{"version":3,"names":["helpers","data","require","_generator","_template","_t","arrayExpression","assignmentExpression","binaryExpression","blockStatement","callExpression","cloneNode","conditionalExpression","exportNamedDeclaration","exportSpecifier","expressionStatement","functionExpression","identifier","memberExpression","objectExpression","program","stringLiteral","unaryExpression","variableDeclaration","variableDeclarator","buildUmdWrapper","replacements","template","statement","buildGlobal","allowlist","namespace","body","container","tree","push","buildHelpers","buildModule","refs","unshift","Object","keys","map","name","buildUmd","FACTORY_PARAMETERS","BROWSER_ARGUMENTS","COMMON_ARGUMENTS","AMD_ARGUMENTS","FACTORY_BODY","UMD_ROOT","buildVar","getHelperReference","list","forEach","includes","ref","nodes","get","ast","exportName","mapExportBindingAssignments","node","_default","outputType","build","global","module","umd","var","Error","generator","code"],"sources":["../../src/tools/build-external-helpers.ts"],"sourcesContent":["import * as helpers from \"@babel/helpers\";\nimport generator from \"@babel/generator\";\nimport template from \"@babel/template\";\nimport {\n  arrayExpression,\n  assignmentExpression,\n  binaryExpression,\n  blockStatement,\n  callExpression,\n  cloneNode,\n  conditionalExpression,\n  exportNamedDeclaration,\n  exportSpecifier,\n  expressionStatement,\n  functionExpression,\n  identifier,\n  memberExpression,\n  objectExpression,\n  program,\n  stringLiteral,\n  unaryExpression,\n  variableDeclaration,\n  variableDeclarator,\n} from \"@babel/types\";\nimport type * as t from \"@babel/types\";\nimport type { Replacements } from \"@babel/template\";\n\n// Wrapped to avoid wasting time parsing this when almost no-one uses\n// build-external-helpers.\nconst buildUmdWrapper = (replacements: Replacements) =>\n  template.statement`\n    (function (root, factory) {\n      if (typeof define === \"function\" && define.amd) {\n        define(AMD_ARGUMENTS, factory);\n      } else if (typeof exports === \"object\") {\n        factory(COMMON_ARGUMENTS);\n      } else {\n        factory(BROWSER_ARGUMENTS);\n      }\n    })(UMD_ROOT, function (FACTORY_PARAMETERS) {\n      FACTORY_BODY\n    });\n  `(replacements);\n\nfunction buildGlobal(allowlist?: Array<string>) {\n  const namespace = identifier(\"babelHelpers\");\n\n  const body: t.Statement[] = [];\n  const container = functionExpression(\n    null,\n    [identifier(\"global\")],\n    blockStatement(body),\n  );\n  const tree = program([\n    expressionStatement(\n      callExpression(container, [\n        // typeof global === \"undefined\" ? self : global\n        conditionalExpression(\n          binaryExpression(\n            \"===\",\n            unaryExpression(\"typeof\", identifier(\"global\")),\n            stringLiteral(\"undefined\"),\n          ),\n          identifier(\"self\"),\n          identifier(\"global\"),\n        ),\n      ]),\n    ),\n  ]);\n\n  body.push(\n    variableDeclaration(\"var\", [\n      variableDeclarator(\n        namespace,\n        assignmentExpression(\n          \"=\",\n          memberExpression(identifier(\"global\"), namespace),\n          objectExpression([]),\n        ),\n      ),\n    ]),\n  );\n\n  buildHelpers(body, namespace, allowlist);\n\n  return tree;\n}\n\nfunction buildModule(allowlist?: Array<string>) {\n  const body: t.Statement[] = [];\n  const refs = buildHelpers(body, null, allowlist);\n\n  body.unshift(\n    exportNamedDeclaration(\n      null,\n      Object.keys(refs).map(name => {\n        return exportSpecifier(cloneNode(refs[name]), identifier(name));\n      }),\n    ),\n  );\n\n  return program(body, [], \"module\");\n}\n\nfunction buildUmd(allowlist?: Array<string>) {\n  const namespace = identifier(\"babelHelpers\");\n\n  const body: t.Statement[] = [];\n  body.push(\n    variableDeclaration(\"var\", [\n      variableDeclarator(namespace, identifier(\"global\")),\n    ]),\n  );\n\n  buildHelpers(body, namespace, allowlist);\n\n  return program([\n    buildUmdWrapper({\n      FACTORY_PARAMETERS: identifier(\"global\"),\n      BROWSER_ARGUMENTS: assignmentExpression(\n        \"=\",\n        memberExpression(identifier(\"root\"), namespace),\n        objectExpression([]),\n      ),\n      COMMON_ARGUMENTS: identifier(\"exports\"),\n      AMD_ARGUMENTS: arrayExpression([stringLiteral(\"exports\")]),\n      FACTORY_BODY: body,\n      UMD_ROOT: identifier(\"this\"),\n    }),\n  ]);\n}\n\nfunction buildVar(allowlist?: Array<string>) {\n  const namespace = identifier(\"babelHelpers\");\n\n  const body: t.Statement[] = [];\n  body.push(\n    variableDeclaration(\"var\", [\n      variableDeclarator(namespace, objectExpression([])),\n    ]),\n  );\n  const tree = program(body);\n  buildHelpers(body, namespace, allowlist);\n  body.push(expressionStatement(namespace));\n  return tree;\n}\n\nfunction buildHelpers(\n  body: t.Statement[],\n  namespace: t.Expression,\n  allowlist?: Array<string>,\n): Record<string, t.MemberExpression>;\nfunction buildHelpers(\n  body: t.Statement[],\n  namespace: null,\n  allowlist?: Array<string>,\n): Record<string, t.Identifier>;\n\nfunction buildHelpers(\n  body: t.Statement[],\n  namespace: t.Expression | null,\n  allowlist?: Array<string>,\n) {\n  const getHelperReference = (name: string) => {\n    return namespace\n      ? memberExpression(namespace, identifier(name))\n      : identifier(`_${name}`);\n  };\n\n  const refs: { [key: string]: t.Identifier | t.MemberExpression } = {};\n  helpers.list.forEach(function (name) {\n    if (allowlist && !allowlist.includes(name)) return;\n\n    const ref = (refs[name] = getHelperReference(name));\n\n    const { nodes } = helpers.get(\n      name,\n      getHelperReference,\n      namespace ? null : `_${name}`,\n      [],\n      namespace\n        ? (ast, exportName, mapExportBindingAssignments) => {\n            mapExportBindingAssignments(node =>\n              assignmentExpression(\"=\", ref, node),\n            );\n            ast.body.push(\n              expressionStatement(\n                assignmentExpression(\"=\", ref, identifier(exportName)),\n              ),\n            );\n          }\n        : null,\n    );\n\n    body.push(...nodes);\n  });\n  return refs;\n}\nexport default function (\n  allowlist?: Array<string>,\n  outputType: \"global\" | \"module\" | \"umd\" | \"var\" = \"global\",\n) {\n  let tree: t.Program;\n\n  const build = {\n    global: buildGlobal,\n    module: buildModule,\n    umd: buildUmd,\n    var: buildVar,\n  }[outputType];\n\n  if (build) {\n    tree = build(allowlist);\n  } else {\n    throw new Error(`Unsupported output type ${outputType}`);\n  }\n\n  return 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