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Merge branch 'db/remote'

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* db/remote:
  Move refspec pattern matching to match_refs().
  Update local tracking refs when pushing
  Add handlers for fetch-side configuration of remotes.
  Move refspec parser from connect.c and cache.h to remote.{c,h}
  Move remote parsing into a library file out of builtin-push.
This commit is contained in:
Junio C Hamano 2007-05-29 01:24:20 -07:00
commit 322bcd9a9a
9 changed files with 710 additions and 538 deletions
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5
Makefile
View File

@ -296,7 +296,8 @@ LIB_H = \
diff.h object.h pack.h pkt-line.h quote.h refs.h list-objects.h sideband.h \
run-command.h strbuf.h tag.h tree.h git-compat-util.h revision.h \
tree-walk.h log-tree.h dir.h path-list.h unpack-trees.h builtin.h \
utf8.h reflog-walk.h patch-ids.h attr.h decorate.h progress.h mailmap.h
utf8.h reflog-walk.h patch-ids.h attr.h decorate.h progress.h \
mailmap.h remote.h
DIFF_OBJS = \
diff.o diff-lib.o diffcore-break.o diffcore-order.o \
@ -318,7 +319,7 @@ LIB_OBJS = \
write_or_die.o trace.o list-objects.o grep.o match-trees.o \
alloc.o merge-file.o path-list.o help.o unpack-trees.o $(DIFF_OBJS) \
color.o wt-status.o archive-zip.o archive-tar.o shallow.o utf8.o \
convert.o attr.o decorate.o progress.o mailmap.o symlinks.o
convert.o attr.o decorate.o progress.o mailmap.o symlinks.o remote.o
BUILTIN_OBJS = \
builtin-add.o \

