made the pack completely portable and wrote relevent bat files to go with it

gitportable/usr/share/awk/assert.awk

@@ -0,0 +1,20 @@
+# assert --- assert that a condition is true. Otherwise, exit.
+
+#
+# Arnold Robbins, arnold@skeeve.com, Public Domain
+# May, 1993
+
+function assert(condition, string)
+{
+    if (! condition) {
+        printf("%s:%d: assertion failed: %s\n",
+            FILENAME, FNR, string) > "/dev/stderr"
+        _assert_exit = 1
+        exit 1
+    }
+}
+
+END {
+    if (_assert_exit)
+        exit 1
+}