Update prettier to 3.x (Azure#25673)

- Updated the json-swagger plugin to support the 3.x pretter
- Switch the plugin to be JS based to avoid the need to compile via TS
- Simplified plugin to delegate most work to the base estree plugin
- Move swagger plugin source under eng

.prettierrc.json

@@ -8,7 +8,7 @@
       ],
       "options": {
         "plugins": [
-          "./scripts/prettier-swagger-plugin"
+          "./eng/scripts/prettier-swagger-plugin.js"
         ],
         "parser": "json-swagger",
         "printWidth": 20,

documentation/ci-fix.md

@@ -30,19 +30,9 @@ cd specification/contosowidgetmanager
 # Install the dependencies to the local 'node_modules' folder.
 npm install
 
-# Compile TypeScript. Compilation will fail, this is expected. But it will compile 'scripts/prettier-swagger-plugin', which is what we need.
-npx tsc 
-
-# As of 5/25/2023, the prettier version should be 2.1.2
-npx prettier --version
-
 # Run 'prettier --check' to verify the problems can be reproduced locally
 npx prettier --check **/*.json
 
-# Run 'prettier --list-different' to understand which files have problems.
-# Note: there is no way to view the exact problems without actually changing the affected files. See https://github.com/prettier/prettier/issues/6069.
-npx prettier --list-different **/*.json
-
 # Run 'prettier --write' to fix the problems.
 npx prettier --write **/*.json
 ```

eng/scripts/prettier-swagger-plugin.js

@@ -0,0 +1,33 @@
+const plugins_estree = require("prettier/plugins/estree");
+const plugins_babel = require("prettier/plugins/babel")
+
+// Customize the standard json-stringify parser from https://github.com/prettier/prettier/blob/50404103ef7d96fb36f8cba1ac7bc40c671fd6cf/src/language-json/parser-json.js
+const print = (path, options, print) => {
+    const node = path.getValue();
+
+    if (node.type === "NumericLiteral") {
+        // Keep numeric literal as-is to allow values to have more then one trailing digit after the decimal like 100.00
+        return node.extra.raw;
+    }
+
+    return plugins_estree.printers['estree-json'].print(path, options, print);
+};
+
+exports.languages = [
+    {
+        name: 'json-swagger',
+        extensions: ['.json'],
+        parsers: ['json-swagger']
+    }
+];
+exports.parsers = {
+    'json-swagger': {
+        ...plugins_babel.parsers['json-stringify'],
+        astFormat: 'estree-swagger-customized'
+    }
+};
+exports.printers = {
+    'estree-swagger-customized': {
+        print
+    }
+};

package.json

@@ -7,15 +7,14 @@
     "@azure-tools/typespec-azure-resource-manager": "0.33.0",
     "@azure-tools/typespec-client-generator-core": "0.33.0",
     "@azure-tools/typespec-providerhub": "0.33.0",
-    "@types/prettier": "^2.7.2",
     "@typespec/compiler": "0.47.0",
     "@typespec/http": "0.47.0",
     "@typespec/openapi": "0.47.0",
     "@typespec/rest": "0.47.0",
     "@typespec/versioning": "0.47.0",
     "@azure/avocado": "^0.8.4",
     "azure-rest-api-specs-eng-tools": "file:eng/tools",
-    "prettier": "^2.8.8",
+    "prettier": "~3.0.3",
     "typescript": "~5.1.3"
   },
   "private": true