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-rw-r--r--refs.c657
1 files changed, 346 insertions, 311 deletions
diff --git a/refs.c b/refs.c
index a615043..2496d40 100644
--- a/refs.c
+++ b/refs.c
@@ -8,14 +8,18 @@
#define REF_KNOWS_PEELED 04
#define REF_BROKEN 010
-struct ref_list {
- struct ref_list *next;
+struct ref_entry {
unsigned char flag; /* ISSYMREF? ISPACKED? */
unsigned char sha1[20];
unsigned char peeled[20];
char name[FLEX_ARRAY];
};
+struct ref_array {
+ int nr, alloc;
+ struct ref_entry **refs;
+};
+
static const char *parse_ref_line(char *line, unsigned char *sha1)
{
/*
@@ -44,108 +48,86 @@ static const char *parse_ref_line(char *line, unsigned char *sha1)
return line;
}
-static struct ref_list *add_ref(const char *name, const unsigned char *sha1,
- int flag, struct ref_list *list,
- struct ref_list **new_entry)
+static void add_ref(const char *name, const unsigned char *sha1,
+ int flag, struct ref_array *refs,
+ struct ref_entry **new_entry)
{
int len;
- struct ref_list *entry;
+ struct ref_entry *entry;
/* Allocate it and add it in.. */
len = strlen(name) + 1;
- entry = xmalloc(sizeof(struct ref_list) + len);
+ entry = xmalloc(sizeof(struct ref_entry) + len);
hashcpy(entry->sha1, sha1);
hashclr(entry->peeled);
+ if (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;
- entry->next = list;
if (new_entry)
*new_entry = entry;
- return entry;
+ ALLOC_GROW(refs->refs, refs->nr + 1, refs->alloc);
+ refs->refs[refs->nr++] = entry;
}
-/* merge sort the ref list */
-static struct ref_list *sort_ref_list(struct ref_list *list)
+static int ref_entry_cmp(const void *a, const void *b)
{
- int psize, qsize, last_merge_count, cmp;
- struct ref_list *p, *q, *l, *e;
- struct ref_list *new_list = list;
- int k = 1;
- int merge_count = 0;
+ struct ref_entry *one = *(struct ref_entry **)a;
+ struct ref_entry *two = *(struct ref_entry **)b;
+ return strcmp(one->name, two->name);
+}
- if (!list)
- return list;
+static void sort_ref_array(struct ref_array *array)
+{
+ int i = 0, j = 1;
- do {
- last_merge_count = merge_count;
- merge_count = 0;
+ /* Nothing to sort unless there are at least two entries */
+ if (array->nr < 2)
+ return;
- psize = 0;
+ qsort(array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp);
- p = new_list;
- q = new_list;
- new_list = NULL;
- l = NULL;
+ /* 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;
+}
- while (p) {
- merge_count++;
+static struct ref_entry *search_ref_array(struct ref_array *array, const char *name)
+{
+ struct ref_entry *e, **r;
+ int len;
- while (psize < k && q->next) {
- q = q->next;
- psize++;
- }
- qsize = k;
-
- while ((psize > 0) || (qsize > 0 && q)) {
- if (qsize == 0 || !q) {
- e = p;
- p = p->next;
- psize--;
- } else if (psize == 0) {
- e = q;
- q = q->next;
- qsize--;
- } else {
- cmp = strcmp(q->name, p->name);
- if (cmp < 0) {
- e = q;
- q = q->next;
- qsize--;
- } else if (cmp > 0) {
- e = p;
- p = p->next;
- psize--;
- } else {
- if (hashcmp(q->sha1, p->sha1))
- die("Duplicated ref, and SHA1s don't match: %s",
- q->name);
- warning("Duplicated ref: %s", q->name);
- e = q;
- q = q->next;
- qsize--;
- free(e);
- e = p;
- p = p->next;
- psize--;
- }
- }
+ if (name == NULL)
+ return NULL;
- e->next = NULL;
+ if (!array->nr)
+ return NULL;
- if (l)
- l->next = e;
- if (!new_list)
- new_list = e;
- l = e;
- }
+ len = strlen(name) + 1;
+ e = xmalloc(sizeof(struct ref_entry) + len);
+ memcpy(e->name, name, len);
+
+ r = bsearch(&e, array->refs, array->nr, sizeof(*array->refs), ref_entry_cmp);
- p = q;
- };
+ free(e);
- k = k * 2;
- } while ((last_merge_count != merge_count) || (last_merge_count != 1));
+ if (r == NULL)
+ return NULL;
- return new_list;
+ return *r;
}
/*
@@ -153,40 +135,85 @@ static struct ref_list *sort_ref_list(struct ref_list *list)
* when doing a full libification.
*/
static struct cached_refs {
+ struct cached_refs *next;
char did_loose;
char did_packed;
- struct ref_list *loose;
- struct ref_list *packed;
-} cached_refs, submodule_refs;
-static struct ref_list *current_ref;
+ struct ref_array loose;
+ struct ref_array packed;
+ /* The submodule name, or "" for the main repo. */
+ char name[FLEX_ARRAY];
+} *cached_refs;
+
+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 struct ref_list *extra_refs;
+static void clear_cached_refs(struct cached_refs *ca)
+{
+ if (ca->did_loose)
+ free_ref_array(&ca->loose);
+ if (ca->did_packed)
+ free_ref_array(&ca->packed);
+ ca->did_loose = ca->did_packed = 0;
+}
-static void free_ref_list(struct ref_list *list)
+static struct cached_refs *create_cached_refs(const char *submodule)
{
- struct ref_list *next;
- for ( ; list; list = next) {
- next = list->next;
- free(list);
+ int len;
+ struct cached_refs *refs;
+ if (!submodule)
+ submodule = "";
+ len = strlen(submodule) + 1;
+ refs = xcalloc(1, sizeof(struct cached_refs) + len);
+ memcpy(refs->name, submodule, len);
+ return refs;
+}
+
+/*
+ * Return a pointer to a cached_refs for the specified submodule. For
+ * the main repository, use submodule==NULL. The returned structure
+ * will be allocated and initialized but not necessarily populated; it
+ * should not be freed.
+ */
+static struct cached_refs *get_cached_refs(const char *submodule)
+{
+ struct cached_refs *refs = cached_refs;
+ if (!submodule)
+ submodule = "";
+ while (refs) {
+ if (!strcmp(submodule, refs->name))
+ return refs;
+ refs = refs->next;
}
+
+ refs = create_cached_refs(submodule);
+ refs->next = cached_refs;
+ cached_refs = refs;
+ return refs;
}
static void invalidate_cached_refs(void)
{
- struct cached_refs *ca = &cached_refs;
-
- if (ca->did_loose && ca->loose)
- free_ref_list(ca->loose);
- if (ca->did_packed && ca->packed)
- free_ref_list(ca->packed);
- ca->loose = ca->packed = NULL;
- ca->did_loose = ca->did_packed = 0;
+ struct cached_refs *refs = cached_refs;
+ while (refs) {
+ clear_cached_refs(refs);
+ refs = refs->next;
+ }
}
-static void read_packed_refs(FILE *f, struct cached_refs *cached_refs)
+static void read_packed_refs(FILE *f, struct ref_array *array)
{
- struct ref_list *list = NULL;
- struct ref_list *last = NULL;
+ struct ref_entry *last = NULL;
char refline[PATH_MAX];
int flag = REF_ISPACKED;
@@ -205,7 +232,7 @@ static void read_packed_refs(FILE *f, struct cached_refs *cached_refs)
name = parse_ref_line(refline, sha1);
if (name) {
- list = add_ref(name, sha1, flag, list, &last);
+ add_ref(name, sha1, flag, array, &last);
continue;
}
if (last &&
@@ -215,48 +242,43 @@ static void read_packed_refs(FILE *f, struct cached_refs *cached_refs)
!get_sha1_hex(refline + 1, sha1))
hashcpy(last->peeled, sha1);
}
- cached_refs->packed = sort_ref_list(list);
+ sort_ref_array(array);
}
void add_extra_ref(const char *name, const unsigned char *sha1, int flag)
{
- extra_refs = add_ref(name, sha1, flag, extra_refs, NULL);
+ add_ref(name, sha1, flag, &extra_refs, NULL);
}
void clear_extra_refs(void)
{
- free_ref_list(extra_refs);
- extra_refs = NULL;
+ free_ref_array(&extra_refs);
}
-static struct ref_list *get_packed_refs(const char *submodule)
+static struct ref_array *get_packed_refs(const char *submodule)
{
- const char *packed_refs_file;
- struct cached_refs *refs;
+ struct cached_refs *refs = get_cached_refs(submodule);
- if (submodule) {
- packed_refs_file = git_path_submodule(submodule, "packed-refs");
- refs = &submodule_refs;
- free_ref_list(refs->packed);
- } else {
- packed_refs_file = git_path("packed-refs");
- refs = &cached_refs;
- }
+ if (!refs->did_packed) {
+ const char *packed_refs_file;
+ FILE *f;
- if (!refs->did_packed || submodule) {
- FILE *f = fopen(packed_refs_file, "r");
- refs->packed = NULL;
+ if (submodule)
+ packed_refs_file = git_path_submodule(submodule, "packed-refs");
+ else
+ packed_refs_file = git_path("packed-refs");
+ f = fopen(packed_refs_file, "r");
if (f) {
- read_packed_refs(f, refs);
+ read_packed_refs(f, &refs->packed);
fclose(f);
}
refs->did_packed = 1;
}
- return refs->packed;
+ return &refs->packed;
}
-static struct ref_list *get_ref_dir(const char *submodule, const char *base,
- struct ref_list *list)
+static void get_ref_dir(const char *submodule, const char *base,
+ struct ref_array *array)
{
DIR *dir;
const char *path;
@@ -299,7 +321,7 @@ static struct ref_list *get_ref_dir(const char *submodule, const char *base,
if (stat(refdir, &st) < 0)
continue;
if (S_ISDIR(st.st_mode)) {
- list = get_ref_dir(submodule, ref, list);
+ get_ref_dir(submodule, ref, array);
continue;
}
if (submodule) {
@@ -314,12 +336,11 @@ static struct ref_list *get_ref_dir(const char *submodule, const char *base,
hashclr(sha1);
flag |= REF_BROKEN;
}
- list = add_ref(ref, sha1, flag, list, NULL);
+ add_ref(ref, sha1, flag, array, NULL);
}
free(ref);
closedir(dir);
}
- return sort_ref_list(list);
}
struct warn_if_dangling_data {
@@ -356,49 +377,43 @@ void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refname)
for_each_rawref(warn_if_dangling_symref, &data);
}
-static struct ref_list *get_loose_refs(const char *submodule)
+static struct ref_array *get_loose_refs(const char *submodule)
{
- if (submodule) {
- free_ref_list(submodule_refs.loose);
- submodule_refs.loose = get_ref_dir(submodule, "refs", NULL);
- return submodule_refs.loose;
- }
+ struct cached_refs *refs = get_cached_refs(submodule);
- if (!cached_refs.did_loose) {
- cached_refs.loose = get_ref_dir(NULL, "refs", NULL);
- cached_refs.did_loose = 1;
+ if (!refs->did_loose) {
+ get_ref_dir(submodule, "refs", &refs->loose);
+ sort_ref_array(&refs->loose);
+ refs->did_loose = 1;
}
- return cached_refs.loose;
+ return &refs->loose;
}
/* We allow "recursive" symbolic refs. Only within reason, though */
#define MAXDEPTH 5
#define MAXREFLEN (1024)
+/*
+ * 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.
+ */
static int resolve_gitlink_packed_ref(char *name, int pathlen, const char *refname, unsigned char *result)
{
- FILE *f;
- struct cached_refs refs;
- struct ref_list *ref;
- int retval;
+ int retval = -1;
+ struct ref_entry *ref;
+ struct ref_array *array;
- strcpy(name + pathlen, "packed-refs");
- f = fopen(name, "r");
- if (!f)
- return -1;
- read_packed_refs(f, &refs);
- fclose(f);
- ref = refs.packed;
- retval = -1;
- while (ref) {
- if (!strcmp(ref->name, refname)) {
- retval = 0;
- memcpy(result, ref->sha1, 20);
- break;
- }
- ref = ref->next;
+ /* 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;
}
- free_ref_list(refs.packed);
return retval;
}
@@ -466,29 +481,35 @@ int resolve_gitlink_ref(const char *path, const char *refname, unsigned char *re
}
/*
- * If the "reading" argument is set, this function finds out what _object_
- * the ref points at by "reading" the ref. The ref, if it is not symbolic,
- * has to exist, and if it is symbolic, it has to point at an existing ref,
- * because the "read" goes through the symref to the ref it points at.
- *
- * The access that is not "reading" may often be "writing", but does not
- * have to; it can be merely checking _where it leads to_. If it is a
- * prelude to "writing" to the ref, a write to a symref that points at
- * yet-to-be-born ref will create the real ref pointed by the symref.
- * reading=0 allows the caller to check where such a symref leads to.
