unix-permissions/build/src/types/stat/tokenize.js

Swiss Army knife for Unix permissions

export const tokenize=(stat)=>{
if(typeof stat!=="string"){
return
}

const tokens=STAT_REGEXP.exec(stat);

if(tokens===null){
return
}


const[u,g,o]=tokens.slice(1).map(removeDashes).map(expandSpecial);

return{u,g,o}
};









const STAT_REGEXP=
/^\s*[-dlpscbD]?\s*([-rwxXsS]{3})\s*([-rwxXsS]{3})\s*([-rwxXtT]{3})\s*$/u;



const removeDashes=(part)=>part.replaceAll("-","");






const expandSpecial=(part)=>EXPAND_REGEXPS.reduce(specialReduce,part);


const EXPAND_REGEXPS=[
[/X/gu,"x"],
[/s/gu,"xs"],
[/S/gu,"s"],
[/t/gu,"xt"],
[/T/gu,"t"]];



export const contractSpecial=(part)=>
CONTRACT_STRINGS.reduce(specialReduce,part);

const CONTRACT_STRINGS=[
["-t","T"],
["xt","t"],
["-s","S"],
["xs","s"]];


const specialReduce=(part,[before,after])=>part.replaceAll(before,after);