322
builtin-push.c
View File

@ -5,17 +5,13 @@
#include "refs.h"
#include "run-command.h"
#include "builtin.h"
#define MAX_URI (16)
#include "remote.h"
static const char push_usage[] = "git-push [--all] [--tags] [--receive-pack=<git-receive-pack>] [--repo=all] [-f | --force] [-v] [<repository> <refspec>...]";
static int all, tags, force, thin = 1, verbose;
static int all, force, thin = 1, verbose;
static const char *receivepack;
#define BUF_SIZE (2084)
static char buffer[BUF_SIZE];
static const char **refspec;
static int refspec_nr;
@ -27,285 +23,47 @@ static void add_refspec(const char *ref)
refspec_nr = nr;
}
static int expand_one_ref(const char *ref, const unsigned char *sha1, int flag, void *cb_data)
{
/* Ignore the "refs/" at the beginning of the refname */
ref += 5;
if (!prefixcmp(ref, "tags/"))
add_refspec(xstrdup(ref));
return 0;
}
static void expand_refspecs(void)
{
if (all) {
if (refspec_nr)
die("cannot mix '--all' and a refspec");
/*
* No need to expand "--all" - we'll just use
* the "--all" flag to send-pack
*/
return;
}
if (!tags)
return;
for_each_ref(expand_one_ref, NULL);
}
struct wildcard_cb {
const char *from_prefix;
int from_prefix_len;
const char *to_prefix;
int to_prefix_len;
int force;
};
static int expand_wildcard_ref(const char *ref, const unsigned char *sha1, int flag, void *cb_data)
{
struct wildcard_cb *cb = cb_data;
int len = strlen(ref);
char *expanded, *newref;
if (len < cb->from_prefix_len ||
memcmp(cb->from_prefix, ref, cb->from_prefix_len))
return 0;
expanded = xmalloc(len * 2 + cb->force +
(cb->to_prefix_len - cb->from_prefix_len) + 2);
newref = expanded + cb->force;
if (cb->force)
expanded[0] = '+';
memcpy(newref, ref, len);
newref[len] = ':';
memcpy(newref + len + 1, cb->to_prefix, cb->to_prefix_len);
strcpy(newref + len + 1 + cb->to_prefix_len,
ref + cb->from_prefix_len);
add_refspec(expanded);
return 0;
}
static int wildcard_ref(const char *ref)
{
int len;
const char *colon;
struct wildcard_cb cb;
memset(&cb, 0, sizeof(cb));
if (ref[0] == '+') {
cb.force = 1;
ref++;
}
len = strlen(ref);
colon = strchr(ref, ':');
if (! (colon && ref < colon &&
colon[-2] == '/' && colon[-1] == '*' &&
/* "<mine>/<asterisk>:<yours>/<asterisk>" is at least 7 bytes */
7 <= len &&
ref[len-2] == '/' && ref[len-1] == '*') )
return 0 ;
cb.from_prefix = ref;
cb.from_prefix_len = colon - ref - 1;
cb.to_prefix = colon + 1;
cb.to_prefix_len = len - (colon - ref) - 2;
for_each_ref(expand_wildcard_ref, &cb);
return 1;
}
static void set_refspecs(const char **refs, int nr)
{
if (nr) {
int i;
for (i = 0; i < nr; i++) {
const char *ref = refs[i];
if (!strcmp("tag", ref)) {
char *tag;
int len;
if (nr <= ++i)
die("tag shorthand without <tag>");
len = strlen(refs[i]) + 11;
tag = xmalloc(len);
strcpy(tag, "refs/tags/");
strcat(tag, refs[i]);
ref = tag;
}
else if (wildcard_ref(ref))
continue;
add_refspec(ref);
int i;
for (i = 0; i < nr; i++) {
const char *ref = refs[i];
if (!strcmp("tag", ref)) {
char *tag;
int len;
if (nr <= ++i)
die("tag shorthand without <tag>");
len = strlen(refs[i]) + 11;
tag = xmalloc(len);
strcpy(tag, "refs/tags/");
strcat(tag, refs[i]);
ref = tag;
}
add_refspec(ref);
}
expand_refspecs();
}
static int get_remotes_uri(const char *repo, const char *uri[MAX_URI])
{
int n = 0;
FILE *f = fopen(git_path("remotes/%s", repo), "r");
int has_explicit_refspec = refspec_nr || all || tags;
if (!f)
return -1;
while (fgets(buffer, BUF_SIZE, f)) {
int is_refspec;
char *s, *p;
if (!prefixcmp(buffer, "URL:")) {
is_refspec = 0;
s = buffer + 4;
} else if (!prefixcmp(buffer, "Push:")) {
is_refspec = 1;
s = buffer + 5;
} else
continue;
/* Remove whitespace at the head.. */
while (isspace(*s))
s++;
if (!*s)
continue;
/* ..and at the end */
p = s + strlen(s);
while (isspace(p[-1]))
*--p = 0;
if (!is_refspec) {
if (n < MAX_URI)
uri[n++] = xstrdup(s);
else
error("more than %d URL's specified, ignoring the rest", MAX_URI);
}
else if (is_refspec && !has_explicit_refspec) {
if (!wildcard_ref(s))
add_refspec(xstrdup(s));
}
}
fclose(f);
if (!n)
die("remote '%s' has no URL", repo);
return n;
}
static const char **config_uri;
static const char *config_repo;
static int config_repo_len;
static int config_current_uri;
static int config_get_refspecs;
static int config_get_receivepack;
static int get_remote_config(const char* key, const char* value)
{
if (!prefixcmp(key, "remote.") &&
