text: #!/usr/bin/env python
  
  import json
  import os
  import sys
  
  from lintlib import log
  
  
  def key(v):
      if v == 'master':
          return float('inf')
      if v == 'stable':
          return sys.maxsize
  
      v = v.replace('v', '').replace('rust-', '')
  
      s = 0
      for i, val in enumerate(v.split('.')[::-1]):
          s += int(val) * 100**i
  
      return s
  
  
  def main():
      if len(sys.argv) < 2:
          print("Error: specify output directory")
          return
  
      outdir = sys.argv[1]
      versions = [
          dir for dir in os.listdir(outdir) if not dir.startswith(".") and os.path.isdir(os.path.join(outdir, dir))
      ]
      versions.sort(key=key)
  
      with open(os.path.join(outdir, "versions.json"), "w") as fp:
          json.dump(versions, fp, indent=2)
          log.info("wrote JSON for great justice")
  
  
  if __name__ == "__main__":
      main()
  