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https://github.com/git/git
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![Johannes Schindelin](/assets/img/avatar_default.png)
Noticed by gcc 4.6.0. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
222 lines
5.5 KiB
C
222 lines
5.5 KiB
C
#include "cache.h"
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#include "refs.h"
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#include "tag.h"
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#include "commit.h"
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#include "blob.h"
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#include "diff.h"
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#include "revision.h"
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#include "reachable.h"
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#include "cache-tree.h"
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static void process_blob(struct blob *blob,
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struct object_array *p,
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struct name_path *path,
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const char *name)
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{
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struct object *obj = &blob->object;
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if (!blob)
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die("bad blob object");
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if (obj->flags & SEEN)
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return;
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obj->flags |= SEEN;
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/* Nothing to do, really .. The blob lookup was the important part */
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}
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static void process_gitlink(const unsigned char *sha1,
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struct object_array *p,
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struct name_path *path,
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const char *name)
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{
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/* I don't think we want to recurse into this, really. */
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}
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static void process_tree(struct tree *tree,
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struct object_array *p,
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struct name_path *path,
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const char *name)
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{
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struct object *obj = &tree->object;
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struct tree_desc desc;
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struct name_entry entry;
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struct name_path me;
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if (!tree)
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die("bad tree object");
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if (obj->flags & SEEN)
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return;
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obj->flags |= SEEN;
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if (parse_tree(tree) < 0)
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die("bad tree object %s", sha1_to_hex(obj->sha1));
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add_object(obj, p, path, name);
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me.up = path;
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me.elem = name;
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me.elem_len = strlen(name);
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init_tree_desc(&desc, tree->buffer, tree->size);
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while (tree_entry(&desc, &entry)) {
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if (S_ISDIR(entry.mode))
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process_tree(lookup_tree(entry.sha1), p, &me, entry.path);
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else if (S_ISGITLINK(entry.mode))
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process_gitlink(entry.sha1, p, &me, entry.path);
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else
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process_blob(lookup_blob(entry.sha1), p, &me, entry.path);
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}
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free(tree->buffer);
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tree->buffer = NULL;
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}
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static void process_tag(struct tag *tag, struct object_array *p, const char *name)
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{
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struct object *obj = &tag->object;
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if (obj->flags & SEEN)
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return;
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obj->flags |= SEEN;
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if (parse_tag(tag) < 0)
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die("bad tag object %s", sha1_to_hex(obj->sha1));
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if (tag->tagged)
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add_object(tag->tagged, p, NULL, name);
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}
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static void walk_commit_list(struct rev_info *revs)
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{
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int i;
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struct commit *commit;
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struct object_array objects = OBJECT_ARRAY_INIT;
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/* Walk all commits, process their trees */
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while ((commit = get_revision(revs)) != NULL)
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process_tree(commit->tree, &objects, NULL, "");
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/* Then walk all the pending objects, recursively processing them too */
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for (i = 0; i < revs->pending.nr; i++) {
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struct object_array_entry *pending = revs->pending.objects + i;
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struct object *obj = pending->item;
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const char *name = pending->name;
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if (obj->type == OBJ_TAG) {
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process_tag((struct tag *) obj, &objects, name);
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continue;
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}
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if (obj->type == OBJ_TREE) {
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process_tree((struct tree *)obj, &objects, NULL, name);
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continue;
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}
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if (obj->type == OBJ_BLOB) {
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process_blob((struct blob *)obj, &objects, NULL, name);
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continue;
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}
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die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
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}
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}
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static int add_one_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
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const char *email, unsigned long timestamp, int tz,
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const char *message, void *cb_data)
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{
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struct object *object;
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struct rev_info *revs = (struct rev_info *)cb_data;
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object = parse_object(osha1);
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if (object)
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add_pending_object(revs, object, "");
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object = parse_object(nsha1);
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if (object)
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add_pending_object(revs, object, "");
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return 0;
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}
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static int add_one_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
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{
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struct object *object = parse_object(sha1);
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struct rev_info *revs = (struct rev_info *)cb_data;
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if (!object)
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die("bad object ref: %s:%s", path, sha1_to_hex(sha1));
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add_pending_object(revs, object, "");
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return 0;
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}
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static int add_one_reflog(const char *path, const unsigned char *sha1, int flag, void *cb_data)
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{
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for_each_reflog_ent(path, add_one_reflog_ent, cb_data);
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return 0;
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}
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static void add_one_tree(const unsigned char *sha1, struct rev_info *revs)
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{
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struct tree *tree = lookup_tree(sha1);
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if (tree)
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add_pending_object(revs, &tree->object, "");
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}
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static void add_cache_tree(struct cache_tree *it, struct rev_info *revs)
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{
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int i;
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if (it->entry_count >= 0)
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add_one_tree(it->sha1, revs);
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for (i = 0; i < it->subtree_nr; i++)
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add_cache_tree(it->down[i]->cache_tree, revs);
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}
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static void add_cache_refs(struct rev_info *revs)
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{
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int i;
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read_cache();
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for (i = 0; i < active_nr; i++) {
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/*
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* The index can contain blobs and GITLINKs, GITLINKs are hashes
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* that don't actually point to objects in the repository, it's
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* almost guaranteed that they are NOT blobs, so we don't call
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* lookup_blob() on them, to avoid populating the hash table
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* with invalid information
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*/
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if (S_ISGITLINK(active_cache[i]->ce_mode))
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continue;
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lookup_blob(active_cache[i]->sha1);
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/*
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* We could add the blobs to the pending list, but quite
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* frankly, we don't care. Once we've looked them up, and
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* added them as objects, we've really done everything
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* there is to do for a blob
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*/
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}
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if (active_cache_tree)
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add_cache_tree(active_cache_tree, revs);
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}
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void mark_reachable_objects(struct rev_info *revs, int mark_reflog)
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{
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/*
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* Set up revision parsing, and mark us as being interested
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* in all object types, not just commits.
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*/
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revs->tag_objects = 1;
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revs->blob_objects = 1;
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revs->tree_objects = 1;
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/* Add all refs from the index file */
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add_cache_refs(revs);
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/* Add all external refs */
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for_each_ref(add_one_ref, revs);
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/* Add all reflog info */
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if (mark_reflog)
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for_each_reflog(add_one_reflog, revs);
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/*
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* Set up the revision walk - this will move all commits
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* from the pending list to the commit walking list.
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*/
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if (prepare_revision_walk(revs))
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die("revision walk setup failed");
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walk_commit_list(revs);
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}
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