#include "tag.h"
#include "dir.h"
-/* ISSYMREF=0x01, ISPACKED=0x02 and ISBROKEN=0x04 are public interfaces */
-#define REF_KNOWS_PEELED 0x10
+/*
+ * Make sure "ref" is something reasonable to have under ".git/refs/";
+ * We do not like it if:
+ *
+ * - any path component of it begins with ".", or
+ * - it has double dots "..", or
+ * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or
+ * - it ends with a "/".
+ * - it ends with ".lock"
+ * - it contains a "\" (backslash)
+ */
-struct ref_entry {
- unsigned char flag; /* ISSYMREF? ISPACKED? */
+/* Return true iff ch is not allowed in reference names. */
+static inline int bad_ref_char(int ch)
+{
+ if (((unsigned) ch) <= ' ' || ch == 0x7f ||
+ ch == '~' || ch == '^' || ch == ':' || ch == '\\')
+ return 1;
+ /* 2.13 Pattern Matching Notation */
+ if (ch == '*' || ch == '?' || ch == '[') /* Unsupported */
+ return 1;
+ return 0;
+}
+
+/*
+ * Try to read one refname component from the front of refname. Return
+ * the length of the component found, or -1 if the component is not
+ * legal.
+ */
+static int check_refname_component(const char *refname, int flags)
+{
+ const char *cp;
+ char last = '\0';
+
+ for (cp = refname; ; cp++) {
+ char ch = *cp;
+ if (ch == '\0' || ch == '/')
+ break;
+ if (bad_ref_char(ch))
+ return -1; /* Illegal character in refname. */
+ if (last == '.' && ch == '.')
+ return -1; /* Refname contains "..". */
+ if (last == '@' && ch == '{')
+ return -1; /* Refname contains "@{". */
+ last = ch;
+ }
+ if (cp == refname)
+ return 0; /* Component has zero length. */
+ if (refname[0] == '.') {
+ if (!(flags & REFNAME_DOT_COMPONENT))
+ return -1; /* Component starts with '.'. */
+ /*
+ * Even if leading dots are allowed, don't allow "."
+ * as a component (".." is prevented by a rule above).
+ */
+ if (refname[1] == '\0')
+ return -1; /* Component equals ".". */
+ }
+ if (cp - refname >= 5 && !memcmp(cp - 5, ".lock", 5))
+ return -1; /* Refname ends with ".lock". */
+ return cp - refname;
+}
+
+int check_refname_format(const char *refname, int flags)
+{
+ int component_len, component_count = 0;
+
+ while (1) {
+ /* We are at the start of a path component. */
+ component_len = check_refname_component(refname, flags);
+ if (component_len <= 0) {
+ if ((flags & REFNAME_REFSPEC_PATTERN) &&
+ refname[0] == '*' &&
+ (refname[1] == '\0' || refname[1] == '/')) {
+ /* Accept one wildcard as a full refname component. */
+ flags &= ~REFNAME_REFSPEC_PATTERN;
+ component_len = 1;
+ } else {
+ return -1;
+ }
+ }
+ component_count++;
+ if (refname[component_len] == '\0')
+ break;
+ /* Skip to next component. */
+ refname += component_len + 1;
+ }
+
+ if (refname[component_len - 1] == '.')
+ return -1; /* Refname ends with '.'. */
+ if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2)
+ return -1; /* Refname has only one component. */
+ return 0;
+}
+
+struct ref_entry;
+
+struct ref_value {
unsigned char sha1[20];
unsigned char peeled[20];
- char name[FLEX_ARRAY];
};
-struct ref_array {
+struct ref_dir {
int nr, alloc;
- struct ref_entry **refs;
-};
-static const char *parse_ref_line(char *line, unsigned char *sha1)
-{
/*
- * 42: the answer to everything.
- *
- * In this case, it happens to be the answer to
- * 40 (length of sha1 hex representation)
- * +1 (space in between hex and name)
- * +1 (newline at the end of the line)
+ * Entries with index 0 <= i < sorted are sorted by name. New
+ * entries are appended to the list unsorted, and are sorted
+ * only when required; thus we avoid the need to sort the list
+ * after the addition of every reference.
*/
- int len = strlen(line) - 42;
+ int sorted;
- if (len <= 0)
- return NULL;
- if (get_sha1_hex(line, sha1) < 0)
- return NULL;
- if (!isspace(line[40]))
- return NULL;
- line += 41;
- if (isspace(*line))
- return NULL;
- if (line[len] != '\n')
- return NULL;
- line[len] = 0;
+ struct ref_entry **entries;
+};
- return line;
-}
+/* ISSYMREF=0x01, ISPACKED=0x02, and ISBROKEN=0x04 are public interfaces */
+#define REF_KNOWS_PEELED 0x08
+#define REF_DIR 0x10
-static void add_ref(const char *name, const unsigned char *sha1,
- int flag, int check_name, struct ref_array *refs,
- struct ref_entry **new_entry)
+/*
+ * A ref_entry represents either a reference or a "subdirectory" of
+ * references. Each directory in the reference namespace is
+ * represented by a ref_entry with (flags & REF_DIR) set and
+ * containing a subdir member that holds the entries in that
+ * directory. References are represented by a ref_entry with (flags &
+ * REF_DIR) unset and a value member that describes the reference's
+ * value. The flag member is at the ref_entry level, but it is also
+ * needed to interpret the contents of the value field (in other
+ * words, a ref_value object is not very much use without the
+ * enclosing ref_entry).
+ *
+ * Reference names cannot end with slash and directories' names are
+ * always stored with a trailing slash (except for the top-level
+ * directory, which is always denoted by ""). This has two nice
+ * consequences: (1) when the entries in each subdir are sorted
+ * lexicographically by name (as they usually are), the references in
+ * a whole tree can be generated in lexicographic order by traversing
+ * the tree in left-to-right, depth-first order; (2) the names of
+ * references and subdirectories cannot conflict, and therefore the
+ * presence of an empty subdirectory does not block the creation of a
+ * similarly-named reference. (The fact that reference names with the
+ * same leading components can conflict *with each other* is a
+ * separate issue that is regulated by is_refname_available().)
+ *
+ * Please note that the name field contains the fully-qualified
+ * reference (or subdirectory) name. Space could be saved by only
+ * storing the relative names. But that would require the full names
+ * to be generated on the fly when iterating in do_for_each_ref(), and
+ * would break callback functions, who have always been able to assume
+ * that the name strings that they are passed will not be freed during
+ * the iteration.
+ */
+struct ref_entry {
+ unsigned char flag; /* ISSYMREF? ISPACKED? */
+ union {
+ struct ref_value value; /* if not (flags&REF_DIR) */
+ struct ref_dir subdir; /* if (flags&REF_DIR) */
+ } u;
+ /*
+ * The full name of the reference (e.g., "refs/heads/master")
+ * or the full name of the directory with a trailing slash
+ * (e.g., "refs/heads/"):
+ */
+ char name[FLEX_ARRAY];
+};
+
+static struct ref_entry *create_ref_entry(const char *refname,
+ const unsigned char *sha1, int flag,
+ int check_name)
{
int len;
- struct ref_entry *entry;
+ struct ref_entry *ref;
- /* Allocate it and add it in.. */
- len = strlen(name) + 1;
- entry = xmalloc(sizeof(struct ref_entry) + len);
- hashcpy(entry->sha1, sha1);
- hashclr(entry->peeled);
if (check_name &&
- check_refname_format(name, REFNAME_ALLOW_ONELEVEL|REFNAME_DOT_COMPONENT))
- die("Reference has invalid format: '%s'", name);
- memcpy(entry->name, name, len);
- entry->flag = flag;
- if (new_entry)
- *new_entry = entry;
- ALLOC_GROW(refs->refs, refs->nr + 1, refs->alloc);
- refs->refs[refs->nr++] = entry;
+ check_refname_format(refname, REFNAME_ALLOW_ONELEVEL|REFNAME_DOT_COMPONENT))
+ die("Reference has invalid format: '%s'", refname);
+ len = strlen(refname) + 1;
+ ref = xmalloc(sizeof(struct ref_entry) + len);
+ hashcpy(ref->u.value.sha1, sha1);
+ hashclr(ref->u.value.peeled);
+ memcpy(ref->name, refname, len);
+ ref->flag = flag;
+ return ref;
}
-static int ref_entry_cmp(const void *a, const void *b)
+static void clear_ref_dir(struct ref_dir *dir);
+
+static void free_ref_entry(struct ref_entry *entry)
{
- struct ref_entry *one = *(struct ref_entry **)a;
- struct ref_entry *two = *(struct ref_entry **)b;
- return strcmp(one->name, two->name);
+ if (entry->flag & REF_DIR)
+ clear_ref_dir(&entry->u.subdir);
+ free(entry);
}
-static void sort_ref_array(struct ref_array *array)
+/*
+ * Add a ref_entry to the end of dir (unsorted). Entry is always
+ * stored directly in dir; no recursion into subdirectories is
+ * done.
