nixos/modules/services/misc/sourcehut/service.nix

   1 { config, pkgs, lib }:
   2 serviceCfg: serviceDrv: iniKey: attrs:
   3 let
   4   cfg = config.services.sourcehut;
   5   cfgIni = cfg.settings."${iniKey}";
   6   pgSuperUser = config.services.postgresql.superUser;
   7
   8   setupDB = pkgs.writeScript "${serviceDrv.pname}-gen-db" ''
   9     #! ${cfg.python}/bin/python
  10     from ${serviceDrv.pname}.app import db
  11     db.create()
  12   '';
  13 in
  14 with serviceCfg; with lib; recursiveUpdate
  15 {
  16   environment.HOME = statePath;
  17   path = [ config.services.postgresql.package ] ++ (attrs.path or [ ]);
  18   restartTriggers = [ config.environment.etc."sr.ht/config.ini".source ];
  19   serviceConfig = {
  20     Type = "simple";
  21     User = user;
  22     Group = user;
  23     Restart = "always";
  24     WorkingDirectory = statePath;
  25   } // (if (cfg.statePath == "/var/lib/sourcehut/${serviceDrv.pname}") then {
  26           StateDirectory = [ "sourcehut/${serviceDrv.pname}" ];
  27         } else {})
  28   ;
  29
  30   preStart = ''
  31     if ! test -e ${statePath}/db; then
  32       # Setup the initial database
  33       ${setupDB}
  34
  35       # Set the initial state of the database for future database upgrades
  36       if test -e ${cfg.python}/bin/${serviceDrv.pname}-migrate; then
  37         # Run alembic stamp head once to tell alembic the schema is up-to-date
  38         ${cfg.python}/bin/${serviceDrv.pname}-migrate stamp head
  39       fi
  40
  41       printf "%s" "${serviceDrv.version}" > ${statePath}/db
  42     fi
  43
  44     # Update copy of each users' profile to the latest
  45     # See https://lists.sr.ht/~sircmpwn/sr.ht-admins/<20190302181207.GA13778%40cirno.my.domain>
  46     if ! test -e ${statePath}/webhook; then
  47       # Update ${iniKey}'s users' profile copy to the latest
  48       ${cfg.python}/bin/srht-update-profiles ${iniKey}
  49
  50       touch ${statePath}/webhook
  51     fi
  52
  53     ${optionalString (builtins.trace iniKey cfgIni).migrate-on-upgrade ''
  54       if [ "$(cat ${statePath}/db)" != "${serviceDrv.version}" ]; then
  55         # Manage schema migrations using alembic
  56         ${cfg.python}/bin/${serviceDrv.pname}-migrate -a upgrade head
  57
  58         # Mark down current package version
  59         printf "%s" "${serviceDrv.version}" > ${statePath}/db
  60       fi
  61     ''}
  62
  63     ${attrs.preStart or ""}
  64   '';
  65 }
  66   (builtins.removeAttrs attrs [ "path" "preStart" ])