#include "sigchain.h"
#include "transport.h"
#include "submodule.h"
+#include "connected.h"
static const char * const builtin_fetch_usage[] = {
"git fetch [<options>] [<repository> [<refspec>...]]",
}
}
+static int iterate_ref_map(void *cb_data, unsigned char sha1[20])
+{
+ struct ref **rm = cb_data;
+ struct ref *ref = *rm;
+
+ if (!ref)
+ return -1; /* end of the list */
+ *rm = ref->next;
+ hashcpy(sha1, ref->old_sha1);
+ return 0;
+}
+
static int store_updated_refs(const char *raw_url, const char *remote_name,
struct ref *ref_map)
{
const char *what, *kind;
struct ref *rm;
char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD");
+ int want_merge;
fp = fopen(filename, "a");
if (!fp)
url = transport_anonymize_url(raw_url);
else
url = xstrdup("foreign");
- for (rm = ref_map; rm; rm = rm->next) {
- struct ref *ref = NULL;
- if (rm->peer_ref) {
- ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
- strcpy(ref->name, rm->peer_ref->name);
- hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
- hashcpy(ref->new_sha1, rm->old_sha1);
- ref->force = rm->peer_ref->force;
- }
+ rm = ref_map;
+ if (check_everything_connected(iterate_ref_map, 0, &rm)) {
+ rc = error(_("%s did not send all necessary objects\n"), url);
+ goto abort;
+ }
- commit = lookup_commit_reference_gently(rm->old_sha1, 1);
- if (!commit)
- rm->merge = 0;
+ /*
+ * The first pass writes objects to be merged and then the
+ * second pass writes the rest, in order to allow using
+ * FETCH_HEAD as a refname to refer to the ref to be merged.
+ */
+ for (want_merge = 1; 0 <= want_merge; want_merge--) {
+ for (rm = ref_map; rm; rm = rm->next) {
+ struct ref *ref = NULL;
+
+ commit = lookup_commit_reference_gently(rm->old_sha1, 1);
+ if (!commit)
+ rm->merge = 0;
+
+ if (rm->merge != want_merge)
+ continue;
+
+ if (rm->peer_ref) {
+ ref = xcalloc(1, sizeof(*ref) + strlen(rm->peer_ref->name) + 1);
+ strcpy(ref->name, rm->peer_ref->name);
+ hashcpy(ref->old_sha1, rm->peer_ref->old_sha1);
+ hashcpy(ref->new_sha1, rm->old_sha1);
+ ref->force = rm->peer_ref->force;
+ }
- if (!strcmp(rm->name, "HEAD")) {
- kind = "";
- what = "";
- }
- else if (!prefixcmp(rm->name, "refs/heads/")) {
- kind = "branch";
- what = rm->name + 11;
- }
- else if (!prefixcmp(rm->name, "refs/tags/")) {
- kind = "tag";
- what = rm->name + 10;
- }
- else if (!prefixcmp(rm->name, "refs/remotes/")) {
- kind = "remote-tracking branch";
- what = rm->name + 13;
- }
- else {
- kind = "";
- what = rm->name;
- }
- url_len = strlen(url);
- for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
- ;
- url_len = i + 1;
- if (4 < i && !strncmp(".git", url + i - 3, 4))
- url_len = i - 3;
-
- strbuf_reset(¬e);
- if (*what) {
- if (*kind)
- strbuf_addf(¬e, "%s ", kind);
- strbuf_addf(¬e, "'%s' of ", what);
- }
- fprintf(fp, "%s\t%s\t%s",
- sha1_to_hex(commit ? commit->object.sha1 :
- rm->old_sha1),
- rm->merge ? "" : "not-for-merge",
- note.buf);
- for (i = 0; i < url_len; ++i)
- if ('\n' == url[i])
- fputs("\\n", fp);
- else
- fputc(url[i], fp);
