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const fs = require("fs")

const PJSON = require("./pseudo_json")

const varify = require("./varify")

let file = process.argv[2]

let input = fs.readFileSync(file, "utf8")

let included = /\n```(.*?\bincludeCode:.*)\n([^]*?\n)```/g, m

let files = Object.create(null)

let defaultFile = "code/chapter/" + file.replace(".md", ".js")

while (m = included.exec(input)) {

let [_, params, snippet] = m, directive = String(PJSON.parse(params).includeCode)

let file = defaultFile

snippet = varify(snippet.replace(/(\n|^)\s*\/\/ →.*\n/g, "$1"))

if (directive.indexOf("strip_log") > -1)

snippet = snippet.replace(/(\n|^)\s*console\.log\(.*\);\n/g, "$1")

if (m = directive.match(/top_lines:\s*(\d+)/))

snippet = snippet.split("\n").slice(0, Number(m[1])).join("\n") + "\n"

if (m = directive.match(/(?:\s|^)>(\S+)/))

file = m[1]

if (file in files)

files[file].push(snippet)

else

files[file] = [snippet]

}

for (let file in files)

fs.writeFileSync(file, files[file].join("\n"), "utf8")