feat(cli): support prettier plugins (#551)

Install project dependencies if prettier fails to run.

Author: mathio

.changeset/flat-emus-hunt.md

@@ -0,0 +1,5 @@
+---
+"lingo.dev": patch
+---
+
+support prettier plugins

packages/cli/src/cli/loaders/prettier.ts

@@ -1,7 +1,9 @@
+import fs from "fs";
 import path from "path";
 import prettier, { Options } from "prettier";
 import { ILoader } from "./_types";
 import { createLoader } from "./_utils";
+import { execSync } from "child_process";
 
 export type PrettierLoaderOptions = {
   parser: Options["parser"];
@@ -23,7 +25,7 @@ export default function createPrettierLoader(options: PrettierLoaderOptions): IL
         return data;
       }
 
-      const result = prettier.format(data, {
+      const config: Options = {
         ...(prettierConfig || { printWidth: 2500, bracketSameLine: false }),
         parser: options.parser,
         // For HTML parser, preserve comments and quotes
@@ -34,9 +36,29 @@ export default function createPrettierLoader(options: PrettierLoaderOptions): IL
               embeddedLanguageFormatting: "off",
             }
           : {}),
-      });
+      };
 
-      return result;
+      try {
+        const result = await prettier.format(data, config);
+        return result;
+      } catch (error) {
+        if (error instanceof Error && error.message.startsWith("Cannot find package")) {
+          console.log();
+          console.log("Prettier is missing some dependecies - installing all project dependencies");
+
+          // prettier is missing dependencies - install all project dependencies
+          installDependencies();
+
+          // clear file system structure cache to find newly installed dependencies
+          await prettier.clearConfigCache();
+
+          // try to format again
+          const result = await prettier.format(data, config);
+          return result;
+        } else {
+          throw error;
+        }
+      }
     },
   });
 }
@@ -49,3 +71,24 @@ async function loadPrettierConfig(filePath: string) {
     return {};
   }
 }
+
+// install all dependencies using package manager
+async function installDependencies() {
+  const packageManager = await getPackageManager();
+  console.log(`Installing dependencies using ${packageManager}`);
+  execSync(`${packageManager} install --frozen-lockfile`, { stdio: "inherit" });
+  console.log(`Dependencies installed`);
+}
+
+// determine if yarn or pnpm is used based on lockfile, otherwise use npm
+async function getPackageManager() {
+  const yarnLockfile = path.resolve(process.cwd(), "yarn.lock");
+  const pnpmLockfile = path.resolve(process.cwd(), "pnpm-lock.yaml");
+  if (fs.existsSync(yarnLockfile)) {
+    return "yarn";
+  }
+  if (fs.existsSync(pnpmLockfile)) {
+    return "pnpm";
+  }
+  return "npm";
+}