git-fsck: add --lost-found option

diff --git a/builtin-fsck.c b/builtin-fsck.c
index 944a496650b6e13d2684bb221ee8bc7aadd78d6f..a6ef65ea321c614c7616862a44ce0af7998e5749 100644 (file)
--- a/builtin-fsck.c
+++ b/builtin-fsck.c
@@ -20,6 +20,7 @@ static int check_strict;
 static int keep_cache_objects;
 static unsigned char head_sha1[20];
 static int errors_found;
+static int write_lost_and_found;
 static int verbose;
 #define ERROR_OBJECT 01
 #define ERROR_REACHABLE 02
@@ -138,6 +139,21 @@ static void check_unreachable_object(struct object *obj)
        if (!obj->used) {
                printf("dangling %s %s\n", typename(obj->type),
                       sha1_to_hex(obj->sha1));
+               if (write_lost_and_found) {
+                       char *filename = git_path("lost-found/%s/%s",
+                               obj->type == OBJ_COMMIT ? "commit" : "other",
+                               sha1_to_hex(obj->sha1));
+                       FILE *f;
+
+                       if (safe_create_leading_directories(filename)) {
+                               error("Could not create lost-found");
+                               return;
+                       }
+                       if (!(f = fopen(filename, "w")))
+                               die("Could not open %s", filename);
+                       fprintf(f, "%s\n", sha1_to_hex(obj->sha1));
+                       fclose(f);
+               }
                return;
        }
 
@@ -685,6 +701,12 @@ int cmd_fsck(int argc, char **argv, const char *prefix)
                        verbose = 1;
                        continue;
                }
+               if (!strcmp(arg, "--lost-found")) {
+                       check_full = 1;
+                       include_reflogs = 0;
+                       write_lost_and_found = 1;
+                       continue;
+               }
                if (*arg == '-')
                        usage(fsck_usage);
        }