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-rw-r--r--builtin-fetch.c578
1 files changed, 578 insertions, 0 deletions
diff --git a/builtin-fetch.c b/builtin-fetch.c
new file mode 100644
index 000000000..b9d2b0c27
--- /dev/null
+++ b/builtin-fetch.c
@@ -0,0 +1,578 @@
+/*
+ * "git fetch"
+ */
+#include "cache.h"
+#include "refs.h"
+#include "commit.h"
+#include "builtin.h"
+#include "path-list.h"
+#include "remote.h"
+#include "transport.h"
+
+static const char fetch_usage[] = "git-fetch [-a | --append] [--upload-pack <upload-pack>] [-f | --force] [--no-tags] [-t | --tags] [-k | --keep] [-u | --update-head-ok] [--depth <depth>] [-v | --verbose] [<repository> <refspec>...]";
+
+static int append, force, tags, no_tags, update_head_ok, verbose, quiet;
+static char *default_rla = NULL;
+static struct transport *transport;
+
+static void unlock_pack(void)
+{
+ if (transport)
+ transport_unlock_pack(transport);
+}
+
+static void unlock_pack_on_signal(int signo)
+{
+ unlock_pack();
+ signal(SIGINT, SIG_DFL);
+ raise(signo);
+}
+
+static void add_merge_config(struct ref **head,
+ struct ref *remote_refs,
+ struct branch *branch,
+ struct ref ***tail)
+{
+ int i;
+
+ for (i = 0; i < branch->merge_nr; i++) {
+ struct ref *rm, **old_tail = *tail;
+ struct refspec refspec;
+
+ for (rm = *head; rm; rm = rm->next) {
+ if (branch_merge_matches(branch, i, rm->name)) {
+ rm->merge = 1;
+ break;
+ }
+ }
+ if (rm)
+ continue;
+
+ /* Not fetched to a tracking branch? We need to fetch
+ * it anyway to allow this branch's "branch.$name.merge"
+ * to be honored by git-pull.
+ */
+ refspec.src = branch->merge[i]->src;
+ refspec.dst = NULL;
+ refspec.pattern = 0;
+ refspec.force = 0;
+ get_fetch_map(remote_refs, &refspec, tail);
+ for (rm = *old_tail; rm; rm = rm->next)
+ rm->merge = 1;
+ }
+}
+
+static struct ref *get_ref_map(struct transport *transport,
+ struct refspec *refs, int ref_count, int tags,
+ int *autotags)
+{
+ int i;
+ struct ref *rm;
+ struct ref *ref_map = NULL;
+ struct ref **tail = &ref_map;
+
+ struct ref *remote_refs = transport_get_remote_refs(transport);
+
+ if (ref_count || tags) {
+ for (i = 0; i < ref_count; i++) {
+ get_fetch_map(remote_refs, &refs[i], &tail);
+ if (refs[i].dst && refs[i].dst[0])
+ *autotags = 1;
+ }
+ /* Merge everything on the command line, but not --tags */
+ for (rm = ref_map; rm; rm = rm->next)
+ rm->merge = 1;
+ if (tags) {
+ struct refspec refspec;
+ refspec.src = "refs/tags/";
+ refspec.dst = "refs/tags/";
+ refspec.pattern = 1;
+ refspec.force = 0;
+ get_fetch_map(remote_refs, &refspec, &tail);
+ }
+ } else {
+ /* Use the defaults */
+ struct remote *remote = transport->remote;
+ struct branch *branch = branch_get(NULL);
+ int has_merge = branch_has_merge_config(branch);
+ if (remote && (remote->fetch_refspec_nr || has_merge)) {
+ for (i = 0; i < remote->fetch_refspec_nr; i++) {
+ get_fetch_map(remote_refs, &remote->fetch[i], &tail);
+ if (remote->fetch[i].dst &&
+ remote->fetch[i].dst[0])
+ *autotags = 1;
+ if (!i && !has_merge && ref_map &&
+ !remote->fetch[0].pattern)
+ ref_map->merge = 1;
+ }
+ /*
+ * if the remote we're fetching from is the same
+ * as given in branch.<name>.remote, we add the
+ * ref given in branch.<name>.merge, too.
