include agent identifier in capability string
[gitweb.git] / sha1_name.c
index aefae1f524d2bd185702ec0314860c1c136a68a7..c6331136d19c5224078fa78b6e5e794fcc587fe2 100644 (file)
@@ -7,6 +7,8 @@
 #include "refs.h"
 #include "remote.h"
 
+static int get_sha1_oneline(const char *, unsigned char *, struct commit_list *);
+
 static int find_short_object_filename(int len, const char *name, unsigned char *sha1)
 {
        struct alternate_object_database *alt;
@@ -206,9 +208,7 @@ const char *find_unique_abbrev(const unsigned char *sha1, int len)
                if (exists
                    ? !status
                    : status == SHORT_NAME_NOT_FOUND) {
-                       int cut_at = len + unique_abbrev_extra_length;
-                       cut_at = (cut_at < 40) ? cut_at : 40;
-                       hex[cut_at] = 0;
+                       hex[len] = 0;
                        return hex;
                }
                len++;
@@ -241,91 +241,6 @@ static int ambiguous_path(const char *path, int len)
        return slash;
 }
 
-/*
- * *string and *len will only be substituted, and *string returned (for
- * later free()ing) if the string passed in is a magic short-hand form
- * to name a branch.
- */
-static char *substitute_branch_name(const char **string, int *len)
-{
-       struct strbuf buf = STRBUF_INIT;
-       int ret = interpret_branch_name(*string, &buf);
-
-       if (ret == *len) {
-               size_t size;
-               *string = strbuf_detach(&buf, &size);
-               *len = size;
-               return (char *)*string;
-       }
-
-       return NULL;
-}
-
-int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref)
-{
-       char *last_branch = substitute_branch_name(&str, &len);
-       const char **p, *r;
-       int refs_found = 0;
-
-       *ref = NULL;
-       for (p = ref_rev_parse_rules; *p; p++) {
-               char fullref[PATH_MAX];
-               unsigned char sha1_from_ref[20];
-               unsigned char *this_result;
-               int flag;
-
-               this_result = refs_found ? sha1_from_ref : sha1;
-               mksnpath(fullref, sizeof(fullref), *p, len, str);
-               r = resolve_ref(fullref, this_result, 1, &flag);
-               if (r) {
-                       if (!refs_found++)
-                               *ref = xstrdup(r);
-                       if (!warn_ambiguous_refs)
-                               break;
-               } else if ((flag & REF_ISSYMREF) && strcmp(fullref, "HEAD"))
-                       warning("ignoring dangling symref %s.", fullref);
-       }
-       free(last_branch);
-       return refs_found;
-}
-
-int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
-{
-       char *last_branch = substitute_branch_name(&str, &len);
-       const char **p;
-       int logs_found = 0;
-
-       *log = NULL;
-       for (p = ref_rev_parse_rules; *p; p++) {
-               struct stat st;
-               unsigned char hash[20];
-               char path[PATH_MAX];
-               const char *ref, *it;
-
-               mksnpath(path, sizeof(path), *p, len, str);
-               ref = resolve_ref(path, hash, 1, NULL);
-               if (!ref)
-                       continue;
-               if (!stat(git_path("logs/%s", path), &st) &&
-                   S_ISREG(st.st_mode))
-                       it = path;
-               else if (strcmp(ref, path) &&
-                        !stat(git_path("logs/%s", ref), &st) &&
-                        S_ISREG(st.st_mode))
-                       it = ref;
-               else
-                       continue;
-               if (!logs_found++) {
-                       *log = xstrdup(it);
-                       hashcpy(sha1, hash);
-               }
-               if (!warn_ambiguous_refs)
-                       break;
-       }
-       free(last_branch);
-       return logs_found;
-}
-
 static inline int upstream_mark(const char *string, int len)
 {
        const char *suffix[] = { "@{upstream}", "@{u}" };
@@ -501,12 +416,6 @@ struct object *peel_to_type(const char *name, int namelen,
 {
        if (name && !namelen)
                namelen = strlen(name);
-       if (!o) {
-               unsigned char sha1[20];
-               if (get_sha1_1(name, namelen, sha1))
-                       return NULL;
-               o = parse_object(sha1);
-       }
        while (1) {
                if (!o || (!o->parsed && !parse_object(o->sha1)))
                        return NULL;
@@ -562,6 +471,8 @@ static int peel_onion(const char *name, int len, unsigned char *sha1)
                expected_type = OBJ_BLOB;
        else if (sp[0] == '}')
                expected_type = OBJ_NONE;
+       else if (sp[0] == '/')
+               expected_type = OBJ_COMMIT;
        else
                return -1;
 
