dm: allow multiple --skp flags, allow single files

dm/DM.cpp

Index: dm/DM.cpp
diff --git a/dm/DM.cpp b/dm/DM.cpp
index 900eb58a0322aad2f1016f6b1c99f8987bcbd64a..bf5e8d8d66e388f75eec99c9c4cf05a1307e981f 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -122,10 +122,15 @@ static void gather_srcs() {
     for (const skiagm::GMRegistry* r = skiagm::GMRegistry::Head(); r; r = r->next()) {
         push_src("gm", new GMSrc(r->factory()));
     }
-    if (!FLAGS_skps.isEmpty()) {
-        SkOSFile::Iter it(FLAGS_skps[0], "skp");
-        for (SkString file; it.next(&file); ) {
-            push_src("skp", new SKPSrc(SkOSPath::Join(FLAGS_skps[0], file.c_str())));
+    for (int i = 0; i < FLAGS_skps.count(); ++i) {

[mtklein, 2015/01/30 15:12:19]

Rest of the file uses i++.

[hal.canary, 2015/01/30 15:19:59]

Done.

+        const char* path = FLAGS_skps[i];
+        if (sk_isdir(path)) {
+            SkOSFile::Iter it(path, "skp");
+            for (SkString file; it.next(&file); ) {
+                push_src("skp", new SKPSrc(SkOSPath::Join(path, file.c_str())));
+            }
+        } else {
+            push_src("skp", new SKPSrc(SkString(path)));

[mtklein, 2015/01/30 15:12:19]

I think SKPSrc(path) will work fine here?

[hal.canary, 2015/01/30 15:19:59]

It does not.

         }
     }
     if (!FLAGS_images.isEmpty()) {