rollup-plugin-sourcemaps2/dist/index.js

Rollup plugin for grabbing source maps from sourceMappingURLs

import fs from 'node:fs';
import { promisify } from 'node:util';
import pluginUtils from '@rollup/pluginutils';
import { resolveSourceMap, resolveSources } from './source-map-resolve.js';

const { createFilter } = pluginUtils;
function sourcemaps(// eslint-disable-next-line @typescript-eslint/unbound-method
{ include, exclude, readFile } = {}) {
    // Create a filter function based on the include and exclude options
    const filter = createFilter(include, exclude);
    // Default readFile that always reads as UTF-8 string
    const defaultReadFile = (path, cb)=>{
        fs.readFile(path, 'utf8', cb);
    };
    // Use the provided readFile or the default one
    const effectiveReadFile = readFile || defaultReadFile;
    // Promisify the readFile function
    const promisifiedReadFile = promisify(effectiveReadFile);
    return {
        name: 'sourcemaps',
        load: async function(id) {
            let code;
            // If the id does not pass the filter, return null
            if (!filter(id)) {
                return null;
            }
            try {
                // Try to read the file with the given id
                code = await promisifiedReadFile(id);
                // Add the file to the watch list
                this.addWatchFile(id);
            } catch  {
                try {
                    // If reading fails, try again without a query suffix that some plugins use
                    const cleanId = id.replace(/\?.*$/, '');
                    code = (await promisifiedReadFile(cleanId)).toString();
                    // Add the file to the watch list
                    this.addWatchFile(cleanId);
                } catch  {
                    // If reading still fails, warn and return null
                    this.warn('Failed reading file');
                    return null;
                }
            }
            let map;
            try {
                // Try to resolve the source map for the code
                const result = await resolveSourceMap(code, id, promisifiedReadFile);
                // If the code contained no sourceMappingURL, return the code
                if (result === null) {
                    return code;
                }
                // If the source map was resolved, assign it to map
                map = result.map;
            } catch  {
                // If resolving the source map fails, warn and return the code
                this.warn('Failed resolving source map');
                return code;
            }
            // If the sources are not included in the map, try to resolve them
            if (map.sourcesContent === undefined) {
                try {
                    const { sourcesContent } = await resolveSources(map, id, promisifiedReadFile);
                    // If all sources are strings, assign them to map.sourcesContent
                    if (sourcesContent.every((item)=>typeof item === 'string')) {
                        map.sourcesContent = sourcesContent;
                    }
                } catch  {
                    // If resolving the sources fails, warn
                    this.warn('Failed resolving sources for source map');
                }
            }
            // Return the code and the map
            return {
                code,
                map
            };
        }
    };
}

export { sourcemaps as default };
//# sourceMappingURL=index.js.map