gc --auto: exclude base pack if not enough mem to "repack -ad"

diff --git a/pack-objects.h b/pack-objects.h
index cc9b9a9b90ca62e7a6e638928511a465fbb9974b..af4f46c02671597f810cd70aa25102d128a39a5f 100644 (file)
--- a/pack-objects.h
+++ b/pack-objects.h
@@ -1,6 +1,8 @@
 #ifndef PACK_OBJECTS_H
 #define PACK_OBJECTS_H
 
+#define DEFAULT_DELTA_CACHE_SIZE (256 * 1024 * 1024)
+
 struct object_entry {
        struct pack_idx_entry idx;
        unsigned long size;     /* uncompressed size */
@@ -30,12 +32,16 @@ struct object_entry {
 
        /*
         * State flags for depth-first search used for analyzing delta cycles.
+        *
+        * The depth is measured in delta-links to the base (so if A is a delta
+        * against B, then A has a depth of 1, and B a depth of 0).
         */
        enum {
                DFS_NONE = 0,
                DFS_ACTIVE,
                DFS_DONE
        } dfs_state;
+       int depth;
 };
 
 struct packing_data {