!strncmp(key + 7, config_repo, config_repo_len)) {
if (!strcmp(key + 7 + config_repo_len, ".url")) {
if (config_current_uri < MAX_URI)
config_uri[config_current_uri++] = xstrdup(value);
else
error("more than %d URL's specified, ignoring the rest", MAX_URI);
}
else if (config_get_refspecs &&
!strcmp(key + 7 + config_repo_len, ".push")) {
if (!wildcard_ref(value))
add_refspec(xstrdup(value));
}
else if (config_get_receivepack &&
!strcmp(key + 7 + config_repo_len, ".receivepack")) {
if (!receivepack) {
char *rp = xmalloc(strlen(value) + 16);
sprintf(rp, "--receive-pack=%s", value);
receivepack = rp;
} else
error("more than one receivepack given, using the first");
}
}
return 0;
}
static int get_config_remotes_uri(const char *repo, const char *uri[MAX_URI])
{
config_repo_len = strlen(repo);
config_repo = repo;
config_current_uri = 0;
config_uri = uri;
config_get_refspecs = !(refspec_nr || all || tags);
config_get_receivepack = (receivepack == NULL);
git_config(get_remote_config);
return config_current_uri;
}
static int get_branches_uri(const char *repo, const char *uri[MAX_URI])
{
const char *slash = strchr(repo, '/');
int n = slash ? slash - repo : 1000;
FILE *f = fopen(git_path("branches/%.*s", n, repo), "r");
char *s, *p;
int len;
if (!f)
return 0;
s = fgets(buffer, BUF_SIZE, f);
fclose(f);
if (!s)
return 0;
while (isspace(*s))
s++;
if (!*s)
return 0;
p = s + strlen(s);
while (isspace(p[-1]))
*--p = 0;
len = p - s;
if (slash)
len += strlen(slash);
p = xmalloc(len + 1);
strcpy(p, s);
if (slash)
strcat(p, slash);
uri[0] = p;
return 1;
}
/*
* Read remotes and branches file, fill the push target URI
* list. If there is no command line refspecs, read Push: lines
* to set up the *refspec list as well.
* return the number of push target URIs
*/
static int read_config(const char *repo, const char *uri[MAX_URI])
{
int n;
if (*repo != '/') {
n = get_remotes_uri(repo, uri);
if (n > 0)
return n;
n = get_config_remotes_uri(repo, uri);
if (n > 0)
return n;
n = get_branches_uri(repo, uri);
if (n > 0)
return n;
}
uri[0] = repo;
return 1;
}
static int do_push(const char *repo)
{
const char *uri[MAX_URI];
int i, n, errs;
int i, errs;
int common_argc;
const char **argv;
int argc;
struct remote *remote = remote_get(repo);
n = read_config(repo, uri);
if (n <= 0)
if (!remote)
die("bad repository '%s'", repo);
if (remote->receivepack) {
char *rp = xmalloc(strlen(remote->receivepack) + 16);
sprintf(rp, "--receive-pack=%s", remote->receivepack);
receivepack = rp;
}
if (!refspec && !all && remote->push_refspec_nr) {
refspec = remote->push_refspec;
refspec_nr = remote->push_refspec_nr;
}
argv = xmalloc((refspec_nr + 10) * sizeof(char *));
argv[0] = "dummy-send-pack";
argc = 1;
@ -318,18 +76,23 @@ static int do_push(const char *repo)
common_argc = argc;
errs = 0;
for (i = 0; i < n; i++) {
for (i = 0; i < remote->uri_nr; i++) {
int err;
int dest_argc = common_argc;
int dest_refspec_nr = refspec_nr;
const char **dest_refspec = refspec;
const char *dest = uri[i];
const char *dest = remote->uri[i];
const char *sender = "send-pack";
if (!prefixcmp(dest, "http://") ||
!prefixcmp(dest, "https://"))
sender = "http-push";
else if (thin)
argv[dest_argc++] = "--thin";
else {
char *rem = xmalloc(strlen(remote->name) + 10);
sprintf(rem, "--remote=%s", remote->name);
argv[dest_argc++] = rem;
if (thin)
argv[dest_argc++] = "--thin";
}
argv[0] = sender;
argv[dest_argc++] = dest;
while (dest_refspec_nr--)
@ -341,7 +104,7 @@ static int do_push(const char *repo)
if (!err)
continue;
error("failed to push to '%s'", uri[i]);
error("failed to push to '%s'", remote->uri[i]);
switch (err) {
case -ERR_RUN_COMMAND_FORK:
error("unable to fork for %s", sender);
@ -362,7 +125,7 @@ static int do_push(const char *repo)
int cmd_push(int argc, const char **argv, const char *prefix)
{
int i;
const char *repo = "origin"; /* default repository */
const char *repo = NULL; /* default repository */
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
@ -385,7 +148,7 @@ int cmd_push(int argc, const char **argv, const char *prefix)
continue;
}
if (!strcmp(arg, "--tags")) {
tags = 1;
add_refspec("refs/tags/*");
continue;
}
if (!strcmp(arg, "--force") || !strcmp(arg, "-f")) {
@ -411,5 +174,8 @@ int cmd_push(int argc, const char **argv, const char *prefix)
usage(push_usage);
}
set_refspecs(argv + i, argc - i);
if (all && refspec)
usage(push_usage);
return do_push(repo);
}

