Merge branch 'jc/maint-fetch-tighten-refname-check'
[git/git.git] / remote.c
index 044f229..5882d11 100644 (file)
--- a/remote.c
+++ b/remote.c
@@ -7,6 +7,9 @@
 #include "dir.h"
 #include "tag.h"
 #include "string-list.h"
+#include "mergesort.h"
+
+enum map_direction { FROM_SRC, FROM_DST };
 
 static struct refspec s_tag_refspec = {
        0,
@@ -482,7 +485,7 @@ static void read_config(void)
                return;
        default_remote_name = xstrdup("origin");
        current_branch = NULL;
-       head_ref = resolve_ref("HEAD", sha1, 0, &flag);
+       head_ref = resolve_ref_unsafe("HEAD", sha1, 0, &flag);
        if (head_ref && (flag & REF_ISSYMREF) &&
            !prefixcmp(head_ref, "refs/heads/")) {
                current_branch =
@@ -916,6 +919,27 @@ void free_refs(struct ref *ref)
        }
 }
 
+int ref_compare_name(const void *va, const void *vb)
+{
+       const struct ref *a = va, *b = vb;
+       return strcmp(a->name, b->name);
+}
+
+static void *ref_list_get_next(const void *a)
+{
+       return ((const struct ref *)a)->next;
+}
+
+static void ref_list_set_next(void *a, void *next)
+{
+       ((struct ref *)a)->next = next;
+}
+
+void sort_ref_list(struct ref **l, int (*cmp)(const void *, const void *))
+{
+       *l = llist_mergesort(*l, ref_list_get_next, ref_list_set_next, cmp);
+}
+
 static int count_refspec_match(const char *pattern,
                               struct ref *refs,
                               struct ref **matched_ref)
@@ -978,16 +1002,20 @@ static void tail_link_ref(struct ref *ref, struct ref ***tail)
        *tail = &ref->next;
 }
 
+static struct ref *alloc_delete_ref(void)
+{
+       struct ref *ref = alloc_ref("(delete)");
+       hashclr(ref->new_sha1);
+       return ref;
+}
+
 static struct ref *try_explicit_object_name(const char *name)
 {
        unsigned char sha1[20];
        struct ref *ref;
 
-       if (!*name) {
-               ref = alloc_ref("(delete)");
-               hashclr(ref->new_sha1);
-               return ref;
-       }
+       if (!*name)
+               return alloc_delete_ref();
        if (get_sha1(name, sha1))
                return NULL;
        ref = alloc_ref(name);
@@ -1007,7 +1035,7 @@ static char *guess_ref(const char *name, struct ref *peer)
        struct strbuf buf = STRBUF_INIT;
        unsigned char sha1[20];
 
-       const char *r = resolve_ref(peer->name, sha1, 1, NULL);
+       const char *r = resolve_ref_unsafe(peer->name, sha1, 1, NULL);
        if (!r)
                return NULL;
 
@@ -1058,7 +1086,7 @@ static int match_explicit(struct ref *src, struct ref *dst,
                unsigned char sha1[20];
                int flag;
 
-               dst_value = resolve_ref(matched_src->name, sha1, 1, &flag);
+               dst_value = resolve_ref_unsafe(matched_src->name, sha1, 1, &flag);
                if (!dst_value ||
                    ((flag & REF_ISSYMREF) &&
                     prefixcmp(dst_value, "refs/heads/")))
@@ -1072,6 +1100,9 @@ static int match_explicit(struct ref *src, struct ref *dst,
        case 0:
                if (!memcmp(dst_value, "refs/", 5))
                        matched_dst = make_linked_ref(dst_value, dst_tail);
+               else if (is_null_sha1(matched_src->new_sha1))
+                       error("unable to delete '%s': remote ref does not exist",
+                             dst_value);
                else if ((dst_guess = guess_ref(dst_value, matched_src)))
                        matched_dst = make_linked_ref(dst_guess, dst_tail);
                else
@@ -1110,10 +1141,11 @@ static int match_explicit_refs(struct ref *src, struct ref *dst,
        return errs;
 }
 
