#!/usr/bin/env nix-shell
#!nix-shell -p python3 -i python
# vim: ft=python
#
# Run this script to update the list of EC2 images
#
import json
import io
from subprocess import check_output
from textwrap import dedent
from os import putenv

putenv('NIX_PATH', 'nixpkgs=channel:nixpkgs-unstable')

def render_tf():
  nix_eval = check_output(['nix-instantiate', '--json', '--strict', '--eval', './url_map.nix'])
  url_map = json.loads(nix_eval)

  out = io.StringIO()
  out.write(dedent("""\
    # DON'T EDIT, run '%s' instead
    variable "url_map" {
      type = map(string)

      default = {
  """ % __file__))

  for version, regions in url_map.items():
    for region, kinds in regions.items():
      for kind, ami in kinds.items():
        out.write('    "%s.%s.%s" = "%s"\n' % (version, region, kind, ami))

  out.write(dedent("""\
      }

      description = "A map of release series to actual releases"
    }
  """))

  return out.getvalue()

url_map_tf = render_tf()

with open("url_map.tf", "w") as f:
  f.write(url_map_tf)

print(url_map_tf)

# Local Variables:
# mode: Python
# End: