#include "commit.h"
#include "tree.h"
#include "blob.h"
+#include "tree-walk.h"
+#include "refs.h"
static int find_short_object_filename(int len, const char *name, unsigned char *sha1)
{
int cmp;
nth_packed_object_sha1(p, mid, now);
- cmp = memcmp(match, now, 20);
+ cmp = hashcmp(match, now);
if (!cmp) {
first = mid;
break;
!match_sha(len, match, next)) {
/* unique within this pack */
if (!found) {
- memcpy(found_sha1, now, 20);
+ hashcpy(found_sha1, now);
found++;
}
- else if (memcmp(found_sha1, now, 20)) {
+ else if (hashcmp(found_sha1, now)) {
found = 2;
break;
}
}
}
if (found == 1)
- memcpy(sha1, found_sha1, 20);
+ hashcpy(sha1, found_sha1);
return found;
}
if (1 < has_unpacked || 1 < has_packed)
return SHORT_NAME_AMBIGUOUS;
if (has_unpacked != has_packed) {
- memcpy(sha1, (has_packed ? packed_sha1 : unpacked_sha1), 20);
+ hashcpy(sha1, (has_packed ? packed_sha1 : unpacked_sha1));
return 0;
}
/* Both have unique ones -- do they match? */
- if (memcmp(packed_sha1, unpacked_sha1, 20))
- return -2;
- memcpy(sha1, packed_sha1, 20);
+ if (hashcmp(packed_sha1, unpacked_sha1))
+ return SHORT_NAME_AMBIGUOUS;
+ hashcpy(sha1, packed_sha1);
return 0;
}
char canonical[40];
unsigned char res[20];
- if (len < 4)
+ if (len < MINIMUM_ABBREV || len > 40)
return -1;
- memset(res, 0, 20);
+ hashclr(res);
memset(canonical, 'x', 40);
for (i = 0; i < len ;i++) {
unsigned char c = name[i];
const char *find_unique_abbrev(const unsigned char *sha1, int len)
{
- int status;
+ int status, is_null;
static char hex[41];
+
+ is_null = is_null_sha1(sha1);
memcpy(hex, sha1_to_hex(sha1), 40);
+ if (len == 40 || !len)
+ return hex;
while (len < 40) {
unsigned char sha1_ret[20];
status = get_short_sha1(hex, len, sha1_ret, 1);
- if (!status) {
+ if (!status ||
+ (is_null && status != SHORT_NAME_AMBIGUOUS)) {
hex[len] = 0;
return hex;
}
return NULL;
}
-static int ambiguous_path(const char *path)
+static int ambiguous_path(const char *path, int len)
{
int slash = 1;
+ int cnt;
- for (;;) {
+ for (cnt = 0; cnt < len; cnt++) {
switch (*path++) {
case '\0':
break;
slash = 0;
continue;
}
- return slash;
+ break;
}
+ return slash;
}
static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
{
- static const char *prefix[] = {
- "",
- "refs",
- "refs/tags",
- "refs/heads",
+ static const char *fmt[] = {
+ "%.*s",
+ "refs/%.*s",
+ "refs/tags/%.*s",
+ "refs/heads/%.*s",
+ "refs/remotes/%.*s",
+ "refs/remotes/%.*s/HEAD",
NULL
};
- const char **p;
- int found = 0;
+ static const char *warning = "warning: refname '%.*s' is ambiguous.\n";
+ const char **p, *ref;
+ char *real_ref = NULL;
+ int refs_found = 0;
+ int at, reflog_len;
+ unsigned char *this_result;
+ unsigned char sha1_from_ref[20];
if (len == 40 && !get_sha1_hex(str, sha1))
return 0;
+ /* basic@{time or number} format to query ref-log */
+ reflog_len = at = 0;
+ if (str[len-1] == '}') {
+ for (at = 1; at < len - 1; at++) {
+ if (str[at] == '@' && str[at+1] == '{') {
+ reflog_len = (len-1) - (at+2);
+ len = at;
+ break;
+ }
+ }
+ }
+
/* Accept only unambiguous ref paths. */
- if (ambiguous_path(str))
+ if (ambiguous_path(str, len))
return -1;
- for (p = prefix; *p; p++) {
- char *pathname = git_path("%s/%.*s", *p, len, str);
- if (!read_ref(pathname, sha1)) {
- /* Must be unique; i.e. when heads/foo and
- * tags/foo are both present, reject "foo".