+ */
+static void add_entry_to_dir(struct ref_dir *dir, struct ref_entry *entry)
{
- int i = 0, j = 1;
+ ALLOC_GROW(dir->entries, dir->nr + 1, dir->alloc);
+ dir->entries[dir->nr++] = entry;
+}
- /* Nothing to sort unless there are at least two entries */
- if (array->nr < 2)
- return;
+/*
+ * Clear and free all entries in dir, recursively.
+ */
+static void clear_ref_dir(struct ref_dir *dir)
+{
+ int i;
+ for (i = 0; i < dir->nr; i++)
+ free_ref_entry(dir->entries[i]);
+ free(dir->entries);
+ dir->sorted = dir->nr = dir->alloc = 0;
+ dir->entries = NULL;
+}
- qsort(array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp);
-
- /* Remove any duplicates from the ref_array */
- for (; j < array->nr; j++) {
- struct ref_entry *a = array->refs[i];
- struct ref_entry *b = array->refs[j];
- if (!strcmp(a->name, b->name)) {
- if (hashcmp(a->sha1, b->sha1))
- die("Duplicated ref, and SHA1s don't match: %s",
- a->name);
- warning("Duplicated ref: %s", a->name);
- free(b);
- continue;
- }
- i++;
- array->refs[i] = array->refs[j];
- }
- array->nr = i + 1;
+/*
+ * Create a struct ref_entry object for the specified dirname.
+ * dirname is the name of the directory with a trailing slash (e.g.,
+ * "refs/heads/") or "" for the top-level directory.
+ */
+static struct ref_entry *create_dir_entry(const char *dirname)
+{
+ struct ref_entry *direntry;
+ int len = strlen(dirname);
+ direntry = xcalloc(1, sizeof(struct ref_entry) + len + 1);
+ memcpy(direntry->name, dirname, len + 1);
+ direntry->flag = REF_DIR;
+ return direntry;
}
-static struct ref_entry *search_ref_array(struct ref_array *array, const char *name)
+static int ref_entry_cmp(const void *a, const void *b)
+{
+ struct ref_entry *one = *(struct ref_entry **)a;
+ struct ref_entry *two = *(struct ref_entry **)b;
+ return strcmp(one->name, two->name);
+}
+
+static void sort_ref_dir(struct ref_dir *dir);
+
+/*
+ * Return the entry with the given refname from the ref_dir
+ * (non-recursively), sorting dir if necessary. Return NULL if no
+ * such entry is found.
+ */
+static struct ref_entry *search_ref_dir(struct ref_dir *dir, const char *refname)
{
struct ref_entry *e, **r;
int len;
- if (name == NULL)
+ if (refname == NULL || !dir->nr)
return NULL;
- if (!array->nr)
- return NULL;
+ sort_ref_dir(dir);
- len = strlen(name) + 1;
+ len = strlen(refname) + 1;
e = xmalloc(sizeof(struct ref_entry) + len);
- memcpy(e->name, name, len);
+ memcpy(e->name, refname, len);
- r = bsearch(&e, array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp);
+ r = bsearch(&e, dir->entries, dir->nr, sizeof(*dir->entries), ref_entry_cmp);
free(e);
return *r;
}
+/*
+ * Search for a directory entry directly within dir (without
+ * recursing). Sort dir if necessary. subdirname must be a directory
+ * name (i.e., end in '/'). If mkdir is set, then create the
+ * directory if it is missing; otherwise, return NULL if the desired
+ * directory cannot be found.
+ */
+static struct ref_entry *search_for_subdir(struct ref_dir *dir,
+ const char *subdirname, int mkdir)
+{
+ struct ref_entry *entry = search_ref_dir(dir, subdirname);
+ if (!entry) {
+ if (!mkdir)
+ return NULL;
+ entry = create_dir_entry(subdirname);
+ add_entry_to_dir(dir, entry);
+ }
+ assert(entry->flag & REF_DIR);
+ return entry;
+}
+
+/*
+ * If refname is a reference name, find the ref_dir within the dir
+ * tree that should hold refname. If refname is a directory name
+ * (i.e., ends in '/'), then return that ref_dir itself. dir must
+ * represent the top-level directory. Sort ref_dirs and recurse into
+ * subdirectories as necessary. If mkdir is set, then create any
+ * missing directories; otherwise, return NULL if the desired
+ * directory cannot be found.
+ */
+static struct ref_dir *find_containing_dir(struct ref_dir *dir,
+ const char *refname, int mkdir)
+{
+ struct strbuf dirname;
+ const char *slash;
+ strbuf_init(&dirname, PATH_MAX);
+ for (slash = strchr(refname, '/'); slash; slash = strchr(slash + 1, '/')) {
+ struct ref_entry *entry;
+ strbuf_add(&dirname,
+ refname + dirname.len,
+ (slash + 1) - (refname + dirname.len));
+ entry = search_for_subdir(dir, dirname.buf, mkdir);
+ if (!entry)
+ break;
+ dir = &entry->u.subdir;
+ }
+
+ strbuf_release(&dirname);
+ return dir;
+}
+
+/*
+ * Find the value entry with the given name in dir, sorting ref_dirs
+ * and recursing into subdirectories as necessary. If the name is not
+ * found or it corresponds to a directory entry, return NULL.
+ */
+static struct ref_entry *find_ref(struct ref_dir *dir, const char *refname)
+{
+ struct ref_entry *entry;
+ dir = find_containing_dir(dir, refname, 0);
+ if (!dir)
+ return NULL;
+ entry = search_ref_dir(dir, refname);
+ return (entry && !(entry->flag & REF_DIR)) ? entry : NULL;
+}
+
+/*
+ * Add a ref_entry to the ref_dir (unsorted), recursing into
+ * subdirectories as necessary. dir must represent the top-level
+ * directory. Return 0 on success.
+ */
+static int add_ref(struct ref_dir *dir, struct ref_entry *ref)
+{
+ dir = find_containing_dir(dir, ref->name, 1);
+ if (!dir)
+ return -1;
+ add_entry_to_dir(dir, ref);
+ return 0;
+}
+
+/*
+ * Emit a warning and return true iff ref1 and ref2 have the same name
+ * and the same sha1. Die if they have the same name but different
+ * sha1s.
+ */
+static int is_dup_ref(const struct ref_entry *ref1, const struct ref_entry *ref2)
+{
+ if (strcmp(ref1->name, ref2->name))
+ return 0;
+
+ /* Duplicate name; make sure that they don't conflict: */
+
+ if ((ref1->flag & REF_DIR) || (ref2->flag & REF_DIR))
+ /* This is impossible by construction */
+ die("Reference directory conflict: %s", ref1->name);
+
+ if (hashcmp(ref1->u.value.sha1, ref2->u.value.sha1))
+ die("Duplicated ref, and SHA1s don't match: %s", ref1->name);
+
+ warning("Duplicated ref: %s", ref1->name);
+ return 1;
+}
+
+/*
+ * Sort the entries in dir non-recursively (if they are not already
+ * sorted) and remove any duplicate entries.
+ */
+static void sort_ref_dir(struct ref_dir *dir)
+{
+ int i, j;
+ struct ref_entry *last = NULL;
+
+ /*
+ * This check also prevents passing a zero-length array to qsort(),
+ * which is a problem on some platforms.
+ */
+ if (dir->sorted == dir->nr)
+ return;
+
+ qsort(dir->entries, dir->nr, sizeof(*dir->entries), ref_entry_cmp);
+
+ /* Remove any duplicates: */
+ for (i = 0, j = 0; j < dir->nr; j++) {
+ struct ref_entry *entry = dir->entries[j];
+ if (last && is_dup_ref(last, entry))
+ free_ref_entry(entry);
+ else
+ last = dir->entries[i++] = entry;
+ }
+ dir->sorted = dir->nr = i;
+}
+
+#define DO_FOR_EACH_INCLUDE_BROKEN 01
+
+static struct ref_entry *current_ref;
+
+static int do_one_ref(const char *base, each_ref_fn fn, int trim,
+ int flags, void *cb_data, struct ref_entry *entry)
+{
+ int retval;
+ if (prefixcmp(entry->name, base))
+ return 0;
+
+ if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) {
+ if (entry->flag & REF_ISBROKEN)
+ return 0; /* ignore broken refs e.g. dangling symref */
+ if (!has_sha1_file(entry->u.value.sha1)) {
+ error("%s does not point to a valid object!", entry->name);
+ return 0;
+ }
+ }
+ current_ref = entry;
+ retval = fn(entry->name + trim, entry->u.value.sha1, entry->flag, cb_data);
+ current_ref = NULL;
+ return retval;
+}
+
+/*
+ * Call fn for each reference in dir that has index in the range
+ * offset <= index < dir->nr. Recurse into subdirectories that are in
+ * that index range, sorting them before iterating. This function
+ * does not sort dir itself; it should be sorted beforehand.
