git-svn: add the commit-diff command
[gitweb.git] / sha1_name.c
index dc6835520ccfd4838b47a4af81ccf139f55e1801..f2cbafa496231e7a9cdbbea2ab4e7d4c4ed761ab 100644 (file)
@@ -4,6 +4,7 @@
 #include "tree.h"
 #include "blob.h"
 #include "tree-walk.h"
+#include "refs.h"
 
 static int find_short_object_filename(int len, const char *name, unsigned char *sha1)
 {
@@ -245,36 +246,60 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
                "refs/remotes/%.*s/HEAD",
                NULL
        };
-       const char **p;
-       const char *warning = "warning: refname '%.*s' is ambiguous.\n";
-       char *pathname;
-       int already_found = 0;
+       static const char *warning = "warning: refname '%.*s' is ambiguous.\n";
+       const char **p, *pathname;
+       char *real_path = NULL;
+       int refs_found = 0, am;
+       unsigned long at_time = (unsigned long)-1;
        unsigned char *this_result;
        unsigned char sha1_from_ref[20];
 
        if (len == 40 && !get_sha1_hex(str, sha1))
                return 0;
 
+       /* At a given period of time? "@{2 hours ago}" */
+       for (am = 1; am < len - 1; am++) {
+               if (str[am] == '@' && str[am+1] == '{' && str[len-1] == '}') {
+                       int date_len = len - am - 3;
+                       char *date_spec = xmalloc(date_len + 1);
+                       strlcpy(date_spec, str + am + 2, date_len + 1);
+                       at_time = approxidate(date_spec);
+                       free(date_spec);
+                       len = am;
+                       break;
+               }
+       }
+
        /* Accept only unambiguous ref paths. */
        if (ambiguous_path(str, len))
                return -1;
 
        for (p = fmt; *p; p++) {
-               this_result = already_found ? sha1_from_ref : sha1;
-               pathname = git_path(*p, len, str);
-               if (!read_ref(pathname, this_result)) {
-                       if (warn_ambiguous_refs) {
-                               if (already_found)
-                                       fprintf(stderr, warning, len, str);
-                               already_found++;
-                       }
-                       else
-                               return 0;
+               this_result = refs_found ? sha1_from_ref : sha1;
+               pathname = resolve_ref(git_path(*p, len, str), this_result, 1);
+               if (pathname) {
+                       if (!refs_found++)
+                               real_path = strdup(pathname);
+                       if (!warn_ambiguous_refs)
+                               break;
                }
        }
-       if (already_found)
-               return 0;
-       return -1;
+
+       if (!refs_found)
+               return -1;
+
+       if (warn_ambiguous_refs && refs_found > 1)
+               fprintf(stderr, warning, len, str);
+
+       if (at_time != (unsigned long)-1) {
+               read_ref_at(
+                       real_path + strlen(git_path(".")) - 1,
+                       at_time,
+                       sha1);
+       }
+
+       free(real_path);
+       return 0;
 }
 
 static int get_sha1_1(const char *name, int len, unsigned char *sha1);
@@ -332,7 +357,7 @@ static int peel_onion(const char *name, int len, unsigned char *sha1)
 {
        unsigned char outer[20];
        const char *sp;
-       const char *type_string = NULL;
+       unsigned int expected_type = 0;
        struct object *o;
 
        /*
@@ -356,13 +381,13 @@ static int peel_onion(const char *name, int len, unsigned char *sha1)
 
        sp++; /* beginning of type name, or closing brace for empty */
        if (!strncmp(commit_type, sp, 6) && sp[6] == '}')
-               type_string = commit_type;
+               expected_type = TYPE_COMMIT;
        else if (!strncmp(tree_type, sp, 4) && sp[4] == '}')
-               type_string = tree_type;
+               expected_type = TYPE_TREE;
        else if (!strncmp(blob_type, sp, 4) && sp[4] == '}')
-               type_string = blob_type;
+               expected_type = TYPE_BLOB;
        else if (sp[0] == '}')
-               type_string = NULL;
+               expected_type = TYPE_NONE;
        else
                return -1;
 
@@ -372,7 +397,7 @@ static int peel_onion(const char *name, int len, unsigned char *sha1)
        o = parse_object(outer);
        if (!o)
                return -1;
-       if (!type_string) {
+       if (!expected_type) {
                o = deref_tag(o, name, sp - name - 2);
                if (!o || (!o->parsed && !parse_object(o->sha1)))
                        return -1;
@@ -387,18 +412,18 @@ static int peel_onion(const char *name, int len, unsigned char *sha1)
                while (1) {
                        if (!o || (!o->parsed && !parse_object(o->sha1)))
                                return -1;
-                       if (o->type == type_string) {
+                       if (o->type == expected_type) {
                                memcpy(sha1, o->sha1, 20);
                                return 0;
                        }
-                       if (o->type == tag_type)
+                       if (o->type == TYPE_TAG)
                                o = ((struct tag*) o)->tagged;
-                       else if (o->type == commit_type)
+                       else if (o->type == TYPE_COMMIT)
                                o = &(((struct commit *) o)->tree->object);
                        else
                                return error("%.*s: expected %s type, but the object dereferences to %s type",
-                                            len, name, type_string,
-                                            o->type);
+                                            len, name, typename(expected_type),
+                                            typename(o->type));
                        if (!o->parsed)
                                parse_object(o->sha1);
                }
@@ -456,7 +481,7 @@ static int get_sha1_1(const char *name, int len, unsigned char *sha1)
  */
 int get_sha1(const char *name, unsigned char *sha1)
 {
-       int ret;
+       int ret, bracket_depth;
        unsigned unused;
        int namelen = strlen(name);
        const char *cp;
@@ -502,8 +527,15 @@ int get_sha1(const char *name, unsigned char *sha1)
                }
                return -1;
        }
-       cp = strchr(name, ':');
-       if (cp) {
+       for (cp = name, bracket_depth = 0; *cp; cp++) {
+               if (*cp == '{')
+                       bracket_depth++;
+               else if (bracket_depth && *cp == '}')
+                       bracket_depth--;
+               else if (!bracket_depth && *cp == ':')
+                       break;
+       }
+       if (*cp == ':') {
                unsigned char tree_sha1[20];
                if (!get_sha1_1(name, cp-name, tree_sha1))
                        return get_tree_entry(tree_sha1, cp+1, sha1,