rerere: don't segfault on failure to open rr-cache

diff --git a/diff-no-index.c b/diff-no-index.c
index 39868e2a8fa47e91f8d21814ac433b516fc9535c..4ebc1dbd87d9b90ad2aaa5c7d4601761e2d1d724 100644 (file)
--- a/diff-no-index.c
+++ b/diff-no-index.c
@@ -38,9 +38,13 @@ static int get_mode(const char *path, int *mode)
 
        if (!path || !strcmp(path, "/dev/null"))
                *mode = 0;
+#ifdef _WIN32
+       else if (!strcasecmp(path, "nul"))
+               *mode = 0;
+#endif
        else if (!strcmp(path, "-"))
                *mode = create_ce_mode(0666);
-       else if (stat(path, &st))
+       else if (lstat(path, &st))
                return error("Could not access '%s'", path);
        else
                *mode = st.st_mode;
@@ -200,22 +204,15 @@ void diff_no_index(struct rev_info *revs,
                die("git diff %s takes two paths",
                    no_index ? "--no-index" : "[--no-index]");
 
-       /*
-        * If the user asked for our exit code then don't start a
-        * pager or we would end up reporting its exit code instead.
-        */
-       if (!DIFF_OPT_TST(&revs->diffopt, EXIT_WITH_STATUS))
-               setup_pager();
-
        diff_setup(&revs->diffopt);
-       if (!revs->diffopt.output_format)
-               revs->diffopt.output_format = DIFF_FORMAT_PATCH;
        for (i = 1; i < argc - 2; ) {
                int j;
                if (!strcmp(argv[i], "--no-index"))
                        i++;
-               else if (!strcmp(argv[i], "-q"))
+               else if (!strcmp(argv[i], "-q")) {
                        options |= DIFF_SILENT_ON_REMOVED;
+                       i++;
+               }
                else if (!strcmp(argv[i], "--"))
                        i++;
                else {
@@ -226,10 +223,17 @@ void diff_no_index(struct rev_info *revs,
                }
        }
 
+       /*
+        * If the user asked for our exit code then don't start a
+        * pager or we would end up reporting its exit code instead.
+        */
+       if (!DIFF_OPT_TST(&revs->diffopt, EXIT_WITH_STATUS))
+               setup_pager();
+
        if (prefix) {
                int len = strlen(prefix);
 
-               revs->diffopt.paths = xcalloc(2, sizeof(char*));
+               revs->diffopt.paths = xcalloc(2, sizeof(char *));
                for (i = 0; i < 2; i++) {
                        const char *p = argv[argc - 2 + i];
                        /*
@@ -245,6 +249,9 @@ void diff_no_index(struct rev_info *revs,
        else
                revs->diffopt.paths = argv + argc - 2;
        revs->diffopt.nr_paths = 2;
+       revs->diffopt.skip_stat_unmatch = 1;
+       if (!revs->diffopt.output_format)
+               revs->diffopt.output_format = DIFF_FORMAT_PATCH;
 
        DIFF_OPT_SET(&revs->diffopt, EXIT_WITH_STATUS);
        DIFF_OPT_SET(&revs->diffopt, NO_INDEX);