+ */
+static int do_for_each_ref_in_dir(struct ref_dir *dir, int offset,
+ const char *base,
+ each_ref_fn fn, int trim, int flags, void *cb_data)
+{
+ int i;
+ assert(dir->sorted == dir->nr);
+ for (i = offset; i < dir->nr; i++) {
+ struct ref_entry *entry = dir->entries[i];
+ int retval;
+ if (entry->flag & REF_DIR) {
+ sort_ref_dir(&entry->u.subdir);
+ retval = do_for_each_ref_in_dir(&entry->u.subdir, 0,
+ base, fn, trim, flags, cb_data);
+ } else {
+ retval = do_one_ref(base, fn, trim, flags, cb_data, entry);
+ }
+ if (retval)
+ return retval;
+ }
+ return 0;
+}
+
+/*
+ * Call fn for each reference in the union of dir1 and dir2, in order
+ * by refname. Recurse into subdirectories. If a value entry appears
+ * in both dir1 and dir2, then only process the version that is in
+ * dir2. The input dirs must already be sorted, but subdirs will be
+ * sorted as needed.
+ */
+static int do_for_each_ref_in_dirs(struct ref_dir *dir1,
+ struct ref_dir *dir2,
+ const char *base, each_ref_fn fn, int trim,
+ int flags, void *cb_data)
+{
+ int retval;
+ int i1 = 0, i2 = 0;
+
+ assert(dir1->sorted == dir1->nr);
+ assert(dir2->sorted == dir2->nr);
+ while (1) {
+ struct ref_entry *e1, *e2;
+ int cmp;
+ if (i1 == dir1->nr) {
+ return do_for_each_ref_in_dir(dir2, i2,
+ base, fn, trim, flags, cb_data);
+ }
+ if (i2 == dir2->nr) {
+ return do_for_each_ref_in_dir(dir1, i1,
+ base, fn, trim, flags, cb_data);
+ }
+ e1 = dir1->entries[i1];
+ e2 = dir2->entries[i2];
+ cmp = strcmp(e1->name, e2->name);
+ if (cmp == 0) {
+ if ((e1->flag & REF_DIR) && (e2->flag & REF_DIR)) {
+ /* Both are directories; descend them in parallel. */
+ sort_ref_dir(&e1->u.subdir);
+ sort_ref_dir(&e2->u.subdir);
+ retval = do_for_each_ref_in_dirs(
+ &e1->u.subdir, &e2->u.subdir,
+ base, fn, trim, flags, cb_data);
+ i1++;
+ i2++;
+ } else if (!(e1->flag & REF_DIR) && !(e2->flag & REF_DIR)) {
+ /* Both are references; ignore the one from dir1. */
+ retval = do_one_ref(base, fn, trim, flags, cb_data, e2);
+ i1++;
+ i2++;
+ } else {
+ die("conflict between reference and directory: %s",
+ e1->name);
+ }
+ } else {
+ struct ref_entry *e;
+ if (cmp < 0) {
+ e = e1;
+ i1++;
+ } else {
+ e = e2;
+ i2++;
+ }
+ if (e->flag & REF_DIR) {
+ sort_ref_dir(&e->u.subdir);
+ retval = do_for_each_ref_in_dir(
+ &e->u.subdir, 0,
+ base, fn, trim, flags, cb_data);
+ } else {
+ retval = do_one_ref(base, fn, trim, flags, cb_data, e);
+ }
+ }
+ if (retval)
+ return retval;
+ }
+ if (i1 < dir1->nr)
+ return do_for_each_ref_in_dir(dir1, i1,
+ base, fn, trim, flags, cb_data);
+ if (i2 < dir2->nr)
+ return do_for_each_ref_in_dir(dir2, i2,
+ base, fn, trim, flags, cb_data);
+ return 0;
+}
+
+/*
+ * Return true iff refname1 and refname2 conflict with each other.
+ * Two reference names conflict if one of them exactly matches the
+ * leading components of the other; e.g., "foo/bar" conflicts with
+ * both "foo" and with "foo/bar/baz" but not with "foo/bar" or
+ * "foo/barbados".
+ */
+static int names_conflict(const char *refname1, const char *refname2)
+{
+ for (; *refname1 && *refname1 == *refname2; refname1++, refname2++)
+ ;
+ return (*refname1 == '\0' && *refname2 == '/')
+ || (*refname1 == '/' && *refname2 == '\0');
+}
+
+struct name_conflict_cb {
+ const char *refname;
+ const char *oldrefname;
+ const char *conflicting_refname;
+};
+
+static int name_conflict_fn(const char *existingrefname, const unsigned char *sha1,
+ int flags, void *cb_data)
+{
+ struct name_conflict_cb *data = (struct name_conflict_cb *)cb_data;
+ if (data->oldrefname && !strcmp(data->oldrefname, existingrefname))
+ return 0;
+ if (names_conflict(data->refname, existingrefname)) {
+ data->conflicting_refname = existingrefname;
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Return true iff a reference named refname could be created without
+ * conflicting with the name of an existing reference in array. If
+ * oldrefname is non-NULL, ignore potential conflicts with oldrefname
+ * (e.g., because oldrefname is scheduled for deletion in the same
+ * operation).
+ */
+static int is_refname_available(const char *refname, const char *oldrefname,
+ struct ref_dir *dir)
+{
+ struct name_conflict_cb data;
+ data.refname = refname;
+ data.oldrefname = oldrefname;
+ data.conflicting_refname = NULL;
+
+ sort_ref_dir(dir);
+ if (do_for_each_ref_in_dir(dir, 0, "", name_conflict_fn,
+ 0, DO_FOR_EACH_INCLUDE_BROKEN,
+ &data)) {
+ error("'%s' exists; cannot create '%s'",
+ data.conflicting_refname, refname);
+ return 0;
+ }
+ return 1;
+}
+
/*
* Future: need to be in "struct repository"
* when doing a full libification.
struct ref_cache *next;
char did_loose;
char did_packed;
- struct ref_array loose;
- struct ref_array packed;
+ struct ref_dir loose;
+ struct ref_dir packed;
/* The submodule name, or "" for the main repo. */
char name[FLEX_ARRAY];
} *ref_cache;
-static struct ref_entry *current_ref;
-
-static struct ref_array extra_refs;
-
-static void free_ref_array(struct ref_array *array)
-{
- int i;
- for (i = 0; i < array->nr; i++)
- free(array->refs[i]);
- free(array->refs);
- array->nr = array->alloc = 0;
- array->refs = NULL;
-}
-
static void clear_packed_ref_cache(struct ref_cache *refs)
{
if (refs->did_packed)
- free_ref_array(&refs->packed);
+ clear_ref_dir(&refs->packed);
refs->did_packed = 0;
}
static void clear_loose_ref_cache(struct ref_cache *refs)
{
if (refs->did_loose)
- free_ref_array(&refs->loose);
+ clear_ref_dir(&refs->loose);
refs->did_loose = 0;
}
clear_loose_ref_cache(refs);
}
-static void read_packed_refs(FILE *f, struct ref_array *array)
+/*
+ * Parse one line from a packed-refs file. Write the SHA1 to sha1.
+ * Return a pointer to the refname within the line (null-terminated),
+ * or NULL if there was a problem.
+ */
+static const char *parse_ref_line(char *line, unsigned char *sha1)
+{
+ /*
+ * 42: the answer to everything.
+ *
+ * In this case, it happens to be the answer to
+ * 40 (length of sha1 hex representation)
+ * +1 (space in between hex and name)
+ * +1 (newline at the end of the line)
+ */
+ int len = strlen(line) - 42;
+
+ if (len <= 0)
+ return NULL;
+ if (get_sha1_hex(line, sha1) < 0)
+ return NULL;
+ if (!isspace(line[40]))
+ return NULL;
+ line += 41;
+ if (isspace(*line))
+ return NULL;
+ if (line[len] != '\n')
+ return NULL;
+ line[len] = 0;
+
+ return line;
+}
+
+static void read_packed_refs(FILE *f, struct ref_dir *dir)
{
struct ref_entry *last = NULL;
char refline[PATH_MAX];
while (fgets(refline, sizeof(refline), f)) {
unsigned char sha1[20];
- const char *name;
+ const char *refname;
static const char header[] = "# pack-refs with:";
if (!strncmp(refline, header, sizeof(header)-1)) {
continue;
}
- name = parse_ref_line(refline, sha1);
- if (name) {
- add_ref(name, sha1, flag, 1, array, &last);
+ refname = parse_ref_line(refline, sha1);
+ if (refname) {
+ last = create_ref_entry(refname, sha1, flag, 1);
+ add_ref(dir, last);
continue;
}
if (last &&
strlen(refline) == 42 &&
refline[41] == '\n' &&
!get_sha1_hex(refline + 1, sha1))
- hashcpy(last->peeled, sha1);
+ hashcpy(last->u.value.peeled, sha1);
}
- sort_ref_array(array);
-}
-
-void add_extra_ref(const char *name, const unsigned char *sha1, int flag)
-{
- add_ref(name, sha1, flag, 0, &extra_refs, NULL);
-}
-
-void clear_extra_refs(void)
-{
- free_ref_array(&extra_refs);
}
-static struct ref_array *get_packed_refs(const char *submodule)
+static struct ref_dir *get_packed_refs(struct ref_cache *refs)
{
- struct ref_cache *refs = get_ref_cache(submodule);
-
if (!refs->did_packed) {
const char *packed_refs_file;
FILE *f;
- if (submodule)
- packed_refs_file = git_path_submodule(submodule, "packed-refs");
+ if (*refs->name)
+ packed_refs_file = git_path_submodule(refs->name, "packed-refs");
else
packed_refs_file = git_path("packed-refs");
f = fopen(packed_refs_file, "r");
return &refs->packed;
}
-static void get_ref_dir(const char *submodule, const char *base,
- struct ref_array *array)
+void add_packed_ref(const char *refname, const unsigned char *sha1)
+{
+ add_ref(get_packed_refs(get_ref_cache(NULL)),
+ create_ref_entry(refname, sha1, REF_ISPACKED, 1));
+}
+
+/*
+ * Read the loose references for refs from the namespace dirname.
