mirror of
https://github.com/denoland/deno.git
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279 lines
8.5 KiB
TypeScript
279 lines
8.5 KiB
TypeScript
// Copyright 2014 Evan Wallace
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// Copyright 2018 the Deno authors. All rights reserved. MIT license.
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// Originated from source-map-support but has been heavily modified for deno.
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import { SourceMapConsumer, MappedPosition } from "source-map";
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import * as base64 from "base64-js";
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import { arrayToStr } from "./util";
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import { CallSite, RawSourceMap } from "./types";
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const consumers = new Map<string, SourceMapConsumer>();
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interface Options {
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// A callback the returns generated file contents.
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getGeneratedContents: GetGeneratedContentsCallback;
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// Usually set the following to true. Set to false for testing.
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installPrepareStackTrace: boolean;
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}
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interface Position {
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source: string; // Filename
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column: number;
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line: number;
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}
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type GetGeneratedContentsCallback = (fileName: string) => string | RawSourceMap;
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let getGeneratedContents: GetGeneratedContentsCallback;
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// @internal
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export function install(options: Options) {
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getGeneratedContents = options.getGeneratedContents;
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if (options.installPrepareStackTrace) {
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Error.prepareStackTrace = prepareStackTraceWrapper;
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}
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}
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// @internal
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export function prepareStackTraceWrapper(
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error: Error,
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stack: CallSite[]
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): string {
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try {
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return prepareStackTrace(error, stack);
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} catch (prepareStackError) {
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Error.prepareStackTrace = undefined;
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console.log("=====Error inside of prepareStackTrace====");
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console.log(prepareStackError.stack.toString());
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console.log("=====Original error=======================");
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throw error;
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}
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}
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// @internal
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export function prepareStackTrace(error: Error, stack: CallSite[]): string {
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const frames = stack.map(
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(frame: CallSite) => `\n at ${wrapCallSite(frame).toString()}`
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);
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return error.toString() + frames.join("");
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}
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// @internal
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export function wrapCallSite(frame: CallSite): CallSite {
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if (frame.isNative()) {
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return frame;
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}
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// Most call sites will return the source file from getFileName(), but code
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// passed to eval() ending in "//# sourceURL=..." will return the source file
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// from getScriptNameOrSourceURL() instead
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const source = frame.getFileName() || frame.getScriptNameOrSourceURL();
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if (source) {
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const line = frame.getLineNumber() || 0;
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const column = (frame.getColumnNumber() || 1) - 1;
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const position = mapSourcePosition({ source, line, column });
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frame = cloneCallSite(frame);
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frame.getFileName = () => position.source;
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frame.getLineNumber = () => position.line;
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frame.getColumnNumber = () => Number(position.column) + 1;
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frame.getScriptNameOrSourceURL = () => position.source;
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frame.toString = () => CallSiteToString(frame);
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return frame;
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}
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// Code called using eval() needs special handling
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let origin = (frame.isEval() && frame.getEvalOrigin()) || undefined;
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if (origin) {
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origin = mapEvalOrigin(origin);
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frame = cloneCallSite(frame);
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frame.getEvalOrigin = () => origin;
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return frame;
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}
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// If we get here then we were unable to change the source position
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return frame;
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}
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function cloneCallSite(frame: CallSite): CallSite {
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// tslint:disable:no-any
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const obj: any = {};
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const frame_ = frame as any;
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const props = Object.getOwnPropertyNames(Object.getPrototypeOf(frame));
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props.forEach(name => {
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obj[name] = /^(?:is|get)/.test(name)
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? () => frame_[name].call(frame)
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: frame_[name];
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});
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return (obj as any) as CallSite;
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// tslint:enable:no-any
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}
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// Taken from source-map-support, original copied from V8's messages.js
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// MIT License. Copyright (c) 2014 Evan Wallace
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function CallSiteToString(frame: CallSite): string {
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let fileName;
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let fileLocation = "";
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if (frame.isNative()) {
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fileLocation = "native";
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} else {
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fileName = frame.getScriptNameOrSourceURL();
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if (!fileName && frame.isEval()) {
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fileLocation = frame.getEvalOrigin() || "";
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fileLocation += ", "; // Expecting source position to follow.
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}
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if (fileName) {
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fileLocation += fileName;
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} else {
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// Source code does not originate from a file and is not native, but we
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// can still get the source position inside the source string, e.g. in
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// an eval string.
