path: root/src/xyz/euandreh/queue.scm

(define-module (xyz euandreh queue)
  #:use-module ((gnu build linux-container) #:prefix container:)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module ((srfi srfi-1) #:prefix srfi-1:)
  #:use-module (guix build-system gnu)
  #:use-module (guix build-system python)
  #:use-module (guix build-system trivial)
  #:use-module (guix download)
  #:use-module (guix gexp)
  #:use-module (guix git-download)
  #:use-module (guix packages)
  #:use-module (guix records)
  #:use-module (guix utils)
  #:use-module (gnu)
  #:use-module (gnu packages admin)
  #:use-module (gnu packages check)
  #:use-module (gnu packages cpio)
  #:use-module (gnu packages cups)
  #:use-module (gnu packages cyrus-sasl)
  #:use-module (gnu packages dbm)
  #:use-module (gnu packages image)
  #:use-module (gnu packages glib)
  #:use-module (gnu packages gnome)
  #:use-module (gnu packages mail)
  #:use-module (gnu packages m4)
  #:use-module (gnu packages onc-rpc)
  #:use-module (gnu packages package-management)
  #:use-module (gnu packages perl)
  #:use-module (gnu packages python-build)
  #:use-module (gnu packages python-crypto)
  #:use-module (gnu packages python-web)
  #:use-module (gnu packages python-xyz)
  #:use-module (gnu packages time)
  #:use-module (gnu packages tls)
  #:use-module (gnu packages xml)
  #:use-module (gnu services shepherd)
  #:export (<shadow-group-configuration>
             shadow-group-configuration
             shadow-group-configuration-group

             shadow-group-activation
             shadow-group-accounts
             shadow-group-service-type


            <cyrus-service-configuration>
             cyrus-service-configuration
             cyrus-service-configuration-name
             cyrus-service-configuration-authmech
             cyrus-service-configuration-log-level

            <cyrus-sasl-configuration>
             cyrus-sasl-configuration
             cyrus-sasl-configuration-cyrus-sasl
             cyrus-sasl-configuration-authmech
             cyrus-sasl-configuration-services
             cyrus-sasl-configuration-state-dir

             cyrus-sasl-etc-files
             cyrus-sasl-activation
             cyrus-sasl-accounts
             cyrus-sasl-shepherd-service
             cyrus-sasl-service-type


            <dkimproxyout-configuration>
             dkimproxyout-configuration
             dkimproxyout-configuration-dkimproxy
             dkimproxyout-configuration-user
             dkimproxyout-configuration-group
             dkimproxyout-configuration-listen
             dkimproxyout-configuration-relay
             dkimproxyout-configuration-domains
             dkimproxyout-configuration-selector
             dkimproxyout-configuration-key-size
             dkimproxyout-configuration-data-directory

             dkimproxyout-etc-files
             dkimproxyout-accounts
             dkimproxyout-activation
             dkimproxyout-shepherd-service
             dkimproxyout-service-type

             postfix-service-type
             postfix-configuration

             dovecot2-service-type))



;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;; packages ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;



