#include "transport.h"
#include "run-command.h"
#include "parse-options.h"
+#include "sigchain.h"
static const char * const builtin_fetch_usage[] = {
"git fetch [options] [<repository> <refspec>...]",
static void unlock_pack_on_signal(int signo)
{
unlock_pack();
- signal(SIGINT, SIG_DFL);
+ sigchain_pop(signo);
raise(signo);
}
return ref_map;
}
+#define STORE_REF_ERROR_OTHER 1
+#define STORE_REF_ERROR_DF_CONFLICT 2
+
static int s_update_ref(const char *action,
struct ref *ref,
int check_old)
lock = lock_any_ref_for_update(ref->name,
check_old ? ref->old_sha1 : NULL, 0);
if (!lock)
- return 2;
+ return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
+ STORE_REF_ERROR_OTHER;
if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
- return 2;
+ return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
+ STORE_REF_ERROR_OTHER;
return 0;
}
struct commit *current = NULL, *updated;
enum object_type type;
struct branch *current_branch = branch_get(NULL);
- const char *pretty_ref = ref->name + (
- !prefixcmp(ref->name, "refs/heads/") ? 11 :
- !prefixcmp(ref->name, "refs/tags/") ? 10 :
- !prefixcmp(ref->name, "refs/remotes/") ? 13 :
- 0);
+ const char *pretty_ref = prettify_refname(ref->name);
*display = 0;
type = sha1_object_info(ref->new_sha1, NULL);
}
}
-static int store_updated_refs(const char *url, const char *remote_name,
+static int store_updated_refs(const char *raw_url, const char *remote_name,
struct ref *ref_map)
{
FILE *fp;
char note[1024];
const char *what, *kind;
struct ref *rm;
- char *filename = git_path("FETCH_HEAD");
+ char *url, *filename = git_path("FETCH_HEAD");
fp = fopen(filename, "a");
if (!fp)
return error("cannot open %s: %s\n", filename, strerror(errno));
+
+ url = transport_anonymize_url(raw_url);
for (rm = ref_map; rm; rm = rm->next) {
struct ref *ref = NULL;
kind);
note_len += sprintf(note + note_len, "'%s' of ", what);
}
- note_len += sprintf(note + note_len, "%.*s", url_len, url);
- fprintf(fp, "%s\t%s\t%s\n",
+ note[note_len] = '\0';
+ fprintf(fp, "%s\t%s\t%s",
sha1_to_hex(commit ? commit->object.sha1 :
rm->old_sha1),
rm->merge ? "" : "not-for-merge",
note);
+ for (i = 0; i < url_len; ++i)
+ if ('\n' == url[i])
+ fputs("\\n", fp);
+ else
+ fputc(url[i], fp);
+ fputc('\n', fp);
if (ref)
rc |= update_local_ref(ref, what, note);
fprintf(stderr, " %s\n", note);
}
}
+ free(url);
fclose(fp);
- if (rc & 2)
+ if (rc & STORE_REF_ERROR_DF_CONFLICT)
error("some local refs could not be updated; try running\n"
" 'git remote prune %s' to remove any old, conflicting "
"branches", remote_name);
/*
* We would want to bypass the object transfer altogether if
- * everything we are going to fetch already exists and connected
+ * everything we are going to fetch already exists and is connected
* locally.
*
- * The refs we are going to fetch are in to_fetch (nr_heads in
- * total). If running
+ * The refs we are going to fetch are in ref_map. If running
*
- * $ git rev-list --objects to_fetch[0] to_fetch[1] ... --not --all
+ * $ git rev-list --objects --stdin --not --all
*
+ * (feeding all the refs in ref_map on its standard input)
* does not error out, that means everything reachable from the
* refs we are going to fetch exists and is connected to some of
* our existing refs.