+ */
+ if (has_merge && !strcmp(branch->remote_name,
+ remote->name))
+ add_merge_config(&ref_map, remote_refs, branch, &tail);
+ } else {
+ ref_map = get_remote_ref(remote_refs, "HEAD");
+ ref_map->merge = 1;
+ }
+ }
+ ref_remove_duplicates(ref_map);
+
+ return ref_map;
+}
+
+static void show_new(enum object_type type, unsigned char *sha1_new)
+{
+ fprintf(stderr, " %s: %s\n", typename(type),
+ find_unique_abbrev(sha1_new, DEFAULT_ABBREV));
+}
+
+static int s_update_ref(const char *action,
+ struct ref *ref,
+ int check_old)
+{
+ char msg[1024];
+ char *rla = getenv("GIT_REFLOG_ACTION");
+ static struct ref_lock *lock;
+
+ if (!rla)
+ rla = default_rla;
+ snprintf(msg, sizeof(msg), "%s: %s", rla, action);
+ lock = lock_any_ref_for_update(ref->name,
+ check_old ? ref->old_sha1 : NULL, 0);
+ if (!lock)
+ return 1;
+ if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
+ return 1;
+ return 0;
+}
+
+static int update_local_ref(struct ref *ref,
+ const char *note,
+ int verbose)
+{
+ char oldh[41], newh[41];
+ struct commit *current = NULL, *updated;
+ enum object_type type;
+ struct branch *current_branch = branch_get(NULL);
+
+ type = sha1_object_info(ref->new_sha1, NULL);
+ if (type < 0)
+ die("object %s not found", sha1_to_hex(ref->new_sha1));
+
+ if (!*ref->name) {
+ /* Not storing */
+ if (verbose) {
+ fprintf(stderr, "* fetched %s\n", note);
+ show_new(type, ref->new_sha1);
+ }
+ return 0;
+ }
+
+ if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
+ if (verbose) {
+ fprintf(stderr, "* %s: same as %s\n",
+ ref->name, note);
+ show_new(type, ref->new_sha1);
+ }
+ return 0;
+ }
+
+ if (current_branch &&
+ !strcmp(ref->name, current_branch->name) &&
+ !(update_head_ok || is_bare_repository()) &&
+ !is_null_sha1(ref->old_sha1)) {
+ /*
+ * If this is the head, and it's not okay to update
+ * the head, and the old value of the head isn't empty...
+ */
+ fprintf(stderr,
+ " * %s: Cannot fetch into the current branch.\n",
+ ref->name);
+ return 1;
+ }
+
+ if (!is_null_sha1(ref->old_sha1) &&
+ !prefixcmp(ref->name, "refs/tags/")) {
+ fprintf(stderr, "* %s: updating with %s\n",
+ ref->name, note);
+ show_new(type, ref->new_sha1);
+ return s_update_ref("updating tag", ref, 0);
+ }
+
+ current = lookup_commit_reference_gently(ref->old_sha1, 1);
+ updated = lookup_commit_reference_gently(ref->new_sha1, 1);
+ if (!current || !updated) {
+ char *msg;
+ if (!strncmp(ref->name, "refs/tags/", 10))
+ msg = "storing tag";
+ else
+ msg = "storing head";
+ fprintf(stderr, "* %s: storing %s\n",
+ ref->name, note);
+ show_new(type, ref->new_sha1);
+ return s_update_ref(msg, ref, 0);
+ }
+
+ strcpy(oldh, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
+ strcpy(newh, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
+
+ if (in_merge_bases(current, &updated, 1)) {
+ fprintf(stderr, "* %s: fast forward to %s\n",
+ ref->name, note);
+ fprintf(stderr, " old..new: %s..%s\n", oldh, newh);
+ return s_update_ref("fast forward", ref, 1);
+ }
+ if (!force && !ref->force) {
+ fprintf(stderr,
+ "* %s: not updating to non-fast forward %s\n",
+ ref->name, note);
+ fprintf(stderr,
+ " old...new: %s...%s\n", oldh, newh);
+ return 1;
+ }
+ fprintf(stderr,
+ "* %s: forcing update to non-fast forward %s\n",
+ ref->name, note);
+ fprintf(stderr, " old...new: %s...%s\n", oldh, newh);
+ return s_update_ref("forced-update", ref, 1);