(define-public postfix
  (package
    (name "postfix")
    (version "3.8-20221023")
    (source
      (origin
        (method url-fetch)
        (uri
          (string-append
           "http://cdn.postfix.johnriley.me/mirrors/postfix-release/experimental/postfix-"
           version
           ".tar.gz"))
        (sha256
          (base32 "0aaylhn81n9z3kidx53kzf2jrilr3lgwfxsk1r4hn7nkrp62bcwm"))))
    (build-system gnu-build-system)
    (arguments
      (list
       #:tests? #f
       #:modules `((srfi srfi-26)
                   ,@%gnu-build-system-modules)
       #:phases
       #~(modify-phases %standard-phases
           (add-before 'configure 'patch-/bin/sh
             (lambda _
               (substitute* (find-files "." "^Makefile")
                 (("/bin/sh")
                  (which "sh")))))
           (add-before 'configure 'patch-bdb-include
             (lambda* (#:key inputs #:allow-other-keys)
               (substitute* "makedefs"
                 (("/usr/include")
                  (string-append (assoc-ref inputs "bdb")
                                 "/include")))))
           (add-before 'configure 'dont-hardcode-PATH
             (lambda _
               (substitute* '("postfix-install"
                              "conf/post-install")
                 (("^PATH=")
                  "# PATH="))))
           (add-before 'configure 'fix-strict-PATH
             (lambda _
               (substitute* "src/util/sys_defs.h"
                 (("^#define (ROOT_PATH|_PATH_DEFPATH|_PATH_STDPATH).*")
                    "#define ROOT_PATH \"/run/setuid-programs:/run/current-system/profile/bin:/run/current-system/profile/sbin\"\n"))))
           (add-before 'configure 'use-relative-symlink-to-store
             (lambda _
               (substitute* "postfix-install"
                 (("ln -sf")
                   "ln -rsf"))))
           (add-before 'configure 'fix-absolute-path-to-setuid-programs
             (lambda _
               (substitute* "conf/postfix-script"
                 (("\\$command_directory/postqueue")
                   "/run/setuid-programs/postqueue")
                 (("\\$command_directory/postdrop")
                   "/run/setuid-programs/postdrop"))))
           (add-before 'configure 'disable-warning-on-non-writable-config-files
             (lambda _
               (substitute* "conf/postfix-script"
                 (("find \\$todo \\\\\\( -perm -020 -o -perm -002 \\\\\\) \\\\\n")
                   " # find $todo \\( -perm -020 -o -perm -002 \\)"))))
           (add-before 'configure 'disable-write-to-/etc/postfix
             (lambda _
               (substitute* "src/postconf/postconf_edit.c"
                 (("pcf_set_config_dir.*")
                  "return;"))))
           (add-before 'configure 'setup-environment
             (lambda* (#:key outputs inputs #:allow-other-keys)
               (setenv "CCARGS" (string-append "-DUSE_TLS -DUSE_SASL_AUTH -DUSE_CYRUS_SASL -I"
                                               (assoc-ref inputs "cyrus-sasl")
                                               "/include/sasl"))
               (setenv "AUXLIBS" "-lnsl -lcrypto -lssl -lsasl2")
               (let* ((out  (assoc-ref outputs "out"))
                      (bin     (string-append out "/bin"))
                      (sbin    (string-append out "/sbin"))
                      (lib     (string-append out "/lib/postfix"))
                      (libexec (string-append out "/libexec/postfix"))
                      (etc     (string-append out "/etc/postfix"))
                      (man     (string-append out "/share/man"))
                      (doc     (string-append out "/share/doc/postfix-" #$version))
                      (html    (string-append doc "/html")))
                 (setenv "install_root"         "wip-prefix")
                 (setenv "newaliases_path"      (string-append bin  "/newaliases"))
                 (setenv "mailq_path"           (string-append bin  "/mailq"))
                 (setenv "sendmail_path"        (string-append sbin "/sendmail"))
                 (setenv "command_directory"    sbin)
                 (setenv "shlib_directory"      lib)
                 (setenv "daemon_directory"     libexec)
                 (setenv "meta_directory"       etc)
                 (setenv "sample_directory"     etc)
                 (setenv "manpage_directory"    man)
                 (setenv "readme_directory"     doc)
                 (setenv "html_directory"       html)
                 (setenv "sample_directory"     (string-append out "/share/postfix")))))
           (replace 'configure
             (lambda _
               (invoke "make" "makefiles"
                              "pie=yes"
                              "dynamicmaps=yes")))
           (replace 'install
             (lambda* (#:key outputs #:allow-other-keys)
               (let ((out (assoc-ref outputs "out")))
                 (invoke "make" "non-interactive-package")
                 (delete-file-recursively "wip-prefix/var")
                 (copy-recursively "wip-prefix/etc" (string-append out "/etc"))
                 (copy-recursively (string-append "wip-prefix" out) out)))))))
    (inputs
      (list bdb
            cyrus-sasl
            libnsl
            openssl
            perl))
    (native-inputs
      (list m4))
    (home-page "https://www.postfix.org")
    (synopsis "sendmail compatible MTA")
    (description
     "Postfix is Wietse Venema's mail server that started life at IBM research
as an alternative to the widely-used Sendmail program.  Now at Google, Wietse
continues to support Postfix.

