astx/mjs/babel/BabelBackend.mjs

super powerful structural search and replace for JavaScript and TypeScript to automate your refactoring

import { Backend } from '../backend/Backend.mjs'
import * as defaultParser from '@babel/parser'
import * as defaultTypes from '@babel/types'
import * as defaultGenerator from '@babel/generator'
import babelAstTypes from './babelAstTypes.mjs'
import reprint from './reprint.mjs'
import detectChangedNodes from '../util/detectChangedNodes.mjs'
import { cloneAstWithOriginals } from '../util/cloneAstWithOriginals.mjs'
export default class BabelBackend extends Backend {
  t
  parse
  parseExpression
  parseStatements
  generator
  generate
  location
  comments

  constructor({
    parser = defaultParser,
    parserOptions,
    generator = defaultGenerator,
    types = defaultTypes,
    preserveFormat,
  } = {}) {
    super()
    const t = babelAstTypes(types)
    this.t = t

    this.parse = (code) =>
      cloneAstWithOriginals(parser.parse(code, parserOptions), code)

    this.parseExpression = (code) => parser.parseExpression(code, parserOptions)

    this.parseStatements = (code) => {
      const ast = this.parse(code)

      if (ast.type !== 'File') {
        throw new Error(`failed to get File node`)
      }

      return ast.program.body
    }

    this.generator = generator
    this.generate =
      preserveFormat === 'generatorHack'
        ? (node) => {
            detectChangedNodes(this.t, new t.NodePath(node))
            return reprint(this.generator, node)
          }
        : generator.default

    this.location = (node) => {
      var _node$loc,
        _node$loc$start,
        _node$loc2,
        _node$loc2$start,
        _node$loc3,
        _node$loc3$end,
        _node$loc4,
        _node$loc4$end

      return {
        start: node.start,
        end: node.end,
        startLine:
          (_node$loc = node.loc) === null || _node$loc === void 0
            ? void 0
            : (_node$loc$start = _node$loc.start) === null ||
              _node$loc$start === void 0
            ? void 0
            : _node$loc$start.line,
        startColumn:
          (_node$loc2 = node.loc) === null || _node$loc2 === void 0
            ? void 0
            : (_node$loc2$start = _node$loc2.start) === null ||
              _node$loc2$start === void 0
            ? void 0
            : _node$loc2$start.column,
        endLine:
          (_node$loc3 = node.loc) === null || _node$loc3 === void 0
            ? void 0
            : (_node$loc3$end = _node$loc3.end) === null ||
              _node$loc3$end === void 0
            ? void 0
            : _node$loc3$end.line,
        endColumn:
          (_node$loc4 = node.loc) === null || _node$loc4 === void 0
            ? void 0
            : (_node$loc4$end = _node$loc4.end) === null ||
              _node$loc4$end === void 0
            ? void 0
            : _node$loc4$end.column,
      }
    }