+ * dirname must end with '/'. dir must be the directory entry
+ * corresponding to dirname.
+ */
+static void get_ref_dir(struct ref_cache *refs, const char *dirname,
+ struct ref_dir *dir)
{
- DIR *dir;
+ DIR *d;
const char *path;
+ struct dirent *de;
+ int dirnamelen = strlen(dirname);
+ struct strbuf refname;
- if (submodule)
- path = git_path_submodule(submodule, "%s", base);
+ if (*refs->name)
+ path = git_path_submodule(refs->name, "%s", dirname);
else
- path = git_path("%s", base);
-
-
- dir = opendir(path);
+ path = git_path("%s", dirname);
- if (dir) {
- struct dirent *de;
- int baselen = strlen(base);
- char *ref = xmalloc(baselen + 257);
+ d = opendir(path);
+ if (!d)
+ return;
- memcpy(ref, base, baselen);
- if (baselen && base[baselen-1] != '/')
- ref[baselen++] = '/';
+ strbuf_init(&refname, dirnamelen + 257);
+ strbuf_add(&refname, dirname, dirnamelen);
- while ((de = readdir(dir)) != NULL) {
- unsigned char sha1[20];
- struct stat st;
- int flag;
- int namelen;
- const char *refdir;
+ while ((de = readdir(d)) != NULL) {
+ unsigned char sha1[20];
+ struct stat st;
+ int flag;
+ const char *refdir;
- if (de->d_name[0] == '.')
- continue;
- namelen = strlen(de->d_name);
- if (namelen > 255)
- continue;
- if (has_extension(de->d_name, ".lock"))
- continue;
- memcpy(ref + baselen, de->d_name, namelen+1);
- refdir = submodule
- ? git_path_submodule(submodule, "%s", ref)
- : git_path("%s", ref);
- if (stat(refdir, &st) < 0)
- continue;
- if (S_ISDIR(st.st_mode)) {
- get_ref_dir(submodule, ref, array);
- continue;
- }
- if (submodule) {
+ if (de->d_name[0] == '.')
+ continue;
+ if (has_extension(de->d_name, ".lock"))
+ continue;
+ strbuf_addstr(&refname, de->d_name);
+ refdir = *refs->name
+ ? git_path_submodule(refs->name, "%s", refname.buf)
+ : git_path("%s", refname.buf);
+ if (stat(refdir, &st) < 0) {
+ ; /* silently ignore */
+ } else if (S_ISDIR(st.st_mode)) {
+ strbuf_addch(&refname, '/');
+ get_ref_dir(refs, refname.buf,
+ &search_for_subdir(dir, refname.buf, 1)->u.subdir);
+ } else {
+ if (*refs->name) {
hashclr(sha1);
flag = 0;
- if (resolve_gitlink_ref(submodule, ref, sha1) < 0) {
+ if (resolve_gitlink_ref(refs->name, refname.buf, sha1) < 0) {
hashclr(sha1);
flag |= REF_ISBROKEN;
}
- } else if (!resolve_ref(ref, sha1, 1, &flag)) {
+ } else if (read_ref_full(refname.buf, sha1, 1, &flag)) {
hashclr(sha1);
flag |= REF_ISBROKEN;
}
- add_ref(ref, sha1, flag, 1, array, NULL);
+ add_entry_to_dir(dir,
+ create_ref_entry(refname.buf, sha1, flag, 1));
}
- free(ref);
- closedir(dir);
+ strbuf_setlen(&refname, dirnamelen);
}
+ strbuf_release(&refname);
+ closedir(d);
}
-struct warn_if_dangling_data {
- FILE *fp;
- const char *refname;
- const char *msg_fmt;
-};
-
-static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1,
- int flags, void *cb_data)
-{
- struct warn_if_dangling_data *d = cb_data;
- const char *resolves_to;
- unsigned char junk[20];
-
- if (!(flags & REF_ISSYMREF))
- return 0;
-
- resolves_to = resolve_ref(refname, junk, 0, NULL);
- if (!resolves_to || strcmp(resolves_to, d->refname))
- return 0;
-
- fprintf(d->fp, d->msg_fmt, refname);
- return 0;
-}
-
-void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname)
-{
- struct warn_if_dangling_data data;
-
- data.fp = fp;
- data.refname = refname;
- data.msg_fmt = msg_fmt;
- for_each_rawref(warn_if_dangling_symref, &data);
-}
-
-static struct ref_array *get_loose_refs(const char *submodule)
+static struct ref_dir *get_loose_refs(struct ref_cache *refs)
{
- struct ref_cache *refs = get_ref_cache(submodule);
-
if (!refs->did_loose) {
- get_ref_dir(submodule, "refs", &refs->loose);
- sort_ref_array(&refs->loose);
+ get_ref_dir(refs, "refs/",
+ &search_for_subdir(&refs->loose, "refs/", 1)->u.subdir);
refs->did_loose = 1;
}
return &refs->loose;
/*
* Called by resolve_gitlink_ref_recursive() after it failed to read
- * from "name", which is "module/.git/<refname>". Find <refname> in
- * the packed-refs file for the submodule.
+ * from the loose refs in ref_cache refs. Find <refname> in the
+ * packed-refs file for the submodule.
*/
-static int resolve_gitlink_packed_ref(char *name, int pathlen, const char *refname, unsigned char *result)
+static int resolve_gitlink_packed_ref(struct ref_cache *refs,
+ const char *refname, unsigned char *sha1)
{
- int retval = -1;
struct ref_entry *ref;
- struct ref_array *array;
-
- /* being defensive: resolve_gitlink_ref() did this for us */
- if (pathlen < 6 || memcmp(name + pathlen - 6, "/.git/", 6))
- die("Oops");
- name[pathlen - 6] = '\0'; /* make it path to the submodule */
- array = get_packed_refs(name);
- ref = search_ref_array(array, refname);
- if (ref != NULL) {
- memcpy(result, ref->sha1, 20);
- retval = 0;
- }
- return retval;
+ struct ref_dir *dir = get_packed_refs(refs);
+
+ ref = find_ref(dir, refname);
+ if (ref == NULL)
+ return -1;
+
+ memcpy(sha1, ref->u.value.sha1, 20);
+ return 0;
}
-static int resolve_gitlink_ref_recursive(char *name, int pathlen, const char *refname, unsigned char *result, int recursion)
+static int resolve_gitlink_ref_recursive(struct ref_cache *refs,
+ const char *refname, unsigned char *sha1,
+ int recursion)
{
- int fd, len = strlen(refname);
+ int fd, len;
char buffer[128], *p;
+ char *path;
- if (recursion > MAXDEPTH || len > MAXREFLEN)
+ if (recursion > MAXDEPTH || strlen(refname) > MAXREFLEN)
return -1;
- memcpy(name + pathlen, refname, len+1);
- fd = open(name, O_RDONLY);
+ path = *refs->name
+ ? git_path_submodule(refs->name, "%s", refname)
+ : git_path("%s", refname);
+ fd = open(path, O_RDONLY);
if (fd < 0)
- return resolve_gitlink_packed_ref(name, pathlen, refname, result);
+ return resolve_gitlink_packed_ref(refs, refname, sha1);
len = read(fd, buffer, sizeof(buffer)-1);
close(fd);
buffer[len] = 0;
/* Was it a detached head or an old-fashioned symlink? */
- if (!get_sha1_hex(buffer, result))
+ if (!get_sha1_hex(buffer, sha1))
return 0;
/* Symref? */
while (isspace(*p))
p++;
- return resolve_gitlink_ref_recursive(name, pathlen, p, result, recursion+1);
+ return resolve_gitlink_ref_recursive(refs, p, sha1, recursion+1);
}
-int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *result)
+int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *sha1)
{
int len = strlen(path), retval;
- char *gitdir;
- const char *tmp;
+ char *submodule;
+ struct ref_cache *refs;
while (len && path[len-1] == '/')
len--;
if (!len)
return -1;
- gitdir = xmalloc(len + MAXREFLEN + 8);
- memcpy(gitdir, path, len);
- memcpy(gitdir + len, "/.git", 6);
- len += 5;
-
- tmp = read_gitfile(gitdir);
- if (tmp) {
- free(gitdir);
- len = strlen(tmp);
- gitdir = xmalloc(len + MAXREFLEN + 3);
- memcpy(gitdir, tmp, len);
- }
- gitdir[len] = '/';
- gitdir[++len] = '\0';
- retval = resolve_gitlink_ref_recursive(gitdir, len, refname, result, 0);
- free(gitdir);
+ submodule = xstrndup(path, len);
+ refs = get_ref_cache(submodule);
+ free(submodule);
+
+ retval = resolve_gitlink_ref_recursive(refs, refname, sha1, 0);
return retval;
}
* Try to read ref from the packed references. On success, set sha1
* and return 0; otherwise, return -1.