@@ -576,19 +487,37 @@ static int peel_onion(const char *name, int len, unsigned char *sha1)
                if (!o || (!o->parsed && !parse_object(o->sha1)))
                        return -1;
                hashcpy(sha1, o->sha1);
+               return 0;
        }
-       else {
+
+       /*
+        * At this point, the syntax look correct, so
+        * if we do not get the needed object, we should
+        * barf.
+        */
+       o = peel_to_type(name, len, o, expected_type);
+       if (!o)
+               return -1;
+
+       hashcpy(sha1, o->sha1);
+       if (sp[0] == '/') {
+               /* "$commit^{/foo}" */
+               char *prefix;
+               int ret;
+               struct commit_list *list = NULL;
+
                /*
-                * At this point, the syntax look correct, so
-                * if we do not get the needed object, we should
-                * barf.
+                * $commit^{/}. Some regex implementation may reject.
+                * We don't need regex anyway. '' pattern always matches.
                 */
-               o = peel_to_type(name, len, o, expected_type);
-               if (o) {
-                       hashcpy(sha1, o->sha1);
+               if (sp[1] == '}')
                        return 0;
-               }
-               return -1;
+
+               prefix = xstrndup(sp + 1, name + len - 1 - (sp + 1));
+               commit_list_insert((struct commit *)o, &list);
+               ret = get_sha1_oneline(prefix, sha1, list);
+               free(prefix);
+               return ret;
        }
        return 0;
 }
@@ -685,7 +614,7 @@ static int handle_one_ref(const char *path,
        }
        if (object->type != OBJ_COMMIT)
                return 0;
-       insert_by_date((struct commit *)object, list);
+       commit_list_insert_by_date((struct commit *)object, list);
        return 0;
 }
 
@@ -927,10 +856,22 @@ int interpret_branch_name(const char *name, struct strbuf *buf)
        len = cp + tmp_len - name;
        cp = xstrndup(name, cp - name);
        upstream = branch_get(*cp ? cp : NULL);
-       if (!upstream
-           || !upstream->merge
-           || !upstream->merge[0]->dst)
-               return error("No upstream branch found for '%s'", cp);
+       /*
+        * Upstream can be NULL only if cp refers to HEAD and HEAD
+        * points to something different than a branch.
+        */
+       if (!upstream)
+               return error(_("HEAD does not point to a branch"));
+       if (!upstream->merge || !upstream->merge[0]->dst) {
+               if (!ref_exists(upstream->refname))
+                       return error(_("No such branch: '%s'"), cp);
+               if (!upstream->merge)
+                       return error(_("No upstream configured for branch '%s'"),
+                                    upstream->name);
+               return error(
+                       _("Upstream branch '%s' not stored as a remote-tracking branch"),
+                       upstream->merge[0]->src);
+       }
        free(cp);
        cp = shorten_unambiguous_ref(upstream->merge[0]->dst, 0);
        strbuf_reset(buf);
@@ -952,9 +893,9 @@ int strbuf_check_branch_ref(struct strbuf *sb, const char *name)
 {
        strbuf_branchname(sb, name);
        if (name[0] == '-')
-               return CHECK_REF_FORMAT_ERROR;
+               return -1;
        strbuf_splice(sb, 0, 0, "refs/heads/", 11);
-       return check_ref_format(sb->buf);
+       return check_refname_format(sb->buf, 0);
 }
 
 /*
@@ -992,11 +933,13 @@ static void diagnose_invalid_sha1_path(const char *prefix,
                if (!get_tree_entry(tree_sha1, fullname,
                                    sha1, &mode)) {
                        die("Path '%s' exists, but not '%s'.\n"
-                           "Did you mean '%s:%s'?",
+                           "Did you mean '%s:%s' aka '%s:./%s'?",
                            fullname,
                            filename,
                            object_name,
-                           fullname);
+                           fullname,
+                           object_name,
+                           filename);
                }
                die("Path '%s' does not exist in '%s'",
                    filename, object_name);
@@ -1045,9 +988,10 @@ static void diagnose_invalid_index_path(int stage,
                if (ce_namelen(ce) == fullnamelen &&
                    !memcmp(ce->name, fullname, fullnamelen))
                        die("Path '%s' is in the index, but not '%s'.\n"
-                           "Did you mean ':%d:%s'?",
+                           "Did you mean ':%d:%s' aka ':%d:./%s'?",
                            fullname, filename,
-                           ce_stage(ce), fullname);
+                           ce_stage(ce), fullname,
+                           ce_stage(ce), filename);
        }
 
        if (!lstat(filename, &st))
@@ -1060,18 +1004,36 @@ static void diagnose_invalid_index_path(int stage,
 }
 
