unsigned candidate_ok:1;
unsigned disambiguate_fn_used:1;
unsigned ambiguous:1;
+ unsigned always_call_fn:1;
};
static void update_candidates(struct disambiguate_state *ds, const unsigned char *current)
{
+ if (ds->always_call_fn) {
+ ds->ambiguous = ds->fn(current, ds->cb_data) ? 1 : 0;
+ return;
+ }
if (!ds->candidate_exists) {
/* this is the first candidate */
hashcpy(ds->candidate, current);
return kind == OBJ_COMMIT;
}
-static int get_short_sha1(const char *name, int len, unsigned char *sha1,
- unsigned flags)
+static int disambiguate_committish_only(const unsigned char *sha1, void *cb_data_unused)
{
- int i, status;
- char hex_pfx[40];
- unsigned char bin_pfx[20];
- struct disambiguate_state ds;
- int quietly = !!(flags & GET_SHA1_QUIETLY);
+ struct object *obj;
+ int kind;
+
+ kind = sha1_object_info(sha1, NULL);
+ if (kind == OBJ_COMMIT)
+ return 1;
+ if (kind != OBJ_TAG)
+ return 0;
+
+ /* We need to do this the hard way... */
+ obj = deref_tag(lookup_object(sha1), NULL, 0);
+ if (obj && obj->type == OBJ_COMMIT)
+ return 1;
+ return 0;
+}
+
+static int disambiguate_tree_only(const unsigned char *sha1, void *cb_data_unused)
+{
+ int kind = sha1_object_info(sha1, NULL);
+ return kind == OBJ_TREE;
+}
+
+static int disambiguate_treeish_only(const unsigned char *sha1, void *cb_data_unused)
+{
+ struct object *obj;
+ int kind;
+
+ kind = sha1_object_info(sha1, NULL);
+ if (kind == OBJ_TREE || kind == OBJ_COMMIT)
+ return 1;
+ if (kind != OBJ_TAG)
+ return 0;
+
+ /* We need to do this the hard way... */
+ obj = deref_tag(lookup_object(sha1), NULL, 0);
+ if (obj && (obj->type == OBJ_TREE || obj->type == OBJ_COMMIT))
+ return 1;
+ return 0;
+}
+
+static int disambiguate_blob_only(const unsigned char *sha1, void *cb_data_unused)
+{
+ int kind = sha1_object_info(sha1, NULL);
+ return kind == OBJ_BLOB;
+}
+
+static int prepare_prefixes(const char *name, int len,
+ unsigned char *bin_pfx,
+ char *hex_pfx)
+{
+ int i;
- if (len < MINIMUM_ABBREV || len > 40)
- return -1;
hashclr(bin_pfx);
memset(hex_pfx, 'x', 40);
for (i = 0; i < len ;i++) {
val <<= 4;
bin_pfx[i >> 1] |= val;
}
+ return 0;
+}
+
+static int get_short_sha1(const char *name, int len, unsigned char *sha1,
+ unsigned flags)
+{
+ int status;
+ char hex_pfx[40];
+ unsigned char bin_pfx[20];
+ struct disambiguate_state ds;
+ int quietly = !!(flags & GET_SHA1_QUIETLY);
+
+ if (len < MINIMUM_ABBREV || len > 40)
+ return -1;
+ if (prepare_prefixes(name, len, bin_pfx, hex_pfx) < 0)
+ return -1;
prepare_alt_odb();
memset(&ds, 0, sizeof(ds));
if (flags & GET_SHA1_COMMIT)
ds.fn = disambiguate_commit_only;
+ else if (flags & GET_SHA1_COMMITTISH)
+ ds.fn = disambiguate_committish_only;
+ else if (flags & GET_SHA1_TREE)
+ ds.fn = disambiguate_tree_only;
+ else if (flags & GET_SHA1_TREEISH)
+ ds.fn = disambiguate_treeish_only;
+ else if (flags & GET_SHA1_BLOB)
+ ds.fn = disambiguate_blob_only;
find_short_object_filename(len, hex_pfx, &ds);
find_short_packed_object(len, bin_pfx, &ds);
return status;
}
+
+int for_each_abbrev(const char *prefix, each_abbrev_fn fn, void *cb_data)
+{
+ char hex_pfx[40];
+ unsigned char bin_pfx[20];
+ struct disambiguate_state ds;
+ int len = strlen(prefix);
+
+ if (len < MINIMUM_ABBREV || len > 40)
+ return -1;
+ if (prepare_prefixes(prefix, len, bin_pfx, hex_pfx) < 0)
+ return -1;
+
+ prepare_alt_odb();
+
+ memset(&ds, 0, sizeof(ds));
+ ds.always_call_fn = 1;
+ ds.cb_data = cb_data;
+ ds.fn = fn;
+
+ find_short_object_filename(len, hex_pfx, &ds);
+ find_short_packed_object(len, bin_pfx, &ds);
+ return ds.ambiguous;
+}
+
const char *find_unique_abbrev(const unsigned char *sha1, int len)
{
int status, exists;
return 0;
}
-static int get_sha1_1(const char *name, int len, unsigned char *sha1);
+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, 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.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))
+ int at, reflog_len, nth_prior = 0;
+
+ if (len == 40 && !get_sha1_hex(str, sha1)) {
