From 5cf8224d99522ea1ee3edffe3b1451d6dd82a606 Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Mon, 10 Jun 2019 07:12:44 -0700
Subject: [PATCH] Make `env_logger` an optional dependency

Only used during development no need to pull in its set of features when
typically compiled as a dependency of other crates!

Closes #1580
---
 crates/web-sys/Cargo.toml | 2 +-
 crates/web-sys/build.rs   | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/crates/web-sys/Cargo.toml b/crates/web-sys/Cargo.toml
index e282ceac1e1..500cd272637 100644
--- a/crates/web-sys/Cargo.toml
+++ b/crates/web-sys/Cargo.toml
@@ -20,7 +20,7 @@ doctest = false
 test = false
 
 [build-dependencies]
-env_logger = "0.6.0"
+env_logger = { version = "0.6.0", optional = true }
 failure = "0.1.2"
 wasm-bindgen-webidl = { path = "../webidl", version = "=0.2.45" }
 sourcefile = "0.1"
diff --git a/crates/web-sys/build.rs b/crates/web-sys/build.rs
index 401c54e364f..0b4f6aae937 100644
--- a/crates/web-sys/build.rs
+++ b/crates/web-sys/build.rs
@@ -8,6 +8,7 @@ use std::path::{self, PathBuf};
 use std::process::{self, Command};
 
 fn main() {
+    #[cfg(feature = "env_logger")]
     env_logger::init();
 
     if let Err(e) = try_main() {