static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
{
static const char *warn_msg = "refname '%.*s' is ambiguous.";
+ static const char *object_name_msg = N_(
+ "Git normally never creates a ref that ends with 40 hex characters\n"
+ "because it will be ignored when you just specify 40-hex. These refs\n"
+ "may be created by mistake. For example,\n"
+ "\n"
+ " git checkout -b $br $(git rev-parse ...)\n"
+ "\n"
+ "where \"$br\" is somehow empty and a 40-hex ref is created. Please\n"
+ "examine these refs and maybe delete them. Turn this message off by\n"
+ "running \"git config advice.object_name_warning false\"");
+ unsigned char tmp_sha1[20];
char *real_ref = NULL;
int refs_found = 0;
int at, reflog_len;
- if (len == 40 && !get_sha1_hex(str, sha1))
+ if (len == 40 && !get_sha1_hex(str, sha1)) {
+ if (warn_on_object_refname_ambiguity) {
+ refs_found = dwim_ref(str, len, tmp_sha1, &real_ref);
+ if (refs_found > 0 && warn_ambiguous_refs) {
+ warning(warn_msg, len, str);
+ if (advice_object_name_warning)
+ fprintf(stderr, "%s\n", _(object_name_msg));
+ }
+ free(real_ref);
+ }
return 0;
+ }
/* basic@{time or number or -number} format to query ref-log */
reflog_len = at = 0;
if (!refs_found)
return -1;
- if (warn_ambiguous_refs && refs_found > 1)
+ if (warn_ambiguous_refs &&
+ (refs_found > 1 ||
+ !get_short_sha1(str, len, tmp_sha1, GET_SHA1_QUIETLY)))
warning(warn_msg, len, str);
if (reflog_len) {
while (1) {
if (!o || (!o->parsed && !parse_object(o->sha1)))
return NULL;
- if (o->type == expected_type)
+ if (expected_type == OBJ_ANY || o->type == expected_type)
return o;
if (o->type == OBJ_TAG)
o = ((struct tag*) o)->tagged;
expected_type = OBJ_TREE;
else if (!strncmp(blob_type, sp, 4) && sp[4] == '}')
expected_type = OBJ_BLOB;
+ else if (!prefixcmp(sp, "object}"))
+ expected_type = OBJ_ANY;
else if (sp[0] == '}')
expected_type = OBJ_NONE;
else if (sp[0] == '/')
if (expected_type == OBJ_COMMIT)
lookup_flags = GET_SHA1_COMMITTISH;
+ else if (expected_type == OBJ_TREE)
+ lookup_flags = GET_SHA1_TREEISH;
if (get_sha1_1(name, sp - name - 2, outer, lookup_flags))
return -1;
}
struct grab_nth_branch_switch_cbdata {
- long cnt, alloc;
- struct strbuf *buf;
+ int remaining;
+ struct strbuf buf;
};
static int grab_nth_branch_switch(unsigned char *osha1, unsigned char *nsha1,
struct grab_nth_branch_switch_cbdata *cb = cb_data;
const char *match = NULL, *target = NULL;
size_t len;
- int nth;
if (!prefixcmp(message, "checkout: moving from ")) {
match = message + strlen("checkout: moving from ");
if (!match || !target)
return 0;
-
- len = target - match;
- nth = cb->cnt++ % cb->alloc;
- strbuf_reset(&cb->buf[nth]);
- strbuf_add(&cb->buf[nth], match, len);
+ if (--(cb->remaining) == 0) {
+ len = target - match;
+ strbuf_reset(&cb->buf);
+ strbuf_add(&cb->buf, match, len);
+ return 1; /* we are done */
+ }
return 0;
}
static int interpret_nth_prior_checkout(const char *name, struct strbuf *buf)
{
long nth;
- int i, retval;
+ int retval;
struct grab_nth_branch_switch_cbdata cb;
const char *brace;
char *num_end;
brace = strchr(name, '}');
if (!brace)
return -1;
- nth = strtol(name+3, &num_end, 10);
+ nth = strtol(name + 3, &num_end, 10);
if (num_end != brace)
return -1;
if (nth <= 0)
return -1;
- cb.alloc = nth;
- cb.buf = xmalloc(nth * sizeof(struct strbuf));
- for (i = 0; i < nth; i++)
- strbuf_init(&cb.buf[i], 20);
- cb.cnt = 0;
+ cb.remaining = nth;
+ strbuf_init(&cb.buf, 20);
+
retval = 0;
- for_each_recent_reflog_ent("HEAD", grab_nth_branch_switch, 40960, &cb);
- if (cb.cnt < nth) {
- cb.cnt = 0;
- for_each_reflog_ent("HEAD", grab_nth_branch_switch, &cb);
+ if (0 < for_each_reflog_ent_reverse("HEAD", grab_nth_branch_switch, &cb)) {
+ strbuf_reset(buf);
+ strbuf_add(buf, cb.buf.buf, cb.buf.len);
+ retval = brace - name + 1;
}
- if (cb.cnt < nth)
- goto release_return;
- i = cb.cnt % nth;
- strbuf_reset(buf);
- strbuf_add(buf, cb.buf[i].buf, cb.buf[i].len);
- retval = brace-name+1;
-
-release_return:
- for (i = 0; i < nth; i++)
- strbuf_release(&cb.buf[i]);
- free(cb.buf);
+ strbuf_release(&cb.buf);
return retval;
}