2
cache.h
View File

@ -467,8 +467,6 @@ struct ref {
extern pid_t git_connect(int fd[2], char *url, const char *prog, int flags);
extern int finish_connect(pid_t pid);
extern int path_match(const char *path, int nr, char **match);
extern int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
int nr_refspec, char **refspec, int all);
extern int get_ack(int fd, unsigned char *result_sha1);
extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
extern int server_supports(const char *feature);

240
connect.c
View File

@ -4,6 +4,7 @@
#include "quote.h"
#include "refs.h"
#include "run-command.h"
#include "remote.h"
static char *server_capabilities;
@ -128,245 +129,6 @@ int path_match(const char *path, int nr, char **match)
return 0;
}
struct refspec {
char *src;
char *dst;
char force;
};
/*
* A:B means fast forward remote B with local A.
* +A:B means overwrite remote B with local A.
* +A is a shorthand for +A:A.
* A is a shorthand for A:A.
* :B means delete remote B.
*/
static struct refspec *parse_ref_spec(int nr_refspec, char **refspec)
{
int i;
struct refspec *rs = xcalloc(sizeof(*rs), (nr_refspec + 1));
for (i = 0; i < nr_refspec; i++) {
char *sp, *dp, *ep;
sp = refspec[i];
if (*sp == '+') {
rs[i].force = 1;
sp++;
}
ep = strchr(sp, ':');
if (ep) {
dp = ep + 1;
*ep = 0;
}
else
dp = sp;
rs[i].src = sp;
rs[i].dst = dp;
}
rs[nr_refspec].src = rs[nr_refspec].dst = NULL;
return rs;
}
static int count_refspec_match(const char *pattern,
struct ref *refs,
struct ref **matched_ref)
{
int patlen = strlen(pattern);
struct ref *matched_weak = NULL;
struct ref *matched = NULL;
int weak_match = 0;
int match = 0;
for (weak_match = match = 0; refs; refs = refs->next) {
char *name = refs->name;
int namelen = strlen(name);
int weak_match;
if (namelen < patlen ||
memcmp(name + namelen - patlen, pattern, patlen))
continue;
if (namelen != patlen && name[namelen - patlen - 1] != '/')
continue;
/* A match is "weak" if it is with refs outside
* heads or tags, and did not specify the pattern
* in full (e.g. "refs/remotes/origin/master") or at
* least from the toplevel (e.g. "remotes/origin/master");
* otherwise "git push $URL master" would result in
* ambiguity between remotes/origin/master and heads/master
* at the remote site.
*/
if (namelen != patlen &&
patlen != namelen - 5 &&
prefixcmp(name, "refs/heads/") &&
prefixcmp(name, "refs/tags/")) {
/* We want to catch the case where only weak
* matches are found and there are multiple
* matches, and where more than one strong
* matches are found, as ambiguous. One
* strong match with zero or more weak matches
* are acceptable as a unique match.
*/
matched_weak = refs;
weak_match++;
}
else {
matched = refs;
match++;
}
}
if (!matched) {
*matched_ref = matched_weak;
return weak_match;
}
else {
*matched_ref = matched;
return match;
}
}
static void link_dst_tail(struct ref *ref, struct ref ***tail)
{
**tail = ref;
*tail = &ref->next;
**tail = NULL;
}
static struct ref *try_explicit_object_name(const char *name)
{
unsigned char sha1[20];
struct ref *ref;
int len;
if (!*name) {
ref = xcalloc(1, sizeof(*ref) + 20);
strcpy(ref->name, "(delete)");
hashclr(ref->new_sha1);
return ref;
}
if (get_sha1(name, sha1))
return NULL;
len = strlen(name) + 1;
ref = xcalloc(1, sizeof(*ref) + len);
memcpy(ref->name, name, len);
hashcpy(ref->new_sha1, sha1);
return ref;
}
static int match_explicit_refs(struct ref *src, struct ref *dst,
struct ref ***dst_tail, struct refspec *rs)
{
int i, errs;
for (i = errs = 0; rs[i].src; i++) {
struct ref *matched_src, *matched_dst;
matched_src = matched_dst = NULL;
switch (count_refspec_match(rs[i].src, src, &matched_src)) {
case 1:
break;
case 0:
/* The source could be in the get_sha1() format
* not a reference name. :refs/other is a
* way to delete 'other' ref at the remote end.
*/
matched_src = try_explicit_object_name(rs[i].src);
if (matched_src)
break;
errs = 1;
error("src refspec %s does not match any.",
rs[i].src);
break;
default:
errs = 1;
error("src refspec %s matches more than one.",
rs[i].src);
break;
}
switch (count_refspec_match(rs[i].dst, dst, &matched_dst)) {
case 1:
break;
case 0:
if (!memcmp(rs[i].dst, "refs/", 5)) {
int len = strlen(rs[i].dst) + 1;
matched_dst = xcalloc(1, sizeof(*dst) + len);
memcpy(matched_dst->name, rs[i].dst, len);
link_dst_tail(matched_dst, dst_tail);
}
else if (!strcmp(rs[i].src, rs[i].dst) &&
matched_src) {
/* pushing "master:master" when
* remote does not have master yet.
*/
int len = strlen(matched_src->name) + 1;
matched_dst = xcalloc(1, sizeof(*dst) + len);
memcpy(matched_dst->name, matched_src->name,
len);
link_dst_tail(matched_dst, dst_tail);
}
else {
errs = 1;
error("dst refspec %s does not match any "
"existing ref on the remote and does "
"not start with refs/.", rs[i].dst);
}
break;
default:
errs = 1;
error("dst refspec %s matches more than one.",
rs[i].dst);
break;
}
if (errs)
continue;
if (matched_dst->peer_ref) {
errs = 1;
error("dst ref %s receives from more than one src.",
matched_dst->name);
}
else {
matched_dst->peer_ref = matched_src;
matched_dst->force = rs[i].force;
}
}
return -errs;
}
static struct ref *find_ref_by_name(struct ref *list, const char *name)
{
for ( ; list; list = list->next)
if (!strcmp(list->name, name))
return list;
return NULL;
}
int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
int nr_refspec, char **refspec, int all)
{
struct refspec *rs = parse_ref_spec(nr_refspec, refspec);
if (nr_refspec)
return match_explicit_refs(src, dst, dst_tail, rs);
/* pick the remainder */
for ( ; src; src = src->next) {
struct ref *dst_peer;
if (src->peer_ref)
continue;
dst_peer = find_ref_by_name(dst, src->name);
if ((dst_peer && dst_peer->peer_ref) || (!dst_peer && !all))
continue;
if (!dst_peer) {
/* Create a new one and link it */
int len = strlen(src->name) + 1;
dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
memcpy(dst_peer->name, src->name, len);
hashcpy(dst_peer->new_sha1, src->new_sha1);
link_dst_tail(dst_peer, dst_tail);
}
dst_peer->peer_ref = src;
}
return 0;
}
enum protocol {
PROTO_LOCAL = 1,
PROTO_SSH,

1
http-push.c
View File

@ -9,6 +9,7 @@
#include "diff.h"
#include "revision.h"
#include "exec_cmd.h"
#include "remote.h"
#include <expat.h>

27
refs.c
View File

@ -603,15 +603,20 @@ int get_ref_sha1(const char *ref, unsigned char *sha1)
static inline int bad_ref_char(int ch)
{
return (((unsigned) ch) <= ' ' ||
ch == '~' || ch == '^' || ch == ':' ||
/* 2.13 Pattern Matching Notation */
ch == '?' || ch == '*' || ch == '[');
if (((unsigned) ch) <= ' ' ||
ch == '~' || ch == '^' || ch == ':')
return 1;
/* 2.13 Pattern Matching Notation */
if (ch == '?' || ch == '[') /* Unsupported */
return 1;
if (ch == '*') /* Supported at the end */
return 2;
return 0;
}
int check_ref_format(const char *ref)
{
int ch, level;
int ch, level, bad_type;
const char *cp = ref;
level = 0;
@ -622,13 +627,19 @@ int check_ref_format(const char *ref)
return -1; /* should not end with slashes */
/* we are at the beginning of the path component */
if (ch == '.' || bad_ref_char(ch))
if (ch == '.')
return -1;
bad_type = bad_ref_char(ch);
if (bad_type) {
return (bad_type == 2 && !*cp) ? -3 : -1;
}
/* scan the rest of the path component */
while ((ch = *cp++) != 0) {
if (bad_ref_char(ch))
return -1;
bad_type = bad_ref_char(ch);
if (bad_type) {
return (bad_type == 2 && !*cp) ? -3 : -1;
}
if (ch == '/')
break;
if (ch == '.' && *cp == '.')

