Use PkgType::is_preview to determine whether to add a rename to the manifest

This caught a missing preview rename for `llvm-tools`.

Author: jyn514

src/tools/build-manifest/src/main.rs

@@ -365,12 +365,11 @@ impl Builder {
         let mut rename = |from: &str, to: &str| {
             manifest.renames.insert(from.to_owned(), Rename { to: to.to_owned() })
         };
-        rename("rls", "rls-preview");
-        rename("rustfmt", "rustfmt-preview");
-        rename("clippy", "clippy-preview");
-        rename("miri", "miri-preview");
-        rename("rust-docs-json", "rust-docs-json-preview");
-        rename("rust-analyzer", "rust-analyzer-preview");
+        for pkg in PkgType::all() {
+            if pkg.is_preview() {
+                rename(pkg.tarball_component_name(), &pkg.manifest_component_name());
+            }
+        }
     }
 
     fn rust_package(&mut self, manifest: &Manifest) -> Package {

src/tools/build-manifest/src/versions.rs

@@ -17,7 +17,7 @@ macro_rules! pkg_type {
         }
 
         impl PkgType {
-            fn is_preview(&self) -> bool {
+            pub(crate) fn is_preview(&self) -> bool {
                 match self {
                     $( $( $($is_preview)? PkgType::$variant => true, )? )+
                     _ => false,
@@ -32,7 +32,7 @@ macro_rules! pkg_type {
             }
 
             /// First part of the tarball name.
-            fn tarball_component_name(&self) -> &str {
+            pub(crate) fn tarball_component_name(&self) -> &str {
                 match self {
                     $( PkgType::$variant => $component,)+
                     PkgType::Other(component) => component,