microsoft/vscode-react-native
Publicmirrored from https://github.com/microsoft/vscode-react-nativeAvailable
src/debugger/scriptImporter.ts
109lines · modeblame
3fb37ad5unknown10 years ago | 1 | import fs = require("fs"); |
| 2 | import http = require("http"); | |
bedf110funknown10 years ago | 3 | import {Log} from "../utils/commands/log"; |
3fb37ad5unknown10 years ago | 4 | import path = require("path"); |
| 5 | import Q = require("q"); | |
| 6 | import request = require("request"); | |
| 7 | import url = require("url"); | |
| 8 | import vm = require("vm"); | |
| 9 | | |
| 10 | interface ISourceMap { | |
| 11 | file: string; | |
| 12 | sources: string[]; | |
| 13 | version: number; | |
| 14 | names: string[]; | |
| 15 | mappings: string; | |
| 16 | sourceRoot?: string; | |
| 17 | sourcesContent?: string[]; | |
| 18 | } | |
| 19 | | |
| 20 | export class ScriptImporter { | |
| 21 | private projectRootPath: string; | |
| 22 | private bundleFolderPath: string; | |
| 23 | | |
| 24 | constructor(projectRootPath: string) { | |
| 25 | this.projectRootPath = projectRootPath; | |
| 26 | // We put the source code inside the workspace, because VS Code doesn't seem to support source mapping if we don't do that | |
| 27 | this.bundleFolderPath = path.join(this.projectRootPath, ".vscode"); | |
| 28 | } | |
| 29 | | |
| 30 | private fixSourceMap(sourceMapBody: string, generatedCodeFilePath: string): string { | |
| 31 | try { | |
| 32 | let sourceMap = <ISourceMap> JSON.parse(sourceMapBody); | |
| 33 | sourceMap.sources = sourceMap.sources.map(source => { | |
| 34 | // Make all paths relative to the location of the source map | |
| 35 | let relativeSourcePath = path.relative(this.bundleFolderPath, source); | |
| 36 | let sourceUrl = relativeSourcePath.replace(/\\/g, "/"); | |
| 37 | return sourceUrl; | |
| 38 | }); | |
| 39 | // fixedSourceMapBody.sourceRoot = ".."; | |
| 40 | delete sourceMap.sourcesContent; | |
| 41 | sourceMap.sourceRoot = ""; | |
| 42 | sourceMap.file = generatedCodeFilePath; | |
| 43 | return JSON.stringify(sourceMap); | |
| 44 | } catch (exception) { | |
| 45 | return sourceMapBody; | |
| 46 | } | |
| 47 | } | |
| 48 | | |
| 49 | public import(scriptUrl: string): Q.Promise<void> { | |
| 50 | | |
| 51 | // We'll get the source code, and store it locally to have a better debugging experience | |
| 52 | return this.request(scriptUrl).then(scriptBody => { | |
| 53 | // Extract sourceMappingURL from body | |
| 54 | let parsedUrl = url.parse(scriptUrl); // scriptUrl = "http://localhost:8081/index.ios.bundle?platform=ios&dev=true" | |
| 55 | let sourceMappingRelativeUrl = this.sourceMapRelativeUrl(scriptBody); // sourceMappingRelativeUrl = "/index.ios.map?platform=ios&dev=true" | |
| 56 | let sourceMappingUrl = parsedUrl.protocol + "//" + parsedUrl.host + sourceMappingRelativeUrl; // sourceMappingUrl = "http://localhost:8081/index.ios.map?platform=ios&dev=true" | |
| 57 | | |
| 58 | // We'll get the source map, and story it locally, so we can debug the original files instead of the bundle | |
| 59 | return this.request(sourceMappingUrl).then(sourceMapBody => { | |
| 60 | let sourceMappingRelativePath = url.parse(sourceMappingRelativeUrl).pathname.substr(1); // sourceMappingRelativePath = "index.ios.map?platform=ios&dev=true" | |
| 61 | let sourceMappingLocalPath = path.join(this.bundleFolderPath, sourceMappingRelativePath); // sourceMappingLocalPath = "$TMPDIR/index.ios.map?platform=ios&dev=true" | |
| 62 | let scriptFileRelativePath = path.basename(parsedUrl.pathname); // scriptFileRelativePath = "index.ios.bundle" | |
| 63 | this.writeTemporaryFileSync(sourceMappingLocalPath, this.fixSourceMap(sourceMapBody, scriptFileRelativePath)); | |
| 64 | // Update the body with the new location of the source map on storage | |
| 65 | scriptBody = scriptBody.replace(/^\/\/# sourceMappingURL=(.*)$/m, "//# sourceMappingURL=" + sourceMappingRelativePath); | |
| 66 | }).then(() => { // TODO: Figure out how to handle the case that the source mapping fails. | |
| 67 | let scriptFilePath = path.join(this.bundleFolderPath, parsedUrl.pathname); // scriptFilePath = "$TMPDIR/index.ios.bundle" | |
| 68 | this.writeTemporaryFileSync(scriptFilePath, scriptBody); | |
| 69 | | |
| 70 | // The next line converts to any due to the incorrect typing on node.d.ts of vm.runInThisContext | |
| 71 | vm.runInThisContext(scriptBody, <any>{ filename: scriptFilePath }); | |
bedf110funknown10 years ago | 72 | Log.logMessage("Imported script at " + scriptUrl + " locally stored on " + this.bundleFolderPath); |
3fb37ad5unknown10 years ago | 73 | }); |
| 74 | }); | |
| 75 | } | |
| 76 | | |
| 77 | private writeTemporaryFileSync(filename: string, data: string) { | |
| 78 | fs.writeFileSync(filename, data); | |
| 79 | this.scheduleTemporaryFileCleanUp(filename); | |
| 80 | } | |
| 81 | private scheduleTemporaryFileCleanUp(filename: string) { | |
| 82 | process.on("exit", function (){ | |
| 83 | fs.unlinkSync(filename); | |
bedf110funknown10 years ago | 84 | Log.logMessage("Succesfully cleaned temporary file: " + filename); |
3fb37ad5unknown10 years ago | 85 | }); |
| 86 | } | |
| 87 | | |
| 88 | private sourceMapRelativeUrl(body: any) { | |
| 89 | let match = body.match(/^\/\/# sourceMappingURL=(.*)$/m); | |
| 90 | // If match is null, the body doesn't contain the source map | |
| 91 | return match ? match[1] : null; | |
| 92 | } | |
| 93 | | |
| 94 | private request(uri: string): Q.Promise<any> { | |
| 95 | let result = Q.defer<any>(); | |
| 96 | request(uri, function (error: any, response: http.IncomingMessage, body: any) { | |
| 97 | if (!error) { | |
| 98 | if (response.statusCode === 200) { | |
| 99 | result.resolve(body); | |
| 100 | } else { | |
| 101 | result.reject(body); | |
| 102 | } | |
| 103 | } else { | |
| 104 | result.reject(error); | |
| 105 | } | |
| 106 | }); | |
| 107 | return result.promise; | |
| 108 | } | |
| 109 | } |