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33 lines
1.0 KiB
33 lines
1.0 KiB
const path = require('path') |
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const sourceMap = require('source-map') |
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const splitRE = /\r?\n/g |
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module.exports = function generateSourceMap (script, output, filePath, content, inputMap) { |
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var hashedFilename = path.basename(filePath) |
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var map = new sourceMap.SourceMapGenerator() |
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map.setSourceContent(hashedFilename, content) |
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// check input source map from babel/coffee etc |
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var inputMapConsumer = inputMap && new sourceMap.SourceMapConsumer(inputMap) |
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var generatedOffset = (output ? output.split(splitRE).length : 0) + 1 |
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script.split(splitRE).forEach(function (line, index) { |
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var ln = index + 1 |
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var originalLine = inputMapConsumer |
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? inputMapConsumer.originalPositionFor({ line: ln, column: 0 }).line |
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: ln |
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if (originalLine) { |
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map.addMapping({ |
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source: hashedFilename, |
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generated: { |
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line: ln + generatedOffset, |
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column: 0 |
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}, |
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original: { |
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line: originalLine, |
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column: 0 |
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} |
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}) |
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} |
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}) |
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map._hashedFilename = hashedFilename |
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return map |
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}
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