+}
+
+static void store_updated_refs(const char *url, struct ref *ref_map)
+{
+ FILE *fp;
+ struct commit *commit;
+ int url_len, i, note_len;
+ char note[1024];
+ const char *what, *kind;
+ struct ref *rm;
+
+ fp = fopen(git_path("FETCH_HEAD"), "a");
+ 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;
+ }
+
+ commit = lookup_commit_reference_gently(rm->old_sha1, 1);
+ if (!commit)
+ rm->merge = 0;
+
+ 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 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;
+
+ note_len = 0;
+ if (*what) {
+ if (*kind)
+ note_len += sprintf(note + note_len, "%s ",
+ 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",
+ sha1_to_hex(commit ? commit->object.sha1 :
+ rm->old_sha1),
+ rm->merge ? "" : "not-for-merge",
+ note);
+
+ if (ref)
+ update_local_ref(ref, note, verbose);
+ }
+ fclose(fp);
+}
+
+static int fetch_refs(struct transport *transport, struct ref *ref_map)
+{
+ int ret = transport_fetch_refs(transport, ref_map);
+ if (!ret)
+ store_updated_refs(transport->url, ref_map);
+ transport_unlock_pack(transport);
+ return ret;
+}
+
+static int add_existing(const char *refname, const unsigned char *sha1,
+ int flag, void *cbdata)
+{
+ struct path_list *list = (struct path_list *)cbdata;
+ path_list_insert(refname, list);
+ return 0;
+}
+
+static struct ref *find_non_local_tags(struct transport *transport,
+ struct ref *fetch_map)
+{
+ static struct path_list existing_refs = { NULL, 0, 0, 0 };
+ struct path_list new_refs = { NULL, 0, 0, 1 };
+ char *ref_name;
+ int ref_name_len;
+ unsigned char *ref_sha1;
+ struct ref *tag_ref;
+ struct ref *rm = NULL;
+ struct ref *ref_map = NULL;
+ struct ref **tail = &ref_map;
+ struct ref *ref;
+
+ 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;
+ }
+ }
+
+ if (!path_list_has_path(&existing_refs, ref_name) &&
+ !path_list_has_path(&new_refs, ref_name) &&
+ lookup_object(ref->old_sha1)) {
+ fprintf(stderr, "Auto-following %s\n",
+ ref_name);
+
+ path_list_insert(ref_name, &new_refs);
+
+ rm = alloc_ref(strlen(ref_name) + 1);
+ strcpy(rm->name, ref_name);
+ rm->peer_ref = alloc_ref(strlen(ref_name) + 1);
+ strcpy(rm->peer_ref->name, ref_name);
+ hashcpy(rm->old_sha1, ref_sha1);
+
+ *tail = rm;
+ tail = &rm->next;
+ }
+ free(ref_name);
+ }
+
+ return ref_map;
+}
+
+static int do_fetch(struct transport *transport,
+ struct refspec *refs, int ref_count)
+{
+ struct ref *ref_map, *fetch_map;
+ struct ref *rm;
+ int autotags = (transport->remote->fetch_tags == 1);
+ if (transport->remote->fetch_tags == 2 && !no_tags)
+ tags = 1;
+ if (transport->remote->fetch_tags == -1)
+ no_tags = 1;
+
+ if (!transport->get_refs_list || !transport->fetch)
+ die("Don't know how to fetch from %s", transport->url);
+
+ /* if not appending, truncate FETCH_HEAD */
+ if (!append)
+ fclose(fopen(git_path("FETCH_HEAD"), "w"));
+
+ ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
+
+ for (rm = ref_map; rm; rm = rm->next) {
+ if (rm->peer_ref)
+ read_ref(rm->peer_ref->name, rm->peer_ref->old_sha1);
+ }
+
+ if (fetch_refs(transport, ref_map)) {
+ free_refs(ref_map);
+ return 1;
+ }
+
+ fetch_map = ref_map;
+
+ /* if neither --no-tags nor --tags was specified, do automated tag
+ * following ... */
+ if (!(tags || no_tags) && autotags) {
+ ref_map = find_non_local_tags(transport, fetch_map);
+ if (ref_map) {
