feat(plugins): add support for loading ESM plugins

lib/plugins/utils.js

@@ -52,14 +52,18 @@ export async function loadPlugin({cwd}, name, pluginsPath) {
     ? dirname(resolveFrom.silent(__dirname, pluginsPath[name]) || resolveFrom(cwd, pluginsPath[name]))
     : __dirname;
 
-  if (!isFunction(name)) {
-    const file = resolveFrom.silent(basePath, name) || resolveFrom(cwd, name);
-    // See https://github.com/mysticatea/eslint-plugin-node/issues/250
-    // eslint-disable-next-line node/no-unsupported-features/es-syntax
-    name = (await import(`file://${file}`)).default;
+  if (isFunction(name)) {
+    return name;
   }
 
-  return name;
+  const file = resolveFrom.silent(basePath, name) || resolveFrom(cwd, name);
+  const { default: cjsExport, ...esmNamedExports } = await import(`file://${file}`);
+
+  if (cjsExport) {
+    return cjsExport;
+  }
+
+  return esmNamedExports;
 }
 
 export function parseConfig(plugin) {

test/fixtures/plugin-esm-named-exports.js

@@ -0,0 +1,3 @@
+export async function verifyConditions(pluginConfig, context) {
+  context.logger.log("verifyConditions called");
+}

test/integration.test.js

@@ -44,6 +44,7 @@ const cli = path.resolve("./bin/semantic-release.js");
 const pluginError = path.resolve("./test/fixtures/plugin-error");
 const pluginInheritedError = path.resolve("./test/fixtures/plugin-error-inherited");
 const pluginLogEnv = path.resolve("./test/fixtures/plugin-log-env");
+const pluginEsmNamedExports = path.resolve("./test/fixtures/plugin-esm-named-exports");
 
 test.before(async () => {
   await Promise.all([gitbox.start(), npmRegistry.start(), mockServer.start()]);
@@ -713,3 +714,26 @@ test("Use the repository URL as is if none of the given git credentials are vali
     dummyUrl
   );
 });
+
+test("ESM Plugin with named exports", async (t) => {
+  const packageName = "log-secret";
+  // Create a git repository, set the current working directory at the root of the repo
+  t.log("Create git repository");
+  const { cwd, repositoryUrl } = await gitbox.createRepo(packageName);
+  await writeJson(path.resolve(cwd, "package.json"), {
+    name: packageName,
+    version: "0.0.0-dev",
+    repository: { url: repositoryUrl },
+    release: { plugins: [pluginEsmNamedExports] },
+  });
+
+  t.log("$ semantic-release");
+  const { stdout, stderr } = await execa(cli, [], {
+    env: { ...env, MY_TOKEN: "secret token" },
+    cwd,
+    reject: false,
+    extendEnv: false,
+  });
+
+  t.regex(stdout, new RegExp(`verifyConditions called`));
+});

test/plugins/utils.test.js

@@ -199,7 +199,18 @@ test('loadPlugin', async (t) => {
     await loadPlugin({cwd}, './plugin-noop.cjs', {'./plugin-noop.cjs': './test/fixtures'}),
     'From a shareable config context'
   );
-  t.is(func, await loadPlugin({cwd}, func, {}), 'Defined as a function');
+  t.is(
+    (await import("../fixtures/plugin-noop.cjs")).default,
+    await loadPlugin({ cwd }, "./plugin-noop.cjs", { "./plugin-noop.cjs": "./test/fixtures" }),
+    "From a shareable config context"
+  );
+  const { ...namedExports } = await import("../fixtures/plugin-esm-named-exports.js");
+  const plugin = await loadPlugin({ cwd }, "./plugin-esm-named-exports.js", {
+    "./plugin-esm-named-exports.js": "./test/fixtures",
+  });
+
+  t.deepEqual(namedExports, plugin, "ESM with named exports");
+  t.is(func, await loadPlugin({ cwd }, func, {}), "Defined as a function");
 });
 
 test('parseConfig', (t) => {