From 2b5e32aaab457bf9eae6005687d24502dd219fd7 Mon Sep 17 00:00:00 2001
From: Noah <33094578+coolreader18@users.noreply.github.com>
Date: Thu, 13 Feb 2020 22:12:27 +0000
Subject: [PATCH] Make _random work on wasm

---
 Cargo.lock    | 1 +
 Lib/random.py | 8 +++++++-
 vm/Cargo.toml | 4 ++--
 3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index adda6f058..cc9f4166f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -636,6 +636,7 @@ dependencies = [
  "cfg-if",
  "libc",
  "wasi",
+ "wasm-bindgen",
 ]
 
 [[package]]
diff --git a/Lib/random.py b/Lib/random.py
index 61e881642..13f05f738 100644
--- a/Lib/random.py
+++ b/Lib/random.py
@@ -41,7 +41,13 @@ from warnings import warn as _warn
 from types import MethodType as _MethodType, BuiltinMethodType as _BuiltinMethodType
 from math import log as _log, exp as _exp, pi as _pi, e as _e, ceil as _ceil
 from math import sqrt as _sqrt, acos as _acos, cos as _cos, sin as _sin
-from os import urandom as _urandom
+try:
+    from os import urandom as _urandom
+except ImportError:
+    # On wasm, _random.Random.random() does give a proper random value, but
+    # we don't have the os module
+    def _urandom(*args, **kwargs):
+        raise NotImplementedError("urandom")
 from _collections_abc import Set as _Set, Sequence as _Sequence
 from hashlib import sha512 as _sha512
 import itertools as _itertools
diff --git a/vm/Cargo.toml b/vm/Cargo.toml
index 3b3dbf901..a026f9d4a 100644
--- a/vm/Cargo.toml
+++ b/vm/Cargo.toml
@@ -30,9 +30,9 @@ num-traits = "0.2.8"
 num-integer = "0.1.41"
 num-rational = "0.2.2"
 num-iter = "0.1.39"
-rand = "0.7"
+rand = { version = "0.7", features = ["wasm-bindgen"] }
 rand_core = "0.5"
-getrandom = "0.1"
+getrandom = { version = "0.1", features = ["wasm-bindgen"] }
 log = "0.4"
 rustpython-derive = {path = "../derive", version = "0.1.1"}
 rustpython-parser = {path = "../parser", optional = true, version = "0.1.1"}