Postfix attempts to be fast, easy to administer, and secure.  The outside has a
definite Sendmail-ish flavor, but the inside is completely different.")
    (license (list license:ibmpl1.0
                   license:epl2.0))))

(define-public python-pytest-tornado5
  (package
    (name "python-pytest-tornado5")
    (version "2.0.0")
    (source
      (origin
        (method url-fetch)
        (uri
          (pypi-uri "pytest-tornado5" version))
        (sha256
         (base32 "0qb62jw2w0xr6y942yp0qxiy755bismjfpnxaxjjm05gy2pymr8d"))))
    (build-system python-build-system)
    (propagated-inputs (list python-pytest python-tornado))
    (home-page "https://github.com/vidartf/pytest-tornado")
    (synopsis
     "A py.test plugin providing fixtures and markers to simplify testing of asynchronous tornado applications.")
    (description
     "This package provides a py.test plugin providing fixtures and markers to
simplify testing of asynchronous tornado applications.")
    (license license:asl2.0)))

;; FIXME
#;
(define-public python-futures
  (package
    (name "python-futures")
    (version "3.3.0")
    (source
      (origin
        (method url-fetch)
        (uri
          (pypi-uri "futures" version))
        (sha256
          (base32 "154pvaybk9ncyb1wpcnzgd7ayvvhhzk92ynsas7gadaydbvkl0vy"))))
    (build-system python-build-system)
    (home-page "https://github.com/agronholm/pythonfutures")
    (synopsis "Backport of the concurrent.futures package from Python 3")
    (description "Backport of the concurrent.futures package from Python 3")
    (license #f)))

(define-public python-ordereddict
  (package
    (name "python-ordereddict")
    (version "1.1")
    (source
      (origin
        (method url-fetch)
        (uri
          (pypi-uri "ordereddict" version))
        (sha256
          (base32 "07qvy11nvgxpzarrni3wrww3vpc9yafgi2bch4j2vvvc42nb8d8w"))))
    (build-system python-build-system)
    (arguments
      `(#:phases
        (modify-phases %standard-phases
          (delete 'sanity-check))))
    (home-page "UNKNOWN")
    (synopsis
     "A drop-in substitute for Py2.7's new collections.OrderedDict that works in Python 2.4-2.6.")
    (description "This package provides a drop-in substitute for Py2.7's new
collections.OrderedDict that works in Python 2.4-2.6.")
    (license #f)))

(define-public python-funcsigs
  (package
    (name "python-funcsigs")
    (version "1.0.2")
    (source
      (origin
        (method url-fetch)
        (uri
          (pypi-uri "funcsigs" version))
        (sha256
          (base32 "0l4g5818ffyfmfs1a924811azhjj8ax9xd1cffr1mzd3ycn0zfx7"))))
    (build-system python-build-system)
    (propagated-inputs
      (list python-ordereddict))
    (native-inputs
      (list python-unittest2))
    (home-page "http://funcsigs.readthedocs.org")
    (synopsis
     "Python function signatures from PEP362 for Python 2.6, 2.7 and 3.2+")
    (description
     "Python function signatures from PEP362 for Python 2.6, 2.7 and 3.2+")
    (license #f)))

(define-public python-apscheduler
  (package
    (name "python-apscheduler")
    (version "3.9.1")
    (source
      (origin
        (method url-fetch)
        (uri
          (pypi-uri "APScheduler" version))
        (sha256
          (base32 "1qzi1pr7q72vs49p7vr1mp350zaggs52lpq43lvqsjcmcd5mgrk5"))))
    (build-system python-build-system)
    (arguments
      `(#:tests? #f))
    (propagated-inputs
      (list python-funcsigs
            ; python-futures
            python-pytz
            python-setuptools
            python-six
            python-tzlocal))
    (native-inputs
      (list python-mock
            python-pytest
            python-pytest-asyncio
            python-pytest-cov
            python-pytest-tornado5
            python-setuptools-scm))
    (home-page "https://github.com/agronholm/apscheduler")
    (synopsis "In-process task scheduler with Cron-like capabilities")
    (description "In-process task scheduler with Cron-like capabilities")
    (license license:expat)))