-static const struct refspec *check_pattern_match(const struct refspec *rs,
-                                                int rs_nr,
-                                                const struct ref *src)
+static char *get_ref_match(const struct refspec *rs, int rs_nr, const struct ref *ref,
+               int send_mirror, int direction, const struct refspec **ret_pat)
 {
+       const struct refspec *pat;
+       char *name;
        int i;
        int matching_refs = -1;
        for (i = 0; i < rs_nr; i++) {
@@ -1123,14 +1155,36 @@ static const struct refspec *check_pattern_match(const struct refspec *rs,
                        continue;
                }
 
-               if (rs[i].pattern && match_name_with_pattern(rs[i].src, src->name,
-                                                            NULL, NULL))
-                       return rs + i;
+               if (rs[i].pattern) {
+                       const char *dst_side = rs[i].dst ? rs[i].dst : rs[i].src;
+                       int match;
+                       if (direction == FROM_SRC)
+                               match = match_name_with_pattern(rs[i].src, ref->name, dst_side, &name);
+                       else
+                               match = match_name_with_pattern(dst_side, ref->name, rs[i].src, &name);
+                       if (match) {
+                               matching_refs = i;
+                               break;
+                       }
+               }
        }
-       if (matching_refs != -1)
-               return rs + matching_refs;
-       else
+       if (matching_refs == -1)
                return NULL;
+
+       pat = rs + matching_refs;
+       if (pat->matching) {
+               /*
+                * "matching refs"; traditionally we pushed everything
+                * including refs outside refs/heads/ hierarchy, but
+                * that does not make much sense these days.
+                */
+               if (!send_mirror && prefixcmp(ref->name, "refs/heads/"))
+                       return NULL;
+               name = xstrdup(ref->name);
+       }
+       if (ret_pat)
+               *ret_pat = pat;
+       return name;
 }
 
 static struct ref **tail_ref(struct ref **head)
@@ -1155,9 +1209,10 @@ int match_push_refs(struct ref *src, struct ref **dst,
        struct refspec *rs;
        int send_all = flags & MATCH_REFS_ALL;
        int send_mirror = flags & MATCH_REFS_MIRROR;
+       int send_prune = flags & MATCH_REFS_PRUNE;
        int errs;
        static const char *default_refspec[] = { ":", NULL };
-       struct ref **dst_tail = tail_ref(dst);
+       struct ref *ref, **dst_tail = tail_ref(dst);
 
        if (!nr_refspec) {
                nr_refspec = 1;
@@ -1167,39 +1222,23 @@ int match_push_refs(struct ref *src, struct ref **dst,
        errs = match_explicit_refs(src, *dst, &dst_tail, rs, nr_refspec);
 
        /* pick the remainder */
-       for ( ; src; src = src->next) {
+       for (ref = src; ref; ref = ref->next) {
                struct ref *dst_peer;
                const struct refspec *pat = NULL;
                char *dst_name;
-               if (src->peer_ref)
-                       continue;
 
-               pat = check_pattern_match(rs, nr_refspec, src);
-               if (!pat)
+               if (ref->peer_ref)
                        continue;
 
-               if (pat->matching) {
-                       /*
-                        * "matching refs"; traditionally we pushed everything
-                        * including refs outside refs/heads/ hierarchy, but
-                        * that does not make much sense these days.
-                        */
-                       if (!send_mirror && prefixcmp(src->name, "refs/heads/"))
-                               continue;
-                       dst_name = xstrdup(src->name);
+               dst_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_SRC, &pat);
+               if (!dst_name)
+                       continue;
 
