test-repo/changelog_unreleased/api/13268.md

[BREAKING] The second argument parsers passed to parsers.parse has been removed (#13268 by @fisker)

The plugin's print function signature changed from

function parse(text: string, parsers: object, options: object): AST;

to

function parse(text: string, options: object): Promise<AST> | AST;

The second argument parsers has been removed, if you still need other parser during parse process, you can:

1. Import the parser yourself

   import parserBabel from "prettier/parser-babel.js";
   
   const myCustomPlugin = {
     parsers: {
       "my-custom-parser": {
         async parse(text) {
           const ast = await parserBabel.parsers.babel.parse(text);
           ast.program.body[0].expression.callee.name = "_";
           return ast;
         },
         astFormat: "estree",
       },
     },
   };
   

2. Get the parser from the options argument

   function getParserFromOptions(options, parserName) {
     const parserOrParserInitFunction = options.plugins.find(({ parsers }) =>
       Object.prototype.hasOwnProperty.call(parsers, parserName)
     )?.parsers[parserName];
     return typeof parserOrParserInitFunction === "function"
       ? parserOrParserInitFunction()
       : parserOrParserInitFunction;
   }
   
   const myCustomPlugin = {
     parsers: {
       "my-custom-parser": {
         async parse(text, options) {
           const babelParser = await getParserFromOptions(options, "babel");
           const ast = await babelParser.parse(text);
           ast.program.body[0].expression.callee.name = "_";
           return ast;
         },
         astFormat: "estree",
       },
     },
   };