    this.comments = function* comments(node, kind) {
      if (!kind || kind === 'leading') {
        const { leadingComments } = node
        if (leadingComments) yield* leadingComments
      }
      if (!kind || kind === 'inner') {
        const { innerComments } = node
        if (innerComments) yield* innerComments
      }
      if (!kind || kind === 'trailing') {
        const { trailingComments } = node
        if (trailingComments) yield* trailingComments
      }
    }
  }
} //# sourceMappingURL=data:application/json;charset=utf-8;base64,{"version":3,"names":["Backend","defaultParser","defaultTypes","defaultGenerator","babelAstTypes","reprint","detectChangedNodes","cloneAstWithOriginals","BabelBackend","t","parse","parseExpression","parseStatements","generator","generate","location","comments","constructor","parser","parserOptions","types","preserveFormat","code","ast","type","Error","program","body","node","NodePath","default","start","end","startLine","loc","line","startColumn","column","endLine","endColumn","kind","leadingComments","innerComments","trailingComments"],"sources":["../../src/babel/BabelBackend.ts"],"sourcesContent":["import { Node, File, Statement, Expression } from '@babel/types'\nimport { Backend } from '../backend/Backend'\nimport * as defaultParser from '@babel/parser'\nimport { ParserOptions } from '@babel/parser'\nimport * as defaultTypes from '@babel/types'\nimport * as defaultGenerator from '@babel/generator'\nimport * as AstTypes from 'ast-types'\nimport babelAstTypes from './babelAstTypes'\nimport { Comment, Location } from '../types'\nimport reprint from './reprint'\nimport detectChangedNodes from '../util/detectChangedNodes'\nimport { cloneAstWithOriginals } from '../util/cloneAstWithOriginals'\n\ninterface Parser {\n  parse(code: string, parserOpts?: ParserOptions): File\n  parseExpression(code: string, parserOpts?: ParserOptions): Expression\n}\n\ntype Generate = (node: Node) => { code: string }\n\nexport default class BabelBackend extends Backend<Node> {\n  readonly t: typeof AstTypes\n  readonly parse: (code: string) => Node\n  readonly parseExpression: (code: string) => Expression\n  readonly parseStatements: (code: string) => Statement[]\n  readonly generator: typeof defaultGenerator\n  readonly generate: Generate\n  readonly location: (node: Node) => Location\n  readonly comments: (\n    node: Node,\n    kind?: 'leading' | 'inner' | 'trailing'\n  ) => Iterable<Comment>\n\n  constructor({\n    parser = defaultParser,\n    parserOptions,\n    generator = defaultGenerator,\n    types = defaultTypes,\n    preserveFormat,\n  }: {\n    parser?: Parser\n    parserOptions?: ParserOptions\n    generator?: typeof defaultGenerator\n    types?: typeof defaultTypes\n    preserveFormat?: 'generatorHack'\n  } = {}) {\n    super()\n\n    const t = babelAstTypes(types)\n\n    this.t = t\n    this.parse = (code: string) =>\n      cloneAstWithOriginals(parser.parse(code, parserOptions), code)\n    this.parseExpression = (code: string) =>\n      parser.parseExpression(code, parserOptions)\n    this.parseStatements = (code: string) => {\n      const ast = this.parse(code)\n      if (ast.type !