Make rev-list flush the stdio buffers after each rev.
[gitweb.git] / rev-list.c
index 16920ef69e844697628ca3775403f86cc1c13945..17995c34c4eae779caa36e525e9ffb72e22d87f3 100644 (file)
@@ -1,5 +1,8 @@
 #include "cache.h"
+#include "tag.h"
 #include "commit.h"
+#include "tree.h"
+#include "blob.h"
 #include "epoch.h"
 
 #define SEEN           (1u << 0)
@@ -12,11 +15,18 @@ static const char rev_list_usage[] =
                      "  --max-count=nr\n"
                      "  --max-age=epoch\n"
                      "  --min-age=epoch\n"
+                     "  --bisect\n"
+                     "  --objects\n"
+                     "  --unpacked\n"
                      "  --header\n"
                      "  --pretty\n"
                      "  --merge-order [ --show-breaks ]";
 
+static int unpacked = 0;
 static int bisect_list = 0;
+static int tag_objects = 0;
+static int tree_objects = 0;
+static int blob_objects = 0;
 static int verbose_header = 0;
 static int show_parents = 0;
 static int hdr_termination = 0;
@@ -53,7 +63,8 @@ static void show_commit(struct commit *commit)
                static char pretty_header[16384];
                pretty_print_commit(commit_format, commit->buffer, ~0, pretty_header, sizeof(pretty_header));
                printf("%s%c", pretty_header, hdr_termination);
-       }       
+       }
+       fflush(stdout);
 }
 
 static int filter_commit(struct commit * commit)
@@ -94,20 +105,125 @@ static int process_commit(struct commit * commit)
        return CONTINUE;
 }
 
+static struct object_list **add_object(struct object *obj, struct object_list **p, const char *name)
+{
+       struct object_list *entry = xmalloc(sizeof(*entry));
+       entry->item = obj;
+       entry->next = *p;
+       entry->name = name;
+       *p = entry;
+       return &entry->next;
+}
+
+static struct object_list **process_blob(struct blob *blob, struct object_list **p, const char *name)
+{
+       struct object *obj = &blob->object;
+
+       if (!blob_objects)
+               return p;
+       if (obj->flags & (UNINTERESTING | SEEN))
+               return p;
+       obj->flags |= SEEN;
+       return add_object(obj, p, name);
+}
+
+static struct object_list **process_tree(struct tree *tree, struct object_list **p, const char *name)
+{
+       struct object *obj = &tree->object;
+       struct tree_entry_list *entry;
+
+       if (!tree_objects)
+               return p;
+       if (obj->flags & (UNINTERESTING | SEEN))
+               return p;
+       if (parse_tree(tree) < 0)
+               die("bad tree object %s", sha1_to_hex(obj->sha1));
+       obj->flags |= SEEN;
+       p = add_object(obj, p, name);
+       for (entry = tree->entries ; entry ; entry = entry->next) {
+               if (entry->directory)
+                       p = process_tree(entry->item.tree, p, entry->name);
+               else
+                       p = process_blob(entry->item.blob, p, entry->name);
+       }
+       return p;
+}
+
+static struct object_list *pending_objects = NULL;
+
 static void show_commit_list(struct commit_list *list)
 {
+       struct object_list *objects = NULL, **p = &objects, *pending;
        while (list) {
                struct commit *commit = pop_most_recent_commit(&list, SEEN);
 
+               p = process_tree(commit->tree, p, "");
                if (process_commit(commit) == STOP)
                        break;
        }
+       for (pending = pending_objects; pending; pending = pending->next) {
+               struct object *obj = pending->item;
+               const char *name = pending->name;
+               if (obj->flags & (UNINTERESTING | SEEN))
+                       continue;
+               if (obj->type == tag_type) {
+                       obj->flags |= SEEN;
+                       p = add_object(obj, p, name);
+                       continue;
+               }
+               if (obj->type == tree_type) {
+                       p = process_tree((struct tree *)obj, p, name);
+                       continue;
+               }
+               if (obj->type == blob_type) {
+                       p = process_blob((struct blob *)obj, p, name);
+                       continue;
+               }
+               die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
+       }
+       while (objects) {
+               printf("%s %s\n", sha1_to_hex(objects->item->sha1), objects->name);
+               objects = objects->next;
+       }
+}
+
+static void mark_blob_uninteresting(struct blob *blob)
+{
+       if (!blob_objects)
+               return;
+       if (blob->object.flags & UNINTERESTING)
+               return;
+       blob->object.flags |= UNINTERESTING;
+}
+
+static void mark_tree_uninteresting(struct tree *tree)
+{
+       struct object *obj = &tree->object;
+       struct tree_entry_list *entry;
+
+       if (!tree_objects)
+               return;
+       if (obj->flags & UNINTERESTING)
+               return;
+       obj->flags |= UNINTERESTING;
+       if (parse_tree(tree) < 0)
+               die("bad tree %s", sha1_to_hex(obj->sha1));
+       entry = tree->entries;
+       while (entry) {
+               if (entry->directory)
+                       mark_tree_uninteresting(entry->item.tree);
+               else
+                       mark_blob_uninteresting(entry->item.blob);
+               entry = entry->next;
+       }
 }
 
 static void mark_parents_uninteresting(struct commit *commit)
 {
        struct commit_list *parents = commit->parents;
 