(define-public python-telegram-bot
  (package
    (name "python-telegram-bot")
    (version "13.12")
    (source
      (origin
        (method url-fetch)
        (uri
          (pypi-uri "python-telegram-bot" version))
        (sha256
          (base32 "1rbdyr1f9mndlh83in47k8if65yp9n1dy4px2wipbf0qyjv5zxfs"))))
    (build-system python-build-system)
    (arguments
      `(#:tests? #f
        #:phases
        (modify-phases %standard-phases
          (delete 'sanity-check))))
    (native-inputs
      (list python-apscheduler))
    (propagated-inputs
      (list python-apscheduler
            python-cachetools
            python-certifi
            python-pytz
            python-tornado))
    (home-page "https://python-telegram-bot.org/")
    (synopsis "Python library to interface with the Telegram Bot API")
    (description "We have made you a wrapper you can't refuse")
    (license #f)))



;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;; services ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;



(define-record-type* <shadow-group-configuration>
  shadow-group-configuration
  make-shadow-group-configuration
  shadow-group-configuration?
  (group shadow-group-configuration-group (default "etc-shadow")))

(define (shadow-group-activation config)
  (match-record config <shadow-group-configuration>
      (group)
    #~(begin
        (use-modules (guix build utils))
        (format (current-error-port)
         "Setting ownership and permission for \"/etc/shadow\".~%")
        (chown "/etc/shadow"
               (passwd:uid (getpwnam "root"))
               (group:gid  (getgrnam #$group)))
        (chmod "/etc/shadow" #o640))))

(define (shadow-group-accounts config)
  (match-record config <shadow-group-configuration>
      (group)
    (list
     (user-group
       (name group)
       (system? #t)))))

(define shadow-group-service-type
  (service-type
    (name 'shadow-group)
    (extensions
      (list
       (service-extension activation-service-type
                          shadow-group-activation)
       (service-extension account-service-type
                          shadow-group-accounts)))
    (default-value (shadow-group-configuration))
    (description "FIXME:DOCUMENTATION")))


(define-record-type* <cyrus-service-configuration>
  cyrus-service-configuration
  make-cyrus-service-configuration
  cyrus-service-configuration?
  (name      cyrus-service-configuration-name)
  (authmech  cyrus-service-configuration-authmech  (default "saslauthd"))
  (log-level cyrus-service-configuration-log-level (default 7)))

(define-record-type* <cyrus-sasl-configuration>
  cyrus-sasl-configuration
  make-cyrus-sasl-configuration
  cyrus-sasl-configuration?
  (cyrus-sasl           cyrus-sasl-configuration-cyrus-sasl           (default cyrus-sasl))
  (user                 cyrus-sasl-configuration-user                 (default "cyrus-sasl"))
  (group                cyrus-sasl-configuration-group                (default "cyrus-sasl"))
  (supplementary-groups cyrus-sasl-configuration-supplementary-groups (default '("etc-shadow")))
  (authmech             cyrus-sasl-configuration-authmech             (default "shadow"))
  (services             cyrus-sasl-configuration-services             (default '()))
  (config-dirname       cyrus-sasl-configuration-config-dirname       (default "sasl2"))
  (run-directory        cyrus-sasl-configuration-run-directory        (default "/var/run/saslauthd"))
  (run-in-container?    cyrus-sasl-configuration-run-in-container?    (default #t))
  (container-name       cyrus-sasl-configuration-container-name       (default "saslauthd"))
  (container-namespaces cyrus-sasl-configuration-container-namespaces (default container:%namespaces))
  (extra-mappings       cyrus-sasl-configuration-extra-mappings       (default '())))


(define (cyrus-sasl-etc-files config)
  ;; FIXME: support opaque files
  ;; FIXME: extend this with postfix instead of making postfix add here
  (match-record config <cyrus-sasl-configuration>
      (services config-dirname run-directory)
    `((,config-dirname
       ,(file-union
         config-dirname
         (map (lambda (service-config)
                (match-record service-config <cyrus-service-configuration>
                    (name authmech log-level)
                  `(,name ,(plain-file
                            name
                            (format #f
                             "pwcheck_method: ~a~%saslauthd_path: ~a/mux~%log_level: ~a~%"
                             authmech
                             run-directory
                             log-level)))))
              services))))))

