Merge branch 'lt/tree' into jc/lt-tree-n-cache-tree

[git.git] / builtin-read-tree.c

diff --git a/builtin-read-tree.c b/builtin-read-tree.c
index da0731c..b93178a 100644 (file)
--- a/builtin-read-tree.c
+++ b/builtin-read-tree.c
@@ -9,6 +9,8 @@
 
 #include "object.h"
 #include "tree.h"
+#include "cache-tree.h"
+#include "tree-walk.h"
 #include <sys/time.h>
 #include <signal.h>
 #include "builtin.h"
@@ -428,6 +430,12 @@ static void verify_uptodate(struct cache_entry *ce)
        die("Entry '%s' not uptodate. Cannot merge.", ce->name);
 }
 
+static void invalidate_ce_path(struct cache_entry *ce)
+{
+       if (ce)
+               cache_tree_invalidate_path(active_cache_tree, ce->name);
+}
+
 /*
  * We do not want to remove or overwrite a working tree file that
  * is not tracked.
@@ -458,10 +466,13 @@ static int merged_entry(struct cache_entry *merge, struct cache_entry *old)
                        *merge = *old;
                } else {
                        verify_uptodate(old);
+                       invalidate_ce_path(old);
                }
        }
-       else
+       else {
                verify_absent(merge->name, "overwritten");
+               invalidate_ce_path(merge);
+       }
 
        merge->ce_flags &= ~htons(CE_STAGEMASK);
        add_cache_entry(merge, ADD_CACHE_OK_TO_ADD);
@@ -476,6 +487,7 @@ static int deleted_entry(struct cache_entry *ce, struct cache_entry *old)
                verify_absent(ce->name, "removed");
        ce->ce_mode = 0;
        add_cache_entry(ce, ADD_CACHE_OK_TO_ADD);
+       invalidate_ce_path(ce);
        return 1;
 }
 
@@ -751,6 +763,7 @@ static int read_cache_unmerged(void)
                struct cache_entry *ce = active_cache[i];
                if (ce_stage(ce)) {
                        deleted++;
+                       invalidate_ce_path(ce);
                        continue;
                }
                if (deleted)
@@ -761,6 +774,51 @@ static int read_cache_unmerged(void)
        return deleted;
 }
 
+static void prime_cache_tree_rec(struct cache_tree *it, struct tree *tree)
+{
+       struct tree_desc desc;
+       int cnt = 0;
+
+       memcpy(it->sha1, tree->object.sha1, 20);
+       desc.buf = tree->buffer;
+       desc.size = tree->size;
+
+       while (desc.size) {
+               unsigned mode;
+               const char *name;
+               const unsigned char *sha1;
+
+               sha1 = tree_entry_extract(&desc, &name, &mode);
+               update_tree_entry(&desc);
+
+               if (!S_ISDIR(mode))
+                       cnt++;
+               else {
+                       struct cache_tree_sub *sub;
+                       struct tree *subtree;
+
+                       subtree = lookup_tree(sha1);
+                       if (!subtree->object.parsed)
+                               parse_tree(subtree);
+                       sub = cache_tree_sub(it, name);
+                       sub->cache_tree = cache_tree();
+                       prime_cache_tree_rec(sub->cache_tree, subtree);
+                       cnt += sub->cache_tree->entry_count;
+               }
+       }
+       it->entry_count = cnt;
+}
+
+static void prime_cache_tree(void)
+{
+       struct tree *tree = (struct tree *)trees->item;
+       if (!tree)
+               return;
+       active_cache_tree = cache_tree();
+       prime_cache_tree_rec(active_cache_tree, tree);
+
+}
+
 static const char read_tree_usage[] = "git-read-tree (<sha> | -m [--aggressive] [-u | -i] <sha1> [<sha2> [<sha3>]])";
 
 static struct cache_file cache_file;
@@ -862,10 +920,9 @@ int cmd_read_tree(int argc, const char **argv, char **envp)
                        fn = twoway_merge;
                        break;
                case 3:
-                       fn = threeway_merge;
-                       break;
                default:
                        fn = threeway_merge;
+                       cache_tree_free(&active_cache_tree);
                        break;
                }
 
@@ -876,6 +933,18 @@ int cmd_read_tree(int argc, const char **argv, char **envp)
        }
 
        unpack_trees(fn);
+
+       /*
+        * When reading only one tree (either the most basic form,
+        * "-m ent" or "--reset ent" form), we can obtain a fully
+        * valid cache-tree because the index must match exactly
+        * what came from the tree.
+        */
+       if (trees && trees->item && (!merge || (stage == 2))) {
+               cache_tree_free(&active_cache_tree);
+               prime_cache_tree();
+       }
+
        if (write_cache(newfd, active_cache, active_nr) ||
            commit_index_file(&cache_file))
                die("unable to write new index file");