }
+
/*
* People using contrib's git-new-workdir have .git/logs/refs ->
* /some/other/path/.git/logs/refs, and that may live on another device.
return ret;
}
+ static int ref_present(const char *refname,
+ const struct object_id *oid, int flags, void *cb_data)
+ {
+ struct string_list *affected_refnames = cb_data;
+
+ return string_list_has_string(affected_refnames, refname);
+ }
+
+ int initial_ref_transaction_commit(struct ref_transaction *transaction,
+ struct strbuf *err)
+ {
+ struct ref_dir *loose_refs = get_loose_refs(&ref_cache);
+ struct ref_dir *packed_refs = get_packed_refs(&ref_cache);
+ int ret = 0, i;
+ int n = transaction->nr;
+ struct ref_update **updates = transaction->updates;
+ struct string_list affected_refnames = STRING_LIST_INIT_NODUP;
+
+ assert(err);
+
+ if (transaction->state != REF_TRANSACTION_OPEN)
+ die("BUG: commit called for transaction that is not open");
+
+ /* Fail if a refname appears more than once in the transaction: */
+ for (i = 0; i < n; i++)
+ string_list_append(&affected_refnames, updates[i]->refname);
+ string_list_sort(&affected_refnames);
+ if (ref_update_reject_duplicates(&affected_refnames, err)) {
+ ret = TRANSACTION_GENERIC_ERROR;
+ goto cleanup;
+ }
+
+ /*
+ * It's really undefined to call this function in an active
+ * repository or when there are existing references: we are
+ * only locking and changing packed-refs, so (1) any
+ * simultaneous processes might try to change a reference at
+ * the same time we do, and (2) any existing loose versions of
+ * the references that we are setting would have precedence
+ * over our values. But some remote helpers create the remote
+ * "HEAD" and "master" branches before calling this function,
+ * so here we really only check that none of the references
+ * that we are creating already exists.
+ */
+ if (for_each_rawref(ref_present, &affected_refnames))
+ die("BUG: initial ref transaction called with existing refs");
+
+ for (i = 0; i < n; i++) {
+ struct ref_update *update = updates[i];
+
+ if ((update->flags & REF_HAVE_OLD) &&
+ !is_null_sha1(update->old_sha1))
+ die("BUG: initial ref transaction with old_sha1 set");
+ if (verify_refname_available(update->refname,
+ &affected_refnames, NULL,
+ loose_refs, err) ||
+ verify_refname_available(update->refname,
+ &affected_refnames, NULL,
+ packed_refs, err)) {
+ ret = TRANSACTION_NAME_CONFLICT;
+ goto cleanup;
+ }
+ }
+
+ if (lock_packed_refs(0)) {
+ strbuf_addf(err, "unable to lock packed-refs file: %s",
+ strerror(errno));
+ ret = TRANSACTION_GENERIC_ERROR;
+ goto cleanup;
+ }
+
+ for (i = 0; i < n; i++) {
+ struct ref_update *update = updates[i];
+
+ if ((update->flags & REF_HAVE_NEW) &&
+ !is_null_sha1(update->new_sha1))
+ add_packed_ref(update->refname, update->new_sha1);
+ }
+
+ if (commit_packed_refs()) {
+ strbuf_addf(err, "unable to commit packed-refs file: %s",
+ strerror(errno));
+ ret = TRANSACTION_GENERIC_ERROR;
+ goto cleanup;
+ }
+
+ cleanup:
+ transaction->state = REF_TRANSACTION_CLOSED;
+ string_list_clear(&affected_refnames, 0);
+ return ret;
+ }
+
char *shorten_unambiguous_ref(const char *refname, int strict)
{
int i;