Expose higher-level interface in Toolchain

Author: djc

src/cli/rustup_mode.rs

@@ -1508,9 +1508,7 @@ async fn man(
     toolchain: Option<PartialToolchainDesc>,
 ) -> Result<utils::ExitCode> {
     let toolchain = cfg.toolchain_from_partial(toolchain).await?;
-    let mut path = toolchain.path().to_path_buf();
-    path.push("share");
-    path.push("man");
+    let path = toolchain.man_path();
     utils::assert_is_directory(&path)?;
 
     let mut manpaths = std::ffi::OsString::from(path);

src/toolchain/toolchain.rs

@@ -136,7 +136,7 @@ impl<'a> Toolchain<'a> {
         &self.name
     }
 
-    pub(crate) fn path(&self) -> &Path {
+    pub(super) fn path(&self) -> &Path {
         &self.path
     }
 
@@ -395,6 +395,13 @@ impl<'a> Toolchain<'a> {
         Ok(cmd)
     }
 
+    #[cfg(not(windows))]
+    pub(crate) fn man_path(&self) -> PathBuf {
+        let mut buf = PathBuf::from(&self.path);
+        buf.extend(["share", "man"]);
+        buf
+    }
+
     pub fn doc_path(&self, relative: &str) -> anyhow::Result<PathBuf> {
         let parts = vec!["share", "doc", "rust", "html"];
         let mut doc_dir = self.path.clone();