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-rw-r--r--builtin/fetch.c920
1 files changed, 920 insertions, 0 deletions
diff --git a/builtin/fetch.c b/builtin/fetch.c
new file mode 100644
index 0000000..8654fa7
--- /dev/null
+++ b/builtin/fetch.c
@@ -0,0 +1,920 @@
+/*
+ * "git fetch"
+ */
+#include "cache.h"
+#include "refs.h"
+#include "commit.h"
+#include "builtin.h"
+#include "string-list.h"
+#include "remote.h"
+#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>...]",
+ "git fetch [options] <group>",
+ "git fetch --multiple [options] [<repository> | <group>]...",
+ "git fetch --all [options]",
+ NULL
+};
+
+enum {
+ TAGS_UNSET = 0,
+ TAGS_DEFAULT = 1,
+ TAGS_SET = 2
+};
+
+static int all, append, dry_run, force, keep, multiple, prune, update_head_ok, verbosity;
+static int tags = TAGS_DEFAULT;
+static const char *depth;
+static const char *upload_pack;
+static struct strbuf default_rla = STRBUF_INIT;
+static struct transport *transport;
+
+static struct option builtin_fetch_options[] = {
+ OPT__VERBOSITY(&verbosity),
+ OPT_BOOLEAN(0, "all", &all,
+ "fetch from all remotes"),
+ OPT_BOOLEAN('a', "append", &append,
+ "append to .git/FETCH_HEAD instead of overwriting"),
+ OPT_STRING(0, "upload-pack", &upload_pack, "PATH",
+ "path to upload pack on remote end"),
+ OPT_BOOLEAN('f', "force", &force,
+ "force overwrite of local branch"),
+ OPT_BOOLEAN('m', "multiple", &multiple,
+ "fetch from multiple remotes"),
+ OPT_SET_INT('t', "tags", &tags,
+ "fetch all tags and associated objects", TAGS_SET),
+ OPT_SET_INT('n', NULL, &tags,
+ "do not fetch all tags (--no-tags)", TAGS_UNSET),
+ OPT_BOOLEAN('p', "prune", &prune,
+ "prune tracking branches no longer on remote"),
+ OPT_BOOLEAN(0, "dry-run", &dry_run,
+ "dry run"),
+ OPT_BOOLEAN('k', "keep", &keep, "keep downloaded pack"),
+ OPT_BOOLEAN('u', "update-head-ok", &update_head_ok,
+ "allow updating of HEAD ref"),
+ OPT_STRING(0, "depth", &depth, "DEPTH",
+ "deepen history of shallow clone"),
+ OPT_END()
+};
+
+static void unlock_pack(void)
+{
+ if (transport)
+ transport_unlock_pack(transport);
+}
+
+static void unlock_pack_on_signal(int signo)
+{
+ unlock_pack();
+ sigchain_pop(signo);
+ raise(signo);
+}
+
+static void add_merge_config(struct ref **head,
+ const 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.$name.merge"
+ * to be honored by 'git pull', but we do not have to
+ * fail if branch.$name.merge is misconfigured to point
+ * at a nonexisting branch. If we were indeed called by
+ * 'git pull', it will notice the misconfiguration because
+ * there is no entry in the resulting FETCH_HEAD marked
+ * for merging.