 
-int get_sha1_with_mode_1(const char *name, unsigned char *sha1, unsigned *mode, int gently, const char *prefix)
+int get_sha1_with_mode_1(const char *name, unsigned char *sha1, unsigned *mode,
+                        int only_to_die, const char *prefix)
 {
        struct object_context oc;
        int ret;
-       ret = get_sha1_with_context_1(name, sha1, &oc, gently, prefix);
+       ret = get_sha1_with_context_1(name, sha1, &oc, only_to_die, prefix);
        *mode = oc.mode;
        return ret;
 }
 
+static char *resolve_relative_path(const char *rel)
+{
+       if (prefixcmp(rel, "./") && prefixcmp(rel, "../"))
+               return NULL;
+
+       if (!startup_info)
+               die("BUG: startup_info struct is not initialized.");
+
+       if (!is_inside_work_tree())
+               die("relative path syntax can't be used outside working tree.");
+
+       /* die() inside prefix_path() if resolved path is outside worktree */
+       return prefix_path(startup_info->prefix,
+                          startup_info->prefix ? strlen(startup_info->prefix) : 0,
+                          rel);
+}
+
 int get_sha1_with_context_1(const char *name, unsigned char *sha1,
                            struct object_context *oc,
-                           int gently, const char *prefix)
+                           int only_to_die, const char *prefix)
 {
        int ret, bracket_depth;
        int namelen = strlen(name);
@@ -1083,15 +1045,17 @@ int get_sha1_with_context_1(const char *name, unsigned char *sha1,
        if (!ret)
                return ret;
        /* sha1:path --> object name of path in ent sha1
-        * :path -> object name of path in index
+        * :path -> object name of absolute path in index
+        * :./path -> object name of path relative to cwd in index
         * :[0-3]:path -> object name of path in index at stage
         * :/foo -> recent commit matching foo
         */
        if (name[0] == ':') {
                int stage = 0;
                struct cache_entry *ce;
+               char *new_path = NULL;
                int pos;
-               if (namelen > 2 && name[1] == '/') {
+               if (!only_to_die && namelen > 2 && name[1] == '/') {
                        struct commit_list *list = NULL;
                        for_each_ref(handle_one_ref, &list);
                        return get_sha1_oneline(name + 2, sha1, list);
@@ -1104,7 +1068,13 @@ int get_sha1_with_context_1(const char *name, unsigned char *sha1,
                        stage = name[1] - '0';
                        cp = name + 3;
                }
-               namelen = namelen - (cp - name);
+               new_path = resolve_relative_path(cp);
+               if (!new_path) {
+                       namelen = namelen - (cp - name);
+               } else {
+                       cp = new_path;
+                       namelen = strlen(cp);
+               }
 
                strncpy(oc->path, cp,
                        sizeof(oc->path));
@@ -1123,12 +1093,14 @@ int get_sha1_with_context_1(const char *name, unsigned char *sha1,
                        if (ce_stage(ce) == stage) {
                                hashcpy(sha1, ce->sha1);
                                oc->mode = ce->ce_mode;
+                               free(new_path);
                                return 0;
                        }
                        pos++;
                }
-               if (!gently)
+               if (only_to_die && name[1] && name[1] != '/')
                        diagnose_invalid_index_path(stage, prefix, cp);
+               free(new_path);
                return -1;
        }
        for (cp = name, bracket_depth = 0; *cp; cp++) {
@@ -1142,15 +1114,20 @@ int get_sha1_with_context_1(const char *name, unsigned char *sha1,
        if (*cp == ':') {
                unsigned char tree_sha1[20];
                char *object_name = NULL;
-               if (!gently) {
+               if (only_to_die) {
                        object_name = xmalloc(cp-name+1);
                        strncpy(object_name, name, cp-name);
                        object_name[cp-name] = '\0';
                }
                if (!get_sha1_1(name, cp-name, tree_sha1)) {
                        const char *filename = cp+1;
+                       char *new_filename = NULL;
+
+                       new_filename = resolve_relative_path(filename);
+                       if (new_filename)
+                               filename = new_filename;
                        ret = get_tree_entry(tree_sha1, filename, sha1, &oc->mode);
-                       if (!gently) {
+                       if (only_to_die) {
                                diagnose_invalid_sha1_path(prefix, filename,
                                                           tree_sha1, object_name);
                                free(object_name);
@@ -1160,9 +1137,10 @@ int get_sha1_with_context_1(const char *name, unsigned char *sha1,
                                sizeof(oc->path));
                        oc->path[sizeof(oc->path)-1] = '\0';
 
+                       free(new_filename);
                        return ret;
                } else {
-                       if (!gently)
+                       if (only_to_die)
                                die("Invalid object name '%s'.", object_name);
                }
        }