V言語がCrystalを越してからRubyに到達するのにどれだけStar数を稼いでいるか見る奴

v_star_checker.v

import (
  net.http
  json
  math
)

const (
  disp_len = 100
)

struct Data {
  stargazers_count int
}

fn get_stargazer(name string) ?Data {
  resp := http.get('https://api.github.com/repos/$name') or {
    return error('Cannot fetch GitHub repository `$name`')
  }
  if resp.status_code != 200 {
    return error('Cannot fetch GitHub repository `$name`')
  }
  text := resp.text
  data := json.decode(Data, text) or {
    return error('Cannot parse json from fetched data')
  }
  return data
}

fn main() {
  v := get_stargazer('vlang/v')?
  crystal := get_stargazer('crystal-lang/crystal')?
  ruby := get_stargazer('ruby/ruby')?

  diff := ruby.stargazers_count - crystal.stargazers_count
  prog := math.max(f64(0), ruby.stargazers_count - v.stargazers_count) / diff

  done := '|'.repeat(int((f64(1) - prog) * disp_len))
  notdone := '-'.repeat(int(prog * disp_len))
  println('crystal|$done\(v)$notdone|ruby')
}