+ */
+ refspec.src = branch->merge[i]->src;
+ refspec.dst = NULL;
+ refspec.pattern = 0;
+ refspec.force = 0;
+ get_fetch_map(remote_refs, &refspec, tail, 1);
+ for (rm = *old_tail; rm; rm = rm->next)
+ rm->merge = 1;
+ }
+}
+
+static void find_non_local_tags(struct transport *transport,
+ struct ref **head,
+ struct ref ***tail);
+
+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;
+
+ const struct ref *remote_refs = transport_get_remote_refs(transport);
+
+ if (ref_count || tags == TAGS_SET) {
+ for (i = 0; i < ref_count; i++) {
+ get_fetch_map(remote_refs, &refs[i], &tail, 0);
+ 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 == TAGS_SET)
+ get_fetch_map(remote_refs, tag_refspec, &tail, 0);
+ } 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, 0);
+ 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");
+ if (!ref_map)
+ die("Couldn't find remote ref HEAD");
+ ref_map->merge = 1;
+ tail = &ref_map->next;
+ }
+ }
+ if (tags == TAGS_DEFAULT && *autotags)
+ find_non_local_tags(transport, &ref_map, &tail);
+ ref_remove_duplicates(ref_map);
+
+ 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)
+{
+ char msg[1024];
+ char *rla = getenv("GIT_REFLOG_ACTION");
+ static struct ref_lock *lock;
+
+ if (dry_run)
+ return 0;
+ if (!rla)
+ rla = default_rla.buf;
+ 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 errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
+ STORE_REF_ERROR_OTHER;
+ if (write_ref_sha1(lock, ref->new_sha1, msg) < 0)
+ return errno == ENOTDIR ? STORE_REF_ERROR_DF_CONFLICT :
+ STORE_REF_ERROR_OTHER;
+ return 0;
+}
+
+#define SUMMARY_WIDTH (2 * DEFAULT_ABBREV + 3)
+#define REFCOL_WIDTH 10
+
+static int update_local_ref(struct ref *ref,
+ const char *remote,
+ char *display)
+{
+ struct commit *current = NULL, *updated;
+ enum object_type type;
+ struct branch *current_branch = branch_get(NULL);
+ const char *pretty_ref = prettify_refname(ref->name);
+
+ *display = 0;
+ type = sha1_object_info(ref->new_sha1, NULL);
+ if (type < 0)
+ die("object %s not found", sha1_to_hex(ref->new_sha1));
+
+ if (!hashcmp(ref->old_sha1, ref->new_sha1)) {
+ if (verbosity > 0)
+ sprintf(display, "= %-*s %-*s -> %s", SUMMARY_WIDTH,
+ "[up to date]", REFCOL_WIDTH, remote,
+ pretty_ref);
+ 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...
+ */
+ sprintf(display, "! %-*s %-*s -> %s (can't fetch in current branch)",
+ SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
+ pretty_ref);
+ return 1;
+ }
+
+ if (!is_null_sha1(ref->old_sha1) &&
+ !prefixcmp(ref->name, "refs/tags/")) {
+ int r;
+ r = s_update_ref("updating tag", ref, 0);
+ sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '-',
+ SUMMARY_WIDTH, "[tag update]", REFCOL_WIDTH, remote,
+ pretty_ref, r ? " (unable to update local ref)" : "");
+ return r;
+ }
+
+ current = lookup_commit_reference_gently(ref->old_sha1, 1);
+ updated = lookup_commit_reference_gently(ref->new_sha1, 1);
+ if (!current || !updated) {
+ const char *msg;
+ const char *what;
+ int r;
+ if (!strncmp(ref->name, "refs/tags/", 10)) {
+ msg = "storing tag";
+ what = "[new tag]";
+ }
+ else {
+ msg = "storing head";
+ what = "[new branch]";
+ }
+
+ r = s_update_ref(msg, ref, 0);
+ sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : '*',
+ SUMMARY_WIDTH, what, REFCOL_WIDTH, remote, pretty_ref,
+ r ? " (unable to update local ref)" : "");
+ return r;
+ }
+
+ if (in_merge_bases(current, &updated, 1)) {
+ char quickref[83];
+ int r;
+ strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
+ strcat(quickref, "..");
+ strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
