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-rw-r--r--nix/netstring/fromString.nix10
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diff --git a/nix/netstring/fromString.nix b/nix/netstring/fromString.nix
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+{ ... }:
+# convert any nix string into a netstring
+# (prefixed by its length) according to https://en.wikipedia.org/wiki/Netstring
+#
+# Examples:
+#   netstring.fromString "foo"
+#   => "3:foo,"
+#   netstring.fromString ""
+#   => "0:,"
+s: "${toString (builtins.stringLength s)}:${s},"