rebash/src/utils/parseArgs.js at master · lpan/rebash · GitHub

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import {

split, take, T, equals, tail, compose, reduce, cond, objOf, head, mergeWith,

drop, concat, flip, append, map,

} from 'ramda';

// need to make it an array so we can use concat

// We use concat because user can inputs multiple flags at once

// eg. 'ls -al' -> ['a', 'l']

const toArray = flip(append)([]);

const parseFlag = compose(objOf('flags'), split(''), tail);

const parseOption = compose(objOf('fulls'), toArray, drop(2));

const parseTarget = compose(objOf('targets'), toArray);

const classifyArg = cond([

[compose(equals('--'), take(2)), parseOption],

[compose(equals('-'), head), parseFlag],

[T, parseTarget],

]);

const mergeArg = mergeWith(concat);

const formatArgs = reduce((accum, current) =>

mergeArg(accum, classifyArg(current)),

{fulls: [], flags: [], targets: []}

);

const getArgs = compose(tail, split(' '));

const sortArgs = map(args => args.sort());

/**

* Parse raw command and returns an args object

* 'ls -a -l --lmao' -> {targets: [], flags: ['a', 'l'], fulls: ['lmao']}

* @param {String} Command - raw command from user

* @returns {obj} - {fulls: [], flags: [], targets: []}

const parseArgs = compose(sortArgs, formatArgs, getArgs);

export default parseArgs;

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