553
remote.c Normal file
View File

@ -0,0 +1,553 @@
#include "cache.h"
#include "remote.h"
#include "refs.h"
static struct remote **remotes;
static int allocated_remotes;
#define BUF_SIZE (2048)
static char buffer[BUF_SIZE];
static void add_push_refspec(struct remote *remote, const char *ref)
{
int nr = remote->push_refspec_nr + 1;
remote->push_refspec =
xrealloc(remote->push_refspec, nr * sizeof(char *));
remote->push_refspec[nr-1] = ref;
remote->push_refspec_nr = nr;
}
static void add_fetch_refspec(struct remote *remote, const char *ref)
{
int nr = remote->fetch_refspec_nr + 1;
remote->fetch_refspec =
xrealloc(remote->fetch_refspec, nr * sizeof(char *));
remote->fetch_refspec[nr-1] = ref;
remote->fetch_refspec_nr = nr;
}
static void add_uri(struct remote *remote, const char *uri)
{
int nr = remote->uri_nr + 1;
remote->uri =
xrealloc(remote->uri, nr * sizeof(char *));
remote->uri[nr-1] = uri;
remote->uri_nr = nr;
}
static struct remote *make_remote(const char *name, int len)
{
int i, empty = -1;
for (i = 0; i < allocated_remotes; i++) {
if (!remotes[i]) {
if (empty < 0)
empty = i;
} else {
if (len ? (!strncmp(name, remotes[i]->name, len) &&
!remotes[i]->name[len]) :
!strcmp(name, remotes[i]->name))
return remotes[i];
}
}
if (empty < 0) {
empty = allocated_remotes;
allocated_remotes += allocated_remotes ? allocated_remotes : 1;
remotes = xrealloc(remotes,
sizeof(*remotes) * allocated_remotes);
memset(remotes + empty, 0,
(allocated_remotes - empty) * sizeof(*remotes));
}
remotes[empty] = xcalloc(1, sizeof(struct remote));
if (len)
remotes[empty]->name = xstrndup(name, len);
else
remotes[empty]->name = xstrdup(name);
return remotes[empty];
}
static void read_remotes_file(struct remote *remote)
{
FILE *f = fopen(git_path("remotes/%s", remote->name), "r");
if (!f)
return;
while (fgets(buffer, BUF_SIZE, f)) {
int value_list;
char *s, *p;
if (!prefixcmp(buffer, "URL:")) {
value_list = 0;
s = buffer + 4;
} else if (!prefixcmp(buffer, "Push:")) {
value_list = 1;
s = buffer + 5;
} else if (!prefixcmp(buffer, "Pull:")) {
value_list = 2;
s = buffer + 5;
} else
continue;
while (isspace(*s))
s++;
if (!*s)
continue;
p = s + strlen(s);
while (isspace(p[-1]))
*--p = 0;
switch (value_list) {
case 0:
add_uri(remote, xstrdup(s));
break;
case 1:
add_push_refspec(remote, xstrdup(s));
break;
case 2:
add_fetch_refspec(remote, xstrdup(s));
break;
}
}
fclose(f);
}
static void read_branches_file(struct remote *remote)
{
const char *slash = strchr(remote->name, '/');
int n = slash ? slash - remote->name : 1000;
FILE *f = fopen(git_path("branches/%.*s", n, remote->name), "r");
char *s, *p;
int len;
if (!f)
return;
s = fgets(buffer, BUF_SIZE, f);
fclose(f);
if (!s)
return;
while (isspace(*s))
s++;
if (!*s)
return;
p = s + strlen(s);
while (isspace(p[-1]))
*--p = 0;
len = p - s;
if (slash)
len += strlen(slash);
p = xmalloc(len + 1);
strcpy(p, s);
if (slash)
strcat(p, slash);
add_uri(remote, p);
}
static char *default_remote_name = NULL;
static const char *current_branch = NULL;
static int current_branch_len = 0;
static int handle_config(const char *key, const char *value)
{
const char *name;
const char *subkey;
struct remote *remote;
if (!prefixcmp(key, "branch.") && current_branch &&
!strncmp(key + 7, current_branch, current_branch_len) &&
!strcmp(key + 7 + current_branch_len, ".remote")) {
free(default_remote_name);
default_remote_name = xstrdup(value);
}
if (prefixcmp(key, "remote."))
return 0;
name = key + 7;
subkey = strrchr(name, '.');
if (!subkey)
return error("Config with no key for remote %s", name);
if (*subkey == '/') {
warning("Config remote shorthand cannot begin with '/': %s", name);
return 0;
}
remote = make_remote(name, subkey - name);
if (!value) {
/* if we ever have a boolean variable, e.g. "remote.*.disabled"
* [remote "frotz"]
* disabled
* is a valid way to set it to true; we get NULL in value so
* we need to handle it here.
*
* if (!strcmp(subkey, ".disabled")) {
* val = git_config_bool(key, value);
* return 0;
* } else
*
*/
return 0; /* ignore unknown booleans */
