summaryrefslogtreecommitdiff
path: root/sha1_name.c
diff options
context:
space:
mode:
Diffstat (limited to 'sha1_name.c')
-rw-r--r--sha1_name.c351
1 files changed, 225 insertions, 126 deletions
diff --git a/sha1_name.c b/sha1_name.c
index c50630a3ea..6fca8692d2 100644
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -52,7 +52,7 @@ static void update_candidates(struct disambiguate_state *ds, const unsigned char
}
if (!ds->candidate_ok) {
- /* discard the candidate; we know it does not satisify fn */
+ /* discard the candidate; we know it does not satisfy fn */
hashcpy(ds->candidate, current);
ds->candidate_checked = 0;
return;
@@ -241,7 +241,7 @@ static int disambiguate_committish_only(const unsigned char *sha1, void *cb_data
return 0;
/* We need to do this the hard way... */
- obj = deref_tag(lookup_object(sha1), NULL, 0);
+ obj = deref_tag(parse_object(sha1), NULL, 0);
if (obj && obj->type == OBJ_COMMIT)
return 1;
return 0;
@@ -343,7 +343,6 @@ static int get_short_sha1(const char *name, int len, unsigned char *sha1,
return status;
}
-
int for_each_abbrev(const char *prefix, each_abbrev_fn fn, void *cb_data)
{
char hex_pfx[40];
@@ -431,22 +430,51 @@ static inline int upstream_mark(const char *string, int len)
}
static int get_sha1_1(const char *name, int len, unsigned char *sha1, unsigned lookup_flags);
+static int interpret_nth_prior_checkout(const char *name, int namelen, struct strbuf *buf);
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.objectNameWarning 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))
+ int at, reflog_len, nth_prior = 0;
+
+ if (len == 40 && !get_sha1_hex(str, sha1)) {
+ if (warn_ambiguous_refs && warn_on_object_refname_ambiguity) {
+ refs_found = dwim_ref(str, len, tmp_sha1, &real_ref);
+ if (refs_found > 0) {
+ 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 (len && str[len-1] == '}') {
- for (at = len-2; at >= 0; at--) {
+ for (at = len-4; at >= 0; at--) {
if (str[at] == '@' && str[at+1] == '{') {
+ if (str[at+2] == '-') {
+ if (at != 0)
+ /* @{-N} not at start */
+ return -1;
+ nth_prior = 1;
+ continue;
+ }
if (!upstream_mark(str + at, len - at)) {
reflog_len = (len-1) - (at+2);
len = at;
@@ -460,20 +488,22 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
if (len && ambiguous_path(str, len))
return -1;
- if (!len && reflog_len) {
+ if (nth_prior) {
struct strbuf buf = STRBUF_INIT;
- int ret;
- /* try the @{-N} syntax for n-th checkout */
- ret = interpret_branch_name(str+at, &buf);
- if (ret > 0) {
- /* substitute this branch name and restart */
- return get_sha1_1(buf.buf, buf.len, sha1, 0);
- } else if (ret == 0) {
- return -1;
+ int detached;
+
+ if (interpret_nth_prior_checkout(str, len, &buf) > 0) {
+ detached = (buf.len == 40 && !get_sha1_hex(buf.buf, sha1));
+ strbuf_release(&buf);
+ if (detached)
+ return 0;
}
+ }
+
+ if (!len && reflog_len)
/* allow "@{...}" to mean the current branch reflog */
refs_found = dwim_ref("HEAD", 4, sha1, &real_ref);
- } else if (reflog_len)