(define (cyrus-sasl-activation config)
  (match-record config <cyrus-sasl-configuration>
      (user run-directory)
    #~(begin
        (use-modules (guix build utils))
        (let ((user (getpwnam #$user)))
          (format (current-error-port)
           "Creating Cyrus SASL socket directory: \"~a\".~%" #$run-directory)
          (mkdir-p #$run-directory)
          (chown #$run-directory (passwd:uid user) (passwd:gid user))
          (chmod #$run-directory #o755)))))

(define (cyrus-sasl-accounts config)
  (match-record config <cyrus-sasl-configuration>
      (user group supplementary-groups)
    (list
     (user-account
       (name user)
       (group group)
       (supplementary-groups supplementary-groups)
       (comment "Cyrus SASL system user")
       (home-directory "/var/empty")
       (create-home-directory? #f)
       (shell
         (file-append shadow "/sbin/nologin"))
       (system? #t))
     (user-group
       (name group)
       (system? #t)))))


(define (cyrus-sasl-shepherd-service config)
  (match-record config <cyrus-sasl-configuration>
      (cyrus-sasl user group supplementary-groups authmech config-dirname run-directory
       services run-in-container? container-name container-namespaces extra-mappings)
    (let* ((config-dir (string-append "/etc/" config-dirname))
           (bin (file-append cyrus-sasl "/sbin/saslauthd"))
           (cmd (if (not run-in-container?)
                  bin
                  (least-authority-wrapper
                   bin
                   #:name container-name
                   #:mappings (append
                               (list
                                (file-system-mapping
                                  (source run-directory)
                                  (target source)
                                  (writable? #t))
                                (file-system-mapping
                                  (source "/etc/passwd")
                                  (target source))
                                (file-system-mapping
                                  (source "/etc/shadow")
                                  (target source)))
                                extra-mappings)
                   #:namespaces container-namespaces))))
      (list
       (shepherd-service
         (provision '(cyrus-sasl))
         (documentation "FIXME:DOCUMENTATION")
         (start #~(make-forkexec-constructor
                   (list #$cmd "-a" #$authmech "-d" "-m" #$run-directory)
                   #:user #$user
                   #:group #$group
                   #:supplementary-groups '(#$@supplementary-groups)))
         (stop #~(make-kill-destructor))
         (actions
           (list
            (shepherd-action
              (name 'configuration)
              (documentation "FIXME:DOCUMENTATION")
              (procedure
                #~(lambda _
                    (for-each (lambda (name)
                                (format #t "~a/~a~%" #$config-dir name))
                              (map cyrus-service-configuration-name #$services))))))))))))

(define cyrus-sasl-service-type
  (service-type
    (name 'cyrus-sasl)
    (extensions
      (list
       (service-extension etc-service-type
                          cyrus-sasl-etc-files)
       (service-extension activation-service-type
                          cyrus-sasl-activation)
       (service-extension profile-service-type
                          (compose list cyrus-sasl-configuration-cyrus-sasl))
       (service-extension account-service-type
                          cyrus-sasl-accounts)
       (service-extension shepherd-root-service-type
                          cyrus-sasl-shepherd-service)))
    (compose srfi-1:concatenate)
    (extend (lambda (config services)
              (cyrus-sasl-configuration
                (inherit config)
                (services
                  (append
                   (cyrus-sasl-configuration-services config)
                   services)))))
    (default-value (cyrus-sasl-configuration))
    (description "FIXME:DOCUMENTATION")))