- * Note that read_ref() eventually calls
- * get_sha1_hex() which can smudge initial
- * part of the buffer even if what is read
- * is found to be invalid halfway.
- */
- if (1 < found++)
- return -1;
+ for (p = fmt; *p; p++) {
+ this_result = refs_found ? sha1_from_ref : sha1;
+ ref = resolve_ref(mkpath(*p, len, str), this_result, 1, NULL);
+ if (ref) {
+ if (!refs_found++)
+ real_ref = xstrdup(ref);
+ if (!warn_ambiguous_refs)
+ break;
}
}
- if (found == 1)
- return 0;
- return -1;
+
+ if (!refs_found)
+ return -1;
+
+ if (warn_ambiguous_refs && refs_found > 1)
+ fprintf(stderr, warning, len, str);
+
+ if (reflog_len) {
+ /* Is it asking for N-th entry, or approxidate? */
+ int nth, i;
+ unsigned long at_time;
+ for (i = nth = 0; 0 <= nth && i < reflog_len; i++) {
+ char ch = str[at+2+i];
+ if ('0' <= ch && ch <= '9')
+ nth = nth * 10 + ch - '0';
+ else
+ nth = -1;
+ }
+ if (0 <= nth)
+ at_time = 0;
+ else
+ at_time = approxidate(str + at + 2);
+ read_ref_at(real_ref, at_time, nth, sha1);
+ }
+
+ free(real_ref);
+ return 0;
}
static int get_sha1_1(const char *name, int len, unsigned char *sha1);
if (parse_commit(commit))
return -1;
if (!idx) {
- memcpy(result, commit->object.sha1, 20);
+ hashcpy(result, commit->object.sha1);
return 0;
}
p = commit->parents;
while (p) {
if (!--idx) {
- memcpy(result, p->item->object.sha1, 20);
+ hashcpy(result, p->item->object.sha1);
return 0;
}
p = p->next;
if (!commit || parse_commit(commit) || !commit->parents)
return -1;
- memcpy(sha1, commit->parents->item->object.sha1, 20);
+ hashcpy(sha1, commit->parents->item->object.sha1);
}
- memcpy(result, sha1, 20);
+ hashcpy(result, sha1);
return 0;
}
{
unsigned char outer[20];
const char *sp;
- const char *type_string = NULL;
+ unsigned int expected_type = 0;
struct object *o;
/*
sp++; /* beginning of type name, or closing brace for empty */
if (!strncmp(commit_type, sp, 6) && sp[6] == '}')
- type_string = commit_type;
+ expected_type = OBJ_COMMIT;
else if (!strncmp(tree_type, sp, 4) && sp[4] == '}')
- type_string = tree_type;
+ expected_type = OBJ_TREE;
else if (!strncmp(blob_type, sp, 4) && sp[4] == '}')
- type_string = blob_type;
+ expected_type = OBJ_BLOB;
else if (sp[0] == '}')
- type_string = NULL;
+ expected_type = OBJ_NONE;
else
return -1;
o = parse_object(outer);
if (!o)
return -1;
- if (!type_string) {
+ if (!expected_type) {
o = deref_tag(o, name, sp - name - 2);
if (!o || (!o->parsed && !parse_object(o->sha1)))
return -1;
- memcpy(sha1, o->sha1, 20);
+ hashcpy(sha1, o->sha1);
}
else {
/* At this point, the syntax look correct, so
while (1) {
if (!o || (!o->parsed && !parse_object(o->sha1)))
return -1;
- if (o->type == type_string) {
- memcpy(sha1, o->sha1, 20);
+ if (o->type == expected_type) {
+ hashcpy(sha1, o->sha1);
return 0;
}
- if (o->type == tag_type)
+ if (o->type == OBJ_TAG)
o = ((struct tag*) o)->tagged;
- else if (o->type == commit_type)
+ else if (o->type == OBJ_COMMIT)
o = &(((struct commit *) o)->tree->object);
else
return error("%.*s: expected %s type, but the object dereferences to %s type",
- len, name, type_string,
- o->type);
+ len, name, typename(expected_type),
+ typename(o->type));
if (!o->parsed)
parse_object(o->sha1);
}
return 0;
}
-static int get_sha1_1(const char *name, int len, unsigned char *sha1)
+static int get_describe_name(const char *name, int len, unsigned char *sha1)
{
- int parent, ret;
const char *cp;
- /* foo^[0-9] or foo^ (== foo^1); we do not do more than 9 parents. */
- if (len > 2 && name[len-2] == '^' &&
- name[len-1] >= '0' && name[len-1] <= '9') {
- parent = name[len-1] - '0';
- len -= 2;
+ for (cp = name + len - 1; name + 2 <= cp; cp--) {
+ char ch = *cp;
+ if (hexval(ch) & ~0377) {
+ /* We must be looking at g in "SOMETHING-g"
+ * for it to be describe output.
