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reachable: use traverse_commit_list instead of custom walk

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To find the set of reachable objects, we add a bunch of
possible sources to our rev_info, call prepare_revision_walk,
and then launch into a custom walker that handles each
object top. This is a subset of what traverse_commit_list
does, so we can just reuse that code (it can also handle
more complex cases like UNINTERESTING commits and pathspecs,
but we don't use those features).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2014-10-15 18:37:28 -04:00 committed by Junio C Hamano
parent 1da1e07c83
commit 5f78a431ab
1 changed files with 17 additions and 113 deletions
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130
reachable.c
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@ -8,6 +8,7 @@
#include "reachable.h"
#include "cache-tree.h"
#include "progress.h"
#include "list-objects.h"
struct connectivity_progress {
struct progress *progress;
@ -21,118 +22,6 @@ static void update_progress(struct connectivity_progress *cp)
display_progress(cp->progress, cp->count);
}
static void process_blob(struct blob *blob,
struct object_array *p,
struct name_path *path,
const char *name,
struct connectivity_progress *cp)
{
struct object *obj = &blob->object;
if (!blob)
die("bad blob object");
if (obj->flags & SEEN)
return;
obj->flags |= SEEN;
update_progress(cp);
/* Nothing to do, really .. The blob lookup was the important part */
}
static void process_gitlink(const unsigned char *sha1,
struct object_array *p,
struct name_path *path,
const char *name)
{
/* I don't think we want to recurse into this, really. */
}
static void process_tree(struct tree *tree,
struct object_array *p,
struct name_path *path,
const char *name,
struct connectivity_progress *cp)
{
struct object *obj = &tree->object;
struct tree_desc desc;
struct name_entry entry;
struct name_path me;
if (!tree)
die("bad tree object");
if (obj->flags & SEEN)
return;
obj->flags |= SEEN;
update_progress(cp);
if (parse_tree(tree) < 0)
die("bad tree object %s", sha1_to_hex(obj->sha1));
add_object(obj, p, path, name);
me.up = path;
me.elem = name;
me.elem_len = strlen(name);
init_tree_desc(&desc, tree->buffer, tree->size);
while (tree_entry(&desc, &entry)) {
if (S_ISDIR(entry.mode))
process_tree(lookup_tree(entry.sha1), p, &me, entry.path, cp);
else if (S_ISGITLINK(entry.mode))
process_gitlink(entry.sha1, p, &me, entry.path);
else
process_blob(lookup_blob(entry.sha1), p, &me, entry.path, cp);
}
free_tree_buffer(tree);
}
static void process_tag(struct tag *tag, struct object_array *p,
const char *name, struct connectivity_progress *cp)
{
struct object *obj = &tag->object;
if (obj->flags & SEEN)
return;
obj->flags |= SEEN;
update_progress(cp);
if (parse_tag(tag) < 0)
die("bad tag object %s", sha1_to_hex(obj->sha1));
if (tag->tagged)
add_object(tag->tagged, p, NULL, name);
}
static void walk_commit_list(struct rev_info *revs,
struct connectivity_progress *cp)
{
int i;
struct commit *commit;
struct object_array objects = OBJECT_ARRAY_INIT;
/* Walk all commits, process their trees */
while ((commit = get_revision(revs)) != NULL) {
process_tree(commit->tree, &objects, NULL, "", cp);
update_progress(cp);
}
/* Then walk all the pending objects, recursively processing them too */
for (i = 0; i < revs->pending.nr; i++) {
struct object_array_entry *pending = revs->pending.objects + i;
struct object *obj = pending->item;
const char *name = pending->name;
if (obj->type == OBJ_TAG) {
process_tag((struct tag *) obj, &objects, name, cp);
continue;
}
if (obj->type == OBJ_TREE) {
process_tree((struct tree *)obj, &objects, NULL, name, cp);
continue;
}
if (obj->type == OBJ_BLOB) {
process_blob((struct blob *)obj, &objects, NULL, name, cp);
continue;
}
die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
}
}
static int add_one_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
const char *email, unsigned long timestamp, int tz,
const char *message, void *cb_data)
@ -210,6 +99,21 @@ static void add_cache_refs(struct rev_info *revs)
add_cache_tree(active_cache_tree, revs);
}
/*
* The traversal will have already marked us as SEEN, so we
* only need to handle any progress reporting here.
*/
static void mark_object(struct object *obj, const struct name_path *path,
const char *name, void *data)
{
update_progress(data);
}
static void mark_commit(struct commit *c, void *data)
{
mark_object(&c->object, NULL, NULL, data);
}
void mark_reachable_objects(struct rev_info *revs, int mark_reflog,
struct progress *progress)
{
@ -245,6 +149,6 @@ void mark_reachable_objects(struct rev_info *revs, int mark_reflog,
*/
if (prepare_revision_walk(revs))
die("revision walk setup failed");
walk_commit_list(revs, &cp);
traverse_commit_list(revs, mark_commit, mark_object, &cp);
display_progress(cp.progress, cp.count);
}