am: Fix launching of pager

diff --git a/builtin-read-tree.c b/builtin-read-tree.c
index 5fda9905fcfa5ccbc0f28578cd371314a8a7e5a7..8bdcab11389e8b4facab355f27f0e1926134b86f 100644 (file)
--- a/builtin-read-tree.c
+++ b/builtin-read-tree.c
@@ -65,6 +65,34 @@ static int exclude_per_directory_cb(const struct option *opt, const char *arg,
        return 0;
 }
 
+static void debug_stage(const char *label, struct cache_entry *ce,
+                       struct unpack_trees_options *o)
+{
+       printf("%s ", label);
+       if (!ce)
+               printf("(missing)\n");
+       else if (ce == o->df_conflict_entry)
+               printf("(conflict)\n");
+       else
+               printf("%06o #%d %s %.8s\n",
+                      ce->ce_mode, ce_stage(ce), ce->name,
+                      sha1_to_hex(ce->sha1));
+}
+
+static int debug_merge(struct cache_entry **stages, struct unpack_trees_options *o)
+{
+       int i;
+
+       printf("* %d-way merge\n", o->merge_size);
+       debug_stage("index", stages[0], o);
+       for (i = 1; i <= o->merge_size; i++) {
+               char buf[24];
+               sprintf(buf, "ent#%d", i);
+               debug_stage(buf, stages[i], o);
+       }
+       return 0;
+}
+
 static struct lock_file lock_file;
 
 int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
@@ -101,6 +129,8 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
                            "don't check the working tree after merging", 1),
                OPT_SET_INT(0, "no-sparse-checkout", &opts.skip_sparse_checkout,
                            "skip applying sparse checkout filter", 1),
+               OPT_SET_INT(0, "debug-unpack", &opts.debug_unpack,
+                           "debug unpack-trees", 1),
                OPT_END()
        };
 
@@ -169,6 +199,9 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
                        opts.head_idx = 1;
        }
 
+       if (opts.debug_unpack)
+               opts.fn = debug_merge;
+
        cache_tree_free(&active_cache_tree);
        for (i = 0; i < nr_trees; i++) {
                struct tree *tree = trees[i];
@@ -178,6 +211,9 @@ int cmd_read_tree(int argc, const char **argv, const char *unused_prefix)
        if (unpack_trees(nr_trees, t, &opts))
                return 128;
 
+       if (opts.debug_unpack)
+               return 0; /* do not write the index out */
+
        /*
         * When reading only one tree (either the most basic form,
         * "-m ent" or "--reset ent" form), we can obtain a fully