From 033325455a1c12eac13793b0fd85e4162f19375d Mon Sep 17 00:00:00 2001
From: Nat Quayle Nelson <natquaylenelson@gmail.com>
Date: Thu, 12 Aug 2021 12:54:52 -0600
Subject: [PATCH] Close #40

---
 src/kiss/Kiss.hx    |  1 +
 src/kiss/Prelude.hx | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/src/kiss/Kiss.hx b/src/kiss/Kiss.hx
index 45dc76e..b96ed37 100644
--- a/src/kiss/Kiss.hx
+++ b/src/kiss/Kiss.hx
@@ -77,6 +77,7 @@ class Kiss {
                 "enumerate" => Symbol("Prelude.enumerate"),
                 "assertProcess" => Symbol("Prelude.assertProcess"),
                 "random" => Symbol("Std.random"),
+                "walkDirectory" => Symbol("Prelude.walkDirectory"),
                 // These work with (apply) because they are added as "opAliases" in Macros.kiss:
                 "min" => Symbol("Prelude.min"),
                 "max" => Symbol("Prelude.max"),
diff --git a/src/kiss/Prelude.hx b/src/kiss/Prelude.hx
index 9bf4905..b38da42 100644
--- a/src/kiss/Prelude.hx
+++ b/src/kiss/Prelude.hx
@@ -11,6 +11,9 @@ import js.node.Buffer;
 #elseif sys
 import sys.io.Process;
 #end
+#if (sys || hxnodejs)
+import sys.FileSystem;
+#end
 #if python
 import python.lib.subprocess.Popen;
 import python.Bytearray;
@@ -373,6 +376,23 @@ class Prelude {
     private static var kissProcess:Process = null;
     #end
 
+    public static function walkDirectory(basePath, directory, processFile:(String) -> Void, processSubdirectory:(String) -> Void) {
+        #if (sys || hxnodejs)
+        for (fileOrFolder in FileSystem.readDirectory(joinPath(basePath, directory))) {
+            switch (fileOrFolder) {
+                case folder if (FileSystem.isDirectory(joinPath(basePath, directory, folder))):
+                    var subdirectory = joinPath(directory, folder);
+                    processSubdirectory(subdirectory);
+                    walkDirectory(basePath, subdirectory, processFile, processSubdirectory);
+                case file:
+                    processFile(joinPath(directory, file));
+            }
+        }
+        #else
+        throw "Can't walk a directory on this target.";
+        #end
+    }
+
     /**
      * On Sys targets and nodejs, Kiss can be converted to hscript at runtime
      * NOTE on non-nodejs targets, after the first time calling this function,