mirror of
https://github.com/git/git
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![Nguyễn Thái Ngọc Duy](/assets/img/avatar_default.png)
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
207 lines
4.8 KiB
C
207 lines
4.8 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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#include "progress.h"
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#include "list-objects.h"
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struct connectivity_progress {
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struct progress *progress;
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unsigned long count;
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};
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static void update_progress(struct connectivity_progress *cp)
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{
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cp->count++;
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if ((cp->count & 1023) == 0)
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display_progress(cp->progress, cp->count);
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}
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static int add_one_ref(const char *path, const struct object_id *oid,
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int flag, void *cb_data)
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{
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struct rev_info *revs = (struct rev_info *)cb_data;
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struct object *object;
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if ((flag & REF_ISSYMREF) && (flag & REF_ISBROKEN)) {
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warning("symbolic ref is dangling: %s", path);
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return 0;
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}
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object = parse_object_or_die(oid->hash, path);
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add_pending_object(revs, object, "");
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return 0;
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}
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/*
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* The traversal will have already marked us as SEEN, so we
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* only need to handle any progress reporting here.
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*/
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static void mark_object(struct object *obj, const char *name, void *data)
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{
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update_progress(data);
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}
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static void mark_commit(struct commit *c, void *data)
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{
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mark_object(&c->object, NULL, data);
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}
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struct recent_data {
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struct rev_info *revs;
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unsigned long timestamp;
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};
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static void add_recent_object(const unsigned char *sha1,
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unsigned long mtime,
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struct recent_data *data)
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{
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struct object *obj;
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enum object_type type;
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if (mtime <= data->timestamp)
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return;
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/*
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* We do not want to call parse_object here, because
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* inflating blobs and trees could be very expensive.
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* However, we do need to know the correct type for
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* later processing, and the revision machinery expects
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* commits and tags to have been parsed.
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*/
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type = sha1_object_info(sha1, NULL);
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if (type < 0)
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die("unable to get object info for %s", sha1_to_hex(sha1));
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switch (type) {
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case OBJ_TAG:
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case OBJ_COMMIT:
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obj = parse_object_or_die(sha1, NULL);
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break;
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case OBJ_TREE:
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obj = (struct object *)lookup_tree(sha1);
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break;
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case OBJ_BLOB:
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obj = (struct object *)lookup_blob(sha1);
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break;
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default:
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die("unknown object type for %s: %s",
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sha1_to_hex(sha1), typename(type));
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}
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if (!obj)
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die("unable to lookup %s", sha1_to_hex(sha1));
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add_pending_object(data->revs, obj, "");
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}
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static int add_recent_loose(const unsigned char *sha1,
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const char *path, void *data)
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{
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struct stat st;
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struct object *obj = lookup_object(sha1);
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if (obj && obj->flags & SEEN)
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return 0;
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if (stat(path, &st) < 0) {
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/*
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* It's OK if an object went away during our iteration; this
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* could be due to a simultaneous repack. But anything else
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* we should abort, since we might then fail to mark objects
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* which should not be pruned.
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*/
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if (errno == ENOENT)
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return 0;
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return error_errno("unable to stat %s", sha1_to_hex(sha1));
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}
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add_recent_object(sha1, st.st_mtime, data);
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return 0;
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}
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static int add_recent_packed(const unsigned char *sha1,
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struct packed_git *p, uint32_t pos,
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void *data)
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{
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struct object *obj = lookup_object(sha1);
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if (obj && obj->flags & SEEN)
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return 0;
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add_recent_object(sha1, p->mtime, data);
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return 0;
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}
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int add_unseen_recent_objects_to_traversal(struct rev_info *revs,
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unsigned long timestamp)
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{
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struct recent_data data;
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int r;
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data.revs = revs;
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data.timestamp = timestamp;
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r = for_each_loose_object(add_recent_loose, &data,
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FOR_EACH_OBJECT_LOCAL_ONLY);
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if (r)
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return r;
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return for_each_packed_object(add_recent_packed, &data,
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FOR_EACH_OBJECT_LOCAL_ONLY);
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}
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void mark_reachable_objects(struct rev_info *revs, int mark_reflog,
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unsigned long mark_recent,
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struct progress *progress)
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{
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struct connectivity_progress cp;
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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_index_objects_to_pending(revs, 0);
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/* Add all external refs */
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for_each_ref(add_one_ref, revs);
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/* detached HEAD is not included in the list above */
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head_ref(add_one_ref, revs);
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/* Add all reflog info */
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if (mark_reflog)
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add_reflogs_to_pending(revs, 0);
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cp.progress = progress;
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cp.count = 0;
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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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traverse_commit_list(revs, mark_commit, mark_object, &cp);
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if (mark_recent) {
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revs->ignore_missing_links = 1;
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if (add_unseen_recent_objects_to_traversal(revs, mark_recent))
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die("unable to mark recent objects");
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if (prepare_revision_walk(revs))
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die("revision walk setup failed");
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traverse_commit_list(revs, mark_commit, mark_object, &cp);
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}
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display_progress(cp.progress, cp.count);
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}
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