Set a user agent with the version when talking to the registry

This can be used to track what versions of Cargo are being used in the
wild, which can be very useful.

diff --git a/src/cargo/ops/registry.rs b/src/cargo/ops/registry.rs
index d937976f867acdc86448fcc9c9a208a1e5ef7b83..58b2894cd8beb1bfa58d2cf7a61b6924e677eef3 100644 (file)
--- a/src/cargo/ops/registry.rs
+++ b/src/cargo/ops/registry.rs
@@ -12,6 +12,7 @@ use term::color::BLACK;
 
 use url::percent_encoding::{percent_encode, QUERY_ENCODE_SET};
 
+use version;
 use core::source::Source;
 use core::{Package, SourceId, Workspace};
 use core::dependency::Kind;
@@ -196,6 +197,7 @@ pub fn http_handle(config: &Config) -> CargoResult<Easy> {
     handle.connect_timeout(Duration::new(30, 0))?;
     handle.low_speed_limit(10 /* bytes per second */)?;
     handle.low_speed_time(Duration::new(30, 0))?;
+    handle.useragent(&version())?;
     if let Some(proxy) = http_proxy(config)? {
         handle.proxy(&proxy)?;
     }