+ * 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)
+{
+ struct ref_array *packed = get_packed_refs(NULL);
+ struct ref_entry *entry = search_ref_array(packed, ref);
+ if (entry) {
+ hashcpy(sha1, entry->sha1);
+ return 0;
+ }
+ return -1;
+}
+
const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *flag)
{
int depth = MAXDEPTH;
ssize_t len;
char buffer[256];
static char ref_buffer[256];
+ char path[PATH_MAX];
if (flag)
*flag = 0;
+ if (check_refname_format(ref, REFNAME_ALLOW_ONELEVEL))
+ return NULL;
+
for (;;) {
- char path[PATH_MAX];
struct stat st;
char *buf;
int fd;
@@ -497,29 +518,36 @@ const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *
return NULL;
git_snpath(path, sizeof(path), "%s", ref);
- /* Special case: non-existing file. */
+
if (lstat(path, &st) < 0) {
- struct ref_list *list = get_packed_refs(NULL);
- while (list) {
- if (!strcmp(ref, list->name)) {
- hashcpy(sha1, list->sha1);
- if (flag)
- *flag |= REF_ISPACKED;
- return ref;
- }
- list = list->next;
+ if (errno != ENOENT)
+ return NULL;
+ /*
+ * The loose reference file does not exist;
+ * check for a packed reference.
+ */
+ if (!get_packed_ref(ref, sha1)) {
+ if (flag)
+ *flag |= REF_ISPACKED;
+ return ref;
}
- if (reading || errno != ENOENT)
+ /* The reference is not a packed reference, either. */
+ if (reading) {
return NULL;
- hashclr(sha1);
- return ref;
+ } else {
+ hashclr(sha1);
+ return ref;
+ }
}
/* Follow "normalized" - ie "refs/.." symlinks by hand */
if (S_ISLNK(st.st_mode)) {
len = readlink(path, buffer, sizeof(buffer)-1);
- if (len >= 5 && !memcmp("refs/", buffer, 5)) {
- buffer[len] = 0;
+ if (len < 0)
+ return NULL;
+ buffer[len] = 0;
+ if (!prefixcmp(buffer, "refs/") &&
+ !check_refname_format(buffer, 0)) {
strcpy(ref_buffer, buffer);
ref = ref_buffer;
if (flag)
@@ -543,26 +571,34 @@ const char *resolve_ref(const char *ref, unsigned char *sha1, int reading, int *
return NULL;
len = read_in_full(fd, buffer, sizeof(buffer)-1);
close(fd);
+ if (len < 0)
+ return NULL;
+ while (len && isspace(buffer[len-1]))
+ len--;
+ buffer[len] = '\0';
/*
* Is it a symbolic ref?
*/
- if (len < 4 || memcmp("ref:", buffer, 4))
+ if (prefixcmp(buffer, "ref:"))
break;
buf = buffer + 4;
- len -= 4;
- while (len && isspace(*buf))
- buf++, len--;
- while (len && isspace(buf[len-1]))
- len--;
- buf[len] = 0;
- memcpy(ref_buffer, buf, len + 1);
- ref = ref_buffer;
+ while (isspace(*buf))
+ buf++;
+ if (check_refname_format(buf, REFNAME_ALLOW_ONELEVEL)) {
+ warning("symbolic reference in %s is formatted incorrectly",
+ path);
+ return NULL;
+ }
+ ref = strcpy(ref_buffer, buf);
if (flag)
*flag |= REF_ISSYMREF;
}
- if (len < 40 || get_sha1_hex(buffer, sha1))
+ /* Please note that FETCH_HEAD has a second line containing other data. */
+ if (get_sha1_hex(buffer, sha1) || (buffer[40] != '\0' && !isspace(buffer[40]))) {
+ warning("reference in %s is formatted incorrectly", path);
return NULL;
+ }
return ref;
}
@@ -582,7 +618,7 @@ int read_ref(const char *ref, unsigned char *sha1)
#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_list *entry)
+ int flags, void *cb_data, struct ref_entry *entry)
{
if (prefixcmp(entry->name, base))
return 0;
@@ -628,18 +664,12 @@ int peel_ref(const char *ref, unsigned char *sha1)
return -1;
if ((flag & REF_ISPACKED)) {
- struct ref_list *list = get_packed_refs(NULL);