*/
-static int get_packed_ref(const char *ref, unsigned char *sha1)
+static int get_packed_ref(const char *refname, unsigned char *sha1)
{
- struct ref_array *packed = get_packed_refs(NULL);
- struct ref_entry *entry = search_ref_array(packed, ref);
+ struct ref_dir *packed = get_packed_refs(get_ref_cache(NULL));
+ struct ref_entry *entry = find_ref(packed, refname);
if (entry) {
- hashcpy(sha1, entry->sha1);
+ hashcpy(sha1, entry->u.value.sha1);
return 0;
}
return -1;
}
-const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag)
+const char *resolve_ref_unsafe(const char *refname, unsigned char *sha1, int reading, int *flag)
{
int depth = MAXDEPTH;
ssize_t len;
char buffer[256];
- static char ref_buffer[256];
+ static char refname_buffer[256];
if (flag)
*flag = 0;
- if (check_refname_format(ref, REFNAME_ALLOW_ONELEVEL))
+ if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL))
return NULL;
for (;;) {
if (--depth < 0)
return NULL;
- git_snpath(path, sizeof(path), "%s", ref);
+ git_snpath(path, sizeof(path), "%s", refname);
if (lstat(path, &st) < 0) {
if (errno != ENOENT)
* The loose reference file does not exist;
* check for a packed reference.
*/
- if (!get_packed_ref(ref, sha1)) {
+ if (!get_packed_ref(refname, sha1)) {
if (flag)
*flag |= REF_ISPACKED;
- return ref;
+ return refname;
}
/* The reference is not a packed reference, either. */
if (reading) {
return NULL;
} else {
hashclr(sha1);
- return ref;
+ return refname;
}
}
buffer[len] = 0;
if (!prefixcmp(buffer, "refs/") &&
!check_refname_format(buffer, 0)) {
- strcpy(ref_buffer, buffer);
- ref = ref_buffer;
+ strcpy(refname_buffer, buffer);
+ refname = refname_buffer;
if (flag)
*flag |= REF_ISSYMREF;
continue;
*flag |= REF_ISBROKEN;
return NULL;
}
- ref = strcpy(ref_buffer, buf);
+ refname = strcpy(refname_buffer, buf);
}
/* Please note that FETCH_HEAD has a second line containing other data. */
if (get_sha1_hex(buffer, sha1) || (buffer[40] != '\0' && !isspace(buffer[40]))) {
*flag |= REF_ISBROKEN;
return NULL;
}
- return ref;
+ return refname;
+}
+
+char *resolve_refdup(const char *ref, unsigned char *sha1, int reading, int *flag)
+{
+ const char *ret = resolve_ref_unsafe(ref, sha1, reading, flag);
+ return ret ? xstrdup(ret) : NULL;
}
/* The argument to filter_refs */
void *cb_data;
};
-int read_ref(const char *ref, unsigned char *sha1)
+int read_ref_full(const char *refname, unsigned char *sha1, int reading, int *flags)
{
- if (resolve_ref(ref, sha1, 1, NULL))
+ if (resolve_ref_unsafe(refname, sha1, reading, flags))
return 0;
return -1;
}
-#define DO_FOR_EACH_INCLUDE_BROKEN 01
-static int do_one_ref(const char *base, each_ref_fn fn, int trim,
- int flags, void *cb_data, struct ref_entry *entry)
+int read_ref(const char *refname, unsigned char *sha1)
{
- if (prefixcmp(entry->name, base))
- return 0;
+ return read_ref_full(refname, sha1, 1, NULL);
+}
- if (!(flags & DO_FOR_EACH_INCLUDE_BROKEN)) {
- if (entry->flag & REF_ISBROKEN)
- return 0; /* ignore broken refs e.g. dangling symref */
- if (!has_sha1_file(entry->sha1)) {
- error("%s does not point to a valid object!", entry->name);
- return 0;
- }
- }
- current_ref = entry;
- return fn(entry->name + trim, entry->sha1, entry->flag, cb_data);
+int ref_exists(const char *refname)
+{
+ unsigned char sha1[20];
+ return !!resolve_ref_unsafe(refname, sha1, 1, NULL);
}
-static int filter_refs(const char *ref, const unsigned char *sha, int flags,
- void *data)
+static int filter_refs(const char *refname, const unsigned char *sha1, int flags,
+ void *data)
{
struct ref_filter *filter = (struct ref_filter *)data;
- if (fnmatch(filter->pattern, ref, 0))
+ if (fnmatch(filter->pattern, refname, 0))
return 0;
- return filter->fn(ref, sha, flags, filter->cb_data);
+ return filter->fn(refname, sha1, flags, filter->cb_data);
}
-int peel_ref(const char *ref, unsigned char *sha1)
+int peel_ref(const char *refname, unsigned char *sha1)
{
int flag;
unsigned char base[20];
struct object *o;
- if (current_ref && (current_ref->name == ref
- || !strcmp(current_ref->name, ref))) {
+ if (current_ref && (current_ref->name == refname
+ || !strcmp(current_ref->name, refname))) {
if (current_ref->flag & REF_KNOWS_PEELED) {
- hashcpy(sha1, current_ref->peeled);
+ hashcpy(sha1, current_ref->u.value.peeled);
return 0;
}
- hashcpy(base, current_ref->sha1);
+ hashcpy(base, current_ref->u.value.sha1);
goto fallback;
}
- if (!resolve_ref(ref, base, 1, &flag))
+ if (read_ref_full(refname, base, 1, &flag))
return -1;
if ((flag & REF_ISPACKED)) {
- struct ref_array *array = get_packed_refs(NULL);
- struct ref_entry *r = search_ref_array(array, ref);
+ struct ref_dir *dir = get_packed_refs(get_ref_cache(NULL));
+ struct ref_entry *r = find_ref(dir, refname);
if (r != NULL && r->flag & REF_KNOWS_PEELED) {
- hashcpy(sha1, r->peeled);
+ hashcpy(sha1, r->u.value.peeled);
return 0;
}
}
fallback:
o = parse_object(base);
if (o && o->type == OBJ_TAG) {
- o = deref_tag(o, ref, 0);
+ o = deref_tag(o, refname, 0);
if (o) {
hashcpy(sha1, o->sha1);
return 0;
return -1;
}
-static int do_for_each_ref(const char *submodule, const char *base, each_ref_fn fn,
- int trim, int flags, void *cb_data)
+struct warn_if_dangling_data {
+ FILE *fp;
+ const char *refname;
+ const char *msg_fmt;
+};
+
+static int warn_if_dangling_symref(const char *refname, const unsigned char *sha1,
+ int flags, void *cb_data)
{
- int retval = 0, i, p = 0, l = 0;
- struct ref_array *packed = get_packed_refs(submodule);
- struct ref_array *loose = get_loose_refs(submodule);
+ struct warn_if_dangling_data *d = cb_data;
+ const char *resolves_to;
+ unsigned char junk[20];
- struct ref_array *extra = &extra_refs;
+ if (!(flags & REF_ISSYMREF))
+ return 0;
- for (i = 0; i < extra->nr; i++)
- retval = do_one_ref(base, fn, trim, flags, cb_data, extra->refs[i]);
+ resolves_to = resolve_ref_unsafe(refname, junk, 0, NULL);
+ if (!resolves_to || strcmp(resolves_to, d->refname))
+ return 0;
- while (p < packed->nr && l < loose->nr) {
- struct ref_entry *entry;
- int cmp = strcmp(packed->refs[p]->name, loose->refs[l]->name);
- if (!cmp) {
- p++;
- continue;
- }
- if (cmp > 0) {
- entry = loose->refs[l++];
- } else {
- entry = packed->refs[p++];
- }
- retval = do_one_ref(base, fn, trim, flags, cb_data, entry);
- if (retval)
- goto end_each;
- }
+ fprintf(d->fp, d->msg_fmt, refname);
+ return 0;
+}
- if (l < loose->nr) {
- p = l;
- packed = loose;
- }
+void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname)
+{
+ struct warn_if_dangling_data data;
- for (; p < packed->nr; p++) {
- retval = do_one_ref(base, fn, trim, flags, cb_data, packed->refs[p]);
- if (retval)
- goto end_each;
+ data.fp = fp;
+ data.refname = refname;
+ data.msg_fmt = msg_fmt;
+ for_each_rawref(warn_if_dangling_symref, &data);
+}
+
+static int do_for_each_ref(const char *submodule, const char *base, each_ref_fn fn,
+ int trim, int flags, void *cb_data)
+{
+ struct ref_cache *refs = get_ref_cache(submodule);
+ struct ref_dir *packed_dir = get_packed_refs(refs);
+ struct ref_dir *loose_dir = get_loose_refs(refs);
+ int retval = 0;
+
+ if (base && *base) {
+ packed_dir = find_containing_dir(packed_dir, base, 0);
+ loose_dir = find_containing_dir(loose_dir, base, 0);
+ }
+
+ if (packed_dir && loose_dir) {
+ sort_ref_dir(packed_dir);
+ sort_ref_dir(loose_dir);
+ retval = do_for_each_ref_in_dirs(
+ packed_dir, loose_dir,
+ base, fn, trim, flags, cb_data);
+ } else if (packed_dir) {
+ sort_ref_dir(packed_dir);
+ retval = do_for_each_ref_in_dir(
+ packed_dir, 0,
+ base, fn, trim, flags, cb_data);
+ } else if (loose_dir) {
+ sort_ref_dir(loose_dir);
+ retval = do_for_each_ref_in_dir(
+ loose_dir, 0,
+ base, fn, trim, flags, cb_data);
}
-end_each:
- current_ref = NULL;
return retval;
}
-
static int do_head_ref(const char *submodule, each_ref_fn fn, void *cb_data)
{
unsigned char sha1[20];
return 0;
}
- if (resolve_ref("HEAD", sha1, 1, &flag))
+ if (!read_ref_full("HEAD", sha1, 1, &flag))
return fn("HEAD", sha1, flag, cb_data);
return 0;
int flag;
strbuf_addf(&buf, "%sHEAD", get_git_namespace());
- if (resolve_ref(buf.buf, sha1, 1, &flag))
+ if (!read_ref_full(buf.buf, sha1, 1, &flag))
ret = fn(buf.buf, sha1, flag, cb_data);
strbuf_release(&buf);
DO_FOR_EACH_INCLUDE_BROKEN, cb_data);
}
-/*
- * Make sure "ref" is something reasonable to have under ".git/refs/";
- * We do not like it if:
- *
- * - any path component of it begins with ".", or
- * - it has double dots "..", or
- * - it has ASCII control character, "~", "^", ":" or SP, anywhere, or
- * - it ends with a "/".
