#!/usr/bin/python3

import re
import os
import sys

# Parsing the variable

def _dequote(part):
  if re.search(r"%[^#+.]|%$", part):
    raise ValueError("bad escape: %s" % part)
  return part.replace("%.", ':').replace("%+", '=').replace("%#", '%');

def decode(prefix_str):
  tuples = (part.split("=") for part in prefix_str.split(":") if part)
  # Will raise if any tuple can't be destructured into a pair
  return [(_dequote(dst), _dequote(src)) for dst, src in tuples]

# Applying the variable

def map_prefix(string, pm):
  for dst, src in reversed(pm):
    if string.startswith(src):
      return dst + string[len(src):]
  return string

# Main program

pm = decode(os.getenv("BUILD_PATH_PREFIX_MAP", ""))
for v in sys.argv[1:]:
  # print() tries to auto-encode its args without surrogateescape
  sys.stdout.buffer.write(map_prefix(v, pm).encode("utf-8", errors="surrogateescape") + b"\n")