+ transport_set_option(transport, TRANS_OPT_DEPTH, "0");
+ fetch_refs(transport, ref_map);
+ }
+ free_refs(ref_map);
+ }
+
+ free_refs(fetch_map);
+
+ return 0;
+}
+
+static void set_option(const char *name, const char *value)
+{
+ int r = transport_set_option(transport, name, value);
+ if (r < 0)
+ die("Option \"%s\" value \"%s\" is not valid for %s\n",
+ name, value, transport->url);
+ if (r > 0)
+ warning("Option \"%s\" is ignored for %s\n",
+ name, transport->url);
+}
+
+int cmd_fetch(int argc, const char **argv, const char *prefix)
+{
+ struct remote *remote;
+ int i, j, rla_offset;
+ static const char **refs = NULL;
+ int ref_nr = 0;
+ int cmd_len = 0;
+ const char *depth = NULL, *upload_pack = NULL;
+ int keep = 0;
+
+ for (i = 1; i < argc; i++) {
+ const char *arg = argv[i];
+ cmd_len += strlen(arg);
+
+ if (arg[0] != '-')
+ break;
+ if (!strcmp(arg, "--append") || !strcmp(arg, "-a")) {
+ append = 1;
+ continue;
+ }
+ if (!prefixcmp(arg, "--upload-pack=")) {
+ upload_pack = arg + 14;
+ continue;
+ }
+ if (!strcmp(arg, "--upload-pack")) {
+ i++;
+ if (i == argc)
+ usage(fetch_usage);
+ upload_pack = argv[i];
+ continue;
+ }
+ if (!strcmp(arg, "--force") || !strcmp(arg, "-f")) {
+ force = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--no-tags")) {
+ no_tags = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--tags") || !strcmp(arg, "-t")) {
+ tags = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--keep") || !strcmp(arg, "-k")) {
+ keep = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--update-head-ok") || !strcmp(arg, "-u")) {
+ update_head_ok = 1;
+ continue;
+ }
+ if (!prefixcmp(arg, "--depth=")) {
+ depth = arg + 8;
+ continue;
+ }
+ if (!strcmp(arg, "--depth")) {
+ i++;
+ if (i == argc)
+ usage(fetch_usage);
+ depth = argv[i];
+ continue;
+ }
+ if (!strcmp(arg, "--quiet")) {
+ quiet = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--verbose") || !strcmp(arg, "-v")) {
+ verbose++;
+ continue;
+ }
+ usage(fetch_usage);
+ }
+
+ for (j = i; j < argc; j++)
+ cmd_len += strlen(argv[j]);
+
+ default_rla = xmalloc(cmd_len + 5 + argc + 1);
+ sprintf(default_rla, "fetch");
+ rla_offset = strlen(default_rla);
+ for (j = 1; j < argc; j++) {
+ sprintf(default_rla + rla_offset, " %s", argv[j]);
+ rla_offset += strlen(argv[j]) + 1;
+ }
+
+ if (i == argc)
+ remote = remote_get(NULL);
+ else
+ remote = remote_get(argv[i++]);
+
+ transport = transport_get(remote, remote->url[0]);
+ if (verbose >= 2)
+ transport->verbose = 1;
+ if (quiet)
+ transport->verbose = -1;
+ if (upload_pack)
+ set_option(TRANS_OPT_UPLOADPACK, upload_pack);
+ if (keep)
+ set_option(TRANS_OPT_KEEP, "yes");
+ if (depth)
+ set_option(TRANS_OPT_DEPTH, depth);
+
+ if (!transport->url)
+ die("Where do you want to fetch from today?");
+
+ if (i < argc) {
+ int j = 0;
+ refs = xcalloc(argc - i + 1, sizeof(const char *));
+ while (i < argc) {
+ if (!strcmp(argv[i], "tag")) {
+ char *ref;
+ i++;
+ ref = xmalloc(strlen(argv[i]) * 2 + 22);
+ strcpy(ref, "refs/tags/");
+ strcat(ref, argv[i]);
+ strcat(ref, ":refs/tags/");
+ strcat(ref, argv[i]);
+ refs[j++] = ref;
+ } else
+ refs[j++] = argv[i];
+ i++;
+ }
+ refs[j] = NULL;
+ ref_nr = j;
+ }
+
+ signal(SIGINT, unlock_pack_on_signal);
+ atexit(unlock_pack);
+ return do_fetch(transport, parse_ref_spec(ref_nr, refs), ref_nr);
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-15 09:26:19 +0000