+ struct ref_array *array = get_packed_refs(NULL);
+ struct ref_entry *r = search_ref_array(array, ref);
- while (list) {
- if (!strcmp(list->name, ref)) {
- if (list->flag & REF_KNOWS_PEELED) {
- hashcpy(sha1, list->peeled);
- return 0;
- }
- /* older pack-refs did not leave peeled ones */
- break;
- }
- list = list->next;
+ if (r != NULL && r->flag & REF_KNOWS_PEELED) {
+ hashcpy(sha1, r->peeled);
+ return 0;
}
}
@@ -658,36 +688,39 @@ fallback:
static int do_for_each_ref(const char *submodule, const char *base, each_ref_fn fn,
int trim, int flags, void *cb_data)
{
- int retval = 0;
- struct ref_list *packed = get_packed_refs(submodule);
- struct ref_list *loose = get_loose_refs(submodule);
+ 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 ref_list *extra;
+ struct ref_array *extra = &extra_refs;
- for (extra = extra_refs; extra; extra = extra->next)
- retval = do_one_ref(base, fn, trim, flags, cb_data, extra);
+ for (i = 0; i < extra->nr; i++)
+ retval = do_one_ref(base, fn, trim, flags, cb_data, extra->refs[i]);
- while (packed && loose) {
- struct ref_list *entry;
- int cmp = strcmp(packed->name, loose->name);
+ while (p < packed->nr && l < loose->nr) {
+ struct ref_entry *entry;
+ int cmp = strcmp(packed->refs[p]->name, loose->refs[l]->name);
if (!cmp) {
- packed = packed->next;
+ p++;
continue;
}
if (cmp > 0) {
- entry = loose;
- loose = loose->next;
+ entry = loose->refs[l++];
} else {
- entry = packed;
- packed = packed->next;
+ entry = packed->refs[p++];
}
retval = do_one_ref(base, fn, trim, flags, cb_data, entry);
if (retval)
goto end_each;
}
- for (packed = packed ? packed : loose; packed; packed = packed->next) {
- retval = do_one_ref(base, fn, trim, flags, cb_data, packed);
+ if (l < loose->nr) {
+ p = l;
+ packed = loose;
+ }
+
+ for (; p < packed->nr; p++) {
+ retval = do_one_ref(base, fn, trim, flags, cb_data, packed->refs[p]);
if (retval)
goto end_each;
}
@@ -860,70 +893,87 @@ int for_each_rawref(each_ref_fn fn, void *cb_data)
* - 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 == '[') /* Unsupported */
+ if (ch == '*' || ch == '?' || ch == '[') /* Unsupported */
return 1;
- if (ch == '*') /* Supported at the end */
- return 2;
return 0;
}
-int check_ref_format(const char *ref)
+/*
+ * 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)
{
- int ch, level, bad_type, last;
- int ret = CHECK_REF_FORMAT_OK;
- const char *cp = ref;
-
- level = 0;
- while (1) {
- while ((ch = *cp++) == '/')
- ; /* tolerate duplicated slashes */
- if (!ch)
- /* should not end with slashes */
- return CHECK_REF_FORMAT_ERROR;
-
- /* we are at the beginning of the path component */
- if (ch == '.')
- return CHECK_REF_FORMAT_ERROR;
- bad_type = bad_ref_char(ch);
- if (bad_type) {
- if (bad_type == 2 && (!*cp || *cp == '/') &&
- ret == CHECK_REF_FORMAT_OK)
- ret = CHECK_REF_FORMAT_WILDCARD;
- else
- return CHECK_REF_FORMAT_ERROR;
- }
+ 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;
- /* scan the rest of the path component */
- while ((ch = *cp++) != 0) {
- bad_type = bad_ref_char(ch);
- if (bad_type)
- return CHECK_REF_FORMAT_ERROR;
- if (ch == '/')
- break;
- if (last == '.' && ch == '.')
- return CHECK_REF_FORMAT_ERROR;
- if (last == '@' && ch == '{')
- return CHECK_REF_FORMAT_ERROR;
- last = ch;
- }
- level++;
- if (!ch) {
- if (ref <= cp - 2 && cp[-2] == '.')