(define-record-type* <dkimproxyout-configuration>
  dkimproxyout-configuration
  make-dkimproxyout-configuration
  dkimproxyout-configuration?
  (dkimproxy            dkimproxyout-configuration-dkimproxy            (default dkimproxy))
  (user                 dkimproxyout-configuration-user                 (default "dkimproxyout"))
  (group                dkimproxyout-configuration-group                (default "dkimproxyout"))
  (config-name          dkimproxyout-configuration-config-name          (default "dkimproxyout.conf"))
  (listen               dkimproxyout-configuration-listen               (default "127.0.0.1:10027"))
  (relay                dkimproxyout-configuration-relay                (default "127.0.0.1:10028"))
  (domains              dkimproxyout-configuration-domains              (default (list (gethostname))))
  (selector             dkimproxyout-configuration-selector             (default "dkimproxyout"))
  (key-size             dkimproxyout-configuration-key-size             (default 2048))
  (data-directory       dkimproxyout-configuration-data-directory       (default "/var/lib/dkimproxyout"))
  (run-in-container?    dkimproxyout-configuration-run-in-container?    (default #f))
  (container-name       dkimproxyout-configuration-container-name       (default "dkimproxyout"))
  (container-namespaces dkimproxyout-configuration-container-namespaces (default (srfi-1:fold delq container:%namespaces '(net))))
  (extra-mappings       dkimproxyout-configuration-extra-mappings       (default '())))

(define (generate-out.cf config)
  (match-record config <dkimproxyout-configuration>
      (listen relay domains selector data-directory)
    (format #f
"
listen ~a
relay ~a

domain ~a
selector ~a

signature dkim(c=relaxed/relaxed)

# FIXME:DOCUMENTATION add this to the service documentation
# the corresponding public key is available at:
# ~a/public.key
keyfile ~a/private.key
"
       listen
       relay
       (string-join domains ",")
       selector
       data-directory
       data-directory)))

(define (dkimproxyout-etc-files config)
  (match-record config <dkimproxyout-configuration>
      (config-name)
    `((,config-name ,(plain-file config-name (generate-out.cf config))))))

(define (dkimproxyout-accounts config)
  (match-record config <dkimproxyout-configuration>
      (user group)
    (list
     (user-account
       (name user)
       (group group)
       (comment "DKIMproxy.out signing system user")
       (home-directory "/var/empty")
       (create-home-directory? #f)
       (shell
         (file-append shadow "/sbin/nologin"))
       (system? #t))
     (user-group
       (name group)
       (system? #t)))))

(define (dkimproxyout-activation config)
  (match-record config <dkimproxyout-configuration>
      (user group data-directory key-size)
    #~(begin
        (use-modules (guix build utils))
        (let ((uid (passwd:uid (getpwnam #$user)))
              (gid (group:gid  (getgrnam #$group))))
          (format (current-error-port)
           "Creating DKIMproxy.out data directory: \"~a\".~%" #$data-directory)
          (mkdir-p #$data-directory)
          (chown #$data-directory uid gid)
          (chmod #$data-directory #o755)
          (let ((private-key (string-append #$data-directory "/private.key"))
                (public-key  (string-append #$data-directory "/public.key")))
            (unless (file-exists? private-key)
              (format (current-error-port)
               "The public/private keypair doesn't exist yet.  Generating one...~%")
              (cond
                ((zero? (system* #$(file-append openssl "/bin/openssl")
                                 "genrsa"
                                 "-out"
                                 private-key
                                 (number->string #$key-size)))
                 (format (current-error-port)
                  "DKIMproxy.out private key file created: \"~a\".~%" private-key))
                (else
                 (format (current-error-port)
                  "Failed to create DKIMproxy.out private key file: \"~a\".~%" private-key))))
            (invoke #$(file-append openssl "/bin/openssl")
                    "rsa"
                    "-in"
                    private-key
                    "-pubout"
                    "-out"
                    public-key)
            (format (current-error-port)
             "Setting permissions for the public/private DKIMproxy.out keypair: \"~a/{public,private}.key\".~%" #$data-directory)
            (chown private-key uid gid)
            (chown public-key  uid gid)
            (chmod private-key #o400)
            (chmod public-key  #o644))))))


(define (dkimproxyout-shepherd-service config)
  (match-record config <dkimproxyout-configuration>
      (dkimproxy user group config-name data-directory
       run-in-container? container-name container-namespaces extra-mappings)
    (let* ((config-file (string-append "/etc/" config-name))
           (bin (file-append dkimproxy "/bin/dkimproxy.out"))
           (cmd (if (not run-in-container?)
                  bin
                  (least-authority-wrapper
                   bin
                   #:name container-name
                   #:mappings (append
                               (list
                                (file-system-mapping
                                  (source config-file)
                                  (target source))
                                (file-system-mapping
                                  (source
                                    (string-append data-directory "/private.key"))
                                  (target source)))
                               extra-mappings)
                   #:namespaces container-namespaces))))
      (list
       (shepherd-service
         (provision '(dkimproxyout))
         (documentation "FIXME:DOCUMENTATION")
         (start #~(make-forkexec-constructor
                   (list #$cmd "--conf_file" #$config-file)
                   #:user  #$user
                   #:group #$group))
         (stop #~(make-kill-destructor))
         (actions
           (list
            (shepherd-action
              (name 'configuration)
              (documentation "FIXME:DOCUMENTATION")
              (procedure
                #~(lambda _
                    (format #t "~a~%" #$config-file)))))))))))