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fileLocation += "<anonymous>";
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}
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const lineNumber = frame.getLineNumber();
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if (lineNumber != null) {
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fileLocation += ":" + String(lineNumber);
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const columnNumber = frame.getColumnNumber();
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if (columnNumber) {
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fileLocation += ":" + String(columnNumber);
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}
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}
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}
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let line = "";
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const functionName = frame.getFunctionName();
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let addSuffix = true;
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const isConstructor = frame.isConstructor();
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const isMethodCall = !(frame.isToplevel() || isConstructor);
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if (isMethodCall) {
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let typeName = frame.getTypeName();
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// Fixes shim to be backward compatable with Node v0 to v4
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if (typeName === "[object Object]") {
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typeName = "null";
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}
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const methodName = frame.getMethodName();
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if (functionName) {
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if (typeName && functionName.indexOf(typeName) !== 0) {
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line += typeName + ".";
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}
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line += functionName;
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if (
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methodName &&
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functionName.indexOf("." + methodName) !==
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functionName.length - methodName.length - 1
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) {
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line += ` [as ${methodName} ]`;
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}
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} else {
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line += `${typeName}.${methodName || "<anonymous>"}`;
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}
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} else if (isConstructor) {
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line += `new ${functionName || "<anonymous>"}`;
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} else if (functionName) {
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line += functionName;
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} else {
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line += fileLocation;
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addSuffix = false;
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}
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if (addSuffix) {
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line += ` (${fileLocation})`;
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}
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return line;
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}
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// Regex for detecting source maps
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const reSourceMap = /^data:application\/json[^,]+base64,/;
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function loadConsumer(source: string): SourceMapConsumer | null {
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let consumer = consumers.get(source);
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if (consumer == null) {
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const code = getGeneratedContents(source);
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if (!code) {
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return null;
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}
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if (typeof code !== "string") {
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throw new Error("expected string");
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}
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let sourceMappingURL = retrieveSourceMapURL(code);
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if (!sourceMappingURL) {
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throw Error("No source map?");
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}
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let sourceMapData: string | RawSourceMap;
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if (reSourceMap.test(sourceMappingURL)) {
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// Support source map URL as a data url
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const rawData = sourceMappingURL.slice(sourceMappingURL.indexOf(",") + 1);
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const ui8 = base64.toByteArray(rawData);
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sourceMapData = arrayToStr(ui8);
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sourceMappingURL = source;
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} else {
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// Support source map URLs relative to the source URL
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//sourceMappingURL = supportRelativeURL(source, sourceMappingURL);
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sourceMapData = getGeneratedContents(sourceMappingURL);
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}
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const rawSourceMap =
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typeof sourceMapData === "string"
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? JSON.parse(sourceMapData)
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: sourceMapData;
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//console.log("sourceMapData", sourceMapData);
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consumer = new SourceMapConsumer(rawSourceMap);
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consumers.set(source, consumer);
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}
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return consumer;
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}
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function retrieveSourceMapURL(fileData: string): string | null {
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// Get the URL of the source map
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// tslint:disable-next-line:max-line-length
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const re = /(?:\/\/[@#][ \t]+sourceMappingURL=([^\s'"]+?)[ \t]*$)|(?:\/\*[@#][ \t]+sourceMappingURL=([^\*]+?)[ \t]*(?:\*\/)[ \t]*$)/gm;
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// Keep executing the search to find the *last* sourceMappingURL to avoid
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// picking up sourceMappingURLs from comments, strings, etc.
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let lastMatch, match;
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while ((match = re.exec(fileData))) {
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lastMatch = match;
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}
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if (!lastMatch) {
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return null;
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}
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return lastMatch[1];
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}
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function mapSourcePosition(position: Position): MappedPosition {
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const consumer = loadConsumer(position.source);
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if (consumer == null) {
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return position;
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}
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return consumer.originalPositionFor(position);
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}
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// Parses code generated by FormatEvalOrigin(), a function inside V8:
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// https://code.google.com/p/v8/source/browse/trunk/src/messages.js
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function mapEvalOrigin(origin: string): string {
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// Most eval() calls are in this format
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let match = /^eval at ([^(]+) \((.+):(\d+):(\d+)\)$/.exec(origin);
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if (match) {
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const position = mapSourcePosition({
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source: match[2],
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line: Number(match[3]),
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column: Number(match[4]) - 1
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});
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const pos = [
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position.source,
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position.line,
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Number(position.column) + 1
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].join(":");
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return `eval at ${match[1]} (${pos})`;
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}
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// Parse nested eval() calls using recursion
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match = /^eval at ([^(]+) \((.+)\)$/.exec(origin);
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if (match) {
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return `eval at ${match[1]} (${mapEvalOrigin(match[2])})`;
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}
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// Make sure we still return useful information if we didn't find anything
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return origin;
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}
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