Add initial support for many promisor remotes
[gitweb.git] / remote.c
index 70aba02c7453b8153b08a1f66852e5bae80707e6..e50f7602eda56e0fb9deeedcd9d3d4e0a800a822 100644 (file)
--- a/remote.c
+++ b/remote.c
@@ -13,6 +13,7 @@
 #include "mergesort.h"
 #include "argv-array.h"
 #include "commit-reach.h"
+#include "advice.h"
 
 enum map_direction { FROM_SRC, FROM_DST };
 
@@ -336,14 +337,14 @@ static int handle_config(const char *key, const char *value, void *cb)
                if (!name)
                        return 0;
                if (!strcmp(subkey, "insteadof")) {
-                       rewrite = make_rewrite(&rewrites, name, namelen);
                        if (!value)
                                return config_error_nonbool(key);
+                       rewrite = make_rewrite(&rewrites, name, namelen);
                        add_instead_of(rewrite, xstrdup(value));
                } else if (!strcmp(subkey, "pushinsteadof")) {
-                       rewrite = make_rewrite(&rewrites_push, name, namelen);
                        if (!value)
                                return config_error_nonbool(key);
+                       rewrite = make_rewrite(&rewrites_push, name, namelen);
                        add_instead_of(rewrite, xstrdup(value));
                }
        }
@@ -819,11 +820,11 @@ struct ref *copy_ref_list(const struct ref *ref)
        return ret;
 }
 
-static void free_ref(struct ref *ref)
+void free_one_ref(struct ref *ref)
 {
        if (!ref)
                return;
-       free_ref(ref->peer_ref);
+       free_one_ref(ref->peer_ref);
        free(ref->remote_status);
        free(ref->symref);
        free(ref);
@@ -834,7 +835,7 @@ void free_refs(struct ref *ref)
        struct ref *next;
        while (ref) {
                next = ref->next;
-               free_ref(ref);
+               free_one_ref(ref);
                ref = next;
        }
 }
@@ -968,12 +969,13 @@ static char *guess_ref(const char *name, struct ref *peer)
        if (!r)
                return NULL;
 
-       if (starts_with(r, "refs/heads/"))
+       if (starts_with(r, "refs/heads/")) {
                strbuf_addstr(&buf, "refs/heads/");
-       else if (starts_with(r, "refs/tags/"))
+       } else if (starts_with(r, "refs/tags/")) {
                strbuf_addstr(&buf, "refs/tags/");
-       else
+       } else {
                return NULL;
+       }
 
        strbuf_addstr(&buf, name);
        return strbuf_detach(&buf, NULL);
@@ -1004,6 +1006,62 @@ static int match_explicit_lhs(struct ref *src,
        }
 }
 
+static void show_push_unqualified_ref_name_error(const char *dst_value,
+                                                const char *matched_src_name)
+{
+       struct object_id oid;
+       enum object_type type;
+
+       /*
+        * TRANSLATORS: "matches '%s'%" is the <dst> part of "git push
+        * <remote> <src>:<dst>" push, and "being pushed ('%s')" is
+        * the <src>.
+        */
+       error(_("The destination you provided is not a full refname (i.e.,\n"
+               "starting with \"refs/\"). We tried to guess what you meant by:\n"
+               "\n"
+               "- Looking for a ref that matches '%s' on the remote side.\n"
+               "- Checking if the <src> being pushed ('%s')\n"
+               "  is a ref in \"refs/{heads,tags}/\". If so we add a corresponding\n"
+               "  refs/{heads,tags}/ prefix on the remote side.\n"
+               "\n"
+               "Neither worked, so we gave up. You must fully qualify the ref."),
+             dst_value, matched_src_name);
+
+       if (!advice_push_unqualified_ref_name)
+               return;
+
+       if (get_oid(matched_src_name, &oid))
+               BUG("'%s' is not a valid object, "
+                   "match_explicit_lhs() should catch this!",
+                   matched_src_name);
+       type = oid_object_info(the_repository, &oid, NULL);
+       if (type == OBJ_COMMIT) {
+               advise(_("The <src> part of the refspec is a commit object.\n"
+                        "Did you mean to create a new branch by pushing to\n"
+                        "'%s:refs/heads/%s'?"),
+                      matched_src_name, dst_value);
+       } else if (type == OBJ_TAG) {
+               advise(_("The <src> part of the refspec is a tag object.\n"
+                        "Did you mean to create a new tag by pushing to\n"
+                        "'%s:refs/tags/%s'?"),
+                      matched_src_name, dst_value);
+       } else if (type == OBJ_TREE) {
+               advise(_("The <src> part of the refspec is a tree object.\n"
+                        "Did you mean to tag a new tree by pushing to\n"
+                        "'%s:refs/tags/%s'?"),
+                      matched_src_name, dst_value);
+       } else if (type == OBJ_BLOB) {
+               advise(_("The <src> part of the refspec is a blob object.\n"
+                        "Did you mean to tag a new blob by pushing to\n"
+                        "'%s:refs/tags/%s'?"),
+                      matched_src_name, dst_value);
+       } else {
+               BUG("'%s' should be commit/tag/tree/blob, is '%d'",
+                   matched_src_name, type);
+       }
+}
+
 static int match_explicit(struct ref *src, struct ref *dst,
                          struct ref ***dst_tail,
                          struct refspec_item *rs)
@@ -1038,21 +1096,18 @@ static int match_explicit(struct ref *src, struct ref *dst,
        case 1:
                break;
        case 0:
-               if (starts_with(dst_value, "refs/"))
+               if (starts_with(dst_value, "refs/")) {
                        matched_dst = make_linked_ref(dst_value, dst_tail);
-               else if (is_null_oid(&matched_src->new_oid))
+               } else if (is_null_oid(&matched_src->new_oid)) {
                        error(_("unable to delete '%s': remote ref does not exist"),
                              dst_value);
-               else if ((dst_guess = guess_ref(dst_value, matched_src))) {
+               else if ((dst_guess = guess_ref(dst_value, matched_src))) {
                        matched_dst = make_linked_ref(dst_guess, dst_tail);
                        free(dst_guess);
-               } else
-                       error(_("unable to push to unqualified destination: %s\n"
-                               "The destination refspec neither matches an "
-                               "existing ref on the remote nor\n"
-                               "begins with refs/, and we are unable to "
-                               "guess a prefix based on the source ref."),
-                             dst_value);
+               } else {
+                       show_push_unqualified_ref_name_error(dst_value,
+                                                            matched_src->name);
+               }
                break;
        default:
                matched_dst = NULL;
@@ -1825,37 +1880,27 @@ int resolve_remote_symref(struct ref *ref, struct ref *list)
 }
 