(define-public dkimproxyout-service-type
  (service-type
    (name 'dkimproxyout)
    (extensions
      (list
       (service-extension etc-service-type
                          dkimproxyout-etc-files)
       (service-extension account-service-type
                          dkimproxyout-accounts)
       (service-extension activation-service-type
                          dkimproxyout-activation)
       (service-extension profile-service-type
                          (compose list dkimproxyout-configuration-dkimproxy))
       (service-extension shepherd-root-service-type
                          dkimproxyout-shepherd-service)))
    (default-value (dkimproxyout-configuration))
    (description "FIXME:DOCUMENTATION")))











;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Postfix ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;



(define-record-type* <postfix-configuration>
  postfix-configuration
  make-postfix-configuration
  postfix-configuration?
  (postfix              postfix-configuration-postfix              (default postfix))
  (set-sendmail?        postfix-configuration-set-sendmail?        (default #t))
  (master.cf-file       postfix-configuration-master.cf-file       (default #f))
  (main.cf-file         postfix-configuration-main.cf-file         (default #f))
  (master.cf-extra      postfix-configuration-master.cf-extra      (default ""))
  (main.cf-extra        postfix-configuration-main.cf-extra        (default ""))
  (config-dirname       postfix-configuration-config-dirname       (default "postfix"))
  (data-directory       postfix-configuration-data-directory       (default "/var/lib/postfix"))
  (queue-directory      postfix-configuration-queue-directory      (default "/var/spool/postfix"))
  (user                 postfix-configuration-user                 (default "postfix"))
  (group                postfix-configuration-group                (default "postfix"))
  (setgid-group         postfix-configuration-setgid-group         (default "postdrop"))
  (root-aliases         postfix-configuration-root-aliases         (default '("abuse" "admin" "hostmaster" "postmaster")))
  (cert-file            postfix-configuration-cert-file            (default #f))
  (key-file             postfix-configuration-key-file             (default #f))
  (hostname             postfix-configuration-hostname             (default (gethostname)))
  (run-in-container?    postfix-configuration-run-in-container?    (default #f))
  (container-name       postfix-configuration-container-name       (default "postfix"))
  (container-namespaces postfix-configuration-container-namespaces (default (srfi-1:fold delq container:%namespaces '(net))))
  (extra-mappings       postfix-configuration-extra-mappings       (default '())))

; FIXME: hardcoded value of dkimproxy listen and relay
(define (generate-master.cf config)
  (match-record config <postfix-configuration>
      (master.cf-extra)
    (format #f
      "-
       # ============================================================================================================
       # service   type       private  unpriv  chroot  wakeup   maxproc  command + args
       #                      (yes)    (yes)   (no)    (never)  (100)
       # =============================================================================================================