+ */
+ if (ch == 'g' && cp[-1] == '-') {
+ cp++;
+ len -= cp - name;
+ return get_short_sha1(cp, len, sha1, 1);
+ }
+ }
}
- else if (len > 1 && name[len-1] == '^') {
- parent = 1;
- len--;
- } else
- parent = -1;
+ return -1;
+}
- if (parent >= 0)
- return get_parent(name, len, sha1, parent);
+static int get_sha1_1(const char *name, int len, unsigned char *sha1)
+{
+ int ret, has_suffix;
+ const char *cp;
/* "name~3" is "name^^^",
- * "name~12" is "name^^^^^^^^^^^^", and
* "name~" and "name~0" are name -- not "name^0"!
+ * "name^" is not "name^0"; it is "name^1".
*/
- parent = 0;
+ has_suffix = 0;
for (cp = name + len - 1; name <= cp; cp--) {
int ch = *cp;
if ('0' <= ch && ch <= '9')
continue;
- if (ch != '~')
- parent = -1;
+ if (ch == '~' || ch == '^')
+ has_suffix = ch;
break;
}
- if (!parent && *cp == '~') {
+
+ if (has_suffix) {
+ int num = 0;
int len1 = cp - name;
cp++;
while (cp < name + len)
- parent = parent * 10 + *cp++ - '0';
- return get_nth_ancestor(name, len1, sha1, parent);
+ num = num * 10 + *cp++ - '0';
+ if (has_suffix == '^') {
+ if (!num && len1 == len - 1)
+ num = 1;
+ return get_parent(name, len1, sha1, num);
+ }
+ /* else if (has_suffix == '~') -- goes without saying */
+ return get_nth_ancestor(name, len1, sha1, num);
}
ret = peel_onion(name, len, sha1);
ret = get_sha1_basic(name, len, sha1);
if (!ret)
return 0;
+
+ /* It could be describe output that is "SOMETHING-gXXXX" */
+ ret = get_describe_name(name, len, sha1);
+ if (!ret)
+ return 0;
+
return get_short_sha1(name, len, sha1, 0);
}
*/
int get_sha1(const char *name, unsigned char *sha1)
{
+ int ret, bracket_depth;
+ unsigned unused;
+ int namelen = strlen(name);
+ const char *cp;
+
prepare_alt_odb();
- return get_sha1_1(name, strlen(name), sha1);
+ ret = get_sha1_1(name, namelen, sha1);
+ if (!ret)
+ return ret;
+ /* sha1:path --> object name of path in ent sha1
+ * :path -> object name of path in index
+ * :[0-3]:path -> object name of path in index at stage
+ */
+ if (name[0] == ':') {
+ int stage = 0;
+ struct cache_entry *ce;
+ int pos;
+ if (namelen < 3 ||
+ name[2] != ':' ||
+ name[1] < '0' || '3' < name[1])
+ cp = name + 1;
+ else {
+ stage = name[1] - '0';
+ cp = name + 3;
+ }
+ namelen = namelen - (cp - name);
+ if (!active_cache)
+ read_cache();
+ if (active_nr < 0)
+ return -1;
+ pos = cache_name_pos(cp, namelen);
+ if (pos < 0)
+ pos = -pos - 1;
+ while (pos < active_nr) {
+ ce = active_cache[pos];
+ if (ce_namelen(ce) != namelen ||
+ memcmp(ce->name, cp, namelen))
+ break;
+ if (ce_stage(ce) == stage) {
+ hashcpy(sha1, ce->sha1);
+ return 0;
+ }
+ pos++;
+ }
+ return -1;
+ }
+ for (cp = name, bracket_depth = 0; *cp; cp++) {
+ if (*cp == '{')
+ bracket_depth++;
+ else if (bracket_depth && *cp == '}')
+ bracket_depth--;
+ else if (!bracket_depth && *cp == ':')
+ break;
+ }
+ if (*cp == ':') {
+ unsigned char tree_sha1[20];
+ if (!get_sha1_1(name, cp-name, tree_sha1))
+ return get_tree_entry(tree_sha1, cp+1, sha1,
+ &unused);
+ }
+ return ret;
}