t/test-lib.sh: add test_external and test_external_without_stderr

diff --git a/diff.c b/diff.c
index 1f46ff0f083fd307601b1e3e34e6626ec6801704..526249008662d4041e5623914c1a420f3443c4d4 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -19,7 +19,7 @@
 #endif
 
 static int diff_detect_rename_default;
-static int diff_rename_limit_default = 100;
+static int diff_rename_limit_default = 200;
 int diff_use_color_default = -1;
 static const char *external_diff_cmd_cfg;
 int diff_auto_refresh_index = 1;
@@ -514,9 +514,15 @@ const char *diff_get_color(int diff_use_color, enum color_diff ix)
 
 static void emit_line(FILE *file, const char *set, const char *reset, const char *line, int len)
 {
+       int has_trailing_newline = (len > 0 && line[len-1] == '\n');
+       if (has_trailing_newline)
+               len--;
+
        fputs(set, file);
        fwrite(line, len, 1, file);
        fputs(reset, file);
+       if (has_trailing_newline)
+               fputc('\n', file);
 }
 
 static void emit_add_line(const char *reset, struct emit_callback *ecbdata, const char *line, int len)
@@ -2496,6 +2502,8 @@ int diff_opt_parse(struct diff_options *options, const char **av, int ac)
                DIFF_OPT_SET(options, ALLOW_EXTERNAL);
        else if (!strcmp(arg, "--no-ext-diff"))
                DIFF_OPT_CLR(options, ALLOW_EXTERNAL);
+       else if (!strcmp(arg, "--ignore-submodules"))
+               DIFF_OPT_SET(options, IGNORE_SUBMODULES);
 
        /* misc options */
        else if (!strcmp(arg, "-z"))
@@ -3355,6 +3363,9 @@ void diff_addremove(struct diff_options *options,
        char concatpath[PATH_MAX];
        struct diff_filespec *one, *two;
 
+       if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(mode))
+               return;
+
        /* This may look odd, but it is a preparation for
         * feeding "there are unchanged files which should
         * not produce diffs, but when you are doing copy
@@ -3399,6 +3410,10 @@ void diff_change(struct diff_options *options,
        char concatpath[PATH_MAX];
        struct diff_filespec *one, *two;
 
+       if (DIFF_OPT_TST(options, IGNORE_SUBMODULES) && S_ISGITLINK(old_mode)
+                       && S_ISGITLINK(new_mode))
+               return;
+
        if (DIFF_OPT_TST(options, REVERSE_DIFF)) {
                unsigned tmp;
                const unsigned char *tmp_c;