+ else if (reflog_len)
refs_found = dwim_log(str, len, sha1, &real_ref);
else
refs_found = dwim_ref(str, len, sha1, &real_ref);
@@ -481,7 +511,9 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
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) {
@@ -490,10 +522,6 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
unsigned long co_time;
int co_tz, co_cnt;
- /* a @{-N} placed anywhere except the start is an error */
- if (str[at+2] == '-')
- return -1;
-
/* Is it asking for N-th entry, or approxidate? */
for (i = nth = 0; 0 <= nth && i < reflog_len; i++) {
char ch = str[at+2+i];
@@ -517,12 +545,21 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
}
if (read_ref_at(real_ref, at_time, nth, sha1, NULL,
&co_time, &co_tz, &co_cnt)) {
+ if (!len) {
+ if (starts_with(real_ref, "refs/heads/")) {
+ str = real_ref + 11;
+ len = strlen(real_ref + 11);
+ } else {
+ /* detached HEAD */
+ str = "HEAD";
+ len = 4;
+ }
+ }
if (at_time)
warning("Log for '%.*s' only goes "
"back to %s.", len, str,
show_date(co_time, co_tz, DATE_RFC2822));
else {
- free(real_ref);
die("Log for '%.*s' only has %d entries.",
len, str, co_cnt);
}
@@ -544,8 +581,6 @@ static int get_parent(const char *name, int len,
if (ret)
return ret;
commit = lookup_commit_reference(sha1);
- if (!commit)
- return -1;
if (parse_commit(commit))
return -1;
if (!idx) {
@@ -594,7 +629,7 @@ struct object *peel_to_type(const char *name, int namelen,
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;
@@ -639,12 +674,16 @@ static int peel_onion(const char *name, int len, unsigned char *sha1)
return -1;
sp++; /* beginning of type name, or closing brace for empty */
- if (!strncmp(commit_type, sp, 6) && sp[6] == '}')
+ if (starts_with(sp, "commit}"))
expected_type = OBJ_COMMIT;
- else if (!strncmp(tree_type, sp, 4) && sp[4] == '}')
+ else if (starts_with(sp, "tag}"))
+ expected_type = OBJ_TAG;
+ else if (starts_with(sp, "tree}"))
expected_type = OBJ_TREE;
- else if (!strncmp(blob_type, sp, 4) && sp[4] == '}')
+ else if (starts_with(sp, "blob}"))
expected_type = OBJ_BLOB;
+ else if (starts_with(sp, "object}"))
+ expected_type = OBJ_ANY;
else if (sp[0] == '}')
expected_type = OBJ_NONE;
else if (sp[0] == '/')
@@ -654,6 +693,8 @@ static int peel_onion(const char *name, int len, unsigned char *sha1)
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;
@@ -856,8 +897,8 @@ static int get_sha1_oneline(const char *prefix, unsigned char *sha1,
}
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,
@@ -867,20 +908,20 @@ 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 ")) {
+ if (starts_with(message, "checkout: moving from ")) {
match = message + strlen("checkout: moving from ");
target = strstr(match, " to ");
}
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;
}
@@ -888,47 +929,38 @@ static int grab_nth_branch_switch(unsigned char *osha1, unsigned char *nsha1,
* Parse @{-N} syntax, return the number of characters parsed
* if successful; otherwise signal an error with negative value.
