add dirmir script

packages/_todo/dirmir.sh

@@ -0,0 +1,22 @@
+#!/bin/sh
+SOURCE="$1"
+TARGET="$2"
+
+if [ ! -d "$SOURCE" ] || [ $# -ne 2 ]; then
+  echo >/dev/stderr "Usage: $1 SOURCE TARGET"
+  exit 1
+fi
+
+if [ -e "$TARGET" ]; then
+  echo >/dev/stderr "$TARGET" already exists. Please use a different name.
+  exit 1
+fi
+
+for entry in $(find "$SOURCE"); do
+  if [ -d "$entry" ]; then
+    mkdir -p "$TARGET/$entry"
+  else
+    # create a file with the same permissions as $entry
+    install -m "$(stat -c %a "$entry")" /dev/null "$TARGET/$entry"
+  fi
+done