Discover help routes through intermediate aliases

internal/alias/resolver.go

@@ -133,6 +133,20 @@ func (resolver *Resolver) Resolve(path commandpath.Path) commandpath.Path {
 	}
 }
 
+// ResolutionPaths returns the entered path and each path produced by a
+// longest-prefix rewrite. It supports metadata discovery along alias chains.
+// Installation validates termination before this method is used.
+func (resolver *Resolver) ResolutionPaths(path commandpath.Path) []commandpath.Path {
+	paths := []commandpath.Path{path.Clone()}
+	for {
+		next, _, matched := resolver.ResolveOnce(paths[len(paths)-1])
+		if !matched {
+			return paths
+		}
+		paths = append(paths, next)
+	}
+}
+
 // ResolveWithProvenance resolves a command path and carries the input token
 // indexes that contributed to each output component. Rewritten target
 // components inherit the origins of the matched source prefix.