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(use-modules 
 (srfi srfi-1)
 (gnu)
 (guix)
 (guix gexp))
(use-system-modules nss)
(use-service-modules networking ssh version-control databases admin web)
(use-package-modules base bash shells web)

;;; --- cron jobs start
(define %gc-job
 ;; Collect garbage once a day.
 #~(job '(next-hour '(4))
        (string-append #$guix "/bin/guix gc -F80G")))
;;; --- cron jobs end

;;; --- nginx start
;; TODO: Translate nginx code to guix nginx-service without a file
;;       if possible wiht our config.
;; DOCUMENTATION: There are 2 ways to run nginx on GuixSD, we use
;; the way which allows us to work directly on nginx files instead
;; of generating them through Guix, for now. Every update of the
;; nginx config requires a reconfigure!
(define %nginx-config
  (computed-file "nginx-config"
                 (with-imported-modules '((guix build utils))
                   #~(begin
                       (use-modules (guix build utils))
                       (mkdir #$output)
                       (chdir #$output)
                       (symlink #$(local-file "etc/nginx/nginx.conf")
                                "nginx.conf")
                       (mkdir "conf.d")
                       (copy-file #$(local-file "etc/nginx/conf.d/favicon_robots")
                                  "conf.d/favicon_robots")
                       (mkdir "sites-enabled")
                       (copy-file #$(local-file "etc/nginx/sites-enabled/git.site")
                                  "sites-enabled/git.site")
                       (copy-file #$(local-file "etc/nginx/sites-enabled/git-ssl.site")
                                  "sites-enabled/git-ssl.site")))))

;; TODO: Change to our file.
(define %nginx-mime-types
  (simple-service 'nginx-mime.types
                  etc-service-type
                  `(("nginx" ,(file-append nginx "/share/nginx/conf")))))

(define %nginx-cache-activation
  (simple-service 'nginx-/var/cache/nginx
                  activation-service-type
                  (with-imported-modules '((guix build utils))
                    #~(begin
                        (use-modules (guix build utils))
                        (mkdir-p "/var/cache/nginx")))))
;;; --- nginx end

(operating-system
  (host-name "gv")
  (timezone "Europe/Paris")
  (locale "en_US.utf8")
  (initrd-modules (append (list "megaraid_sas")
                                ;; "shpchp" is now a built-in)
                          %base-initrd-modules))

  (bootloader (bootloader-configuration
               (bootloader grub-bootloader)
               (target "/dev/sda")))

  (users (cons* (user-account
                 (name "grothoff")
                 (comment "Christian Grothoff")
                 (group "users")
                 (supplementary-groups '("wheel" "netdev"))
                 (home-directory "/home/grothoff"))
                (user-account
                 (name "dold")
                 (comment "Florian Dold")
                 (group "users")
                 (supplementary-groups '("wheel" "netdev"))
                 (home-directory "/home/dold"))
                (user-account
                 (name "git")
                 (comment "gitolite")
                 (group "git")
                 (home-directory "/home/git"))
                %base-user-accounts))

  (groups (cons (user-group
                 (name "git"))
                %base-groups))

  (file-systems (cons* (file-system
                         (device (uuid "304189db-f9df-4222-810d-94c993598c3b"))
                         (mount-point "/")
                         (type "ext4"))
                       ;;(file-system
                       ;;(mapped-device
                       ;; (source (uuid "6631d48c-1371-4b50-aa94-5863c706773e"))
                       ;;   (target "home")
                       ;; (type luks-device-mapping))
                       ;; (mount-piont "/home")
                       ;;  (type "ext4"))
                       %base-file-systems))

  (packages (append (map specification->package '("mg" "cryptsetup"
                                                  "screen" "tmux" "wget"
                                                  "vim" "openssh" "openssl"
                                                  "postgresql"
                                                  "nss-certs"
                                                  "curl" "gnutls-dane"
                                                  "gitolite"
                                                  "acme-client"
                                        ; Website dependencies:
                                                  "python" "python-jinja2"
                                                  "python-sphinx"))
                                        ; "buildbot"
                    %base-packages))
  
  ;; TODO: cgit service?
  ;; TODO: gitolite service?

  (services (cons*
             (service static-networking-service-type
                      (list
                       (static-networking
                        (interface "enp4s0f1")
                        (ip "147.87.255.221")
                        (netmask "255.255.255.240")
                        (gateway "147.87.255.209")
                        (name-servers '("8.8.8.8")))))

             (service special-files-service-type
                      ;; Using 'canonical-package' as bash and coreutils
                      ;; canonical packages are already a part of
                      ;; '%base-packages'.
                      `(("/bin/sh" ,(file-append (canonical-package bash)
                                                 "/bin/sh"))
                        ("/usr/bin/env" ,(file-append (canonical-package coreutils)
                                                      "/bin/env"))
                        ("/bin/ksh" ,(file-append (canonical-package loksh)
                                                  "/bin/ksh"))))
             ;; TODO: acme-client cronjob for:
             ;; taler.net www.taler.net api.taler.net lcov.taler.net
             ;; git.taler.net  gauger.taler.net buildbot.taler.net
             ;; test.taler.net playground.test.taler.net
             ;; auditor.test.taler.net auditor.demo.taler.net
             ;; demo.taler.net shop.test.taler.net
             ;; shop.demo.taler.net survey.test.taler.net
             ;; survey.demo.taler.net donations.demo.taler.net
             ;; backend.test.taler.net backend.demo.taler.net
             ;; bank.test.taler.net bank.demo.taler.net
             ;; www.git.taler.net exchange.demo.taler.net
             ;; exchange.test.taler.net env.taler.net
             ;; envs.taler.net blog.demo.taler.net
             ;; blog.test.taler.net donations.test.taler.net
             ;; docs.taler.net intranet.taler.net stage.taler.net
             (service openssh-service-type
                      (openssh-configuration
                       (x11-forwarding? #t)
                       (port-number 22)
                       (password-authentication? #f)
                       (permit-root-login 'without-password)))
                        
             (service rottlog-service-type (rottlog-configuration))
             (service mcron-service-type
                      (mcron-configuration
                       (jobs (list %gc-job %thing1))))
             (service postgresql-service-type)
             (git-daemon-service
              #:config (git-daemon-configuration
                        (user-path "git")))
             (service openntpd-service-type
                      (openntpd-configuration
                       (listen-on '("127.0.0.1" "::1"))
                       (sensor '("udcf0 correction 70000"))
                       (constraint-from '("www.gnu.org"))
                       (constraints-from '("https://www.google.com/"))
                       (allow-large-adjustment? #t)))
             (service nginx-service-type
                      (nginx-configuration
                       (file (file-append %nginx-config
                                          "/nginx.conf"))))
             %nginx-mime-types
             %nginx-cache-activation
             (modify-services %base-services
               (guix-service-type
                config =>
                (guix-configuration
                 (inherit config)
                 (substitute-urls
                  (cons* "https://berlin.guixsd.org"
                         %default-substitute-urls)))))))
             
  ;; Allow resolution of '.local' host names with mDNS.
  (name-service-switch %mdns-host-lookup-nss))