- * - it ends with ".lock"
- * - it contains a "\" (backslash)
- */
-
-/* Return true iff ch is not allowed in reference names. */
-static inline int bad_ref_char(int ch)
-{
- if (((unsigned) ch) <= ' ' || ch == 0x7f ||
- ch == '~' || ch == '^' || ch == ':' || ch == '\\')
- return 1;
- /* 2.13 Pattern Matching Notation */
- if (ch == '*' || ch == '?' || ch == '[') /* Unsupported */
- return 1;
- return 0;
-}
-
-/*
- * Try to read one refname component from the front of ref. Return
- * the length of the component found, or -1 if the component is not
- * legal.
- */
-static int check_refname_component(const char *ref, int flags)
-{
- const char *cp;
- char last = '\0';
-
- for (cp = ref; ; cp++) {
- char ch = *cp;
- if (ch == '\0' || ch == '/')
- break;
- if (bad_ref_char(ch))
- return -1; /* Illegal character in refname. */
- if (last == '.' && ch == '.')
- return -1; /* Refname contains "..". */
- if (last == '@' && ch == '{')
- return -1; /* Refname contains "@{". */
- last = ch;
- }
- if (cp == ref)
- return -1; /* Component has zero length. */
- if (ref[0] == '.') {
- if (!(flags & REFNAME_DOT_COMPONENT))
- return -1; /* Component starts with '.'. */
- /*
- * Even if leading dots are allowed, don't allow "."
- * as a component (".." is prevented by a rule above).
- */
- if (ref[1] == '\0')
- return -1; /* Component equals ".". */
- }
- if (cp - ref >= 5 && !memcmp(cp - 5, ".lock", 5))
- return -1; /* Refname ends with ".lock". */
- return cp - ref;
-}
-
-int check_refname_format(const char *ref, int flags)
-{
- int component_len, component_count = 0;
-
- while (1) {
- /* We are at the start of a path component. */
- component_len = check_refname_component(ref, flags);
- if (component_len < 0) {
- if ((flags & REFNAME_REFSPEC_PATTERN) &&
- ref[0] == '*' &&
- (ref[1] == '\0' || ref[1] == '/')) {
- /* Accept one wildcard as a full refname component. */
- flags &= ~REFNAME_REFSPEC_PATTERN;
- component_len = 1;
- } else {
- return -1;
- }
- }
- component_count++;
- if (ref[component_len] == '\0')
- break;
- /* Skip to next component. */
- ref += component_len + 1;
- }
-
- if (ref[component_len - 1] == '.')
- return -1; /* Refname ends with '.'. */
- if (!(flags & REFNAME_ALLOW_ONELEVEL) && component_count < 2)
- return -1; /* Refname has only one component. */
- return 0;
-}
-
const char *prettify_refname(const char *name)
{
return name + (
NULL
};
-const char *ref_fetch_rules[] = {
- "%.*s",
- "refs/%.*s",
- "refs/heads/%.*s",
- NULL
-};
-
int refname_match(const char *abbrev_name, const char *full_name, const char **rules)
{
const char **p;
static struct ref_lock *verify_lock(struct ref_lock *lock,
const unsigned char *old_sha1, int mustexist)
{
- if (!resolve_ref(lock->ref_name, lock->old_sha1, mustexist, NULL)) {
+ if (read_ref_full(lock->ref_name, lock->old_sha1, mustexist, NULL)) {
error("Can't verify ref %s", lock->ref_name);
unlock_ref(lock);
return NULL;
return result;
}
-static int is_refname_available(const char *ref, const char *oldref,
- struct ref_array *array, int quiet)
-{
- int i, namlen = strlen(ref); /* e.g. 'foo/bar' */
- for (i = 0; i < array->nr; i++ ) {
- struct ref_entry *entry = array->refs[i];
- /* entry->name could be 'foo' or 'foo/bar/baz' */
- if (!oldref || strcmp(oldref, entry->name)) {
- int len = strlen(entry->name);
- int cmplen = (namlen < len) ? namlen : len;
- const char *lead = (namlen < len) ? entry->name : ref;
- if (!strncmp(ref, entry->name, cmplen) &&
- lead[cmplen] == '/') {
- if (!quiet)
- error("'%s' exists; cannot create '%s'",
- entry->name, ref);
- return 0;
- }
- }
- }
- return 1;
-}
-
/*
* *string and *len will only be substituted, and *string returned (for
* later free()ing) if the string passed in is a magic short-hand form
this_result = refs_found ? sha1_from_ref : sha1;
mksnpath(fullref, sizeof(fullref), *p, len, str);
- r = resolve_ref(fullref, this_result, 1, &flag);
+ r = resolve_ref_unsafe(fullref, this_result, 1, &flag);
if (r) {
if (!refs_found++)
*ref = xstrdup(r);
const char *ref, *it;
mksnpath(path, sizeof(path), *p, len, str);
- ref = resolve_ref(path, hash, 1, NULL);
+ ref = resolve_ref_unsafe(path, hash, 1, NULL);
if (!ref)
continue;
if (!stat(git_path("logs/%s", path), &st) &&
return logs_found;
}
-static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1, int flags, int *type_p)
+static struct ref_lock *lock_ref_sha1_basic(const char *refname,
+ const unsigned char *old_sha1,
+ int flags, int *type_p)
{
char *ref_file;
- const char *orig_ref = ref;
+ const char *orig_refname = refname;
struct ref_lock *lock;
int last_errno = 0;
int type, lflags;
lock = xcalloc(1, sizeof(struct ref_lock));
lock->lock_fd = -1;
- ref = resolve_ref(ref, lock->old_sha1, mustexist, &type);
- if (!ref && errno == EISDIR) {
+ refname = resolve_ref_unsafe(refname, lock->old_sha1, mustexist, &type);
+ if (!refname && errno == EISDIR) {
/* we are trying to lock foo but we used to
* have foo/bar which now does not exist;
* it is normal for the empty directory 'foo'
* to remain.
*/
- ref_file = git_path("%s", orig_ref);
+ ref_file = git_path("%s", orig_refname);
if (remove_empty_directories(ref_file)) {
last_errno = errno;
- error("there are still refs under '%s'", orig_ref);
+ error("there are still refs under '%s'", orig_refname);
goto error_return;
}
- ref = resolve_ref(orig_ref, lock->old_sha1, mustexist, &type);
+ refname = resolve_ref_unsafe(orig_refname, lock->old_sha1, mustexist, &type);
}
if (type_p)
*type_p = type;
- if (!ref) {
+ if (!refname) {
last_errno = errno;
error("unable to resolve reference %s: %s",
- orig_ref, strerror(errno));
+ orig_refname, strerror(errno));
goto error_return;
}
missing = is_null_sha1(lock->old_sha1);
* name is a proper prefix of our refname.
