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50 lines
2.1 KiB
50 lines
2.1 KiB
7 years ago
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const fs = require('fs')
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const { SourceMapConsumer } = require('source-map')
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//
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// Utility to help check if sourcemaps are working
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//
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// searches `dist/chrome/inpage.js` for "new Error" statements
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// and prints their source lines using the sourcemaps.
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// if not working it may error or print minified garbage
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//
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start()
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async function start() {
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const rawBuild = fs.readFileSync(__dirname + '/../dist/chrome/inpage.js', 'utf8')
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const rawSourceMap = fs.readFileSync(__dirname + '/../dist/sourcemaps/inpage.js.map', 'utf8')
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const consumer = await new SourceMapConsumer(rawSourceMap)
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console.log('hasContentsOfAllSources:', consumer.hasContentsOfAllSources(), '\n')
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console.log('sources:')
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consumer.sources.map((sourcePath) => console.log(sourcePath))
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console.log('\nexamining "new Error" statements:\n')
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const sourceLines = rawBuild.split('\n')
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sourceLines.map(line => indicesOf('new Error', line))
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.forEach((errorIndices, lineIndex) => {
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// if (errorIndex === null) return console.log('line does not contain "new Error"')
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errorIndices.forEach((errorIndex) => {
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const position = { line: lineIndex + 1, column: errorIndex }
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const result = consumer.originalPositionFor(position)
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if (!result.source) return console.warn(`!! missing source for position: ${position}`)
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// filter out deps distributed minified without sourcemaps
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if (result.source === 'node_modules/browserify/node_modules/browser-pack/_prelude.js') return // minified mess
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if (result.source === 'node_modules/web3/dist/web3.min.js') return // minified mess
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const sourceContent = consumer.sourceContentFor(result.source)
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const sourceLines = sourceContent.split('\n')
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const line = sourceLines[result.line-1]
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console.log(`\n========================== ${result.source} ====================================\n`)
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console.log(line)
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console.log(`\n==============================================================================\n`)
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})
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})
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}
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function indicesOf(substring, string) {
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var a=[],i=-1;
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while((i=string.indexOf(substring,i+1)) >= 0) a.push(i);
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return a;
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}
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