asterisk: update updateScript to include python deps

pkgs/servers/asterisk/default.nix

@@ -4,6 +4,7 @@
   lua, speex, libopus, opusfile, libogg,
   srtp, wget, curl, iksemel, pkg-config,
   autoconf, libtool, automake,
+  python39, writeScript,
   withOpus ? true,
 }:
 
@@ -120,6 +121,12 @@ let
     };
   }) (lib.importJSON ./versions.json);
 
+  updateScript_python = python39.withPackages (p: with p; [ packaging beautifulsoup4 requests ]);
+  updateScript = writeScript "asterisk-update" ''
+    #!/usr/bin/env bash
+    exec ${updateScript_python}/bin/python ${toString ./update.py}
+  '';
+
 in {
   # Supported releases (as of 2022-04-05).
   # Source: https://wiki.asterisk.org/wiki/display/AST/Asterisk+Versions
@@ -131,6 +138,9 @@ in {
   # 19.x    Standard   2021-11-02  2022-11-02  2023-11-02
   asterisk-lts = versions.asterisk_18;
   asterisk-stable = versions.asterisk_19;
-  asterisk = versions.asterisk_19;
+  asterisk = versions.asterisk_19.overrideAttrs (o: let
+  in {
+    passthru = (o.passthru or {}) // { inherit updateScript; };
+  });
 
 } // versions

pkgs/servers/asterisk/update.py

@@ -1,8 +1,11 @@
 #!/usr/bin/env nix-shell
 #!nix-shell -i python3 -p python39 python39.pkgs.packaging python39.pkgs.beautifulsoup4 python39.pkgs.requests
+# mirrored in ./default.nix
 from packaging import version
 from bs4 import BeautifulSoup
 import re, requests, json
+import os, sys
+from pathlib import Path
 
 URL = "https://downloads.asterisk.org/pub/telephony/asterisk"
 
@@ -23,8 +26,10 @@ for mv in major_versions.keys():
         "sha256": sha
     }
 
+versions_path = Path(sys.argv[0]).parent / "versions.json"
+
 try:
-    with open("versions.json", "r") as in_file:
+    with open(versions_path, "r") as in_file:
         in_data = json.loads(in_file.read())
         for v in in_data.keys():
             print(v + ":", in_data[v]["version"], "->", out[v]["version"])
@@ -32,5 +37,5 @@ except:
     # nice to have for the PR, not a requirement
     pass
 
-with open("versions.json", "w") as out_file:
+with open(versions_path, "w") as out_file:
     out_file.write(json.dumps(out, sort_keys=True, indent=2) + "\n")