+ r = s_update_ref("fast-forward", ref, 1);
+ sprintf(display, "%c %-*s %-*s -> %s%s", r ? '!' : ' ',
+ SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote,
+ pretty_ref, r ? " (unable to update local ref)" : "");
+ return r;
+ } else if (force || ref->force) {
+ char quickref[84];
+ int r;
+ strcpy(quickref, find_unique_abbrev(current->object.sha1, DEFAULT_ABBREV));
+ strcat(quickref, "...");
+ strcat(quickref, find_unique_abbrev(ref->new_sha1, DEFAULT_ABBREV));
+ r = s_update_ref("forced-update", ref, 1);
+ sprintf(display, "%c %-*s %-*s -> %s (%s)", r ? '!' : '+',
+ SUMMARY_WIDTH, quickref, REFCOL_WIDTH, remote,
+ pretty_ref,
+ r ? "unable to update local ref" : "forced update");
+ return r;
+ } else {
+ sprintf(display, "! %-*s %-*s -> %s (non-fast-forward)",
+ SUMMARY_WIDTH, "[rejected]", REFCOL_WIDTH, remote,
+ pretty_ref);
+ return 1;
+ }
+}
+
+static int store_updated_refs(const char *raw_url, const char *remote_name,
+ struct ref *ref_map)
+{
+ FILE *fp;
+ struct commit *commit;
+ int url_len, i, note_len, shown_url = 0, rc = 0;
+ char note[1024];
+ const char *what, *kind;
+ struct ref *rm;
+ char *url, *filename = dry_run ? "/dev/null" : git_path("FETCH_HEAD");
+
+ fp = fopen(filename, "a");
+ if (!fp)
+ return error("cannot open %s: %s\n", filename, strerror(errno));
+
+ if (raw_url)
+ 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;
+ }
+
+ 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[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);
+ else
+ sprintf(note, "* %-*s %-*s -> FETCH_HEAD",
+ SUMMARY_WIDTH, *kind ? kind : "branch",
+ REFCOL_WIDTH, *what ? what : "HEAD");
+ if (*note) {
+ if (verbosity >= 0 && !shown_url) {
+ fprintf(stderr, "From %.*s\n",
+ url_len, url);
+ shown_url = 1;
+ }
+ if (verbosity >= 0)
+ fprintf(stderr, " %s\n", note);
+ }
+ }
+ 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);
+ 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};
+
+ /*
+ * If we are deepening a shallow clone we already have these
+ * objects reachable. Running rev-list here will return with
+ * a good (0) exit status and we'll bypass the fetch that we
+ * really need to perform. Claiming failure now will ensure
+ * we perform the network exchange to deepen our history.
+ */
+ 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;
+}
+
+static int fetch_refs(struct transport *transport, struct ref *ref_map)
+{
+ int ret = quickfetch(ref_map);
+ if (ret)
+ ret = transport_fetch_refs(transport, ref_map);
+ if (!ret)
+ ret |= store_updated_refs(transport->url,
+ transport->remote->name,
+ ref_map);
+ transport_unlock_pack(transport);
+ return ret;
+}
+
+static int prune_refs(struct transport *transport, struct ref *ref_map)
+{
+ int result = 0;
+ struct ref *ref, *stale_refs = get_stale_heads(transport->remote, ref_map);
+ const char *dangling_msg = dry_run
+ ? " (%s will become dangling)\n"
+ : " (%s has become dangling)\n";
+
+ for (ref = stale_refs; ref; ref = ref->next) {
+ if (!dry_run)
+ result |= delete_ref(ref->name, NULL, 0);
+ if (verbosity >= 0) {
+ fprintf(stderr, " x %-*s %-*s -> %s\n",
+ SUMMARY_WIDTH, "[deleted]",
+ REFCOL_WIDTH, "(none)", prettify_refname(ref->name));
+ warn_dangling_symref(stderr, dangling_msg, ref->name);
+ }
+ }
+ free_refs(stale_refs);
+ return result;
+}
+
+static int add_existing(const char *refname, const unsigned char *sha1,
+ int flag, void *cbdata)
+{
+ struct string_list *list = (struct string_list *)cbdata;
+ struct string_list_item *item = string_list_insert(refname, list);
+ item->util = (void *)sha1;
+ return 0;
+}
+
