Documentation/hooks: add pre-auto-gc hook

diff --git a/builtin-read-tree.c b/builtin-read-tree.c
index a3b17a3bd913d628d70ee625ec8b1808d3b200fa..e9cfd2bbc5539ee0c9c048798383b837ff63991b 100644 (file)
--- a/builtin-read-tree.c
+++ b/builtin-read-tree.c
@@ -13,14 +13,19 @@
 #include "dir.h"
 #include "builtin.h"
 
-static struct object_list *trees;
+static int nr_trees;
+static struct tree *trees[MAX_UNPACK_TREES];
 
 static int list_tree(unsigned char *sha1)
 {
-       struct tree *tree = parse_tree_indirect(sha1);
+       struct tree *tree;
+
+       if (nr_trees >= MAX_UNPACK_TREES)
+               die("I cannot read more than %d trees", MAX_UNPACK_TREES);
+       tree = parse_tree_indirect(sha1);
        if (!tree)
                return -1;
-       object_list_append(&tree->object, &trees);
+       trees[nr_trees++] = tree;
        return 0;
 }
 
@@ -35,12 +40,12 @@ static int read_cache_unmerged(void)
        for (i = 0; i < active_nr; i++) {
                struct cache_entry *ce = active_cache[i];
                if (ce_stage(ce)) {
+                       remove_index_entry(ce);
                        if (last && !strcmp(ce->name, last->name))
                                continue;
                        cache_tree_invalidate_path(active_cache_tree, ce->name);
                        last = ce;
-                       ce->ce_mode = 0;
-                       ce->ce_flags &= ~htons(CE_STAGEMASK);
+                       continue;
                }
                *dst++ = ce;
        }
@@ -76,11 +81,10 @@ static void prime_cache_tree_rec(struct cache_tree *it, struct tree *tree)
 
 static void prime_cache_tree(void)
 {
-       struct tree *tree = (struct tree *)trees->item;
-       if (!tree)
+       if (!nr_trees)
                return;
        active_cache_tree = cache_tree();
-       prime_cache_tree_rec(active_cache_tree, tree);
+       prime_cache_tree_rec(active_cache_tree, trees[0]);
 
 }
 
@@ -92,10 +96,13 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
 {
        int i, newfd, stage = 0;
        unsigned char sha1[20];
+       struct tree_desc t[MAX_UNPACK_TREES];
        struct unpack_trees_options opts;
 
        memset(&opts, 0, sizeof(opts));
        opts.head_idx = -1;
+       opts.src_index = &the_index;
+       opts.dst_index = &the_index;
 
        git_config(git_default_config);
 
@@ -214,27 +221,6 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
        if ((opts.dir && !opts.update))
                die("--exclude-per-directory is meaningless unless -u");
 
-       if (opts.prefix) {
-               int pfxlen = strlen(opts.prefix);
-               int pos;
-               if (opts.prefix[pfxlen-1] != '/')
-                       die("prefix must end with /");
-               if (stage != 2)
-                       die("binding merge takes only one tree");
-               pos = cache_name_pos(opts.prefix, pfxlen);
-               if (0 <= pos)
-                       die("corrupt index file");
-               pos = -pos-1;
-               if (pos < active_nr &&
-                   !strncmp(active_cache[pos]->name, opts.prefix, pfxlen))
-                       die("subdirectory '%s' already exists.", opts.prefix);
-               pos = cache_name_pos(opts.prefix, pfxlen-1);
-               if (0 <= pos)
-                       die("file '%.*s' already exists.",
-                                       pfxlen-1, opts.prefix);
-               opts.pos = -1 - pos;
-       }
-
        if (opts.merge) {
                if (stage < 2)
                        die("just how do you expect me to merge %d trees?", stage-1);
@@ -258,7 +244,13 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
                        opts.head_idx = 1;
        }
 
-       unpack_trees(trees, &opts);
+       for (i = 0; i < nr_trees; i++) {
+               struct tree *tree = trees[i];
+               parse_tree(tree);
+               init_tree_desc(t+i, tree->buffer, tree->size);
+       }
+       if (unpack_trees(nr_trees, t, &opts))
+               return 128;
 
        /*
         * When reading only one tree (either the most basic form,
@@ -266,13 +258,13 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
         * valid cache-tree because the index must match exactly
         * what came from the tree.
         */
-       if (trees && trees->item && !opts.prefix && (!opts.merge || (stage == 2))) {
+       if (nr_trees && !opts.prefix && (!opts.merge || (stage == 2))) {
                cache_tree_free(&active_cache_tree);
                prime_cache_tree();
        }
 
        if (write_cache(newfd, active_cache, active_nr) ||
-           close(newfd) || commit_locked_index(&lock_file))
+           commit_locked_index(&lock_file))
                die("unable to write new index file");
        return 0;
 }