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diff --git a/builtin-diff-tree.c b/builtin-diff-tree.c
index 3409a39a9f73f9ed67547f5cc79619c1e402f47b..24cb2d7f84064d7833fa04f33aeca6eafc8b931d 100644 (file)
--- a/builtin-diff-tree.c
+++ b/builtin-diff-tree.c
@@ -59,7 +59,7 @@ static const char diff_tree_usage[] =
 "  --root        include the initial commit as diff against /dev/null\n"
 COMMON_DIFF_OPTIONS_HELP;
 
-int cmd_diff_tree(int argc, const char **argv, char **envp)
+int cmd_diff_tree(int argc, const char **argv, const char *prefix)
 {
        int nr_sha1;
        char line[1000];
@@ -67,9 +67,9 @@ int cmd_diff_tree(int argc, const char **argv, char **envp)
        static struct rev_info *opt = &log_tree_opt;
        int read_stdin = 0;
 
-       git_config(git_diff_config);
+       init_revisions(opt, prefix);
+       git_config(git_default_config); /* no "diff" UI options */
        nr_sha1 = 0;
-       init_revisions(opt);
        opt->abbrev = 0;
        opt->diff = 1;
        argc = setup_revisions(argc, argv, opt, NULL);
@@ -84,6 +84,9 @@ int cmd_diff_tree(int argc, const char **argv, char **envp)
                usage(diff_tree_usage);
        }
 
+       if (!opt->diffopt.output_format)
+               opt->diffopt.output_format = DIFF_FORMAT_RAW;
+
        /*
         * NOTE! We expect "a ^b" to be equal to "a..b", so we
         * reverse the order of the objects if the second one