main.js

const parser = require("./agg_pipeline.js")
const fs = require("fs")

function cleanWhiteSpace(s) {
    var ret = ''
    var inDString = false
    var inSString = false
    for (var i = 0, len = s.length; i < len; i++) {
        var ch = s.charAt(i)
	if (ch === '\\') {
	    ret += ch
	    i++
	    ret += s.charAt(i)
	    continue
	}
        if (inDString) {
            if (ch === '"') {
                inDString = false
            }
            ret += ch
        } else if (inSString) {
            if (ch === "'") {
                inSString = false
            }
            ret += ch
        } else {
            if (ch === '"') {
                inDString = true
                ret += ch
            } else if (ch === "'") {
                inSString = true
                ret += ch
            } else if (ch === ' ' || ch === "\t" || ch === "\n" || ch === "\r") {
                continue
            } else {
                ret += ch
            }
        }
    }
    return ret
}

if (process.argv.length < 3) {
     console.log("Must pass a file to parse")
} else {
     var input = cleanWhiteSpace(fs.readFileSync(process.argv[2]).toString())
     var output = parser.parse(input)
     console.log(JSON.stringify(output, null, 4))
}