--- /dev/null
+#include "cache.h"
+#include "refs.h"
+#include "tag.h"
+#include "commit.h"
+#include "tree.h"
+#include "blob.h"
+#include "tree-walk.h"
+#include "diff.h"
+#include "revision.h"
+#include "builtin.h"
+#include "cache-tree.h"
+
+static const char prune_usage[] = "git prune [-n]";
+static int show_only = 0;
+static struct rev_info revs;
+
+static int prune_object(char *path, const char *filename, const unsigned char *sha1)
+{
+ if (show_only) {
+ printf("would prune %s/%s\n", path, filename);
+ return 0;
+ }
+ unlink(mkpath("%s/%s", path, filename));
+ rmdir(path);
+ return 0;
+}
+
+static int prune_dir(int i, char *path)
+{
+ DIR *dir = opendir(path);
+ struct dirent *de;
+
+ if (!dir)
+ return 0;
+
+ while ((de = readdir(dir)) != NULL) {
+ char name[100];
+ unsigned char sha1[20];
+ int len = strlen(de->d_name);
+
+ switch (len) {
+ case 2:
+ if (de->d_name[1] != '.')
+ break;
+ case 1:
+ if (de->d_name[0] != '.')
+ break;
+ continue;
+ case 38:
+ sprintf(name, "%02x", i);
+ memcpy(name+2, de->d_name, len+1);
+ if (get_sha1_hex(name, sha1) < 0)
+ break;
+
+ /*
+ * Do we know about this object?
+ * It must have been reachable
+ */
+ if (lookup_object(sha1))
+ continue;
+
+ prune_object(path, de->d_name, sha1);
+ continue;
+ }
+ fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
+ }
+ closedir(dir);
+ return 0;
+}
+
+static void prune_object_dir(const char *path)
+{
+ int i;
+ for (i = 0; i < 256; i++) {
+ static char dir[4096];
+ sprintf(dir, "%s/%02x", path, i);
+ prune_dir(i, dir);
+ }
+}
+
+static void process_blob(struct blob *blob,
+ struct object_array *p,
+ struct name_path *path,
+ const char *name)
+{
+ struct object *obj = &blob->object;
+
+ if (obj->flags & SEEN)
+ return;
+ obj->flags |= SEEN;
+ /* Nothing to do, really .. The blob lookup was the important part */
+}
+
+static void process_tree(struct tree *tree,
+ struct object_array *p,
+ struct name_path *path,
+ const char *name)
+{
+ struct object *obj = &tree->object;
+ struct tree_desc desc;
+ struct name_entry entry;
+ struct name_path me;
+
+ if (obj->flags & SEEN)
+ return;
+ obj->flags |= SEEN;
+ if (parse_tree(tree) < 0)
+ die("bad tree object %s", sha1_to_hex(obj->sha1));
+ name = strdup(name);
+ add_object(obj, p, path, name);
+ me.up = path;
+ me.elem = name;
+ me.elem_len = strlen(name);
+
+ desc.buf = tree->buffer;
+ desc.size = tree->size;
+
+ while (tree_entry(&desc, &entry)) {
+ if (S_ISDIR(entry.mode))
+ process_tree(lookup_tree(entry.sha1), p, &me, entry.path);
+ else
+ process_blob(lookup_blob(entry.sha1), p, &me, entry.path);
+ }
+ free(tree->buffer);
+ tree->buffer = NULL;
+}
+
+static void process_tag(struct tag *tag, struct object_array *p, const char *name)
+{
+ struct object *obj = &tag->object;
+ struct name_path me;
+
+ if (obj->flags & SEEN)
+ return;
+ obj->flags |= SEEN;
+
+ me.up = NULL;
+ me.elem = "tag:/";
+ me.elem_len = 5;
+
+ if (parse_tag(tag) < 0)
+ die("bad tag object %s", sha1_to_hex(obj->sha1));
+ add_object(tag->tagged, p, NULL, name);
+}
+
+static void walk_commit_list(struct rev_info *revs)
+{
+ int i;
+ struct commit *commit;
+ struct object_array objects = { 0, 0, NULL };
+
+ /* Walk all commits, process their trees */
+ while ((commit = get_revision(revs)) != NULL)
+ process_tree(commit->tree, &objects, NULL, "");
+
+ /* 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 == TYPE_TAG) {
+ process_tag((struct tag *) obj, &objects, name);
+ continue;
+ }
+ if (obj->type == TYPE_TREE) {
+ process_tree((struct tree *)obj, &objects, NULL, name);
+ continue;
+ }
+ if (obj->type == TYPE_BLOB) {
+ process_blob((struct blob *)obj, &objects, NULL, name);
+ continue;
+ }
+ die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
+ }
+}
+
+static int add_one_ref(const char *path, const unsigned char *sha1)
+{
+ struct object *object = parse_object(sha1);
+ if (!object)
+ die("bad object ref: %s:%s", path, sha1_to_hex(sha1));
+ add_pending_object(&revs, object, "");
+ return 0;
+}
+
+static void add_one_tree(const unsigned char *sha1)
+{
+ struct tree *tree = lookup_tree(sha1);
+ add_pending_object(&revs, &tree->object, "");
+}
+
+static void add_cache_tree(struct cache_tree *it)
+{
+ int i;
+
+ if (it->entry_count >= 0)
+ add_one_tree(it->sha1);
+ for (i = 0; i < it->subtree_nr; i++)
+ add_cache_tree(it->down[i]->cache_tree);
+}
+
+static void add_cache_refs(void)
+{
+ int i;
+
+ read_cache();
+ for (i = 0; i < active_nr; i++) {
+ lookup_blob(active_cache[i]->sha1);
+ /*
+ * We could add the blobs to the pending list, but quite
+ * frankly, we don't care. Once we've looked them up, and
+ * added them as objects, we've really done everything
+ * there is to do for a blob
+ */
+ }
+ if (active_cache_tree)
+ add_cache_tree(active_cache_tree);
+}
+
+int cmd_prune(int argc, const char **argv, char **envp)
+{
+ int i;
+
+ for (i = 1; i < argc; i++) {
+ const char *arg = argv[i];
+ if (!strcmp(arg, "-n")) {
+ show_only = 1;
+ continue;
+ }
+ usage(prune_usage);
+ }
+
+ /*
+ * Set up revision parsing, and mark us as being interested
+ * in all object types, not just commits.
+ */
+ init_revisions(&revs);
+ revs.tag_objects = 1;
+ revs.blob_objects = 1;
+ revs.tree_objects = 1;
+
+ /* Add all external refs */
+ for_each_ref(add_one_ref);
+
+ /* Add all refs from the index file */
+ add_cache_refs();
+
+ /*
+ * Set up the revision walk - this will move all commits
+ * from the pending list to the commit walking list.
+ */
+ prepare_revision_walk(&revs);
+
+ walk_commit_list(&revs);
+
+ prune_object_dir(get_object_directory());
+
+ return 0;
+}
projects / git.git / commitdiff