== 'File') {\n        throw new Error(`failed to get File node`)\n      }\n      return ast.program.body\n    }\n    this.generator = generator\n    this.generate =\n      preserveFormat === 'generatorHack'\n        ? (node: Node) => {\n            detectChangedNodes(this.t, new t.NodePath(node))\n            return reprint(this.generator, node)\n          }\n        : generator.default\n    this.location = (node: Node) => ({\n      start: node.start,\n      end: node.end,\n      startLine: node.loc?.start?.line,\n      startColumn: node.loc?.start?.column,\n      endLine: node.loc?.end?.line,\n      endColumn: node.loc?.end?.column,\n    })\n    this.comments = function* comments(\n      node: Node,\n      kind?: 'leading' | 'inner' | 'trailing'\n    ): Iterable<Comment> {\n      if (!kind || kind === 'leading') {\n        const { leadingComments } = node\n        if (leadingComments) yield* leadingComments\n      }\n      if (!kind || kind === 'inner') {\n        const { innerComments } = node\n        if (innerComments) yield* innerComments\n      }\n      if (!kind || kind === 'trailing') {\n        const { trailingComments } = node\n        if (trailingComments) yield* trailingComments\n      }\n    }\n  }\n}\n"],"mappings":";AACA,SAASA,OAAT,QAAwB,oBAAxB;AACA,OAAO,KAAKC,aAAZ,MAA+B,eAA/B;;AAEA,OAAO,KAAKC,YAAZ,MAA8B,cAA9B;AACA,OAAO,KAAKC,gBAAZ,MAAkC,kBAAlC;;AAEA,OAAOC,aAAP,MAA0B,iBAA1B;;AAEA,OAAOC,OAAP,MAAoB,WAApB;AACA,OAAOC,kBAAP,MAA+B,4BAA/B;AACA,SAASC,qBAAT,QAAsC,+BAAtC;;;;;;;;;AASA,eAAe,MAAMC,YAAN,SAA2BR,OAA3B,CAAyC;EAC7CS,CAAC;EACDC,KAAK;EACLC,eAAe;EACfC,eAAe;EACfC,SAAS;EACTC,QAAQ;EACRC,QAAQ;EACRC,QAAQ;;;;;EAKjBC,WAAW,CAAC;IACVC,MAAM,GAAGjB,aADC;IAEVkB,aAFU;IAGVN,SAAS,GAAGV,gBAHF;IAIViB,KAAK,GAAGlB,YAJE;IAKVmB,cALU;;;;;;;EAYR,EAZO,EAYH;IACN;;IAEA,MAAMZ,CAAC,GAAGL,aAAa,CAACgB,KAAD,CAAvB;;IAEA,KAAKX,CAAL,GAASA,CAAT;IACA,KAAKC,KAAL,GAAa,CAACY,IAAD;IACXf,qBAAqB,CAACW,MAAM,CAACR,KAAP,CAAaY,IAAb,EAAmBH,aAAnB,CAAD,EAAoCG,IAApC,CADvB;IAEA,KAAKX,eAAL,GAAuB,CAACW,IAAD;IACrBJ,MAAM,CAACP,eAAP,CAAuBW,IAAvB,EAA6BH,aAA7B,CADF;IAEA,KAAKP,eAAL,GAAuB,CAACU,IAAD,KAAkB;MACvC,MAAMC,GAAG,GAAG,KAAKb,KAAL,CAAWY,IAAX,CAAZ;MACA,IAAIC,GAAG,CAACC,IAAJ,KAAa,MAAjB,EAAyB;QACvB,MAAM,IAAIC,KAAJ,CAAW,yBAAX,CAAN;MACD;MACD,OAAOF,GAAG,CAACG,OAAJ,CAAYC,IAAnB;IACD,CAND;IAOA,KAAKd,SAAL,GAAiBA,SAAjB;IACA,KAAKC,QAAL;IACEO,cAAc,KAAK,eAAnB;IACI,CAACO,IAAD,KAAgB;MACdtB,kBAAkB,CAAC,KAAKG,CAAN,EAAS,IAAIA,CAAC,CAACoB,QAAN,CAAeD,IAAf,CAAT,CAAlB;MACA,OAAOvB,OAAO,CAAC,KAAKQ,SAAN,EAAiBe,IAAjB,CAAd;IACD,CAJL;IAKIf,SAAS,CAACiB,OANhB;IAOA,KAAKf,QAAL,GAAgB,CAACa,IAAD,kIAAiB;QAC/BG,KAAK,EAAEH,IAAI,CAACG,KADmB;QAE/BC,GAAG,EAAEJ,IAAI,CAACI,GAFqB;QAG/BC,SAAS,eAAEL,IAAI,CAACM,GAAP,iEAAE,UAAUH,KAAZ,oDAAE,gBAAiBI,IAHG;QAI/BC,WAAW,gBAAER,IAAI,CAACM,GAAP,mEAAE,WAAUH,KAAZ,qDAAE,iBAAiBM,MAJC;QAK/BC,OAAO,gBAAEV,IAAI,CAACM,GAAP,iEAAE,WAAUF,GAAZ,mDAAE,eAAeG,IALO;QAM/BI,SAAS,gBAAEX,IAAI,CAACM,GAAP,iEAAE,WAAUF,GAAZ,mDAAE,eAAeK,MANK,EAAjB,EAAhB;;IAQA,KAAKrB,QAAL,GAAgB,UAAUA,QAAV;IACdY,IADc;IAEdY,IAFc;IAGK;MACnB,IAAI,CAACA,IAAD,IAASA,IAAI,KAAK,SAAtB,EAAiC;QAC/B,MAAM,EAAEC,eAAF,KAAsBb,IAA5B;QACA,IAAIa,eAAJ,EAAqB,OAAOA,eAAP;MACtB;MACD,IAAI,CAACD,IAAD,IAASA,IAAI,KAAK,OAAtB,EAA+B;QAC7B,MAAM,EAAEE,aAAF,KAAoBd,IAA1B;QACA,IAAIc,aAAJ,EAAmB,OAAOA,aAAP;MACpB;MACD,IAAI,CAACF,IAAD,IAASA,IAAI,KAAK,UAAtB,EAAkC;QAChC,MAAM,EAAEG,gBAAF,KAAuBf,IAA7B;QACA,IAAIe,gBAAJ,EAAsB,OAAOA,gBAAP;MACvB;IACF,CAhBD;EAiBD,CA3EqD"}