{
struct child_process revlist;
struct ref *ref;
- char **argv;
- int i, err;
+ int err;
+ const char *argv[] = {"rev-list",
+ "--quiet", "--objects", "--stdin", "--not", "--all", NULL};
/*
* If we are deepening a shallow clone we already have these
if (depth)
return -1;
- for (i = 0, ref = ref_map; ref; ref = ref->next)
- i++;
- if (!i)
+ if (!ref_map)
return 0;
- argv = xmalloc(sizeof(*argv) * (i + 6));
- i = 0;
- argv[i++] = xstrdup("rev-list");
- argv[i++] = xstrdup("--quiet");
- argv[i++] = xstrdup("--objects");
- for (ref = ref_map; ref; ref = ref->next)
- argv[i++] = xstrdup(sha1_to_hex(ref->old_sha1));
- argv[i++] = xstrdup("--not");
- argv[i++] = xstrdup("--all");
- argv[i++] = NULL;
-
memset(&revlist, 0, sizeof(revlist));
- revlist.argv = (const char**)argv;
+ revlist.argv = argv;
revlist.git_cmd = 1;
- revlist.no_stdin = 1;
revlist.no_stdout = 1;
revlist.no_stderr = 1;
- err = run_command(&revlist);
+ revlist.in = -1;
+
+ err = start_command(&revlist);
+ if (err) {
+ error("could not run rev-list");
+ return err;
+ }
+
+ /*
+ * If rev-list --stdin encounters an unknown commit, it terminates,
+ * which will cause SIGPIPE in the write loop below.
+ */
+ sigchain_push(SIGPIPE, SIG_IGN);
+
+ for (ref = ref_map; ref; ref = ref->next) {
+ if (write_in_full(revlist.in, sha1_to_hex(ref->old_sha1), 40) < 0 ||
+ write_str_in_full(revlist.in, "\n") < 0) {
+ if (errno != EPIPE && errno != EINVAL)
+ error("failed write to rev-list: %s", strerror(errno));
+ err = -1;
+ break;
+ }
+ }
+
+ if (close(revlist.in)) {
+ error("failed to close rev-list's stdin: %s", strerror(errno));
+ err = -1;
+ }
- for (i = 0; argv[i]; i++)
- free(argv[i]);
- free(argv);
- return err;
+ sigchain_pop(SIGPIPE);
+
+ return finish_command(&revlist) || err;
}
static int fetch_refs(struct transport *transport, struct ref *ref_map)
return 0;
}
+struct tag_data {
+ struct ref **head;
+ struct ref ***tail;
+};
+
+static int add_to_tail(struct string_list_item *item, void *cb_data)
+{
+ struct tag_data *data = (struct tag_data *)cb_data;
+ struct ref *rm = NULL;
+
+ /* We have already decided to ignore this item */
+ if (!item->util)
+ return 0;
+
+ rm = alloc_ref(item->string);
+ rm->peer_ref = alloc_ref(item->string);
+ hashcpy(rm->old_sha1, item->util);
+
+ **data->tail = rm;
+ *data->tail = &rm->next;
+
+ return 0;
+}
+
static void find_non_local_tags(struct transport *transport,
struct ref **head,
struct ref ***tail)
{
struct string_list existing_refs = { NULL, 0, 0, 0 };
- struct string_list new_refs = { NULL, 0, 0, 1 };
- char *ref_name;
- int ref_name_len;
- const unsigned char *ref_sha1;
- const struct ref *tag_ref;
- struct ref *rm = NULL;
+ struct string_list remote_refs = { NULL, 0, 0, 0 };
+ struct tag_data data = {head, tail};
const struct ref *ref;
+ struct string_list_item *item = NULL;
for_each_ref(add_existing, &existing_refs);
for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
if (prefixcmp(ref->name, "refs/tags"))
continue;
- ref_name = xstrdup(ref->name);
- ref_name_len = strlen(ref_name);
- ref_sha1 = ref->old_sha1;
-
- if (!strcmp(ref_name + ref_name_len - 3, "^{}")) {
- ref_name[ref_name_len - 3] = 0;
- tag_ref = transport_get_remote_refs(transport);
- while (tag_ref) {
- if (!strcmp(tag_ref->name, ref_name)) {
- ref_sha1 = tag_ref->old_sha1;
- break;
- }
- tag_ref = tag_ref->next;
- }
+ /*
+ * The peeled ref always follows the matching base
+ * ref, so if we see a peeled ref that we don't want
+ * to fetch then we can mark the ref entry in the list
+ * as one to ignore by setting util to NULL.
