xtask: filter toolchains before .find()

xtask/src/main.rs

@@ -156,14 +156,6 @@ fn platform_triples<'a>(
     architectures
         .iter()
         .filter_map(|architecture| get_triple(*platform, *architecture).map(|v| v.triple))
-        .filter(|triple| {
-            if is_toolchain_installed(triple) {
-                true
-            } else {
-                log::warn!("toolchain not installed for {triple} - skipping");
-                false
-            }
-        })
 }
 
 fn platforms_and_triples(

xtask/src/types.rs

@@ -42,6 +42,7 @@ pub fn get_triple(
 ) -> Option<cfg_expr::targets::TargetInfo> {
     cfg_expr::targets::ALL_BUILTINS
         .iter()
+        .filter(|t| crate::is_toolchain_installed(&t.triple))
         .find(|b| {
             b.matches(&cfg_expr::TargetPredicate::Arch(architecture.as_cargo()))
                 && b.matches(&cfg_expr::TargetPredicate::Os(platform.as_cargo()))