chore: make prettier peer dependency meta (#1829)

Author: rishabh3112

packages/utils/package.json

@@ -16,10 +16,14 @@
     "got": "10.7.0",
     "jscodeshift": "0.7.0",
     "p-each-series": "2.1.0",
-    "prettier": "1.19.1",
     "yeoman-environment": "2.8.1",
     "yeoman-generator": "4.7.2"
   },
+  "peerDependenciesMeta": {
+    "prettier": {
+      "optional": true
+    }
+  },
   "peerDependencies": {
     "webpack": "4.x.x || 5.x.x",
     "webpack-cli": "4.x.x || 5.x.x"

packages/utils/src/run-prettier.ts

@@ -1,5 +1,4 @@
 import fs from 'fs';
-import prettier from 'prettier';
 import logger from 'webpack-cli/lib/utils/logger';
 
 /**
@@ -13,6 +12,18 @@ import logger from 'webpack-cli/lib/utils/logger';
 
 export function runPrettier(outputPath: string, source: string): void {
     let prettySource: string = source;
+
+    let prettier;
+    try {
+        // eslint-disable-next-line node/no-extraneous-require
+        prettier = require('prettier');
+    } catch (err) {
+        logger.warn(
+            "File is not properly formatted because you don't have prettier installed, you can either install it or format it manually",
+        );
+        return fs.writeFileSync(outputPath, source, 'utf8');
+    }
+
     try {
         prettySource = prettier.format(source, {
             filepath: outputPath,
@@ -25,6 +36,5 @@ export function runPrettier(outputPath: string, source: string): void {
         logger.warn(`\nWARNING: Could not apply prettier to ${outputPath} due to validation error, but the file has been created`);
         prettySource = source;
     }
-
     return fs.writeFileSync(outputPath, prettySource, 'utf8');
 }

yarn.lock

@@ -10190,11 +10190,6 @@ prettier-linter-helpers@^1.0.0:
   dependencies:
     fast-diff "^1.1.2"
 
-prettier@1.19.1:
-  version "1.19.1"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.19.1.tgz#f7d7f5ff8a9cd872a7be4ca142095956a60797cb"
-  integrity sha512-s7PoyDv/II1ObgQunCbB9PdLmUcBZcnWOcxDh7O0N/UwDEsHyqkW+Qh28jW+mVuCdx7gLB0BotYI1Y6uI9iyew==
-
 prettier@^2.0.5:
   version "2.0.5"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.0.5.tgz#d6d56282455243f2f92cc1716692c08aa31522d4"