@nodesecure/scanner/dist/utils/npmrc.js

A package API to run a static analysis of your module's dependencies.

// Import Node.js Dependencies
import { readFile } from "node:fs/promises";
import os from "node:os";
import path from "node:path";
function resolveEnvVars(value) {
    return value.replace(/\$\{([^}]+)\}/g, (_, envVar) => process.env[envVar] ?? "");
}
export function parseNpmRc(content) {
    const entries = {};
    for (const line of content.split("\n")) {
        const trimmed = line.trim();
        if (!trimmed || trimmed.startsWith("#") || trimmed.startsWith(";")) {
            continue;
        }
        const eqIndex = trimmed.indexOf("=");
        if (eqIndex === -1) {
            continue;
        }
        const key = trimmed.slice(0, eqIndex).trim();
        const value = resolveEnvVars(trimmed.slice(eqIndex + 1).trim());
        entries[key] = value;
    }
    return entries;
}
async function readNpmRcFile(filePath) {
    try {
        const content = await readFile(filePath, "utf-8");
        return parseNpmRc(content);
    }
    catch {
        return {};
    }
}
export async function readNpmRc(location) {
    const [userEntries, projectEntries] = await Promise.all([
        readNpmRcFile(path.join(os.homedir(), ".npmrc")),
        readNpmRcFile(path.join(location, ".npmrc"))
    ]);
    return { ...userEntries, ...projectEntries };
}
export function getRegistryForPackage(packageName, npmRcEntries, defaultRegistry) {
    const scopeMatch = packageName.match(/^(@[^/]+)\//);
    if (scopeMatch) {
        const scopeKey = `${scopeMatch[1]}:registry`;
        if (scopeKey in npmRcEntries) {
            return npmRcEntries[scopeKey];
        }
    }
    return defaultRegistry;
}
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