nixos/mailman: wrap mailman cli to start as mailman user (#332847)

      ignoreCollisions = true;

      postBuild = ''

        find $out/bin/ -mindepth 1 -not -name "mailman*" -delete

      '' + lib.optionalString config.security.sudo.enable ''

        mv $out/bin/mailman $out/bin/.mailman-wrapped

        echo '#!${pkgs.runtimeShell}

        sudo=exec

        if [[ "$USER" != mailman ]]; then

          sudo="exec /run/wrappers/bin/sudo -u mailman"

        fi

        $sudo ${placeholder "out"}/bin/.mailman-wrapped "$@"

        ' > $out/bin/mailman

        chmod +x $out/bin/mailman

      '';

    }) ];