appveyor: Use Ninja/sccache on MSVC

Now that the final bug fixes have been merged into sccache we can start
leveraging sccache on the MSVC builders on AppVeyor instead of relying on the
ad-hoc caching strategy of trigger files and whatnot.

1 files changed, 43 insertions, 0 deletions

diff --git a/src/bootstrap/bin/sccache-plus-cl.rs b/src/bootstrap/bin/sccache-plus-cl.rs
new file mode 100644
index 00000000000..cf0c1274923
--- /dev/null
+++ b/src/bootstrap/bin/sccache-plus-cl.rs
@@ -0,0 +1,43 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+extern crate gcc;
+
+use std::env;
+use std::process::{self, Command};
+
+fn main() {
+    let target = env::var("SCCACHE_TARGET").unwrap();
+    // Locate the actual compiler that we're invoking
+    env::remove_var("CC");
+    env::remove_var("CXX");
+    let mut cfg = gcc::Config::new();
+    cfg.cargo_metadata(false)
+       .out_dir("/")
+       .target(&target)
+       .host(&target)
+       .opt_level(0)
+       .debug(false);
+    let compiler = cfg.get_compiler();
+
+    // Invoke sccache with said compiler
+    let sccache_path = env::var_os("SCCACHE_PATH").unwrap();
+    let mut cmd = Command::new(&sccache_path);
+    cmd.arg(compiler.path());
+    for &(ref k, ref v) in compiler.env() {
+        cmd.env(k, v);
+    }
+    for arg in env::args().skip(1) {
+        cmd.arg(arg);
+    }
+
+    let status = cmd.status().expect("failed to spawn");
+    process::exit(status.code().unwrap_or(2))
+}