- return CHECK_REF_FORMAT_ERROR;
- if (level < 2)
- return CHECK_REF_FORMAT_ONELEVEL;
- if (has_extension(ref, ".lock"))
- return CHECK_REF_FORMAT_ERROR;
- return ret;
+ }
+ 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)
@@ -1003,24 +1053,24 @@ static int remove_empty_directories(const char *file)
}
static int is_refname_available(const char *ref, const char *oldref,
- struct ref_list *list, int quiet)
-{
- int namlen = strlen(ref); /* e.g. 'foo/bar' */
- while (list) {
- /* list->name could be 'foo' or 'foo/bar/baz' */
- if (!oldref || strcmp(oldref, list->name)) {
- int len = strlen(list->name);
+ 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) ? list->name : ref;
- if (!strncmp(ref, list->name, cmplen) &&
+ const char *lead = (namlen < len) ? entry->name : ref;
+ if (!strncmp(ref, entry->name, cmplen) &&
lead[cmplen] == '/') {
if (!quiet)
error("'%s' exists; cannot create '%s'",
- list->name, ref);
+ entry->name, ref);
return 0;
}
}
- list = list->next;
}
return 1;
}
@@ -1106,7 +1156,7 @@ static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char
struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1)
{
char refpath[PATH_MAX];
- if (check_ref_format(ref))
+ if (check_refname_format(ref, 0))
return NULL;
strcpy(refpath, mkpath("refs/%s", ref));
return lock_ref_sha1_basic(refpath, old_sha1, 0, NULL);
@@ -1114,31 +1164,22 @@ struct ref_lock *lock_ref_sha1(const char *ref, const unsigned char *old_sha1)
struct ref_lock *lock_any_ref_for_update(const char *ref, const unsigned char *old_sha1, int flags)
{
- switch (check_ref_format(ref)) {
- default:
+ if (check_refname_format(ref, REFNAME_ALLOW_ONELEVEL))
return NULL;
- case 0:
- case CHECK_REF_FORMAT_ONELEVEL:
- return lock_ref_sha1_basic(ref, old_sha1, flags, NULL);
- }
+ return lock_ref_sha1_basic(ref, old_sha1, flags, NULL);
}
static struct lock_file packlock;
static int repack_without_ref(const char *refname)
{
- struct ref_list *list, *packed_ref_list;
- int fd;
- int found = 0;
+ struct ref_array *packed;
+ struct ref_entry *ref;
+ int fd, i;
- packed_ref_list = get_packed_refs(NULL);
- for (list = packed_ref_list; list; list = list->next) {
- if (!strcmp(refname, list->name)) {
- found = 1;
- break;
- }
- }
- if (!found)
+ packed = get_packed_refs(NULL);
+ ref = search_ref_array(packed, refname);
+ if (ref == NULL)
return 0;
fd = hold_lock_file_for_update(&packlock, git_path("packed-refs"), 0);
if (fd < 0) {
@@ -1146,17 +1187,19 @@ static int repack_without_ref(const char *refname)
return error("cannot delete '%s' from packed refs", refname);
}
- for (list = packed_ref_list; list; list = list->next) {
+ for (i = 0; i < packed->nr; i++) {
char line[PATH_MAX + 100];
int len;
- if (!strcmp(refname, list->name))
+ ref = packed->refs[i];
+
+ if (!strcmp(refname, ref->name))
continue;
len = snprintf(line, sizeof(line), "%s %s\n",
- sha1_to_hex(list->sha1), list->name);
+ 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'", list->name);
+ die("too long a refname '%s'", ref->name);
write_or_die(fd, line, len);
}
return commit_lock_file(&packlock);
@@ -1211,7 +1254,6 @@ int delete_ref(const char *refname, const unsigned char *sha1, int delopt)
int rename_ref(const char *oldref, const char *newref, const char *logmsg)
{
- static const char renamed_ref[] = "RENAMED-REF";
unsigned char sha1[20], orig_sha1[20];
int flag = 0, logmoved = 0;
struct ref_lock *lock;
@@ -1235,13 +1277,6 @@ int rename_ref(const char *oldref, const char *newref, const char *logmsg)
if (!is_refname_available(newref, oldref, get_loose_refs(NULL), 0))
return 1;
- lock = lock_ref_sha1_basic(renamed_ref, NULL, 0, NULL);
- if (!lock)
- return error("unable to lock %s", renamed_ref);
- lock->force_write = 1;
- if (write_ref_sha1(lock, orig_sha1, logmsg))
- return error("unable to save current sha1 in %s", renamed_ref);
-
if (log && rename(git_path("logs/%s", oldref), git_path(TMP_RENAMED_LOG)))
return error("unable to move logfile logs/%s to "TMP_RENAMED_LOG": %s",
oldref, strerror(errno));
@@ -1851,7 +1886,7 @@ int update_ref(const char *action, const char *refname,
return 0;
}
-int ref_exists(char *refname)
+int ref_exists(const char *refname)
{
unsigned char sha1[20];
return !!resolve_ref(refname, sha1, 1, NULL);