get-node/build/src/checksum.js

Download a specific version of Node.js

import{createHash}from"node:crypto";
import{env}from"node:process";
import{text}from"node:stream/consumers";

import fetchNodeWebsite from"fetch-node-website";




export const checkChecksum=async({
version,
filepath,
response,
fetchOpts
})=>{
try{
const[expectedChecksum,actualChecksum]=await Promise.all([
getExpectedChecksum(version,filepath,fetchOpts),
getActualChecksum(response)]
);



if(actualChecksum!==expectedChecksum){
return`Could not download Node.js ${version}: checksum did not match`
}


}catch(error){
return`Could not download Node.js ${version} checksum: ${error.message}`
}
};






const getExpectedChecksum=async(version,filepath,fetchOpts)=>{
const checksumLines=await getChecksumLines(version,fetchOpts);
const[expectedChecksum]=checksumLines.
split("\n").
map(parseChecksumLine).
find(([,expectedFilepath])=>expectedFilepath===filepath);
return expectedChecksum
};

const getChecksumLines=async(version,fetchOpts)=>{



if(env.TEST_CHECKSUMS!==undefined){
return env.TEST_CHECKSUMS
}

const response=await fetchNodeWebsite(`v${version}/SHASUMS256.txt`,{
...fetchOpts,
progress:false
});
const checksumLines=await text(response);
return checksumLines
};

const parseChecksumLine=(checksumLine)=>
checksumLine.trim().split(CHECKSUM_LINE_DELIMITER);

const CHECKSUM_LINE_DELIMITER=/\s+/u;


const getActualChecksum=async(response)=>{
const hashStream=response.pipe(createHash("sha256",{encoding:"hex"}));
const actualChecksum=await text(hashStream);
return actualChecksum
};