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// @flow
import type { VLQMap, SourceMapStringifyOptions } from './types';
import path from 'path';
export function generateInlineMap(map: string): string {
return `data:application/json;charset=utf-8;base64,${Buffer.from(map).toString('base64')}`;
}
export async function partialVlqMapToSourceMap(map: VLQMap, opts: SourceMapStringifyOptions): Promise<VLQMap | string> {
let { fs, file, sourceRoot, inlineSources, rootDir, format = 'string' } = opts;
let resultMap = {
...map,
sourcesContent: map.sourcesContent
? map.sourcesContent.map((content) => {
if (content) {
return content;
} else {
return null;
}
})
: [],
version: 3,
file,
sourceRoot,
};
if (resultMap.sourcesContent.length < resultMap.sources.length) {
for (let i = 0; i <= resultMap.sources.length - resultMap.sourcesContent.length; i++) {
resultMap.sourcesContent.push(null);
}
}
if (fs) {
resultMap.sourcesContent = await Promise.all(
resultMap.sourcesContent.map(async (content, index): Promise<string | null> => {
let sourceName = map.sources[index];
// If sourceName starts with `..` it is outside rootDir, in this case we likely cannot access this file from the browser or packaged node_module
// Because of this we have to include the sourceContent to ensure you can always see the sourcecontent for each mapping.
if (!content && (inlineSources || sourceName.startsWith('..'))) {
try {
return await fs.readFile(path.resolve(rootDir || '/', sourceName), 'utf-8');
} catch (e) {}
}
return content;
})
);
}
if (format === 'inline' || format === 'string') {
let stringifiedMap = JSON.stringify(resultMap);
if (format === 'inline') {
return generateInlineMap(stringifiedMap);
}
return stringifiedMap;
}
return resultMap;
}