}
if (!strcmp(subkey, ".url")) {
add_uri(remote, xstrdup(value));
} else if (!strcmp(subkey, ".push")) {
add_push_refspec(remote, xstrdup(value));
} else if (!strcmp(subkey, ".fetch")) {
add_fetch_refspec(remote, xstrdup(value));
} else if (!strcmp(subkey, ".receivepack")) {
if (!remote->receivepack)
remote->receivepack = xstrdup(value);
else
error("more than one receivepack given, using the first");
}
return 0;
}
static void read_config(void)
{
unsigned char sha1[20];
const char *head_ref;
int flag;
if (default_remote_name) // did this already
return;
default_remote_name = xstrdup("origin");
current_branch = NULL;
head_ref = resolve_ref("HEAD", sha1, 0, &flag);
if (head_ref && (flag & REF_ISSYMREF) &&
!prefixcmp(head_ref, "refs/heads/")) {
current_branch = head_ref + strlen("refs/heads/");
current_branch_len = strlen(current_branch);
}
git_config(handle_config);
}
static struct refspec *parse_ref_spec(int nr_refspec, const char **refspec)
{
int i;
struct refspec *rs = xcalloc(sizeof(*rs), nr_refspec);
for (i = 0; i < nr_refspec; i++) {
const char *sp, *ep, *gp;
sp = refspec[i];
if (*sp == '+') {
rs[i].force = 1;
sp++;
}
gp = strchr(sp, '*');
ep = strchr(sp, ':');
if (gp && ep && gp > ep)
gp = NULL;
if (ep) {
if (ep[1]) {
const char *glob = strchr(ep + 1, '*');
if (!glob)
gp = NULL;
if (gp)
rs[i].dst = xstrndup(ep + 1,
glob - ep - 1);
else
rs[i].dst = xstrdup(ep + 1);
}
} else {
ep = sp + strlen(sp);
}
if (gp) {
rs[i].pattern = 1;
ep = gp;
}
rs[i].src = xstrndup(sp, ep - sp);
}
return rs;
}
struct remote *remote_get(const char *name)
{
struct remote *ret;
read_config();
if (!name)
name = default_remote_name;
ret = make_remote(name, 0);
if (name[0] != '/') {
if (!ret->uri)
read_remotes_file(ret);
if (!ret->uri)
read_branches_file(ret);
}
if (!ret->uri)
add_uri(ret, name);
if (!ret->uri)
return NULL;
ret->fetch = parse_ref_spec(ret->fetch_refspec_nr, ret->fetch_refspec);
ret->push = parse_ref_spec(ret->push_refspec_nr, ret->push_refspec);
return ret;
}
int remote_has_uri(struct remote *remote, const char *uri)
{
int i;
for (i = 0; i < remote->uri_nr; i++) {
if (!strcmp(remote->uri[i], uri))
return 1;
}
return 0;
}
int remote_find_tracking(struct remote *remote, struct refspec *refspec)
{
int i;
for (i = 0; i < remote->fetch_refspec_nr; i++) {
struct refspec *fetch = &remote->fetch[i];
if (!fetch->dst)
continue;
if (fetch->pattern) {
if (!prefixcmp(refspec->src, fetch->src)) {
refspec->dst =
xmalloc(strlen(fetch->dst) +
strlen(refspec->src) -
strlen(fetch->src) + 1);
strcpy(refspec->dst, fetch->dst);
strcpy(refspec->dst + strlen(fetch->dst),
refspec->src + strlen(fetch->src));
refspec->force = fetch->force;
return 0;
}
} else {
if (!strcmp(refspec->src, fetch->src)) {
refspec->dst = xstrdup(fetch->dst);
refspec->force = fetch->force;
return 0;
}
}
}
refspec->dst = NULL;
return -1;
}
static int count_refspec_match(const char *pattern,
struct ref *refs,
struct ref **matched_ref)
{
int patlen = strlen(pattern);
struct ref *matched_weak = NULL;
struct ref *matched = NULL;
int weak_match = 0;
int match = 0;
for (weak_match = match = 0; refs; refs = refs->next) {
char *name = refs->name;
int namelen = strlen(name);
int weak_match;
if (namelen < patlen ||
memcmp(name + namelen - patlen, pattern, patlen))
continue;
if (namelen != patlen && name[namelen - patlen - 1] != '/')
continue;
/* A match is "weak" if it is with refs outside
* heads or tags, and did not specify the pattern
* in full (e.g. "refs/remotes/origin/master") or at
* least from the toplevel (e.g. "remotes/origin/master");
* otherwise "git push $URL master" would result in
* ambiguity between remotes/origin/master and heads/master
* at the remote site.
*/
if (namelen != patlen &&
patlen != namelen - 5 &&
prefixcmp(name, "refs/heads/") &&
prefixcmp(name, "refs/tags/")) {
/* We want to catch the case where only weak
* matches are found and there are multiple
* matches, and where more than one strong
* matches are found, as ambiguous. One
* strong match with zero or more weak matches
