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Support generating sourceMaps for source debugging (smogon#7797)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,129 @@ | ||
| "use strict"; | ||
|
|
||
| const {transform} = require("sucrase"); | ||
| const fs = require("fs"); | ||
| const path = require("path"); | ||
|
|
||
| function needsSucrase(source, dest, path = "") { | ||
| if (path.endsWith(".ts")) { | ||
| if (path.endsWith(".d.ts")) return false; | ||
| const sourceStat = fs.lstatSync(source + path); | ||
| try { | ||
| const destStat = fs.lstatSync(dest + path.slice(0, -2) + "js"); | ||
| return sourceStat.ctimeMs > destStat.ctimeMs; | ||
| } catch (e) { | ||
| // dest doesn't exist | ||
| return true; | ||
| } | ||
| } | ||
| if (!path.includes(".")) { | ||
| // probably dir | ||
| try { | ||
| const files = fs.readdirSync(source + path); | ||
| for (const file of files) { | ||
| if (needsSucrase(source, dest, path + "/" + file)) { | ||
| return true; | ||
| } | ||
| } | ||
| } catch (e) { | ||
| // not dir | ||
| } | ||
| return false; | ||
| } | ||
| return false; | ||
| } | ||
|
|
||
| // https://github.com/alangpierce/sucrase/blob/master/src/cli.ts | ||
| function findFiles(options) { | ||
| const outDirPath = options.outDirPath; | ||
| const srcDirPath = options.srcDirPath; | ||
| const pathToSource = options.pathToSource || ".."; | ||
|
|
||
| const extensions = options.sucraseOptions.transforms.includes("typescript") ? | ||
| [".ts", ".tsx"] : | ||
| [".js", ".jsx"]; | ||
|
|
||
| if (!fs.existsSync(outDirPath)) { | ||
| fs.mkdirSync(outDirPath); | ||
| } | ||
|
|
||
| const outArr = []; | ||
| for (const child of fs.readdirSync(srcDirPath)) { | ||
| if ( | ||
| ["node_modules", ".git"].includes(child) || | ||
| options.excludeDirs.includes(child) | ||
| ) { | ||
| continue; | ||
| } | ||
| const srcChildPath = path.join(srcDirPath, child); | ||
| const outChildPath = path.join(outDirPath, child); | ||
| const pathToSourceChild = path.join(pathToSource, ".."); | ||
| if (fs.statSync(srcChildPath).isDirectory()) { | ||
| const innerOptions = {...options}; | ||
| innerOptions.srcDirPath = srcChildPath; | ||
| innerOptions.outDirPath = outChildPath; | ||
| innerOptions.pathToSource = pathToSourceChild; | ||
| const innerFiles = findFiles(innerOptions); | ||
| outArr.push(...innerFiles); | ||
| } else if (extensions.some((ext) => srcChildPath.endsWith(ext))) { | ||
| const outPath = outChildPath.replace( | ||
| /\.\w+$/, | ||
| `.${options.outExtension}` | ||
| ); | ||
| outArr.push({ | ||
| srcPath: srcChildPath, | ||
| outPath, | ||
| pathToSource: pathToSource, | ||
| }); | ||
| } | ||
| } | ||
|
|
||
| if (!fs.existsSync(path.join(outDirPath, "sourceMaps"))) { | ||
| fs.mkdirSync(path.join(outDirPath, "sourceMaps")); | ||
| } | ||
|
|
||
| return outArr; | ||
| } | ||
|
|
||
| exports.sucrase = (force) => (src, out, opts, excludeDirs = []) => { | ||
| try { | ||
| if (!force && src !== "./config" && !needsSucrase(src, out)) { | ||
| return false; | ||
| } | ||
| } catch (e) {} | ||
| const sucraseOptions = { | ||
| transforms: ["typescript", "imports"], | ||
| enableLegacyTypeScriptModuleInterop: true, | ||
|
|
||
| ...opts, | ||
| }; | ||
| const files = findFiles({ | ||
| outDirPath: out, | ||
| srcDirPath: src, | ||
| sucraseOptions: sucraseOptions, | ||
| excludeDirs: ["sourceMaps", ...excludeDirs], | ||
| outExtension: "js", | ||
| }); | ||
| for (const file of files) { | ||
| const sucraseOptionsFile = { | ||
| ...sucraseOptions, | ||
| sourceMapOptions: {compiledFilename: file.outPath}, | ||
| filePath: path.join(file.pathToSource, file.srcPath), | ||
| }; | ||
| const code = fs.readFileSync(file.srcPath, "utf-8"); | ||
| const transformed = transform(code, sucraseOptionsFile); | ||
| transformed.code += `\n //# sourceMappingURL=sourceMaps/${path.basename( | ||
| file.outPath | ||
| )}.map`; | ||
| fs.writeFileSync( | ||
| path.join( | ||
| path.dirname(file.outPath), | ||
| "sourceMaps", | ||
| path.basename(`${file.outPath}.map`) | ||
| ), | ||
| JSON.stringify(transformed.sourceMap) | ||
| ); | ||
| fs.writeFileSync(file.outPath, transformed.code); | ||
| } | ||
| return true; | ||
| }; |
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