Fix: use this.warn in rollup 2

Author: eight04

index.js

@@ -37,8 +37,20 @@ function createPlugin(globals, {include, exclude, dynamicWrapper = defaultDynami
   return {
     name: "rollup-plugin-external-globals",
     options,
-    transform
+    transform,
   };
+  function getDebug(context) {
+    return (err, message) => {
+      if (context.debug) {
+        context.debug({
+          message,
+          cause: err
+        });
+      } else if (context.warn) {
+        context.warn(message, err.loc ?? err.pos ?? null);
+      }
+    };
+  }
   async function options(rawOptions) {
     const plugins = Array.isArray(rawOptions.plugins)
       ? [...rawOptions.plugins]
@@ -59,10 +71,7 @@ function createPlugin(globals, {include, exclude, dynamicWrapper = defaultDynami
     try {
       ast = this.parse(code);
     } catch (err) {
-      this.debug({
-        message: `Failed to parse code, skip ${id}`,
-        cause: err
-      });
+      getDebug(this)(err, `Failed to parse code, skip ${id}`);
       return;
     }
     code = new MagicString(code);

test/test.js

@@ -9,13 +9,14 @@ const commonjs = require("@rollup/plugin-commonjs");
 
 const createPlugin = require("..");
 
-async function _bundle(rollup, file, globals, {plugins = []} = {}, options = {}) {
+async function _bundle(rollup, file, globals, {plugins = [], postPlugins = []} = {}, options = {}) {
   const warns = [];
   const bundle = await rollup.rollup({
     input: [file],
     plugins: [
       ...plugins,
-      createPlugin(globals, options)
+      createPlugin(globals, options),
+      ...postPlugins
     ],
     experimentalCodeSplitting: true,
     onwarn(warn) {
@@ -679,5 +680,35 @@ for (const r of [rollup, rollup2]) {
         `);
       })
     );
+
+    it("ignore non js files", () =>
+      withDir(`
+        - entry.txt: |
+            hello bar
+      `, async resolve => {
+        const {output: {"entry.js": {code}}} = await bundle(
+          resolve("entry.txt"),
+          {
+            bar: "BAR"
+          },
+          {
+            postPlugins: [
+              {
+                name: "test",
+                transform(code, id) {
+                  if (id.endsWith(".txt")) {
+                    return `export default ${JSON.stringify(code.trim())}`;
+                  }
+                }
+              }]
+          }
+        );
+        assert.equal(code.trim(), endent`
+        var entry = "hello bar";
+
+        export { entry as default };
+        `);
+      })
+    );
   });
 }