* are acceptable as a unique match.
*/
matched_weak = refs;
weak_match++;
}
else {
matched = refs;
match++;
}
}
if (!matched) {
*matched_ref = matched_weak;
return weak_match;
}
else {
*matched_ref = matched;
return match;
}
}
static void link_dst_tail(struct ref *ref, struct ref ***tail)
{
**tail = ref;
*tail = &ref->next;
**tail = NULL;
}
static struct ref *try_explicit_object_name(const char *name)
{
unsigned char sha1[20];
struct ref *ref;
int len;
if (!*name) {
ref = xcalloc(1, sizeof(*ref) + 20);
strcpy(ref->name, "(delete)");
hashclr(ref->new_sha1);
return ref;
}
if (get_sha1(name, sha1))
return NULL;
len = strlen(name) + 1;
ref = xcalloc(1, sizeof(*ref) + len);
memcpy(ref->name, name, len);
hashcpy(ref->new_sha1, sha1);
return ref;
}
static int match_explicit_refs(struct ref *src, struct ref *dst,
struct ref ***dst_tail, struct refspec *rs,
int rs_nr)
{
int i, errs;
for (i = errs = 0; i < rs_nr; i++) {
struct ref *matched_src, *matched_dst;
const char *dst_value = rs[i].dst;
if (rs[i].pattern)
continue;
if (dst_value == NULL)
dst_value = rs[i].src;
matched_src = matched_dst = NULL;
switch (count_refspec_match(rs[i].src, src, &matched_src)) {
case 1:
break;
case 0:
/* The source could be in the get_sha1() format
* not a reference name. :refs/other is a
* way to delete 'other' ref at the remote end.
*/
matched_src = try_explicit_object_name(rs[i].src);
if (matched_src)
break;
errs = 1;
error("src refspec %s does not match any.",
rs[i].src);
break;
default:
errs = 1;
error("src refspec %s matches more than one.",
rs[i].src);
break;
}
switch (count_refspec_match(dst_value, dst, &matched_dst)) {
case 1:
break;
case 0:
if (!memcmp(dst_value, "refs/", 5)) {
int len = strlen(dst_value) + 1;
matched_dst = xcalloc(1, sizeof(*dst) + len);
memcpy(matched_dst->name, dst_value, len);
link_dst_tail(matched_dst, dst_tail);
}
else if (!strcmp(rs[i].src, dst_value) &&
matched_src) {
/* pushing "master:master" when
* remote does not have master yet.
*/
int len = strlen(matched_src->name) + 1;
matched_dst = xcalloc(1, sizeof(*dst) + len);
memcpy(matched_dst->name, matched_src->name,
len);
link_dst_tail(matched_dst, dst_tail);
}
else {
errs = 1;
error("dst refspec %s does not match any "
"existing ref on the remote and does "
"not start with refs/.", dst_value);
}
break;
default:
errs = 1;
error("dst refspec %s matches more than one.",
dst_value);
break;
}
if (errs)
continue;
if (matched_dst->peer_ref) {
errs = 1;
error("dst ref %s receives from more than one src.",
matched_dst->name);
}
else {
matched_dst->peer_ref = matched_src;
matched_dst->force = rs[i].force;
}
}
return -errs;
}
static struct ref *find_ref_by_name(struct ref *list, const char *name)
{
for ( ; list; list = list->next)
if (!strcmp(list->name, name))
return list;
return NULL;
}
static int check_pattern_match(struct refspec *rs, int rs_nr, struct ref *src)
{
int i;
if (!rs_nr)
return 1;
for (i = 0; i < rs_nr; i++) {
if (rs[i].pattern && !prefixcmp(src->name, rs[i].src))
return 1;
}
return 0;
}
int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
int nr_refspec, char **refspec, int all)
{
struct refspec *rs =
parse_ref_spec(nr_refspec, (const char **) refspec);
if (match_explicit_refs(src, dst, dst_tail, rs, nr_refspec))
return -1;
/* pick the remainder */
for ( ; src; src = src->next) {
struct ref *dst_peer;
if (src->peer_ref)
continue;
if (!check_pattern_match(rs, nr_refspec, src))
continue;
dst_peer = find_ref_by_name(dst, src->name);
if (dst_peer && dst_peer->peer_ref)
/* We're already sending something to this ref. */
continue;
if (!dst_peer && !nr_refspec && !all)
/* Remote doesn't have it, and we have no
* explicit pattern, and we don't have
* --all. */
continue;
if (!dst_peer) {
/* Create a new one and link it */
int len = strlen(src->name) + 1;
dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
memcpy(dst_peer->name, src->name, len);
hashcpy(dst_peer->new_sha1, src->new_sha1);
link_dst_tail(dst_peer, dst_tail);
}
dst_peer->peer_ref = src;
}
return 0;
}