+ 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 (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;
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);
- } else if (ret == 0) {
- return -1;
+ int detached;
+
+ if (interpret_nth_prior_checkout(str, &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);
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) {
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];
}
if (read_ref_at(real_ref, at_time, nth, sha1, NULL,
&co_time, &co_tz, &co_cnt)) {
+ if (!len) {
+ if (!prefixcmp(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);
}
unsigned char *result, int idx)
{
unsigned char sha1[20];
- int ret = get_sha1_1(name, len, sha1);
+ int ret = get_sha1_1(name, len, sha1, GET_SHA1_COMMITTISH);
struct commit *commit;
struct commit_list *p;
struct commit *commit;
int ret;
- ret = get_sha1_1(name, len, sha1);
+ ret = get_sha1_1(name, len, sha1, GET_SHA1_COMMITTISH);
if (ret)
return ret;
commit = lookup_commit_reference(sha1);
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;
unsigned char outer[20];
const char *sp;
unsigned int expected_type = 0;
+ unsigned lookup_flags = 0;
struct object *o;
/*
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] == '/')
else
return -1;
- if (get_sha1_1(name, sp - name - 2, outer))
+ 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;
o = parse_object(outer);
return -1;
}
-static int get_sha1_1(const char *name, int len, unsigned char *sha1)
+static int get_sha1_1(const char *name, int len, unsigned char *sha1, unsigned lookup_flags)
{
int ret, has_suffix;
const char *cp;
if (!ret)
return 0;
- return get_short_sha1(name, len, sha1, 0);
+ return get_short_sha1(name, len, sha1, lookup_flags);
}
/*
}
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;
}
struct strbuf sb;
strbuf_init(&sb, dots - name);
strbuf_add(&sb, name, dots - name);
- st = get_sha1(sb.buf, sha1_tmp);
+ st = get_sha1_committish(sb.buf, sha1_tmp);
strbuf_release(&sb);
}
if (st)
if (!one)
return -1;
- if (get_sha1(dots[3] ? (dots + 3) : "HEAD", sha1_tmp))
+ if (get_sha1_committish(dots[3] ? (dots + 3) : "HEAD", sha1_tmp))
return -1;
two = lookup_commit_reference_gently(sha1_tmp, 0);
if (!two)
return st;
}
+/* parse @something syntax, when 'something' is not {.*} */
+static int interpret_empty_at(const char *name, int namelen, int len, struct strbuf *buf)
+{
+ if (len || 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, &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;
+}
+
/*
* 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
int len = interpret_nth_prior_checkout(name, buf);
int tmp_len;
- if (!len)
+ 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;
-
- 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);
- 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;
+ } else if (len > 0) {
+ if (len == namelen)
+ return len; /* consumed all */
+ else
+ return reinterpret(name, namelen, len, buf);
}
cp = strchr(name, '@');
if (!cp)
return -1;
+
+ len = interpret_empty_at(name, namelen, cp - name, buf);
+ if (len > 0)
+ return reinterpret(name, namelen, len, buf);
+
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);
- if (!upstream
- || !upstream->merge
- || !upstream->merge[0]->dst)
- return error("No upstream branch found for '%s'", cp);
+ /*
+ * Upstream can be NULL only if cp 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'"), cp);
+ 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(cp);
cp = shorten_unambiguous_ref(upstream->merge[0]->dst, 0);
strbuf_reset(buf);
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, 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;
}
int get_sha1(const char *name, unsigned char *sha1)
{
struct object_context unused;
- return get_sha1_with_context(name, sha1, &unused);
+ return get_sha1_with_context(name, 0, sha1, &unused);
+}
+
+/*
+ * Many callers know that the user meant to name a committish 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.
+ *
+ * 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
+ * machinery.
