diff options
Diffstat (limited to 'node_modules/@babel/helpers/lib/index.js')
| -rw-r--r-- | node_modules/@babel/helpers/lib/index.js | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/node_modules/@babel/helpers/lib/index.js b/node_modules/@babel/helpers/lib/index.js new file mode 100644 index 00000000..f60b67c8 --- /dev/null +++ b/node_modules/@babel/helpers/lib/index.js @@ -0,0 +1,293 @@ +"use strict"; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.get = get; +exports.getDependencies = getDependencies; +exports.default = exports.list = void 0; + +function _traverse() { + const data = _interopRequireDefault(require("@babel/traverse")); + + _traverse = function _traverse() { + return data; + }; + + return data; +} + +function t() { + const data = _interopRequireWildcard(require("@babel/types")); + + t = function t() { + return data; + }; + + return data; +} + +var _helpers = _interopRequireDefault(require("./helpers")); + +function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } } + +function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + +function makePath(path) { + const parts = []; + + for (; path.parentPath; path = path.parentPath) { + parts.push(path.key); + if (path.inList) parts.push(path.listKey); + } + + return parts.reverse().join("."); +} + +function getHelperMetadata(file) { + const globals = new Set(); + const localBindingNames = new Set(); + const dependencies = new Map(); + let exportName; + let exportPath; + const exportBindingAssignments = []; + const importPaths = []; + const importBindingsReferences = []; + (0, _traverse().default)(file, { + ImportDeclaration(child) { + const name = child.node.source.value; + + if (!_helpers.default[name]) { + throw child.buildCodeFrameError(`Unknown helper ${name}`); + } + + if (child.get("specifiers").length !== 1 || !child.get("specifiers.0").isImportDefaultSpecifier()) { + throw child.buildCodeFrameError("Helpers can only import a default value"); + } + + const bindingIdentifier = child.node.specifiers[0].local; + dependencies.set(bindingIdentifier, name); + importPaths.push(makePath(child)); + }, + + ExportDefaultDeclaration(child) { + const decl = child.get("declaration"); + + if (decl.isFunctionDeclaration()) { + if (!decl.node.id) { + throw decl.buildCodeFrameError("Helpers should give names to their exported func declaration"); + } + + exportName = decl.node.id.name; + } + + exportPath = makePath(child); + }, + + ExportAllDeclaration(child) { + throw child.buildCodeFrameError("Helpers can only export default"); + }, + + ExportNamedDeclaration(child) { + throw child.buildCodeFrameError("Helpers can only export default"); + }, + + Statement(child) { + if (child.isModuleDeclaration()) return; + child.skip(); + } + + }); + (0, _traverse().default)(file, { + Program(path) { + const bindings = path.scope.getAllBindings(); + Object.keys(bindings).forEach(name => { + if (name === exportName) return; + if (dependencies.has(bindings[name].identifier)) return; + localBindingNames.add(name); + }); + }, + + ReferencedIdentifier(child) { + const name = child.node.name; + const binding = child.scope.getBinding(name, true); + + if (!binding) { + globals.add(name); + } else if (dependencies.has(binding.identifier)) { + importBindingsReferences.push(makePath(child)); + } + }, + + AssignmentExpression(child) { + const left = child.get("left"); + if (!(exportName in left.getBindingIdentifiers())) return; + + if (!left.isIdentifier()) { + throw left.buildCodeFrameError("Only simple assignments to exports are allowed in helpers"); + } + + const binding = child.scope.getBinding(exportName); + + if (binding && binding.scope.path.isProgram()) { + exportBindingAssignments.push(makePath(child)); + } + } + + }); + if (!exportPath) throw new Error("Helpers must default-export something."); + exportBindingAssignments.reverse(); + return { + globals: Array.from(globals), + localBindingNames: Array.from(localBindingNames), + dependencies, + exportBindingAssignments, + exportPath, + exportName, + importBindingsReferences, + importPaths + }; +} + +function permuteHelperAST(file, metadata, id, localBindings, getDependency) { + if (localBindings && !id) { + throw new Error("Unexpected local bindings for module-based helpers."); + } + + if (!id) return; + const localBindingNames = metadata.localBindingNames, + dependencies = metadata.dependencies, + exportBindingAssignments = metadata.exportBindingAssignments, + exportPath = metadata.exportPath, + exportName = metadata.exportName, + importBindingsReferences = metadata.importBindingsReferences, + importPaths = metadata.importPaths; + const dependenciesRefs = {}; + dependencies.forEach((name, id) => { + dependenciesRefs[id.name] = typeof getDependency === "function" && getDependency(name) || id; + }); + const toRename = {}; + const bindings = new Set(localBindings || []); + localBindingNames.forEach(name => { + let newName = name; + + while (bindings.has(newName)) newName = "_" + newName; + + if (newName !== name) toRename[name] = newName; + }); + + if (id.type === "Identifier" && exportName !== id.name) { + toRename[exportName] = id.name; + } + + (0, _traverse().default)(file, { + Program(path) { + const exp = path.get(exportPath); + const imps = importPaths.map(p => path.get(p)); + const impsBindingRefs = importBindingsReferences.map(p => path.get(p)); + const decl = exp.get("declaration"); + + if (id.type === "Identifier") { + if (decl.isFunctionDeclaration()) { + exp.replaceWith(decl); + } else { + exp.replaceWith(t().variableDeclaration("var", [t().variableDeclarator(id, decl.node)])); + } + } else if (id.type === "MemberExpression") { + if (decl.isFunctionDeclaration()) { + exportBindingAssignments.forEach(assignPath => { + const assign = path.get(assignPath); + assign.replaceWith(t().assignmentExpression("=", id, assign.node)); + }); + exp.replaceWith(decl); + path.pushContainer("body", t().expressionStatement(t().assignmentExpression("=", id, t().identifier(exportName)))); + } else { + exp.replaceWith(t().expressionStatement(t().assignmentExpression("=", id, decl.node))); + } + } else { + throw new Error("Unexpected helper format."); + } + + Object.keys(toRename).forEach(name => { + path.scope.rename(name, toRename[name]); + }); + + for (var _iterator = imps, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) { + var _ref; + + if (_isArray) { + if (_i >= _iterator.length) break; + _ref = _iterator[_i++]; + } else { + _i = _iterator.next(); + if (_i.done) break; + _ref = _i.value; + } + + const path = _ref; + path.remove(); + } + + for (var _iterator2 = impsBindingRefs, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : _iterator2[Symbol.iterator]();;) { + var _ref2; + + if (_isArray2) { + if (_i2 >= _iterator2.length) break; + _ref2 = _iterator2[_i2++]; + } else { + _i2 = _iterator2.next(); + if (_i2.done) break; + _ref2 = _i2.value; + } + + const path = _ref2; + const node = t().cloneNode(dependenciesRefs[path.node.name]); + path.replaceWith(node); + } + + path.stop(); + } + + }); +} + +const helperData = {}; + +function loadHelper(name) { + if (!helperData[name]) { + if (!_helpers.default[name]) throw new ReferenceError(`Unknown helper ${name}`); + + const fn = () => { + return t().file(_helpers.default[name]()); + }; + + const metadata = getHelperMetadata(fn()); + helperData[name] = { + build(getDependency, id, localBindings) { + const file = fn(); + permuteHelperAST(file, metadata, id, localBindings, getDependency); + return { + nodes: file.program.body, + globals: metadata.globals + }; + }, + + dependencies: metadata.dependencies + }; + } + + return helperData[name]; +} + +function get(name, getDependency, id, localBindings) { + return loadHelper(name).build(getDependency, id, localBindings); +} + +function getDependencies(name) { + return Array.from(loadHelper(name).dependencies.values()); +} + +const list = Object.keys(_helpers.default).map(name => name.replace(/^_/, "")).filter(name => name !== "__esModule"); +exports.list = list; +var _default = get; +exports.default = _default;
\ No newline at end of file |