make it actually detect whether xwin and zigbuild are needed

cargo-dist/src/lib.rs

@@ -59,7 +59,7 @@ mod tests;
 
 /// dist env test -- make sure we have everything we need for a build.
 pub fn do_env_test(cfg: &Config) -> DistResult<()> {
-    let (dist, mut manifest) = tasks::gather_work(cfg)?;
+    let (dist, _manifest) = tasks::gather_work(cfg)?;
 
     let builds = dist.config.builds;
 
@@ -71,26 +71,28 @@ pub fn do_env_test(cfg: &Config) -> DistResult<()> {
 
     let tools = dist.tools;
 
+    let cargo = tools.cargo()?;
+    let host = cargo.host_target.parse()?;
+
     for step in dist
         .local_build_steps
         .iter()
         .chain(dist.global_build_steps.iter())
     {
         match step {
             BuildStep::Cargo(step) => {
-                println!("step = {:#?}", step);
-                /*
-                let host = step.host;
-                let target = step.target_triple;
-                // TODO: Figure out where to get host, target from?
-                let wrapper = tasks::build_wrapper_for_cross(host, target)?;
+                let target = step.target_triple.parse()?;
+                let wrapper = tasks::build_wrapper_for_cross(&host, &target)?;
 
                 match wrapper {
-                    Some(CargoBuildWrapper::Xwin) => { need_xwin = true; }
-                    Some(CargoBuildWrapper::ZigBuild) => { need_zigbuild = true; }
+                    Some(CargoBuildWrapper::Xwin) => {
+                        need_xwin = true;
+                    }
+                    Some(CargoBuildWrapper::ZigBuild) => {
+                        need_zigbuild = true;
+                    }
                     None => {}
                 }
-                */
             }
             _ => {}
         }