*/
-static int interpret_nth_prior_checkout(const char *name, struct strbuf *buf)
+static int interpret_nth_prior_checkout(const char *name, int namelen,
+ struct strbuf *buf)
{
long nth;
- int i, retval;
+ int retval;
struct grab_nth_branch_switch_cbdata cb;
const char *brace;
char *num_end;
+ if (namelen < 4)
+ return -1;
if (name[0] != '@' || name[1] != '{' || name[2] != '-')
return -1;
- brace = strchr(name, '}');
+ brace = memchr(name, '}', namelen);
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;
}
@@ -974,6 +1006,100 @@ int get_sha1_mb(const char *name, unsigned char *sha1)
return st;
}
+/* parse @something syntax, when 'something' is not {.*} */
+static int interpret_empty_at(const char *name, int namelen, int len, struct strbuf *buf)
+{
+ const char *next;
+
+ if (len || name[1] == '{')
+ return -1;
+
+ /* make sure it's a single @, or @@{.*}, not @foo */
+ next = memchr(name + len + 1, '@', namelen - len - 1);
+ if (next && next[1] != '{')
+ return -1;
+ if (!next)
+ next = name + namelen;
+ if (next != name + 1)
+ return -1;
+
+ strbuf_reset(buf);
+ strbuf_add(buf, "HEAD", 4);
+ return 1;
+}
+
+static int reinterpret(const char *name, int namelen, int len, struct strbuf *buf)
+{
+ /* we have extra data, which might need further processing */
+ struct strbuf tmp = STRBUF_INIT;
+ int used = buf->len;
+ int ret;
+
+ strbuf_add(buf, name + len, namelen - len);
+ ret = interpret_branch_name(buf->buf, buf->len, &tmp);
+ /* that data was not interpreted, remove our cruft */
+ if (ret < 0) {
+ strbuf_setlen(buf, used);
+ return len;
+ }
+ strbuf_reset(buf);
+ strbuf_addbuf(buf, &tmp);
+ strbuf_release(&tmp);
+ /* tweak for size of {-N} versus expanded ref name */
+ return ret - used + len;
+}
+
+static void set_shortened_ref(struct strbuf *buf, const char *ref)
+{
+ char *s = shorten_unambiguous_ref(ref, 0);
+ strbuf_reset(buf);
+ strbuf_addstr(buf, s);
+ free(s);
+}
+
+static const char *get_upstream_branch(const char *branch_buf, int len)
+{
+ char *branch = xstrndup(branch_buf, len);
+ struct branch *upstream = branch_get(*branch ? branch : NULL);
+
+ /*
+ * Upstream can be NULL only if branch refers to HEAD and HEAD
+ * points to something different than a branch.
+ */
+ if (!upstream)
+ die(_("HEAD does not point to a branch"));
+ if (!upstream->merge || !upstream->merge[0]->dst) {
+ if (!ref_exists(upstream->refname))
+ die(_("No such branch: '%s'"), branch);
+ if (!upstream->merge) {
+ die(_("No upstream configured for branch '%s'"),
+ upstream->name);
+ }
+ die(
+ _("Upstream branch '%s' not stored as a remote-tracking branch"),
+ upstream->merge[0]->src);
+ }
+ free(branch);
+
+ return upstream->merge[0]->dst;
+}
+
+static int interpret_upstream_mark(const char *name, int namelen,
+ int at, struct strbuf *buf)
+{
+ int len;
+
+ len = upstream_mark(name + at, namelen - at);
+ if (!len)
+ return -1;
+
+ if (memchr(name, ':', at))
+ return -1;
+
+ set_shortened_ref(buf, get_upstream_branch(name, at));
+ return len + at;
+}
+
/*
* This reads short-hand syntax that not only evaluates to a commit
* object name, but also can act as if the end user spelled the name
@@ -995,77 +1121,50 @@ int get_sha1_mb(const char *name, unsigned char *sha1)
* If the input was ok but there are not N branch switches in the
* reflog, it returns 0.
