submodule: Fix documentation of update subcommand

[git.git] / cache-tree.c

diff --git a/cache-tree.c b/cache-tree.c
index c53f7de2b13acfc1b97c60b04552e57791377442..32772b95644d2f32841984b25b685379c6914ad4 100644 (file)
--- a/cache-tree.c
+++ b/cache-tree.c
@@ -1,4 +1,5 @@
 #include "cache.h"
+#include "lockfile.h"
 #include "tree.h"
 #include "tree-walk.h"
 #include "cache-tree.h"
@@ -246,9 +247,12 @@ static int update_one(struct cache_tree *it,
        struct strbuf buffer;
        int missing_ok = flags & WRITE_TREE_MISSING_OK;
        int dryrun = flags & WRITE_TREE_DRY_RUN;
+       int repair = flags & WRITE_TREE_REPAIR;
        int to_invalidate = 0;
        int i;
 
+       assert(!(dryrun && repair));
+
        *skip_count = 0;
 
        if (0 <= it->entry_count && has_sha1_file(it->sha1))
@@ -299,6 +303,8 @@ static int update_one(struct cache_tree *it,
                                    flags);
                if (subcnt < 0)
                        return subcnt;
+               if (!subcnt)
+                       die("index cache-tree records empty sub-tree");
                i += subcnt;
                sub->count = subcnt; /* to be used in the next loop */
                *skip_count += subskip;
@@ -320,6 +326,7 @@ static int update_one(struct cache_tree *it,
                int pathlen, entlen;
                const unsigned char *sha1;
                unsigned mode;
+               int expected_missing = 0;
 
                path = ce->name;
                pathlen = ce_namelen(ce);
@@ -336,8 +343,10 @@ static int update_one(struct cache_tree *it,
                        i += sub->count;
                        sha1 = sub->cache_tree->sha1;
                        mode = S_IFDIR;
-                       if (sub->cache_tree->entry_count < 0)
+                       if (sub->cache_tree->entry_count < 0) {
                                to_invalidate = 1;
+                               expected_missing = 1;
+                       }
                }
                else {
                        sha1 = ce->sha1;
@@ -347,6 +356,8 @@ static int update_one(struct cache_tree *it,
                }
                if (mode != S_IFGITLINK && !missing_ok && !has_sha1_file(sha1)) {
                        strbuf_release(&buffer);
+                       if (expected_missing)
+                               return -1;
                        return error("invalid object %06o %s for '%.*s'",
                                mode, sha1_to_hex(sha1), entlen+baselen, path);
                }
@@ -381,7 +392,14 @@ static int update_one(struct cache_tree *it,
 #endif
        }
 
-       if (dryrun)
+       if (repair) {
+               unsigned char sha1[20];
+               hash_sha1_file(buffer.buf, buffer.len, tree_type, sha1);
+               if (has_sha1_file(sha1))
+                       hashcpy(it->sha1, sha1);
+               else
+                       to_invalidate = 1;
+       } else if (dryrun)
                hash_sha1_file(buffer.buf, buffer.len, tree_type, it->sha1);
        else if (write_sha1_file(buffer.buf, buffer.len, tree_type, it->sha1)) {
                strbuf_release(&buffer);