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-rw-r--r--builtin-prune.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/builtin-prune.c b/builtin-prune.c
new file mode 100644
index 0000000..44df59e
--- /dev/null
+++ b/builtin-prune.c
@@ -0,0 +1,100 @@
+#include "cache.h"
+#include "commit.h"
+#include "diff.h"
+#include "revision.h"
+#include "builtin.h"
+#include "reachable.h"
+
+static const char prune_usage[] = "git-prune [-n]";
+static int show_only;
+
+static int prune_object(char *path, const char *filename, const unsigned char *sha1)
+{
+ if (show_only) {
+ enum object_type type = sha1_object_info(sha1, NULL);
+ printf("%s %s\n", sha1_to_hex(sha1),
+ (type > 0) ? typename(type) : "unknown");
+ } else
+ unlink(mkpath("%s/%s", path, filename));
+ 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);
+ }
+ if (!show_only)
+ rmdir(path);
+ 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);
+ }
+}
+
+int cmd_prune(int argc, const char **argv, const char *prefix)
+{
+ int i;
+ struct rev_info revs;
+
+ for (i = 1; i < argc; i++) {
+ const char *arg = argv[i];
+ if (!strcmp(arg, "-n")) {
+ show_only = 1;
+ continue;
+ }
+ usage(prune_usage);
+ }
+
+ save_commit_buffer = 0;
+ init_revisions(&revs, prefix);
+ mark_reachable_objects(&revs, 1);
+
+ prune_object_dir(get_object_directory());
+
+ sync();
+ prune_packed_objects(show_only);
+ return 0;
+}