41
remote.h Normal file
View File

@ -0,0 +1,41 @@
#ifndef REMOTE_H
#define REMOTE_H
struct remote {
const char *name;
const char **uri;
int uri_nr;
const char **push_refspec;
struct refspec *push;
int push_refspec_nr;
const char **fetch_refspec;
struct refspec *fetch;
int fetch_refspec_nr;
const char *receivepack;
};
struct remote *remote_get(const char *name);
int remote_has_uri(struct remote *remote, const char *uri);
struct refspec {
unsigned force : 1;
unsigned pattern : 1;
const char *src;
char *dst;
};
int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
int nr_refspec, char **refspec, int all);
/*
* For the given remote, reads the refspec's src and sets the other fields.
*/
int remote_find_tracking(struct remote *remote, struct refspec *refspec);
#endif

57
send-pack.c
View File

@ -4,6 +4,7 @@
#include "refs.h"
#include "pkt-line.h"
#include "run-command.h"
#include "remote.h"
static const char send_pack_usage[] =
"git-send-pack [--all] [--force] [--receive-pack=<git-receive-pack>] [--verbose] [--thin] [<host>:]<directory> [<ref>...]\n"
@ -176,7 +177,7 @@ static int receive_status(int in)
return ret;
}
static int send_pack(int in, int out, int nr_refspec, char **refspec)
static int send_pack(int in, int out, struct remote *remote, int nr_refspec, char **refspec)
{
struct ref *ref;
int new_refs;
@ -213,18 +214,19 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
new_refs = 0;
for (ref = remote_refs; ref; ref = ref->next) {
char old_hex[60], *new_hex;
int delete_ref;
int will_delete_ref;
if (!ref->peer_ref)
continue;
delete_ref = is_null_sha1(ref->peer_ref->new_sha1);
if (delete_ref && !allow_deleting_refs) {
will_delete_ref = is_null_sha1(ref->peer_ref->new_sha1);
if (will_delete_ref && !allow_deleting_refs) {
error("remote does not support deleting refs");
ret = -2;
continue;
}
if (!delete_ref &&
if (!will_delete_ref &&
!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
if (verbose)
fprintf(stderr, "'%s': up-to-date\n", ref->name);
@ -251,7 +253,7 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
*/
if (!force_update &&
!delete_ref &&
!will_delete_ref &&
!is_null_sha1(ref->old_sha1) &&
!ref->force) {
if (!has_sha1_file(ref->old_sha1) ||
@ -275,7 +277,7 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
}
}
hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
if (!delete_ref)
if (!will_delete_ref)
new_refs++;
strcpy(old_hex, sha1_to_hex(ref->old_sha1));
new_hex = sha1_to_hex(ref->new_sha1);
@ -290,7 +292,7 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
else
packet_write(out, "%s %s %s",
old_hex, new_hex, ref->name);
if (delete_ref)
if (will_delete_ref)
fprintf(stderr, "deleting '%s'\n", ref->name);
else {
fprintf(stderr, "updating '%s'", ref->name);
@ -300,6 +302,28 @@ static int send_pack(int in, int out, int nr_refspec, char **refspec)
fprintf(stderr, "\n from %s\n to %s\n",
old_hex, new_hex);
}
if (remote) {
struct refspec rs;
rs.src = ref->name;
remote_find_tracking(remote, &rs);
if (rs.dst) {
struct ref_lock *lock;
fprintf(stderr, " Also local %s\n", rs.dst);
if (will_delete_ref) {
if (delete_ref(rs.dst, NULL)) {
error("Failed to delete");
}
} else {
lock = lock_any_ref_for_update(rs.dst, NULL, 0);
if (!lock)
error("Failed to lock");
else
write_ref_sha1(lock, ref->new_sha1,
"update by push");
}
free(rs.dst);
}
}
}
packet_flush(out);
@ -330,6 +354,7 @@ static void verify_remote_names(int nr_heads, char **heads)
case -2: /* ok but a single level -- that is fine for
* a match pattern.
*/
case -3: /* ok but ends with a pattern-match character */
continue;
}
die("remote part of refspec is not a valid name in %s",
@ -344,6 +369,8 @@ int main(int argc, char **argv)
char **heads = NULL;
int fd[2], ret;
pid_t pid;
char *remote_name = NULL;
struct remote *remote = NULL;
setup_git_directory();
git_config(git_default_config);
@ -361,6 +388,10 @@ int main(int argc, char **argv)
receivepack = arg + 7;
continue;
}
if (!prefixcmp(arg, "--remote=")) {
remote_name = arg + 9;
continue;
}
if (!strcmp(arg, "--all")) {
send_all = 1;
continue;
@ -393,10 +424,18 @@ int main(int argc, char **argv)
usage(send_pack_usage);
verify_remote_names(nr_heads, heads);
if (remote_name) {
remote = remote_get(remote_name);
if (!remote_has_uri(remote, dest)) {
die("Destination %s is not a uri for %s",
dest, remote_name);
}
}
pid = git_connect(fd, dest, receivepack, verbose ? CONNECT_VERBOSE : 0);
if (pid < 0)
return 1;
ret = send_pack(fd[0], fd[1], nr_heads, heads);
ret = send_pack(fd[0], fd[1], remote, nr_heads, heads);
close(fd[0]);
close(fd[1]);
ret |= finish_connect(pid);