*/
-int interpret_branch_name(const char *name, struct strbuf *buf)
+int interpret_branch_name(const char *name, int namelen, struct strbuf *buf)
{
- char *cp;
- struct branch *upstream;
- int namelen = strlen(name);
- int len = interpret_nth_prior_checkout(name, buf);
- int tmp_len;
+ char *at;
+ const char *start;
+ int len = interpret_nth_prior_checkout(name, namelen, buf);
- if (!len)
+ if (!namelen)
+ namelen = strlen(name);
+
+ if (!len) {
return len; /* syntax Ok, not enough switches */
- if (0 < len && len == namelen)
- return len; /* consumed all */
- else if (0 < len) {
- /* we have extra data, which might need further processing */
- struct strbuf tmp = STRBUF_INIT;
- int used = buf->len;
- int ret;
+ } else if (len > 0) {
+ if (len == namelen)
+ return len; /* consumed all */
+ else
+ return reinterpret(name, namelen, len, buf);
+ }
+
+ for (start = name;
+ (at = memchr(start, '@', namelen - (start - name)));
+ start = at + 1) {
- strbuf_add(buf, name + len, namelen - len);
- ret = interpret_branch_name(buf->buf, &tmp);
- /* that data was not interpreted, remove our cruft */
- if (ret < 0) {
- strbuf_setlen(buf, used);
+ len = interpret_empty_at(name, namelen, at - name, buf);
+ if (len > 0)
+ return reinterpret(name, namelen, len, buf);
+
+ len = interpret_upstream_mark(name, namelen, at - name, buf);
+ if (len > 0)
return len;
- }
- strbuf_reset(buf);
- strbuf_addbuf(buf, &tmp);
- strbuf_release(&tmp);
- /* tweak for size of {-N} versus expanded ref name */
- return ret - used + len;
}
- cp = strchr(name, '@');
- if (!cp)
- return -1;
- tmp_len = upstream_mark(cp, namelen - (cp - name));
- if (!tmp_len)
- return -1;
- len = cp + tmp_len - name;
- cp = xstrndup(name, cp - name);
- upstream = branch_get(*cp ? cp : NULL);
- /*
- * Upstream can be NULL only if cp refers to HEAD and HEAD
- * points to something different than a branch.
- */
- if (!upstream)
- return error(_("HEAD does not point to a branch"));
- if (!upstream->merge || !upstream->merge[0]->dst) {
- if (!ref_exists(upstream->refname))
- return error(_("No such branch: '%s'"), cp);
- if (!upstream->merge)
- return error(_("No upstream configured for branch '%s'"),
- upstream->name);
- return error(
- _("Upstream branch '%s' not stored as a remote-tracking branch"),
- upstream->merge[0]->src);
- }
- free(cp);
- cp = shorten_unambiguous_ref(upstream->merge[0]->dst, 0);
- strbuf_reset(buf);
- strbuf_addstr(buf, cp);
- free(cp);
- return len;
+ return -1;
}
int strbuf_branchname(struct strbuf *sb, const char *name)
{
int len = strlen(name);
- if (interpret_branch_name(name, sb) == len)
+ int used = interpret_branch_name(name, len, sb);
+
+ if (used == len)
return 0;
- strbuf_add(sb, name, len);
+ if (used < 0)
+ used = 0;
+ strbuf_add(sb, name + used, len - used);
return len;
}
@@ -1089,13 +1188,13 @@ int get_sha1(const char *name, unsigned char *sha1)
}
/*
- * Many callers know that the user meant to name a committish by
+ * Many callers know that the user meant to name a commit-ish by
* syntactical positions where the object name appears. Calling this
* function allows the machinery to disambiguate shorter-than-unique
- * abbreviated object names between committish and others.
+ * abbreviated object names between commit-ish and others.
*
* Note that this does NOT error out when the named object is not a
- * committish. It is merely to give a hint to the disambiguation
+ * commit-ish. It is merely to give a hint to the disambiguation
* machinery.
*/
int get_sha1_committish(const char *name, unsigned char *sha1)
@@ -1178,7 +1277,7 @@ static void diagnose_invalid_index_path(int stage,
const char *filename)
{
struct stat st;
- struct cache_entry *ce;
+ const struct cache_entry *ce;
int pos;
unsigned namelen = strlen(filename);
unsigned fullnamelen;
@@ -1232,7 +1331,7 @@ static void diagnose_invalid_index_path(int stage,
static char *resolve_relative_path(const char *rel)
{
- if (prefixcmp(rel, "./") && prefixcmp(rel, "../"))
+ if (!starts_with(rel, "./") && !starts_with(rel, "../"))
return NULL;
if (!startup_info)
@@ -1272,7 +1371,7 @@ static int get_sha1_with_context_1(const char *name,
*/
if (name[0] == ':') {
int stage = 0;
- struct cache_entry *ce;
+ const struct cache_entry *ce;
char *new_path = NULL;
int pos;
if (!only_to_die && namelen > 2 && name[1] == '/') {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 15:18:56 +0000