+static int will_fetch(struct ref **head, const unsigned char *sha1)
+{
+ struct ref *rm = *head;
+ while (rm) {
+ if (!hashcmp(rm->old_sha1, sha1))
+ return 1;
+ rm = rm->next;
+ }
+ 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 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;
+
+ /*
+ * 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 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;
+
+ /* 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;
+
+ item = string_list_insert(ref->name, &remote_refs);
+ item->util = (void *)ref->old_sha1;
+ }
+ string_list_clear(&existing_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)
+{
+ struct branch *current_branch = branch_get(NULL);
+
+ if (is_bare_repository() || !current_branch)
+ return;
+
+ 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 %s "
+ "of non-bare repository", current_branch->refname);
+}
+
+static int do_fetch(struct transport *transport,
+ struct refspec *refs, int ref_count)
+{
+ struct string_list existing_refs = { NULL, 0, 0, 0 };
+ struct string_list_item *peer_item = NULL;
+ struct ref *ref_map;
+ struct ref *rm;
+ int autotags = (transport->remote->fetch_tags == 1);
+
+ for_each_ref(add_existing, &existing_refs);
+
+ if (transport->remote->fetch_tags == 2 && tags != TAGS_UNSET)
+ tags = TAGS_SET;
+ if (transport->remote->fetch_tags == -1)
+ tags = TAGS_UNSET;
+
+ 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 && !dry_run) {
+ char *filename = git_path("FETCH_HEAD");
+ FILE *fp = fopen(filename, "w");
+ if (!fp)
+ return error("cannot open %s: %s\n", filename, strerror(errno));
+ fclose(fp);
+ }
+
+ ref_map = get_ref_map(transport, refs, ref_count, tags, &autotags);
+ if (!update_head_ok)
+ check_not_current_branch(ref_map);
+
+ for (rm = ref_map; rm; rm = rm->next) {
+ if (rm->peer_ref) {
+ peer_item = string_list_lookup(rm->peer_ref->name,
+ &existing_refs);
+ if (peer_item)
+ hashcpy(rm->peer_ref->old_sha1,
+ peer_item->util);
+ }
+ }
+
+ if (tags == TAGS_DEFAULT && autotags)
+ transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
+ if (fetch_refs(transport, ref_map)) {
+ free_refs(ref_map);
+ return 1;
+ }
+ if (prune)
+ prune_refs(transport, ref_map);
+ free_refs(ref_map);
+
+ /* if neither --no-tags nor --tags was specified, do automated tag
+ * following ... */
+ if (tags == TAGS_DEFAULT && autotags) {
+ struct ref **tail = &ref_map;
+ ref_map = NULL;
+ find_non_local_tags(transport, &ref_map, &tail);
+ if (ref_map) {
+ transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
+ transport_set_option(transport, TRANS_OPT_DEPTH, "0");
+ fetch_refs(transport, ref_map);
+ }
+ free_refs(ref_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",
+ name, value, transport->url);
+ if (r > 0)
+ warning("Option \"%s\" is ignored for %s\n",
+ name, transport->url);
+}
+
+static int get_one_remote_for_fetch(struct remote *remote, void *priv)
+{
+ struct string_list *list = priv;
+ if (!remote->skip_default_update)
+ string_list_append(remote->name, list);
+ return 0;
+}
+
+struct remote_group_data {
+ const char *name;
+ struct string_list *list;
+};
+
+static int get_remote_group(const char *key, const char *value, void *priv)
+{
+ struct remote_group_data *g = priv;
+
+ if (!prefixcmp(key, "remotes.") &&
+ !strcmp(key + 8, g->name)) {
+ /* split list by white space */
+ int space = strcspn(value, " \t\n");
+ while (*value) {
+ if (space > 1) {
+ string_list_append(xstrndup(value, space),
+ g->list);
+ }
+ value += space + (value[space] != '\0');
+ space = strcspn(value, " \t\n");
+ }
+ }
+
+ return 0;
+}
+