+       if (tree_objects)
+               mark_tree_uninteresting(commit->tree);
        while (parents) {
                struct commit *commit = parents->item;
                commit->object.flags |= UNINTERESTING;
@@ -199,14 +315,16 @@ static struct commit_list *find_bisection(struct commit_list *list)
        return best;
 }
 
-struct commit_list *limit_list(struct commit_list *list)
+static struct commit_list *limit_list(struct commit_list *list)
 {
        struct commit_list *newlist = NULL;
        struct commit_list **p = &newlist;
-       do {
+       while (list) {
                struct commit *commit = pop_most_recent_commit(&list, SEEN);
                struct object *obj = &commit->object;
 
+               if (unpacked && has_sha1_pack(obj->sha1))
+                       obj->flags |= UNINTERESTING;
                if (obj->flags & UNINTERESTING) {
                        mark_parents_uninteresting(commit);
                        if (everybody_uninteresting(list))
@@ -214,25 +332,83 @@ struct commit_list *limit_list(struct commit_list *list)
                        continue;
                }
                p = &commit_list_insert(commit, p)->next;
-       } while (list);
+       }
        if (bisect_list)
                newlist = find_bisection(newlist);
        return newlist;
 }
 
-static enum cmit_fmt get_commit_format(const char *arg)
+static void add_pending_object(struct object *obj, const char *name)
+{
+       add_object(obj, &pending_objects, name);
+}
+
+static struct commit *get_commit_reference(const char *name, unsigned int flags)
 {
-       if (!*arg)
-               return CMIT_FMT_DEFAULT;
-       if (!strcmp(arg, "=raw"))
-               return CMIT_FMT_RAW;
-       if (!strcmp(arg, "=medium"))
-               return CMIT_FMT_MEDIUM;
-       if (!strcmp(arg, "=short"))
-               return CMIT_FMT_SHORT;
-       usage(rev_list_usage);  
-}                      
+       unsigned char sha1[20];
+       struct object *object;
+
+       if (get_sha1(name, sha1))
+               usage(rev_list_usage);
+       object = parse_object(sha1);
+       if (!object)
+               die("bad object %s", name);
+
+       /*
+        * Tag object? Look what it points to..
+        */
+       if (object->type == tag_type) {
+               struct tag *tag = (struct tag *) object;
+               object->flags |= flags;
+               if (tag_objects && !(object->flags & UNINTERESTING))
+                       add_pending_object(object, tag->tag);
+               object = tag->tagged;
+       }
+
+       /*
+        * Commit object? Just return it, we'll do all the complex
+        * reachability crud.
+        */
+       if (object->type == commit_type) {
+               struct commit *commit = (struct commit *)object;
+               object->flags |= flags;
+               if (parse_commit(commit) < 0)
+                       die("unable to parse commit %s", name);
+               return commit;
+       }
+
+       /*
+        * Tree object? Either mark it uniniteresting, or add it
+        * to the list of objects to look at later..
+        */
+       if (object->type == tree_type) {
+               struct tree *tree = (struct tree *)object;
+               if (!tree_objects)
+                       return NULL;
+               if (flags & UNINTERESTING) {
+                       mark_tree_uninteresting(tree);
+                       return NULL;
+               }
+               add_pending_object(object, "");
+               return NULL;
+       }
 
+       /*
+        * Blob object? You know the drill by now..
+        */
+       if (object->type == blob_type) {
+               struct blob *blob = (struct blob *)object;
+               if (!blob_objects)
+                       return NULL;
+               if (flags & UNINTERESTING) {
+                       mark_blob_uninteresting(blob);
+                       return NULL;
+               }
+               add_pending_object(object, "");
+               return NULL;
+       }
+       die("%s is unknown object", name);
+}
 
 int main(int argc, char **argv)
 {
@@ -242,7 +418,6 @@ int main(int argc, char **argv)
        for (i = 1 ; i < argc; i++) {
                int flags;
                char *arg = argv[i];
-               unsigned char sha1[20];
                struct commit *commit;
 
                if (!strncmp(arg, "--max-count=", 12)) {
@@ -276,6 +451,17 @@ int main(int argc, char **argv)
                        bisect_list = 1;
                        continue;
                }
+               if (!strcmp(arg, "--objects")) {
+                       tag_objects = 1;
+                       tree_objects = 1;
+                       blob_objects = 1;
+                       continue;
+               }
+               if (!strcmp(arg, "--unpacked")) {
+                       unpacked = 1;
+                       limited = 1;
+                       continue;
+               }
                if (!strncmp(arg, "--merge-order", 13)) {
                        merge_order = 1;
                        continue;
@@ -291,18 +477,14 @@ int main(int argc, char **argv)
                        arg++;
                        limited = 1;
                }
-               if (get_sha1(arg, sha1) || (show_breaks && !merge_order))
+               if (show_breaks && !merge_order)
                        usage(rev_list_usage);
-               commit = lookup_commit_reference(sha1);
-               if (!commit || parse_commit(commit) < 0)
-                       die("bad commit object %s", arg);
-               commit->object.flags |= flags;
+               commit = get_commit_reference(arg, flags);
+               if (!commit)
+                       continue;
                commit_list_insert(commit, &list);
        }
 
-       if (!list)
-               usage(rev_list_usage);
-
        if (!merge_order) {             
                if (limited)
                        list = limit_list(list);