-               } else {
-                       const char *dst_side = pat->dst ? pat->dst : pat->src;
-                       if (!match_name_with_pattern(pat->src, src->name,
-                                                    dst_side, &dst_name))
-                               die("Didn't think it matches any more");
-               }
                dst_peer = find_ref_by_name(*dst, dst_name);
                if (dst_peer) {
                        if (dst_peer->peer_ref)
                                /* We're already sending something to this ref. */
                                goto free_name;
-
                } else {
                        if (pat->matching && !(send_all || send_mirror))
                                /*
@@ -1211,13 +1250,30 @@ int match_push_refs(struct ref *src, struct ref **dst,
 
                        /* Create a new one and link it */
                        dst_peer = make_linked_ref(dst_name, &dst_tail);
-                       hashcpy(dst_peer->new_sha1, src->new_sha1);
+                       hashcpy(dst_peer->new_sha1, ref->new_sha1);
                }
-               dst_peer->peer_ref = copy_ref(src);
+               dst_peer->peer_ref = copy_ref(ref);
                dst_peer->force = pat->force;
        free_name:
                free(dst_name);
        }
+       if (send_prune) {
+               /* check for missing refs on the remote */
+               for (ref = *dst; ref; ref = ref->next) {
+                       char *src_name;
+
+                       if (ref->peer_ref)
+                               /* We're already sending something to this ref. */
+                               continue;
+
+                       src_name = get_ref_match(rs, nr_refspec, ref, send_mirror, FROM_DST, NULL);
+                       if (src_name) {
+                               if (!find_ref_by_name(src, src_name))
+                                       ref->peer_ref = alloc_delete_ref();
+                               free(src_name);
+                       }
+               }
+       }
        if (errs)
                return -1;
        return 0;
@@ -1507,13 +1563,13 @@ int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs)
         * nothing to report.
         */
        base = branch->merge[0]->dst;
-       if (!resolve_ref(base, sha1, 1, NULL))
+       if (read_ref(base, sha1))
                return 0;
        theirs = lookup_commit_reference(sha1);
        if (!theirs)
                return 0;
 
-       if (!resolve_ref(branch->refname, sha1, 1, NULL))
+       if (read_ref(branch->refname, sha1))
                return 0;
        ours = lookup_commit_reference(sha1);
        if (!ours)
@@ -1572,19 +1628,29 @@ int format_tracking_info(struct branch *branch, struct strbuf *sb)
        base = branch->merge[0]->dst;
        base = shorten_unambiguous_ref(base, 0);
        if (!num_theirs)
-               strbuf_addf(sb, "Your branch is ahead of '%s' "
-                           "by %d commit%s.\n",
-                           base, num_ours, (num_ours == 1) ? "" : "s");
+               strbuf_addf(sb,
+                       Q_("Your branch is ahead of '%s' by %d commit.\n",
+                          "Your branch is ahead of '%s' by %d commits.\n",
+                          num_ours),
+                       base, num_ours);
        else if (!num_ours)
-               strbuf_addf(sb, "Your branch is behind '%s' "
-                           "by %d commit%s, "
-                           "and can be fast-forwarded.\n",
-                           base, num_theirs, (num_theirs == 1) ? "" : "s");
+               strbuf_addf(sb,
+                       Q_("Your branch is behind '%s' by %d commit, "
+                              "and can be fast-forwarded.\n",
+                          "Your branch is behind '%s' by %d commits, "
+                              "and can be fast-forwarded.\n",
+                          num_theirs),
+                       base, num_theirs);
        else
-               strbuf_addf(sb, "Your branch and '%s' have diverged,\n"
-                           "and have %d and %d different commit(s) each, "
-                           "respectively.\n",
-                           base, num_ours, num_theirs);
+               strbuf_addf(sb,
+                       Q_("Your branch and '%s' have diverged,\n"
+                              "and have %d and %d different commit each, "
+                              "respectively.\n",
+                          "Your branch and '%s' have diverged,\n"
+                              "and have %d and %d different commits each, "
+                              "respectively.\n",
+                          num_theirs),
+                       base, num_ours, num_theirs);
        return 1;
 }