Added support for importing relative plugins implicitly, without starting with "./"

Author: fabiospampinato

src/utils.ts

@@ -111,9 +111,9 @@ function getGlobPaths(rootPath: string, globs: string[], withNodeModules: boolea
 }
 
 async function getModule<T = unknown>(modulePath: string): Promise<T> {
-  const moduleExports = await import(url.pathToFileURL(modulePath).href);
-  const module = moduleExports.default || moduleExports.exports || moduleExports;
-  return module;
+    const moduleExports = await import(url.pathToFileURL(modulePath).href);
+    const module = moduleExports.default || moduleExports.exports || moduleExports;
+    return module;
 }
 
 function getModulePath(name: string, rootPath: string): string {
@@ -143,8 +143,11 @@ async function getPluginOrExit(name: string): Promise<PrettierPlugin> {
 
 function getPluginPath(name: string): string {
   const rootPath = path.join(process.cwd(), "index.js");
-  const pluginPath = getModulePath(name, rootPath);
-  return pluginPath;
+  try {
+    return getModulePath(`./${name}`, rootPath);
+  } catch {
+    return getModulePath(name, rootPath);
+  }
 }
 
 function getPluginVersion(name: string): string | null {

test/__fixtures__/plugins/automatic/prettier-plugin-baz.js

@@ -1,9 +1,24 @@
-import createPlugin from "../../../config/utils/create-plugin.cjs";
-
-const plugin = createPlugin({
-  name: "baz",
-  print: (text) => `content from \`prettier-plugin-baz.js\` file + ${text}`,
-  finalNewLine: false,
-});
-
-export default plugin;
+export default {
+  languages: [
+    {
+      name: "baz",
+      parsers: ["baz"],
+      extensions: [`.${"baz"}`],
+    },
+  ],
+  parsers: {
+    baz: {
+      parse: (text) => ({ value: text }),
+      astFormat: "baz",
+    },
+  },
+  printers: {
+    baz: {
+      print(path, options) {
+        return (
+          `content from \`prettier-plugin-baz.js\` file + ${path.getValue().value}`
+        );
+      },
+    },
+  },
+};

test/__tests__/plugin-resolution.js

@@ -13,9 +13,7 @@ describe("loads --plugin by its relative path", () => {
   });
 });
 
-// TODO (43081j): we don't currently support loading relative paths without
-// the leading `./`
-describe.skip("loads --plugin by its relative path without leading ./", () => {
+describe("loads --plugin by its relative path without leading ./", () => {
   runCli("plugins", [
     "automatic/file.txt",
     "--parser=bar",
@@ -41,9 +39,7 @@ describe("loads --plugin by package name", () => {
   });
 });
 
-// TODO (43081j): we don't currently support loading relative paths without
-// the leading `./`
-describe.skip("loads --plugin by filename without leading ./, should resolve to file, not package", () => {
+describe("loads --plugin by filename without leading ./, should resolve to file, not package", () => {
   runCli("plugins/automatic", [
     "file.txt",
     "--parser=baz",