From 67598654b4c1af39169c1c132d16fe19ae72225b Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Thu, 14 Apr 2016 10:25:25 -0700
Subject: [PATCH] Don't print warnings when -q is passed

Closes #2571
---
 src/cargo/core/shell.rs     |  5 ++++-
 tests/test_cargo_install.rs | 15 +++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/cargo/core/shell.rs b/src/cargo/core/shell.rs
index 57876c97188..95750ef3480 100644
--- a/src/cargo/core/shell.rs
+++ b/src/cargo/core/shell.rs
@@ -100,7 +100,10 @@ impl MultiShell {
     }
 
     pub fn warn<T: fmt::Display>(&mut self, message: T) -> CargoResult<()> {
-        self.err().say_status("warning:", message, YELLOW, false)
+        match self.verbosity {
+            Quiet => Ok(()),
+            _ => self.err().say_status("warning:", message, YELLOW, false),
+        }
     }
 
     pub fn set_verbosity(&mut self, verbose: bool, quiet: bool) -> CargoResult<()> {
diff --git a/tests/test_cargo_install.rs b/tests/test_cargo_install.rs
index 59270d11771..31d9bf7fcd8 100644
--- a/tests/test_cargo_install.rs
+++ b/tests/test_cargo_install.rs
@@ -644,3 +644,18 @@ test!(git_with_lockfile {
     assert_that(cargo_process("install").arg("--git").arg(p.url().to_string()),
                 execs().with_status(0));
 });
+
+test!(q_silences_warnings {
+    let p = project("foo")
+        .file("Cargo.toml", r#"
+            [package]
+            name = "foo"
+            version = "0.1.0"
+            authors = []
+        "#)
+        .file("src/main.rs", "fn main() {}");
+    p.build();
+
+    assert_that(cargo_process("install").arg("-q").arg("--path").arg(p.root()),
+                execs().with_status(0).with_stderr(""));
+});