85 lines
2.8 KiB
JavaScript
85 lines
2.8 KiB
JavaScript
import fs from 'fs/promises';
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import path from 'path';
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import url from 'url';
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import dataUriToBuffer from 'next/dist/compiled/data-uri-to-buffer';
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function getSourceMapUrl(fileContents) {
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const regex = /\/\/[#@] ?sourceMappingURL=([^\s'"]+)\s*$/gm;
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let match = null;
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for(;;){
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let next = regex.exec(fileContents);
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if (next == null) {
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break;
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}
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match = next;
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}
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if (!(match && match[1])) {
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return null;
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}
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return match[1].toString();
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}
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export async function getSourceMapFromFile(filename) {
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filename = filename.startsWith('file://') ? url.fileURLToPath(filename) : filename;
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let fileContents;
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try {
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fileContents = await fs.readFile(filename, 'utf-8');
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} catch (error) {
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throw Object.defineProperty(new Error(`Failed to read file contents of ${filename}.`, {
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cause: error
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}), "__NEXT_ERROR_CODE", {
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value: "E466",
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enumerable: false,
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configurable: true
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});
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}
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const sourceUrl = getSourceMapUrl(fileContents);
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if (!sourceUrl) {
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return undefined;
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}
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if (sourceUrl.startsWith('data:')) {
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let buffer;
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try {
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buffer = dataUriToBuffer(sourceUrl);
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} catch (error) {
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throw Object.defineProperty(new Error(`Failed to parse source map URL for ${filename}.`, {
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cause: error
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}), "__NEXT_ERROR_CODE", {
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value: "E199",
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enumerable: false,
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configurable: true
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});
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}
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if (buffer.type !== 'application/json') {
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throw Object.defineProperty(new Error(`Unknown source map type for ${filename}: ${buffer.typeFull}.`), "__NEXT_ERROR_CODE", {
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value: "E113",
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enumerable: false,
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configurable: true
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});
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}
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try {
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return JSON.parse(buffer.toString());
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} catch (error) {
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throw Object.defineProperty(new Error(`Failed to parse source map for ${filename}.`, {
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cause: error
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}), "__NEXT_ERROR_CODE", {
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value: "E318",
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enumerable: false,
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configurable: true
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});
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}
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}
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const sourceMapFilename = path.resolve(path.dirname(filename), decodeURIComponent(sourceUrl));
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try {
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const sourceMapContents = await fs.readFile(sourceMapFilename, 'utf-8');
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return JSON.parse(sourceMapContents.toString());
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} catch (error) {
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throw Object.defineProperty(new Error(`Failed to parse source map ${sourceMapFilename}.`, {
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cause: error
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}), "__NEXT_ERROR_CODE", {
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value: "E220",
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enumerable: false,
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configurable: true
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});
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}
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}
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//# sourceMappingURL=get-source-map-from-file.js.map
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