/* @flow */
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const SourceMapConsumer = require('source-map').SourceMapConsumer
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const filenameRE = /\(([^)]+\.js):(\d+):(\d+)\)$/
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export function createSourceMapConsumers (rawMaps: Object) {
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const maps = {}
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Object.keys(rawMaps).forEach(file => {
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maps[file] = new SourceMapConsumer(rawMaps[file])
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})
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return maps
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}
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export function rewriteErrorTrace (e: any, mapConsumers: {
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[key: string]: SourceMapConsumer
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}) {
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if (e && typeof e.stack === 'string') {
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e.stack = e.stack.split('\n').map(line => {
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return rewriteTraceLine(line, mapConsumers)
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}).join('\n')
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}
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}
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function rewriteTraceLine (trace: string, mapConsumers: {
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[key: string]: SourceMapConsumer
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}) {
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const m = trace.match(filenameRE)
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const map = m && mapConsumers[m[1]]
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if (m != null && map) {
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const originalPosition = map.originalPositionFor({
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line: Number(m[2]),
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column: Number(m[3])
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})
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if (originalPosition.source != null) {
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const { source, line, column } = originalPosition
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const mappedPosition = `(${source.replace(/^webpack:\/\/\//, '')}:${String(line)}:${String(column)})`
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return trace.replace(filenameRE, mappedPosition)
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} else {
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return trace
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}
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} else {
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return trace
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}
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}
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