get-node/build/src/version.js

Download a specific version of Node.js

import{basename}from"node:path";
import{version as processVersion}from"node:process";

import nodeVersionAlias from"node-version-alias";
import preferredNodeVersion,{
NODE_VERSION_FILES}from
"preferred-node-version";
import semver from"semver";


export const DEFAULT_VERSION_RANGE="latest";


export const validateVersionRange=(versionRange)=>{
if(typeof versionRange!=="string"){
throw new TypeError(`Node version range must be a string: ${versionRange}`)
}

if(!isVersionRange(versionRange)){
throw new TypeError(`Not a valid Node version range: ${versionRange}`)
}
};

const isVersionRange=(versionRange)=>
ALIASES.has(versionRange)||
isVersionFile(versionRange)||
semver.validRange(versionRange)!==null;



const ALIASES=new Set(["latest","lts","global","local"]);





export const getVersion=async({
versionRange,
preferredNodeOpts,
nodeVersionAliasOpts
})=>{
const version=await resolveVersion({
versionRange,
preferredNodeOpts,
nodeVersionAliasOpts
});
checkVersion(version);
return version
};

const resolveVersion=({
versionRange,
preferredNodeOpts,
nodeVersionAliasOpts
})=>{
if(versionRange==="global"){
return getPreferredVersion({...preferredNodeOpts,global:true})
}

if(versionRange==="local"){
return getPreferredVersion(preferredNodeOpts)
}

if(isVersionFile(versionRange)){
return getPreferredVersion({...preferredNodeOpts,files:[versionRange]})
}

return nodeVersionAlias(versionRange,nodeVersionAliasOpts)
};

const isVersionFile=(versionRange)=>
NODE_VERSION_FILES_SET.has(basename(versionRange));

const NODE_VERSION_FILES_SET=new Set(NODE_VERSION_FILES);

const getPreferredVersion=async(preferredNodeOpts)=>{
const{version}=await preferredNodeVersion(preferredNodeOpts);

if(version===undefined){
return processVersion.replace("v","")
}

return version
};



const checkVersion=(version)=>{
if(semver.lt(version,MINIMUM_VERSION)){
throw new Error(
`Unsupported Node.js version: ${version}. Must be >= ${MINIMUM_VERSION}.`
)
}
};

const MINIMUM_VERSION="0.8.6";