+ */
+ if (!strcmp(ref->name + strlen(ref->name) - 3, "^{}")) {
+ if (item && !has_sha1_file(ref->old_sha1) &&
+ !will_fetch(head, ref->old_sha1) &&
+ !has_sha1_file(item->util) &&
+ !will_fetch(head, item->util))
+ item->util = NULL;
+ item = NULL;
+ continue;
}
- if (!string_list_has_string(&existing_refs, ref_name) &&
- !string_list_has_string(&new_refs, ref_name) &&
- (has_sha1_file(ref->old_sha1) ||
- will_fetch(head, ref->old_sha1))) {
- string_list_insert(ref_name, &new_refs);
+ /*
+ * If item is non-NULL here, then we previously saw a
+ * ref not followed by a peeled reference, so we need
+ * to check if it is a lightweight tag that we want to
+ * fetch.
+ */
+ if (item && !has_sha1_file(item->util) &&
+ !will_fetch(head, item->util))
+ item->util = NULL;
+
+ item = NULL;
- rm = alloc_ref(ref_name);
- rm->peer_ref = alloc_ref(ref_name);
- hashcpy(rm->old_sha1, ref_sha1);
+ /* skip duplicates and refs that we already have */
+ if (string_list_has_string(&remote_refs, ref->name) ||
+ string_list_has_string(&existing_refs, ref->name))
+ continue;
- **tail = rm;
- *tail = &rm->next;
- }
- free(ref_name);
+ item = string_list_insert(ref->name, &remote_refs);
+ item->util = (void *)ref->old_sha1;
}
string_list_clear(&existing_refs, 0);
- string_list_clear(&new_refs, 0);
+
+ /*
+ * We may have a final lightweight tag that needs to be
+ * checked to see if it needs fetching.
+ */
+ if (item && !has_sha1_file(item->util) &&
+ !will_fetch(head, item->util))
+ item->util = NULL;
+
+ /*
+ * For all the tags in the remote_refs string list, call
+ * add_to_tail to add them to the list of refs to be fetched
+ */
+ for_each_string_list(add_to_tail, &remote_refs, &data);
+
+ string_list_clear(&remote_refs, 0);
}
static void check_not_current_branch(struct ref *ref_map)
for (; ref_map; ref_map = ref_map->next)
if (ref_map->peer_ref && !strcmp(current_branch->refname,
ref_map->peer_ref->name))
- die("Refusing to fetch into current branch");
+ die("Refusing to fetch into current branch %s "
+ "of non-bare repository", current_branch->refname);
}
static int do_fetch(struct transport *transport,
{
int r = transport_set_option(transport, name, value);
if (r < 0)
- die("Option \"%s\" value \"%s\" is not valid for %s\n",
+ die("Option \"%s\" value \"%s\" is not valid for %s",
name, value, transport->url);
if (r > 0)
warning("Option \"%s\" is ignored for %s\n",
for (i = 1; i < argc; i++)
strbuf_addf(&default_rla, " %s", argv[i]);
- argc = parse_options(argc, argv,
+ argc = parse_options(argc, argv, prefix,
builtin_fetch_options, builtin_fetch_usage, 0);
if (argc == 0)
else
remote = remote_get(argv[0]);
+ if (!remote)
+ die("Where do you want to fetch from today?");
+
transport = transport_get(remote, remote->url[0]);
if (verbosity >= 2)
transport->verbose = 1;
if (depth)
set_option(TRANS_OPT_DEPTH, depth);
- if (!transport->url)
- die("Where do you want to fetch from today?");
-
if (argc > 1) {
int j = 0;
refs = xcalloc(argc + 1, sizeof(const char *));
ref_nr = j;
}
- signal(SIGINT, unlock_pack_on_signal);
+ sigchain_push_common(unlock_pack_on_signal);
atexit(unlock_pack);
exit_code = do_fetch(transport,
parse_fetch_refspec(ref_nr, refs), ref_nr);