*/
if (missing &&
- !is_refname_available(ref, NULL, get_packed_refs(NULL), 0)) {
+ !is_refname_available(refname, NULL, get_packed_refs(get_ref_cache(NULL)))) {
last_errno = ENOTDIR;
goto error_return;
}
lflags = LOCK_DIE_ON_ERROR;
if (flags & REF_NODEREF) {
- ref = orig_ref;
+ refname = orig_refname;
lflags |= LOCK_NODEREF;
}
- lock->ref_name = xstrdup(ref);
- lock->orig_ref_name = xstrdup(orig_ref);
- ref_file = git_path("%s", ref);
+ lock->ref_name = xstrdup(refname);
+ lock->orig_ref_name = xstrdup(orig_refname);
+ ref_file = git_path("%s", refname);
if (missing)
lock->force_write = 1;
if ((flags & REF_NODEREF) && (type & REF_ISSYMREF))
return NULL;
}
-struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1)
+struct ref_lock *lock_ref_sha1(const char *refname, const unsigned char *old_sha1)
{
char refpath[PATH_MAX];
- if (check_refname_format(ref, 0))
+ if (check_refname_format(refname, 0))
return NULL;
- strcpy(refpath, mkpath("refs/%s", ref));
+ strcpy(refpath, mkpath("refs/%s", refname));
return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL);
}
-struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags)
+struct ref_lock *lock_any_ref_for_update(const char *refname,
+ const unsigned char *old_sha1, int flags)
{
- if (check_refname_format(ref, REFNAME_ALLOW_ONELEVEL))
+ if (check_refname_format(refname, REFNAME_ALLOW_ONELEVEL))
return NULL;
- return lock_ref_sha1_basic(ref, old_sha1, flags, NULL);
+ return lock_ref_sha1_basic(refname, old_sha1, flags, NULL);
+}
+
+struct repack_without_ref_sb {
+ const char *refname;
+ int fd;
+};
+
+static int repack_without_ref_fn(const char *refname, const unsigned char *sha1,
+ int flags, void *cb_data)
+{
+ struct repack_without_ref_sb *data = cb_data;
+ char line[PATH_MAX + 100];
+ int len;
+
+ if (!strcmp(data->refname, refname))
+ return 0;
+ len = snprintf(line, sizeof(line), "%s %s\n",
+ sha1_to_hex(sha1), refname);
+ /* this should not happen but just being defensive */
+ if (len > sizeof(line))
+ die("too long a refname '%s'", refname);
+ write_or_die(data->fd, line, len);
+ return 0;
}
static struct lock_file packlock;
static int repack_without_ref(const char *refname)
{
- struct ref_array *packed;
- struct ref_entry *ref;
- int fd, i;
-
- packed = get_packed_refs(NULL);
- ref = search_ref_array(packed, refname);
- if (ref == NULL)
+ struct repack_without_ref_sb data;
+ struct ref_dir *packed = get_packed_refs(get_ref_cache(NULL));
+ if (find_ref(packed, refname) == NULL)
return 0;
- fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0);
- if (fd < 0) {
+ data.refname = refname;
+ data.fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0);
+ if (data.fd < 0) {
unable_to_lock_error(git_path("packed-refs"), errno);
return error("cannot delete '%s' from packed refs", refname);
}
-
- for (i = 0; i < packed->nr; i++) {
- char line[PATH_MAX + 100];
- int len;
-
- ref = packed->refs[i];
-
- if (!strcmp(refname, ref->name))
- continue;
- len = snprintf(line, sizeof(line), "%s %s\n",
- sha1_to_hex(ref->sha1), ref->name);
- /* this should not happen but just being defensive */
- if (len > sizeof(line))
- die("too long a refname '%s'", ref->name);
- write_or_die(fd, line, len);
- }
+ do_for_each_ref_in_dir(packed, 0, "", repack_without_ref_fn, 0, 0, &data);
return commit_lock_file(&packlock);
}
*/
#define TMP_RENAMED_LOG "logs/refs/.tmp-renamed-log"
-int rename_ref(const char *oldref, const char *newref, const char *logmsg)
+int rename_ref(const char *oldrefname, const char *newrefname, const char *logmsg)
{
unsigned char sha1[20], orig_sha1[20];
int flag = 0, logmoved = 0;
struct ref_lock *lock;
struct stat loginfo;
- int log = !lstat(git_path("logs/%s", oldref), &loginfo);
+ int log = !lstat(git_path("logs/%s", oldrefname), &loginfo);
const char *symref = NULL;
+ struct ref_cache *refs = get_ref_cache(NULL);
if (log && S_ISLNK(loginfo.st_mode))
- return error("reflog for %s is a symlink", oldref);
+ return error("reflog for %s is a symlink", oldrefname);
- symref = resolve_ref(oldref, orig_sha1, 1, &flag);
+ symref = resolve_ref_unsafe(oldrefname, orig_sha1, 1, &flag);
if (flag & REF_ISSYMREF)
return error("refname %s is a symbolic ref, renaming it is not supported",
- oldref);
+ oldrefname);
if (!symref)
- return error("refname %s not found", oldref);
+ return error("refname %s not found", oldrefname);
- if (!is_refname_available(newref, oldref, get_packed_refs(NULL), 0))
+ if (!is_refname_available(newrefname, oldrefname, get_packed_refs(refs)))
return 1;
- if (!is_refname_available(newref, oldref, get_loose_refs(NULL), 0))
+ if (!is_refname_available(newrefname, oldrefname, get_loose_refs(refs)))
return 1;
- if (log && rename(git_path("logs/%s", oldref), git_path(TMP_RENAMED_LOG)))
+ if (log && rename(git_path("logs/%s", oldrefname), git_path(TMP_RENAMED_LOG)))
return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s",
- oldref, strerror(errno));
+ oldrefname, strerror(errno));
- if (delete_ref(oldref, orig_sha1, REF_NODEREF)) {
- error("unable to delete old %s", oldref);
+ if (delete_ref(oldrefname, orig_sha1, REF_NODEREF)) {
+ error("unable to delete old %s", oldrefname);
goto rollback;
}
- if (resolve_ref(newref, sha1, 1, &flag) && delete_ref(newref, sha1, REF_NODEREF)) {
+ if (!read_ref_full(newrefname, sha1, 1, &flag) &&
+ delete_ref(newrefname, sha1, REF_NODEREF)) {
if (errno==EISDIR) {
- if (remove_empty_directories(git_path("%s", newref))) {
- error("Directory not empty: %s", newref);
+ if (remove_empty_directories(git_path("%s", newrefname))) {
+ error("Directory not empty: %s", newrefname);
goto rollback;
}
} else {
- error("unable to delete existing %s", newref);
+ error("unable to delete existing %s", newrefname);
goto rollback;
}
}
- if (log && safe_create_leading_directories(git_path("logs/%s", newref))) {
- error("unable to create directory for %s", newref);
+ if (log && safe_create_leading_directories(git_path("logs/%s", newrefname))) {
+ error("unable to create directory for %s", newrefname);
goto rollback;
}
retry:
- if (log && rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", newref))) {
+ if (log && rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", newrefname))) {
if (errno==EISDIR || errno==ENOTDIR) {
/*
* rename(a, b) when b is an existing
* directory ought to result in ISDIR, but
* Solaris 5.8 gives ENOTDIR. Sheesh.