+ */
+int get_sha1_committish(const char *name, unsigned char *sha1)
+{
+ struct object_context unused;
+ return get_sha1_with_context(name, GET_SHA1_COMMITTISH,
+ sha1, &unused);
+}
+
+int get_sha1_treeish(const char *name, unsigned char *sha1)
+{
+ struct object_context unused;
+ return get_sha1_with_context(name, GET_SHA1_TREEISH,
+ sha1, &unused);
+}
+
+int get_sha1_commit(const char *name, unsigned char *sha1)
+{
+ struct object_context unused;
+ return get_sha1_with_context(name, GET_SHA1_COMMIT,
+ sha1, &unused);
+}
+
+int get_sha1_tree(const char *name, unsigned char *sha1)
+{
+ struct object_context unused;
+ return get_sha1_with_context(name, GET_SHA1_TREE,
+ sha1, &unused);
+}
+
+int get_sha1_blob(const char *name, unsigned char *sha1)
+{
+ struct object_context unused;
+ return get_sha1_with_context(name, GET_SHA1_BLOB,
+ sha1, &unused);
}
/* Must be called only when object_name:filename doesn't exist. */
static void diagnose_invalid_sha1_path(const char *prefix,
const char *filename,
const unsigned char *tree_sha1,
- const char *object_name)
+ const char *object_name,
+ int object_name_len)
{
struct stat st;
unsigned char sha1[20];
prefix = "";
if (!lstat(filename, &st))
- die("Path '%s' exists on disk, but not in '%s'.",
- filename, object_name);
+ die("Path '%s' exists on disk, but not in '%.*s'.",
+ filename, object_name_len, object_name);
if (errno == ENOENT || errno == ENOTDIR) {
char *fullname = xmalloc(strlen(filename)
+ strlen(prefix) + 1);
if (!get_tree_entry(tree_sha1, fullname,
sha1, &mode)) {
die("Path '%s' exists, but not '%s'.\n"
- "Did you mean '%s:%s' aka '%s:./%s'?",
+ "Did you mean '%.*s:%s' aka '%.*s:./%s'?",
fullname,
filename,
- object_name,
+ object_name_len, object_name,
fullname,
- object_name,
+ object_name_len, object_name,
filename);
}
- die("Path '%s' does not exist in '%s'",
- filename, object_name);
+ die("Path '%s' does not exist in '%.*s'",
+ filename, object_name_len, object_name);
}
}
rel);
}
-static int get_sha1_with_context_1(const char *name, unsigned char *sha1,
- struct object_context *oc,
- int only_to_die, const char *prefix)
+static int get_sha1_with_context_1(const char *name,
+ unsigned flags,
+ const char *prefix,
+ unsigned char *sha1,
+ struct object_context *oc)
{
int ret, bracket_depth;
int namelen = strlen(name);
const char *cp;
+ int only_to_die = flags & GET_SHA1_ONLY_TO_DIE;
memset(oc, 0, sizeof(*oc));
oc->mode = S_IFINVALID;
- ret = get_sha1_1(name, namelen, sha1);
+ ret = get_sha1_1(name, namelen, sha1, flags);
if (!ret)
return ret;
- /* sha1:path --> object name of path in ent sha1
+ /*
+ * sha1:path --> object name of path in ent sha1
* :path -> object name of absolute path in index
* :./path -> object name of path relative to cwd in index
* :[0-3]:path -> object name of path in index at stage
}
if (*cp == ':') {
unsigned char tree_sha1[20];
- char *object_name = NULL;
- if (only_to_die) {
- object_name = xmalloc(cp-name+1);
- strncpy(object_name, name, cp-name);
- object_name[cp-name] = '\0';
- }
- if (!get_sha1_1(name, cp-name, tree_sha1)) {
+ int len = cp - name;
+ if (!get_sha1_1(name, len, tree_sha1, GET_SHA1_TREEISH)) {
const char *filename = cp+1;
char *new_filename = NULL;
if (new_filename)
filename = new_filename;
ret = get_tree_entry(tree_sha1, filename, sha1, &oc->mode);
- if (only_to_die) {
+ if (ret && only_to_die) {
diagnose_invalid_sha1_path(prefix, filename,
- tree_sha1, object_name);
- free(object_name);
+ tree_sha1,
+ name, len);
}
hashcpy(oc->tree, tree_sha1);
strncpy(oc->path, filename,
return ret;
} else {
if (only_to_die)
- die("Invalid object name '%s'.", object_name);
+ die("Invalid object name '%.*s'.", len, name);
}
}
return ret;
{
struct object_context oc;
unsigned char sha1[20];
- get_sha1_with_context_1(name, sha1, &oc, 1, prefix);
+ get_sha1_with_context_1(name, GET_SHA1_ONLY_TO_DIE, prefix, sha1, &oc);
}
-int get_sha1_with_context(const char *str, unsigned char *sha1, struct object_context *orc)
+int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc)
{
- return get_sha1_with_context_1(str, sha1, orc, 0, NULL);
+ return get_sha1_with_context_1(str, flags, NULL, sha1, orc);
}