+static int add_remote_or_group(const char *name, struct string_list *list)
+{
+ int prev_nr = list->nr;
+ struct remote_group_data g = { name, list };
+
+ git_config(get_remote_group, &g);
+ if (list->nr == prev_nr) {
+ struct remote *remote;
+ if (!remote_is_configured(name))
+ return 0;
+ remote = remote_get(name);
+ string_list_append(remote->name, list);
+ }
+ return 1;
+}
+
+static int fetch_multiple(struct string_list *list)
+{
+ int i, result = 0;
+ const char *argv[] = { "fetch", NULL, NULL, NULL, NULL, NULL, NULL };
+ int argc = 1;
+
+ if (dry_run)
+ argv[argc++] = "--dry-run";
+ if (prune)
+ argv[argc++] = "--prune";
+ if (verbosity >= 2)
+ argv[argc++] = "-v";
+ if (verbosity >= 1)
+ argv[argc++] = "-v";
+ else if (verbosity < 0)
+ argv[argc++] = "-q";
+
+ for (i = 0; i < list->nr; i++) {
+ const char *name = list->items[i].string;
+ argv[argc] = name;
+ if (verbosity >= 0)
+ printf("Fetching %s\n", name);
+ if (run_command_v_opt(argv, RUN_GIT_CMD)) {
+ error("Could not fetch %s", name);
+ result = 1;
+ }
+ }
+
+ return result;
+}
+
+static int fetch_one(struct remote *remote, int argc, const char **argv)
+{
+ int i;
+ static const char **refs = NULL;
+ int ref_nr = 0;
+ int exit_code;
+
+ if (!remote)
+ die("Where do you want to fetch from today?");
+
+ transport = transport_get(remote, NULL);
+ if (verbosity >= 2)
+ transport->verbose = verbosity <= 3 ? verbosity : 3;
+ if (verbosity < 0)
+ 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 (argc > 0) {
+ int j = 0;
+ refs = xcalloc(argc + 1, sizeof(const char *));
+ for (i = 0; i < argc; i++) {
+ if (!strcmp(argv[i], "tag")) {
+ char *ref;
+ i++;
+ if (i >= argc)
+ die("You need to specify a tag name.");
+ 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];
+ }
+ refs[j] = NULL;
+ ref_nr = j;
+ }
+
+ sigchain_push_common(unlock_pack_on_signal);
+ atexit(unlock_pack);
+ exit_code = do_fetch(transport,
+ parse_fetch_refspec(ref_nr, refs), ref_nr);
+ transport_disconnect(transport);
+ transport = NULL;
+ return exit_code;
+}
+
+int cmd_fetch(int argc, const char **argv, const char *prefix)
+{
+ int i;
+ struct string_list list = { NULL, 0, 0, 0 };
+ struct remote *remote;
+ int result = 0;
+
+ /* Record the command line for the reflog */
+ strbuf_addstr(&default_rla, "fetch");
+ for (i = 1; i < argc; i++)
+ strbuf_addf(&default_rla, " %s", argv[i]);
+
+ argc = parse_options(argc, argv, prefix,
+ builtin_fetch_options, builtin_fetch_usage, 0);
+
+ if (all) {
+ if (argc == 1)
+ die("fetch --all does not take a repository argument");
+ else if (argc > 1)
+ die("fetch --all does not make sense with refspecs");
+ (void) for_each_remote(get_one_remote_for_fetch, &list);
+ result = fetch_multiple(&list);
+ } else if (argc == 0) {
+ /* No arguments -- use default remote */
+ remote = remote_get(NULL);
+ result = fetch_one(remote, argc, argv);
+ } else if (multiple) {
+ /* All arguments are assumed to be remotes or groups */
+ for (i = 0; i < argc; i++)
+ if (!add_remote_or_group(argv[i], &list))
+ die("No such remote or remote group: %s", argv[i]);
+ result = fetch_multiple(&list);
+ } else {
+ /* Single remote or group */
+ (void) add_remote_or_group(argv[0], &list);
+ if (list.nr > 1) {
+ /* More than one remote */
+ if (argc > 1)
+ die("Fetching a group and specifying refspecs does not make sense");
+ result = fetch_multiple(&list);
+ } else {
+ /* Zero or one remotes */
+ remote = remote_get(argv[0]);
+ result = fetch_one(remote, argc-1, argv+1);
+ }
+ }
+
+ /* All names were strdup()ed or strndup()ed */
+ list.strdup_strings = 1;
+ string_list_clear(&list, 0);
+
+ return result;
+}