- fputc('\n', fp);
-
- strbuf_reset(¬e);
- if (ref) {
- rc |= update_local_ref(ref, what, ¬e);
- free(ref);
- } else
- strbuf_addf(¬e, "* %-*s %-*s -> FETCH_HEAD",
- TRANSPORT_SUMMARY_WIDTH,
- *kind ? kind : "branch",
- REFCOL_WIDTH,
- *what ? what : "HEAD");
- if (note.len) {
- if (verbosity >= 0 && !shown_url) {
- fprintf(stderr, _("From %.*s\n"),
- url_len, url);
- shown_url = 1;
+ if (!strcmp(rm->name, "HEAD")) {
+ kind = "";
+ what = "";
+ }
+ else if (!prefixcmp(rm->name, "refs/heads/")) {
+ kind = "branch";
+ what = rm->name + 11;
+ }
+ else if (!prefixcmp(rm->name, "refs/tags/")) {
+ kind = "tag";
+ what = rm->name + 10;
+ }
+ else if (!prefixcmp(rm->name, "refs/remotes/")) {
+ kind = "remote-tracking branch";
+ what = rm->name + 13;
+ }
+ else {
+ kind = "";
+ what = rm->name;
+ }
+
+ url_len = strlen(url);
+ for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
+ ;
+ url_len = i + 1;
+ if (4 < i && !strncmp(".git", url + i - 3, 4))
+ url_len = i - 3;
+
+ strbuf_reset(¬e);
+ if (*what) {
+ if (*kind)
+ strbuf_addf(¬e, "%s ", kind);
+ strbuf_addf(¬e, "'%s' of ", what);
+ }
+ fprintf(fp, "%s\t%s\t%s",
+ sha1_to_hex(rm->old_sha1),
+ rm->merge ? "" : "not-for-merge",
+ note.buf);
+ for (i = 0; i < url_len; ++i)
+ if ('\n' == url[i])
+ fputs("\\n", fp);
+ else
+ fputc(url[i], fp);
+ fputc('\n', fp);
+
+ strbuf_reset(¬e);
+ if (ref) {
+ rc |= update_local_ref(ref, what, ¬e);
+ free(ref);
+ } else
+ strbuf_addf(¬e, "* %-*s %-*s -> FETCH_HEAD",
+ TRANSPORT_SUMMARY_WIDTH,
+ *kind ? kind : "branch",
+ REFCOL_WIDTH,
+ *what ? what : "HEAD");
+ if (note.len) {
+ if (verbosity >= 0 && !shown_url) {
+ fprintf(stderr, _("From %.*s\n"),
+ url_len, url);
+ shown_url = 1;
+ }
+ if (verbosity >= 0)
+ fprintf(stderr, " %s\n", note.buf);
}
- if (verbosity >= 0)
- fprintf(stderr, " %s\n", note.buf);
}
}
- free(url);
- fclose(fp);
+
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);
+
+ abort:
strbuf_release(¬e);
+ free(url);
+ fclose(fp);
return rc;
}
* We would want to bypass the object transfer altogether if
* everything we are going to fetch already exists and is connected
* locally.
- *
- * The refs we are going to fetch are in ref_map. If running
- *
- * $ 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.
*/
static int quickfetch(struct ref *ref_map)
{
- struct child_process revlist;
- struct ref *ref;
- int err;
- const char *argv[] = {"rev-list",
- "--quiet", "--objects", "--stdin", "--not", "--all", NULL};
+ struct ref *rm = ref_map;
/*
* If we are deepening a shallow clone we already have these
*/
if (depth)
return -1;
-
- if (!ref_map)
- return 0;
-
- memset(&revlist, 0, sizeof(revlist));
- revlist.argv = argv;
- revlist.git_cmd = 1;
- revlist.no_stdout = 1;
- revlist.no_stderr = 1;
- 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;
- }
-
- sigchain_pop(SIGPIPE);
-
- return finish_command(&revlist) || err;
+ return check_everything_connected(iterate_ref_map, 1, &rm);
}
static int fetch_refs(struct transport *transport, struct ref *ref_map)