Make webpack respect dependencies vs peerDependencies when deciding dependency is external (#7545)

Signed-off-by: Janne Savolainen <janne.savolainen@live.fi>

packages/infrastructure/webpack/src/plugins/get-dependency-name/get-dependency-name.js

@@ -0,0 +1,9 @@
+const getDependencyName = (requireString) => {
+  const [a, b] = requireString.split("/");
+
+  const scoped = a.startsWith("@");
+
+  return scoped ? `${a}/${b}` : a;
+};
+
+module.exports = { getDependencyName };

packages/infrastructure/webpack/src/plugins/get-dependency-name/get-dependency-name.test.js

@@ -0,0 +1,27 @@
+import { getDependencyName } from "./get-dependency-name";
+
+describe("get-dependency-name", () => {
+  it("given scoped dependency with entrypoint, returns dependency name", () => {
+    const actual = getDependencyName("@some-scope/some-package/entrypoint");
+
+    expect(actual).toBe("@some-scope/some-package");
+  });
+
+  it("given scoped dependency but no entrypoint, returns dependency name", () => {
+    const actual = getDependencyName("@some-scope/some-package");
+
+    expect(actual).toBe("@some-scope/some-package");
+  });
+
+  it("given non scoped dependency with entrypoint, returns dependency name", () => {
+    const actual = getDependencyName("some-package/some-entrypoint");
+
+    expect(actual).toBe("some-package");
+  });
+
+  it("given non scoped dependency but no entrypoint, returns dependency name", () => {
+    const actual = getDependencyName("some-package");
+
+    expect(actual).toBe("some-package");
+  });
+});