*/
- if (remove_empty_directories(git_path("logs/%s", newref))) {
- error("Directory not empty: logs/%s", newref);
+ if (remove_empty_directories(git_path("logs/%s", newrefname))) {
+ error("Directory not empty: logs/%s", newrefname);
goto rollback;
}
goto retry;
} else {
error("unable to move logfile "TMP_RENAMED_LOG" to logs/%s: %s",
- newref, strerror(errno));
+ newrefname, strerror(errno));
goto rollback;
}
}
logmoved = log;
- lock = lock_ref_sha1_basic(newref, NULL, 0, NULL);
+ lock = lock_ref_sha1_basic(newrefname, NULL, 0, NULL);
if (!lock) {
- error("unable to lock %s for update", newref);
+ error("unable to lock %s for update", newrefname);
goto rollback;
}
lock->force_write = 1;
hashcpy(lock->old_sha1, orig_sha1);
if (write_ref_sha1(lock, orig_sha1, logmsg)) {
- error("unable to write current sha1 into %s", newref);
+ error("unable to write current sha1 into %s", newrefname);
goto rollback;
}
return 0;
rollback:
- lock = lock_ref_sha1_basic(oldref, NULL, 0, NULL);
+ lock = lock_ref_sha1_basic(oldrefname, NULL, 0, NULL);
if (!lock) {
- error("unable to lock %s for rollback", oldref);
+ error("unable to lock %s for rollback", oldrefname);
goto rollbacklog;
}
flag = log_all_ref_updates;
log_all_ref_updates = 0;
if (write_ref_sha1(lock, orig_sha1, NULL))
- error("unable to write current sha1 into %s", oldref);
+ error("unable to write current sha1 into %s", oldrefname);
log_all_ref_updates = flag;
rollbacklog:
- if (logmoved && rename(git_path("logs/%s", newref), git_path("logs/%s", oldref)))
+ if (logmoved && rename(git_path("logs/%s", newrefname), git_path("logs/%s", oldrefname)))
error("unable to restore logfile %s from %s: %s",
- oldref, newref, strerror(errno));
+ oldrefname, newrefname, strerror(errno));
if (!logmoved && log &&
- rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", oldref)))
+ rename(git_path(TMP_RENAMED_LOG), git_path("logs/%s", oldrefname)))
error("unable to restore logfile %s from "TMP_RENAMED_LOG": %s",
- oldref, strerror(errno));
+ oldrefname, strerror(errno));
return 1;
}
return cp - buf;
}
-int log_ref_setup(const char *ref_name, char *logfile, int bufsize)
+int log_ref_setup(const char *refname, char *logfile, int bufsize)
{
int logfd, oflags = O_APPEND | O_WRONLY;
- git_snpath(logfile, bufsize, "logs/%s", ref_name);
+ git_snpath(logfile, bufsize, "logs/%s", refname);
if (log_all_ref_updates &&
- (!prefixcmp(ref_name, "refs/heads/") ||
- !prefixcmp(ref_name, "refs/remotes/") ||
- !prefixcmp(ref_name, "refs/notes/") ||
- !strcmp(ref_name, "HEAD"))) {
+ (!prefixcmp(refname, "refs/heads/") ||
+ !prefixcmp(refname, "refs/remotes/") ||
+ !prefixcmp(refname, "refs/notes/") ||
+ !strcmp(refname, "HEAD"))) {
if (safe_create_leading_directories(logfile) < 0)
return error("unable to create directory for %s",
logfile);
return 0;
}
-static int log_ref_write(const char *ref_name, const unsigned char *old_sha1,
+static int log_ref_write(const char *refname, const unsigned char *old_sha1,
const unsigned char *new_sha1, const char *msg)
{
int logfd, result, written, oflags = O_APPEND | O_WRONLY;
if (log_all_ref_updates < 0)
log_all_ref_updates = !is_bare_repository();
- result = log_ref_setup(ref_name, log_file, sizeof(log_file));
+ result = log_ref_setup(refname, log_file, sizeof(log_file));
if (result)
return result;
unsigned char head_sha1[20];
int head_flag;
const char *head_ref;
- head_ref = resolve_ref("HEAD", head_sha1, 1, &head_flag);
+ head_ref = resolve_ref_unsafe("HEAD", head_sha1, 1, &head_flag);
if (head_ref && (head_flag & REF_ISSYMREF) &&
!strcmp(head_ref, lock->ref_name))
log_ref_write("HEAD", lock->old_sha1, sha1, logmsg);
return xmemdupz(line, ep - line);
}
-int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *sha1, char **msg, unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt)
+int read_ref_at(const char *refname, unsigned long at_time, int cnt,
+ unsigned char *sha1, char **msg,
+ unsigned long *cutoff_time, int *cutoff_tz, int *cutoff_cnt)
{
const char *logfile, *logdata, *logend, *rec, *lastgt, *lastrec;
char *tz_c;
void *log_mapped;
size_t mapsz;
- logfile = git_path("logs/%s", ref);
+ logfile = git_path("logs/%s", refname);
logfd = open(logfile, O_RDONLY, 0);
if (logfd < 0)
die_errno("Unable to read log '%s'", logfile);
return 1;
}
-int for_each_recent_reflog_ent(const char *ref, each_reflog_ent_fn fn, long ofs, void *cb_data)
+int for_each_recent_reflog_ent(const char *refname, each_reflog_ent_fn fn, long ofs, void *cb_data)
{
const char *logfile;
FILE *logfp;
struct strbuf sb = STRBUF_INIT;
int ret = 0;
- logfile = git_path("logs/%s", ref);
+ logfile = git_path("logs/%s", refname);
logfp = fopen(logfile, "r");
if (!logfp)
return -1;
return ret;
}
-int for_each_reflog_ent(const char *ref, each_reflog_ent_fn fn, void *cb_data)
+int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, void *cb_data)
{
- return for_each_recent_reflog_ent(ref, fn, 0, cb_data);
+ return for_each_recent_reflog_ent(refname, fn, 0, cb_data);
}
-static int do_for_each_reflog(const char *base, each_ref_fn fn, void *cb_data)
+/*
+ * Call fn for each reflog in the namespace indicated by name. name
+ * must be empty or end with '/'. Name will be used as a scratch
+ * space, but its contents will be restored before return.
+ */
+static int do_for_each_reflog(struct strbuf *name, each_ref_fn fn, void *cb_data)
{
- DIR *dir = opendir(git_path("logs/%s", base));
+ DIR *d = opendir(git_path("logs/%s", name->buf));
int retval = 0;
+ struct dirent *de;
+ int oldlen = name->len;
- if (dir) {
- struct dirent *de;
- int baselen = strlen(base);
- char *log = xmalloc(baselen + 257);
-
- memcpy(log, base, baselen);
- if (baselen && base[baselen-1] != '/')
- log[baselen++] = '/';
+ if (!d)
+ return name->len ? errno : 0;
- while ((de = readdir(dir)) != NULL) {
- struct stat st;
- int namelen;
+ while ((de = readdir(d)) != NULL) {
+ struct stat st;
- if (de->d_name[0] == '.')
- continue;
- namelen = strlen(de->d_name);
- if (namelen > 255)
- continue;
- if (has_extension(de->d_name, ".lock"))
- continue;
- memcpy(log + baselen, de->d_name, namelen+1);
- if (stat(git_path("logs/%s", log), &st) < 0)
- continue;
+ if (de->d_name[0] == '.')
+ continue;
+ if (has_extension(de->d_name, ".lock"))
+ continue;
+ strbuf_addstr(name, de->d_name);
+ if (stat(git_path("logs/%s", name->buf), &st) < 0) {
+ ; /* silently ignore */
+ } else {
if (S_ISDIR(st.st_mode)) {
- retval = do_for_each_reflog(log, fn, cb_data);
+ strbuf_addch(name, '/');
+ retval = do_for_each_reflog(name, fn, cb_data);
} else {
unsigned char sha1[20];
- if (!resolve_ref(log, sha1, 0, NULL))
- retval = error("bad ref for %s", log);
+ if (read_ref_full(name->buf, sha1, 0, NULL))
+ retval = error("bad ref for %s", name->buf);
else
- retval = fn(log, sha1, 0, cb_data);
+ retval = fn(name->buf, sha1, 0, cb_data);
}
if (retval)
break;
}
- free(log);
- closedir(dir);
+ strbuf_setlen(name, oldlen);
}
- else if (*base)
- return errno;
+ closedir(d);
return retval;
}
int for_each_reflog(each_ref_fn fn, void *cb_data)
{
- return do_for_each_reflog("", fn, cb_data);
+ int retval;
+ struct strbuf name;
+ strbuf_init(&name, PATH_MAX);
+ retval = do_for_each_reflog(&name, fn, cb_data);
+ strbuf_release(&name);
+ return retval;
}
int update_ref(const char *action, const char *refname,
return 0;
}
-int ref_exists(const char *refname)
-{
- unsigned char sha1[20];
- return !!resolve_ref(refname, sha1, 1, NULL);
-}
-
struct ref *find_ref_by_name(const struct ref *list, const char *name)
{
for ( ; list; list = list->next)
return;
}
-char *shorten_unambiguous_ref(const char *ref, int strict)
+char *shorten_unambiguous_ref(const char *refname, int strict)
{
int i;
static char **scanf_fmts;
/* bail out if there are no rules */
if (!nr_rules)
- return xstrdup(ref);
+ return xstrdup(refname);
- /* buffer for scanf result, at most ref must fit */
- short_name = xstrdup(ref);
+ /* 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) {
int rules_to_fail = i;
int short_name_len;
- if (1 != sscanf(ref, scanf_fmts[i], short_name))
+ if (1 != sscanf(refname, scanf_fmts[i], short_name))
continue;
short_name_len = strlen(short_name);
*/
for (j = 0; j < rules_to_fail; j++) {
const char *rule = ref_rev_parse_rules[j];
- unsigned char short_objectname[20];
char refname[PATH_MAX];
/* skip matched rule */
*/
mksnpath(refname, sizeof(refname),
rule, short_name_len, short_name);
- if (!read_ref(refname, short_objectname))
+ if (ref_exists(refname))
break;
}
}
free(short_name);
- return xstrdup(ref);
+ return xstrdup(refname);
}