 /*
- * Lookup the upstream branch for the given branch and if present, optionally
- * compute the commit ahead/behind values for the pair.
+ * Compute the commit ahead/behind values for the pair branch_name, base.
  *
  * If abf is AHEAD_BEHIND_FULL, compute the full ahead/behind and return the
  * counts in *num_ours and *num_theirs.  If abf is AHEAD_BEHIND_QUICK, skip
  * the (potentially expensive) a/b computation (*num_ours and *num_theirs are
  * set to zero).
  *
- * The name of the upstream branch (or NULL if no upstream is defined) is
- * returned via *upstream_name, if it is not itself NULL.
- *
- * Returns -1 if num_ours and num_theirs could not be filled in (e.g., no
- * upstream defined, or ref does not exist).  Returns 0 if the commits are
- * identical.  Returns 1 if commits are different.
+ * Returns -1 if num_ours and num_theirs could not be filled in (e.g., ref
+ * does not exist).  Returns 0 if the commits are identical.  Returns 1 if
+ * commits are different.
  */
-int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
-                      const char **upstream_name, enum ahead_behind_flags abf)
+
+static int stat_branch_pair(const char *branch_name, const char *base,
+                            int *num_ours, int *num_theirs,
+                            enum ahead_behind_flags abf)
 {
        struct object_id oid;
        struct commit *ours, *theirs;
        struct rev_info revs;
-       const char *base;
        struct argv_array argv = ARGV_ARRAY_INIT;
 
-       /* Cannot stat unless we are marked to build on top of somebody else. */
-       base = branch_get_upstream(branch, NULL);
-       if (upstream_name)
-               *upstream_name = base;
-       if (!base)
-               return -1;
-
        /* Cannot stat if what we used to build on no longer exists */
        if (read_ref(base, &oid))
                return -1;
@@ -1863,7 +1908,7 @@ int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
        if (!theirs)
                return -1;
 
-       if (read_ref(branch->refname, &oid))
+       if (read_ref(branch_name, &oid))
                return -1;
        ours = lookup_commit_reference(the_repository, &oid);
        if (!ours)
@@ -1877,7 +1922,7 @@ int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
        if (abf == AHEAD_BEHIND_QUICK)
                return 1;
        if (abf != AHEAD_BEHIND_FULL)
-               BUG("stat_tracking_info: invalid abf '%d'", abf);
+               BUG("stat_branch_pair: invalid abf '%d'", abf);
 
        /* Run "rev-list --left-right ours...theirs" internally... */
        argv_array_push(&argv, ""); /* ignored */
@@ -1911,6 +1956,42 @@ int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
        return 1;
 }
 
+/*
+ * Lookup the tracking branch for the given branch and if present, optionally
+ * compute the commit ahead/behind values for the pair.
+ *
+ * If for_push is true, the tracking branch refers to the push branch,
+ * otherwise it refers to the upstream branch.
+ *
+ * The name of the tracking branch (or NULL if it is not defined) is
+ * returned via *tracking_name, if it is not itself NULL.
+ *
+ * If abf is AHEAD_BEHIND_FULL, compute the full ahead/behind and return the
+ * counts in *num_ours and *num_theirs.  If abf is AHEAD_BEHIND_QUICK, skip
+ * the (potentially expensive) a/b computation (*num_ours and *num_theirs are
+ * set to zero).
+ *
+ * Returns -1 if num_ours and num_theirs could not be filled in (e.g., no
+ * upstream defined, or ref does not exist).  Returns 0 if the commits are
+ * identical.  Returns 1 if commits are different.
+ */
+int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
+                      const char **tracking_name, int for_push,
+                      enum ahead_behind_flags abf)
+{
+       const char *base;
+
+       /* Cannot stat unless we are marked to build on top of somebody else. */
+       base = for_push ? branch_get_push(branch, NULL) :
+               branch_get_upstream(branch, NULL);
+       if (tracking_name)
+               *tracking_name = base;
+       if (!base)
+               return -1;
+
+       return stat_branch_pair(branch->refname, base, num_ours, num_theirs, abf);
+}
+
 /*
  * Return true when there is anything to report, otherwise false.
  */
@@ -1922,7 +2003,7 @@ int format_tracking_info(struct branch *branch, struct strbuf *sb,
        char *base;
        int upstream_is_gone = 0;
 
-       sti = stat_tracking_info(branch, &ours, &theirs, &full_base, abf);
+       sti = stat_tracking_info(branch, &ours, &theirs, &full_base, 0, abf);
        if (sti < 0) {
                if (!full_base)
                        return 0;