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{ | ||
"include": [] | ||
} |
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import { fromSource, fromMapFileSource } from "convert-source-map"; | ||
import { | ||
createInstrumenter, | ||
InstrumenterOptions, | ||
} from "istanbul-lib-instrument"; | ||
// @ts-expect-error no types | ||
import mergeSourceMap from "merge-source-map"; | ||
import { LoaderContext } from "webpack"; | ||
import fs from "fs"; | ||
import path from "path"; | ||
import { AddonOptionsWebpack } from "../types"; | ||
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||
export type Options = Partial<InstrumenterOptions> & AddonOptionsWebpack; | ||
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type RawSourceMap = { | ||
version: number; | ||
sources: string[]; | ||
mappings: string; | ||
file?: string; | ||
sourceRoot?: string; | ||
sourcesContent?: string[]; | ||
names?: string[]; | ||
}; | ||
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export const defaultOptions: Partial<InstrumenterOptions> = { | ||
preserveComments: true, | ||
produceSourceMap: true, | ||
autoWrap: true, | ||
esModules: true, | ||
compact: false, | ||
}; | ||
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export default function ( | ||
this: LoaderContext<Options>, | ||
source: string, | ||
sourceMap?: RawSourceMap | ||
) { | ||
let map = sourceMap; | ||
let options = Object.assign(defaultOptions, this.getOptions()); | ||
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// If there's no external sourceMap file, then check for an inline sourceMap | ||
if (!map) { | ||
map = sourceMap = getInlineSourceMap.call(this, source); | ||
} | ||
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// Instrument the code | ||
let instrumenter = createInstrumenter(options); | ||
instrumenter.instrument( | ||
source, | ||
this.resourcePath, | ||
(error, instrumentedSource) => { | ||
let instrumentedSourceMap = instrumenter.lastSourceMap(); | ||
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if (sourceMap && instrumentedSourceMap) { | ||
// Re-map the source map to the original source code | ||
instrumentedSourceMap = mergeSourceMap( | ||
sourceMap, | ||
instrumentedSourceMap | ||
); | ||
} | ||
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this.callback( | ||
error, | ||
instrumentedSource, | ||
instrumentedSourceMap as any as RawSourceMap | ||
); | ||
}, | ||
sourceMap as any | ||
); | ||
} | ||
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/** | ||
* If the source code has an inline base64-encoded source map, | ||
* then this function decodes it, parses it, and returns it. | ||
*/ | ||
function getInlineSourceMap( | ||
this: LoaderContext<Options>, | ||
source: string | ||
): RawSourceMap | undefined { | ||
try { | ||
// Check for an inline source map | ||
const inlineSourceMap = | ||
fromSource(source) || | ||
fromMapFileSource(source, function (filename) { | ||
return fs.readFileSync( | ||
path.resolve(path.dirname(this.resourcePath), filename), | ||
"utf-8" | ||
); | ||
}); | ||
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if (inlineSourceMap) { | ||
// Use the inline source map | ||
return inlineSourceMap.sourcemap as RawSourceMap; | ||
} | ||
} catch (e) { | ||
// Exception is thrown by fromMapFileSource when there is no source map file | ||
if ( | ||
e instanceof Error && | ||
e.message.includes( | ||
"An error occurred while trying to read the map file at" | ||
) | ||
) { | ||
this.emitWarning(e); | ||
} else { | ||
throw e; | ||
} | ||
} | ||
} |
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import { AddonOptionsWebpack } from "./types"; | ||
// @ts-expect-error no types | ||
import { loadNycConfig } from "@istanbuljs/load-nyc-config"; | ||
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export async function getNycConfig( | ||
opts: Pick<AddonOptionsWebpack["istanbul"], "cwd" | "nycrcPath"> = {} | ||
) { | ||
const cwd = opts.cwd ?? process.cwd(); | ||
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return loadNycConfig({ | ||
cwd, | ||
nycrcPath: opts.nycrcPath, | ||
}); | ||
} |
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