From 394590c4b35edbfbb5a503923fed0c8cbb382410 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Tue, 12 Jun 2018 20:08:24 +0200
Subject: import writers from stockholm 0bc2409

---
 lib/types.nix | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 lib/types.nix

(limited to 'lib/types.nix')

diff --git a/lib/types.nix b/lib/types.nix
new file mode 100644
index 0000000..197633e
--- /dev/null
+++ b/lib/types.nix
@@ -0,0 +1,23 @@
+{ lib, ... }:
+with lib;
+rec {
+  # POSIX.1‐2013, 3.2 Absolute Pathname
+  absolute-pathname = mkOptionType {
+    name = "POSIX absolute pathname";
+    check = x: isString x && substring 0 1 x == "/" && pathname.check x;
+    merge = mergeOneOption;
+  };
+
+  file-mode = mkOptionType {
+    name = "file mode";
+    check = test "[0-7]{4}";
+    merge = mergeOneOption;
+  };
+
+  # POSIX.1‐2013, 3.278 Portable Filename Character Set
+  filename = mkOptionType {
+    name = "POSIX filename";
+    check = test "([0-9A-Za-z._])[0-9A-Za-z._-]*";
+    merge = mergeOneOption;
+  };
+}
-- 
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