Add gitea-translator server and module

machines/modules/malobeo/gitea_translator.nix

@@ -0,0 +1,78 @@
+{ config, self, lib, inputs, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.malobeo.gitea-translator;
+in
+{
+  options = {
+    services.malobeo.gitea-translator = {
+      enable = mkOption {
+        default = false;
+        type = types.bool;
+        description = lib.mdDoc "Start a webserver for hydra to use the gitea pull request api.";
+      };
+
+      baseurl = mkOption {
+        type = types.str;
+        default = "git.dynamicdiscord.de";
+        description = lib.mdDoc "Base URL of the Gitea instance.";
+      };
+
+      owner = mkOption {
+        type = types.str;
+        default = "malobeo";
+        description = lib.mdDoc "Repository owner on the Gitea instance.";
+      };
+
+      repo = mkOption {
+        type = types.str;
+        default = "infrastructure";
+        description = lib.mdDoc "Repository name on the Gitea instance.";
+      };
+
+      host = mkOption {
+        type = types.str;
+        default = "127.0.0.1";
+        description = lib.mdDoc "Address the server binds to.";
+      };
+
+      port = mkOption {
+        type = types.port;
+        default = 27364;
+        description = lib.mdDoc "Port the server listens on.";
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.gitea-translator = {
+      description = "Gitea Pull Request Translator for Hydra";
+      after = [ "network-online.target" ];
+      wants = [ "network-online.target" ];
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        ExecStart = ''
+          ${pkgs.python3}/bin/python3 ${inputs.self + /scripts/gitea_hydra_server.py} \
+            --baseurl ${cfg.baseurl} \
+            --owner ${cfg.owner} \
+            --repo ${cfg.repo} \
+            --host ${cfg.host} \
+            --port ${toString cfg.port}
+        '';
+        Restart = "on-failure";
+        RestartSec = 5;
+
+        # Hardening because why not 
+        DynamicUser = true;
+        NoNewPrivileges = true;
+        ProtectSystem = "strict";
+        ProtectHome = true;
+        PrivateTmp = true;
+        PrivateDevices = true;
+      };
+    };
+  };
+}

scripts/gitea_hydra_server.py

@@ -0,0 +1,107 @@
+#!/usr/bin/env python3
+
+#imports
+import os
+import json
+import argparse
+from http.server import BaseHTTPRequestHandler, HTTPServer
+import urllib.request
+
+def _get_api_response(baseurl, owner, repo):
+    ###https://docs.gitea.com/api/1.21/#tag/repository/operation/repoListPullRequests
+    ###GET /api/v1/repos/{owner}/{repo}/pulls
+    url=(f"https://{baseurl}/api/v1/repos/{owner}/{repo}/pulls?state=open")
+    headers={"Accept": "application/json"}
+    req=urllib.request.Request(url, headers=headers)
+    with urllib.request.urlopen(req) as resp:
+        return json.loads(resp.read().decode("utf-8"))
+
+def _parse_response(baseurl, owner, repo):
+    target_repo_url=f"https://{baseurl}/{owner}/{repo}.git"
+    pulls: dict={}
+    response=_get_api_response(baseurl, owner, repo)
+    for pr in response:
+        pr["target_repo_url"]=target_repo_url
+        pulls[str(pr["number"])]=pr
+    return pulls
+
+class PullsHandler(BaseHTTPRequestHandler):
+    _VALID_PATHS={"/", "/gitea-pulls-sorted.json"}
+
+    # Class variables to store configuration
+    baseurl = None
+    owner = None
+    repo = None
+
+    def do_GET(self):
+        if self.path not in self._VALID_PATHS:
+            self.send_error(404, "Not Found")
+            return
+
+        answer=dict(_parse_response(self.baseurl, self.owner, self.repo))
+
+        body=json.dumps(answer, indent=2, sort_keys=True).encode("utf-8")
+
+        self.send_response(200)
+        self.send_header("Content-Type", "application/json; charset=utf-8")
+        self.send_header("Content-Length", str(len(body)))
+        self.end_headers()
+        self.wfile.write(body)
+
+    def log_message(self, fmt, *args):
+        print(
+            f"[gitea-translator] {self.address_string()} - {fmt % args}",
+            flush=True,
+        )
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Hydra Server to Gitea-pull-request translator"
+    )
+    parser.add_argument(
+        "--baseurl",
+        default="git.dynamicdiscord.de",
+        help="Base URL of Gitea instance (default: git.dynamicdiscord.de)"
+    )
+    parser.add_argument(
+        "--owner",
+        default="malobeo",
+        help="Repository owner (default: malobeo)"
+    )
+    parser.add_argument(
+        "--repo",
+        default="infrastructure",
+        help="Repository name (default: infrastructure)"
+    )
+    parser.add_argument(
+        "--host",
+        default="127.0.0.1",
+        help="Host to bind to (default: 127.0.0.1)"
+    )
+    parser.add_argument(
+        "--port",
+        type=int,
+        default=27364,
+        help="Port to bind to (default: 27364)"
+    )
+
+    args = parser.parse_args()
+
+    # Set class variables so they're accessible in request handlers
+    PullsHandler.baseurl = args.baseurl
+    PullsHandler.owner = args.owner
+    PullsHandler.repo = args.repo
+
+    print(
+        f"[gitea-translator] Starting, pulling from {args.baseurl}/{args.owner}/{args.repo}",
+        flush=True,
+    )
+    server=HTTPServer((args.host, args.port), PullsHandler)
+    print(
+        f"[gitea-translator] online @ {args.host}:{args.port}",
+        flush=True,
+    )
+    server.serve_forever()
+
+if __name__ == "__main__":
+    main()