fix: inject function only on prebuild (#111)

* fix: inject function only on prebuild

When running the plugin with the netlify-react-ui locally or running the
circle ci tests would fail. This is because netlify-react-ui would run
the csp edge function before the page was even bundled.

* fix tests

index.js

@@ -92,4 +92,15 @@ export const onPreBuild = async ({
   console.log(`  Done.`);
 };
 
-export const onPreDev = onPreBuild;
+export const onPreDev = async ({ inputs, netlifyConfig, utils, constants }) => {
+  if (!process.env.RUN_NETLIFY_CSP_NONCE_PLUGIN_TESTS) {
+    return;
+  }
+
+  return onPreBuild({
+    inputs,
+    netlifyConfig,
+    utils,
+    constants,
+  });
+};

tests/integration/helpers.ts

@@ -30,6 +30,7 @@ export const serve = async ({
   const proc = execa(...command(port), {
     all: true,
     cancelSignal: abortController.signal,
+    env: { RUN_NETLIFY_CSP_NONCE_PLUGIN_TESTS: "1" },
   });
 
   await new Promise<void>((resolve) => {