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

diff --git a/diff.c b/diff.c
index 439d4746cae343f08b298473d35d9792048abfa0..526249008662d4041e5623914c1a420f3443c4d4 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -129,7 +129,7 @@ static int parse_funcname_pattern(const char *var, const char *ep, const char *v
  * never be affected by the setting of diff.renames
  * the user happens to have in the configuration file.
  */
-int git_diff_ui_config(const char *var, const char *value)
+int git_diff_ui_config(const char *var, const char *value, void *cb)
 {
        if (!strcmp(var, "diff.renamelimit")) {
                diff_rename_limit_default = git_config_int(var, value);
@@ -166,10 +166,10 @@ int git_diff_ui_config(const char *var, const char *value)
                        return parse_lldiff_command(var, ep, value);
        }
 
-       return git_diff_basic_config(var, value);
+       return git_diff_basic_config(var, value, cb);
 }
 
-int git_diff_basic_config(const char *var, const char *value)
+int git_diff_basic_config(const char *var, const char *value, void *cb)
 {
        if (!prefixcmp(var, "diff.color.") || !prefixcmp(var, "color.diff.")) {
                int slot = parse_diff_color_slot(var, 11);
@@ -190,7 +190,7 @@ int git_diff_basic_config(const char *var, const char *value)
                }
        }
 
-       return git_color_default_config(var, value);
+       return git_color_default_config(var, value, cb);
 }
 
 static char *quote_two(const char *one, const char *two)
@@ -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;