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-rw-r--r--lib/default.nix24
-rw-r--r--lib/types.nix23
2 files changed, 47 insertions, 0 deletions
diff --git a/lib/default.nix b/lib/default.nix
new file mode 100644
index 0000000..01d43f7
--- /dev/null
+++ b/lib/default.nix
@@ -0,0 +1,24 @@
+let {
+ body = lib;
+
+ lib = nixpkgs.lib // builtins // (with lib; {
+ genAttrs' = names: f: listToAttrs (map f names);
+ getAttrs = names: set:
+ listToAttrs (map (name: nameValuePair name set.${name})
+ (filter (flip hasAttr set) names));
+ toC = x: let
+ type = typeOf x;
+ reject = throw "cannot convert ${type}";
+ in {
+ list = "{ ${concatStringsSep ", " (map toC x)} }";
+ null = "NULL";
+ set = if isDerivation x then toJSON x else reject;
+ string = toJSON x; # close enough
+ }.${type} or reject;
+ test = re: x: isString x && testString re x;
+ testString = re: x: match re x != null;
+ types = nixpkgs.lib.types // import ./types.nix { lib = body; };
+ });
+
+ nixpkgs.lib = import <nixpkgs/lib>;
+}
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;
+ };
+}