send-pack: avoid deadlock on git:// push with failed pack-objects

diff --git a/diff-lib.c b/diff-lib.c
index 0aba6cda3c01e17b07bb7235b0395ba50256aedd..adf1c5fdee2bc836f03eaa89160573973bb46a67 100644 (file)
--- a/diff-lib.c
+++ b/diff-lib.c
@@ -162,7 +162,8 @@ int run_diff_files(struct rev_info *revs, unsigned int option)
                if (ce_uptodate(ce))
                        continue;
 
-               changed = check_removed(ce, &st);
+               /* If CE_VALID is set, don't look at workdir for file removal */
+               changed = (ce->ce_flags & CE_VALID) ? 0 : check_removed(ce, &st);
                if (changed) {
                        if (changed < 0) {
                                perror(ce->name);
@@ -308,22 +309,6 @@ static int show_modified(struct rev_info *revs,
        return 0;
 }
 
-/*
- * This turns all merge entries into "stage 3". That guarantees that
- * when we read in the new tree (into "stage 1"), we won't lose sight
- * of the fact that we had unmerged entries.
- */
-static void mark_merge_entries(void)
-{
-       int i;
-       for (i = 0; i < active_nr; i++) {
-               struct cache_entry *ce = active_cache[i];
-               if (!ce_stage(ce))
-                       continue;
-               ce->ce_flags |= CE_STAGEMASK;
-       }
-}
-
 /*
  * This gets a mix of an existing index and a tree, one pathname entry
  * at a time. The index entry may be a single stage-0 one, but it could
@@ -337,6 +322,8 @@ static void do_oneway_diff(struct unpack_trees_options *o,
        struct rev_info *revs = o->unpack_data;
        int match_missing, cached;
 
+       /* if the entry is not checked out, don't examine work tree */
+       cached = o->index_only || (idx && (idx->ce_flags & CE_VALID));
        /*
         * Backward compatibility wart - "diff-index -m" does
         * not mean "do not ignore merges", but "match_missing".
@@ -344,12 +331,11 @@ static void do_oneway_diff(struct unpack_trees_options *o,
         * But with the revision flag parsing, that's found in
         * "!revs->ignore_merges".
         */
-       cached = o->index_only;
        match_missing = !revs->ignore_merges;
 
        if (cached && idx && ce_stage(idx)) {
-               if (tree)
-                       diff_unmerge(&revs->diffopt, idx->name, idx->ce_mode, idx->sha1);
+               diff_unmerge(&revs->diffopt, idx->name, idx->ce_mode,
+                            idx->sha1);
                return;
        }
 
@@ -397,7 +383,7 @@ static inline void skip_same_name(struct cache_entry *ce, struct unpack_trees_op
  * For diffing, the index is more important, and we only have a
  * single tree.
  *
- * We're supposed to return how many index entries we want to skip.
+ * We're supposed to advance o->pos to skip what we have already processed.
  *
  * This wrapper makes it all more readable, and takes care of all
  * the fairly complex unpack_trees() semantic requirements, including
@@ -435,8 +421,6 @@ int run_diff_index(struct rev_info *revs, int cached)
        struct unpack_trees_options opts;
        struct tree_desc t;
 
-       mark_merge_entries();
-
        ent = revs->pending.objects[0].item;
        tree_name = revs->pending.objects[0].name;
        tree = parse_tree_indirect(ent->sha1);
@@ -446,6 +430,8 @@ int run_diff_index(struct rev_info *revs, int cached)
        memset(&opts, 0, sizeof(opts));
        opts.head_idx = 1;
        opts.index_only = cached;
+       opts.diff_index_cached = (cached &&
+                                 !DIFF_OPT_TST(&revs->diffopt, FIND_COPIES_HARDER));
        opts.merge = 1;
        opts.fn = oneway_diff;
        opts.unpack_data = revs;
@@ -502,6 +488,7 @@ int do_diff_cache(const unsigned char *tree_sha1, struct diff_options *opt)
        memset(&opts, 0, sizeof(opts));
        opts.head_idx = 1;
        opts.index_only = 1;
+       opts.diff_index_cached = !DIFF_OPT_TST(opt, FIND_COPIES_HARDER);
        opts.merge = 1;
        opts.fn = oneway_diff;
        opts.unpack_data = &revs;