[PATCH] Update git-tag-script to create the .git/refs/tags if it does not already...

[git.git] / rev-tree.c

diff --git a/rev-tree.c b/rev-tree.c
index 57fb47e..7f92819 100644 (file)
--- a/rev-tree.c
+++ b/rev-tree.c
@@ -1,10 +1,5 @@
-#define _XOPEN_SOURCE /* glibc2 needs this */
-#define _BSD_SOURCE /* for tm.tm_gmtoff */
-#include <time.h>
-#include <ctype.h>
-
 #include "cache.h"
-#include "revision.h"
+#include "commit.h"
 
 /*
  * revision.h leaves the low 16 bits of the "flags" field of the
@@ -12,59 +7,16 @@
  * this commit <N>" bitmask.
  */
 #define MAX_COMMITS 16
+#define REACHABLE (1U << 16)
+
+#define cmit_flags(cmit) ((cmit)->object.flags & ~REACHABLE)
 
 static int show_edges = 0;
 static int basemask = 0;
 
 static void read_cache_file(const char *path)
 {
-       FILE *file = fopen(path, "r");
-       char line[500];
-
-       if (!file)
-               die("bad revtree cache file (%s)", path);
-
-       while (fgets(line, sizeof(line), file)) {
-               unsigned long date;
-               unsigned char sha1[20];
-               struct revision *rev;
-               const char *buf;
-
-               if (sscanf(line, "%lu", &date) != 1)
-                       break;
-               buf = strchr(line, ' ');
-               if (!buf)
-                       break;
-               if (get_sha1_hex(buf+1, sha1))
-                       break;
-               rev = lookup_rev(sha1);
-               rev->flags |= SEEN;
-               rev->date = date;
-
-               /* parents? */
-               while ((buf = strchr(buf+1, ' ')) != NULL) {
-                       unsigned char parent[20];
-                       if (get_sha1_hex(buf + 1, parent))
-                               break;
-                       add_relationship(rev, parent);
-               }
-       }
-       fclose(file);
-}
-
-static void mark_sha1_path(struct revision *rev, unsigned int mask)
-{
-       struct parent *p;
-
-       if (rev->flags & mask)
-               return;
-
-       rev->flags |= mask;
-       p = rev->parent;
-       while (p) {
-               mark_sha1_path(p->parent, mask);
-               p = p->next;
-       }
+       die("no revtree cache file yet");
 }
 
 /*
@@ -76,16 +28,16 @@ static void mark_sha1_path(struct revision *rev, unsigned int mask)
  * And sometimes we're only interested in "edge" commits, ie
  * places where the marking changes between parent and child.
  */
-static int interesting(struct revision *rev)
+static int interesting(struct commit *rev)
 {
-       unsigned mask = marked(rev);
+       unsigned mask = cmit_flags(rev);
 
        if (!mask)
                return 0;
        if (show_edges) {
-               struct parent *p = rev->parent;
+               struct commit_list *p = rev->parents;
                while (p) {
-                       if (mask != marked(p->parent))
+                       if (mask != cmit_flags(p->item))
                                return 1;
                        p = p->next;
                }
@@ -98,7 +50,7 @@ static int interesting(struct revision *rev)
 }
 
 /*
- * Usage: rev-tree [--edges] [--cache <cache-file>] <commit-id> [<commit-id2>]
+ * Usage: git-rev-tree [--edges] [--cache <cache-file>] <commit-id> [<commit-id2>]
  *
  * The cache-file can be quite important for big trees. This is an
  * expensive operation if you have to walk the whole chain of
@@ -109,6 +61,7 @@ int main(int argc, char **argv)
        int i;
        int nr = 0;
        unsigned char sha1[MAX_COMMITS][20];
+       struct commit_list *list = NULL;
 
        /*
         * First - pick up all the revisions we can (both from
@@ -116,10 +69,10 @@ int main(int argc, char **argv)
         */
        for (i = 1; i < argc ; i++) {
                char *arg = argv[i];
+               struct commit *commit;
 
                if (!strcmp(arg, "--cache")) {
-                       read_cache_file(argv[2]);
-                       i++;
+                       read_cache_file(argv[++i]);
                        continue;
                }
 
@@ -132,32 +85,53 @@ int main(int argc, char **argv)
                        arg++;
                        basemask |= 1<<nr;
                }
-               if (nr >= MAX_COMMITS || get_sha1_hex(arg, sha1[nr]))
-                       usage("rev-tree [--edges] [--cache <cache-file>] <commit-id> [<commit-id>]");
-               parse_commit(sha1[nr]);
+               if (nr >= MAX_COMMITS || get_sha1(arg, sha1[nr]))
+                       usage("git-rev-tree [--edges] [--cache <cache-file>] <commit-id> [<commit-id>]");
+
+               commit = lookup_commit_reference(sha1[nr]);
+               if (!commit || parse_commit(commit) < 0)
+                       die("bad commit object");
+               commit_list_insert(commit, &list);
                nr++;
        }
 
        /*
+        * Parse all the commits in date order.
+        *
+        * We really should stop once we know enough, but that's a
+        * decision that isn't trivial to make.
+        */
+       while (list)
+               pop_most_recent_commit(&list, REACHABLE);
+
+       /*
         * Now we have the maximal tree. Walk the different sha files back to the root.
         */
        for (i = 0; i < nr; i++)
-               mark_sha1_path(lookup_rev(sha1[i]), 1 << i);
+               mark_reachable(&lookup_commit_reference(sha1[i])->object, 1 << i);
 
        /*
         * Now print out the results..
         */
-       for (i = 0; i < nr_revs; i++) {
-               struct revision *rev = revs[i];
-               struct parent *p;
+       for (i = 0; i < nr_objs; i++) {
+               struct object *obj = objs[i];
+               struct commit *commit;
+               struct commit_list *p;
+
+               if (obj->type != commit_type)
+                       continue;
+
+               commit = (struct commit *) obj;
 
-               if (!interesting(rev))
+               if (!interesting(commit))
                        continue;
 
-               printf("%lu %s:%d", rev->date, sha1_to_hex(rev->sha1), marked(rev));
-               p = rev->parent;
+               printf("%lu %s:%d", commit->date, sha1_to_hex(obj->sha1),
+                                   cmit_flags(commit));
+               p = commit->parents;
                while (p) {
-                       printf(" %s:%d", sha1_to_hex(p->parent->sha1), marked(p->parent));
+                       printf(" %s:%d", sha1_to_hex(p->item->object.sha1), 
+                              cmit_flags(p->item));
                        p = p->next;
                }
                printf("\n");