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;;; This file is part of GNU Taler.
;;; Copyright © 2018 GNUnet e.V.
;;;
;;; GNU Taler is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU Affero General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Taler is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU Affero General Public License for more details.
;;;
;;; You should have received a copy of the GNU Affero General Public License
;;; along with GNU Taler.  If not, see <http://www.gnu.org/licenses/>.

;; Load modules relative to the script name.
(eval-when (load compile eval)
  (set! %load-path
        (cons ((@ (guix utils) current-source-directory)) %load-path)))

(use-modules
 (srfi srfi-1)
 (ice-9 match)
 (gnu)
 (guix)
 (guix utils)
 (guix gexp)
 (guix records)
 (guix modules)
 ((gnu packages admin) #:select (shadow shepherd))
 (taler-helpers)
 ((fixed-fcgiwrap) #:prefix fixed:))

(use-system-modules nss)
(use-service-modules networking
		     ssh
		     version-control
		     cgit
		     databases
		     admin
		     web
		     shepherd)
(use-package-modules base
		     bash
		     shells
		     web
		     tls)

;;; Commentary:
;;;
;;; The GNU/Linux system that runs on gv.taler.net is defined here.





;;; --- cron jobs start
(define %certbot-job
  ;; LE cert renewal 7d / 2
  #~(job (lambda (now)
           (next-day-from (next-hour-from now '(3))
                          '(2 5)))
         (string-append #$certbot "/bin/certbot renew")))
;;; --- 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-deploy-hook
  (program-file
   "nginx-deploy-hook"
   #~(let ((pid (call-with-input-file "/var/run/nginx/pid" read)))
       (kill pid SIGHUP))))

(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")
                                            (copy-file #$(local-file "etc/nginx/conf.d/talerssl")
                                                       "conf.d/talerssl")
                                            (mkdir "sites-enabled")
                                            ;; (copy-file #$(local-file "etc/nginx/sites-enabled/git.site")
                                            ;;            "sites-enabled/git.site")
                                            (copy-file #$(local-file "etc/nginx/sites-enabled/git-ssl.site")
                                                       "sites-enabled/git-ssl.site")
                                            (copy-file #$(local-file "etc/nginx/sites-enabled/default.site")
                                                       "sites-enabled/default.site")))))

;; this includes defaults, so 'fastcgi' related files:
(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 (cons* "megaraid_sas" %base-initrd-modules))
 (kernel-arguments (list "console=ttyS0" "console=tty0"))

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

 (users
  (cons* (user-account
          (name "grothoff")
          (comment "Christian Grothoff")
          (group "users")
          (supplementary-groups '("wheel" "netdev" "kvm"))
          (home-directory "/home/grothoff"))
         (user-account
          (name "dold")
          (comment "Florian Dold")
          (group "users")
          (supplementary-groups '("wheel" "netdev" "kvm"))
          (home-directory "/home/dold"))
         (user-account
          (name "ng0")
          (comment "Nils Gillmann")
          (group "users")
          (supplementary-groups '("wheel" "netdev" "kvm"))
          (home-directory "/home/ng0"))
         (user-account
          (name "stanisci")
          (comment "Marcello Stanisci")
          (group "users")
          (supplementary-groups '("wheel" "netdev" "kvm"))
          (home-directory "/home/stanisci"))
         (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"))
         %base-file-systems))

 (packages
  (append (map specification->package
               '("mg" "cryptsetup"
                 "screen" "tmux" "wget"
                 "vim" "openssh" "openssl"
                 "nvi"
                 "postgresql"
                 "nss-certs"
                 "curl" "gnutls-dane"
                 "gitolite"
                 "acme-client"
                 #| "buildbot" |#
                 "fcgiwrap"
                 "python-future"
                 "python" "python-jinja2"
                 "python-sphinx"))
          %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: Use deploy-hook
   ;; TODO: Add git.taler.net
   ;; (service certbot-service-type
   ;;          (certbot-configuration
   ;;           ;; FIXME: switch over to taler.net domain
   ;;           (email "cert-admin-taler@n0.is")
   ;;           (certificates
   ;;            (list
   ;;             (certificate-configuration
   ;;              (domains '("gv.taler.net")))))))
   ;; 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)
             (authorized-keys
              `(("root" ,(concat-local-files
                          "root.pub"
                          '("keys/ssh/grothoff.pub"
                            "keys/ssh/ng0.pub"
                            "keys/ssh/dold.pub"
                            "keys/ssh/stanisci.pub")))
                ("stanisci" ,(local-file "keys/ssh/stanisci.pub"))
                ("dold" ,(local-file "keys/ssh/dold.pub"))
                ("ng0" ,(local-file "keys/ssh/ng0.pub"))
                ("grothoff" ,(local-file "keys/ssh/grothoff.pub"))))))

   ;; (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 fixed:fcgiwrap-service-type
            (fixed:fcgiwrap-configuration
             (socket "unix:/var/run/fcgiwrap/fcgiwrap.socket")
             (adjusted-socket-permissions #t)
             (ensure-socket-dir? #t)))
   ;;(service cgit-service-type
   ;;         (opaque-cgit-configuration
   ;;          (cgitrc "/etc/deployment/guix/etc/cgitrc")))
   (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))