Implement reusable interface conformance rules

src/capability-language/source-loader.ts

@@ -86,3 +86,21 @@ export const resolveQxSources = async (read: (name: string) => Promise<string>,
 };
 
 export const loadQxSources = (root: string) => resolveQxSources((name) => readQxSource(root, name));
+
+/** The same validated closure used by compilation, for installation and pinning. */
+export const qxSourceManifest = async (root: string) => {
+  const resolved = await loadQxSources(root);
+  const syntax = parseQx(resolved.source);
+  const imports = [...walkSyntax(syntax.root)]
+    .filter((node) => node.kind === "resourceImportDecl")
+    .map((node) => {
+      const name = node.children.find((child) => child.kind === "identifier")!;
+      const kind = syntax.tokens.some(
+        (token) => token.start >= node.start && token.end <= node.end && token.kind === "INTERFACE",
+      )
+        ? ("interface" as const)
+        : ("package" as const);
+      return { kind, binding: resolved.source.slice(name.start, name.end) };
+    });
+  return { sourceFiles: resolved.sourceFiles, imports };
+};