       anvil       unix       -        -       n       -        1        anvil
       bounce      unix       -        -       n       -        0        bounce
       cleanup     unix       n        -       n       -        0        cleanup
       defer       unix       -        -       n       -        0        bounce
       discard     unix       -        -       n       -        -        discard
       error       unix       -        -       n       -        -        error
       flush       unix       n        -       n       1000?    0        flush
       lmtp        unix       -        -       n       -        -        lmtp
       local       unix       -        n       n       -        -        local
       # FIXME: replace 127.0.0.1 with localhost
       pickup      unix       n        -       n       60       1        pickup
         -o content_filter=dksign:[127.0.0.1]:10027
       proxymap    unix       -        -       n       -        -        proxymap
       proxywrite  unix       -        -       n       -        1        proxymap
       qmgr        unix       n        -       n       300      1        qmgr
       relay       unix       -        -       n       -        -        smtp  -o syslog_name=postfix/relay
       retry       unix       -        -       n       -        -        error
       rewrite     unix       -        -       n       -        -        trivial-rewrite
       scache      unix       -        -       n       -        1        scache
       showq       unix       n        -       n       -        -        showq
       smtp        inet       n        -       n       -        -        smtpd -o syslog_name=postfix/smtp
       smtp        unix       -        -       n       -        -        smtp
       submission  inet       n        -       n       -        -        smtpd -o syslog_name=postfix/submission
         -o smtpd_tls_security_level=encrypt
         -o content_filter=dksign:[127.0.0.1]:10027
       tlsmgr      unix       -        -       n       1000?    1        tlsmgr
       trace       unix       -        -       n       -        0        bounce
       verify      unix       -        -       n       -        1        verify
       virtual     unix       -        n       n       -        -        virtual
       postlog     unix-dgram n        -       n       -        1        postlogd

       # FIXME: doesn't work for sendmail -t in localhost
       dksign      unix       -        -       n       -        -        smtp
         -o syslog_name=postfix/dkimproxyout-listen
         -o smtp_send_xforward_command=yes
         -o smtp_discard_ehlo_keywords=8bitmime,starttls
       127.0.0.1:10028 inet   n        -       n       -        -        smtpd
         -o syslog_name=postfix/dkimproxyout-relay
         -o content_filter=
         -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks
         -o smtpd_helo_restrictions=
         -o smtpd_client_restrictions=
         -o smtpd_sender_restrictions=
         -o smtpd_recipient_restrictions=permit_mynetworks,reject
         -o mynetworks=127.0.0.0/8
         -o smtpd_authorized_xforward_hosts=127.0.0.0/8
       ~a
       "
     master.cf-extra)))

(define (cert-for config)
  (match-record config <postfix-configuration>
      (cert-file hostname)
    (or cert-file (format #f "/etc/letsencrypt/live/~a/fullchain.pem" hostname))))

(define (key-for config)
  (match-record config <postfix-configuration>
      (key-file hostname)
    (or key-file (format #f "/etc/letsencrypt/live/~a/privkey.pem" hostname))))

(define (generate-main.cf config)
  (match-record config <postfix-configuration>
      (postfix queue-directory data-directory user setgid-group hostname main.cf-extra)
    (format #f
      "-
       compatibility_level = 3.6

       queue_directory = ~a
       data_directory = ~a
       mail_owner = ~a
       setgid_group = ~a

       myhostname = ~a
       mydestination = $myhostname, $mydomain, localhost.$mydomain, localhost

       alias_maps = hash:/etc/aliases
       # alias_maps = hash:/etc/aliases, static:andreh

       mail_spoo_directory = /var/mail/

       header_checks = regexp:{ { /^Received:.*/ IGNORE }, { /^X-Originating-IP:.*/ IGNORE } }

       smtpd_use_tls = yes
       smtpd_tls_cert_file = ~a
       smtpd_tls_key_file  = ~a
       smtp_use_tls       = $smtpd_use_tls
       smtp_tls_cert_file = $smtpd_tls_cert_file
       smtp_tls_key_file  = $smtpd_tls_key_file

       smtp_tls_security_level  = may

       recipient_delimiter = +

       # smtpd_sasl_security_options = FIXME: deny all
       smtpd_sasl_tls_security_options = noanonymous
       # FIXME: shouldn't this be \"encrypt\"?
       smtpd_tls_security_level = may
       smtpd_tls_auth_only = yes

       smtpd_relay_restrictions = $smtpd_recipient_restrictions
       smtpd_recipient_restrictions = permit_mynetworks,
         permit_sasl_authenticated, reject_unauth_destination
       smtpd_sasl_auth_enable = yes
       cyrus_sasl_config_path = /etc/sasl2
       debug_peer_list = 127.0.0.1

       milter_default_action = accept
       # smtpd_milters = FIXME
       ~a
       "
     queue-directory
     data-directory
     user
     setgid-group
     hostname

     (cert-for config)
     (key-for  config)
     main.cf-extra)))

(define (postfix-etc-files config)
  (match-record config <postfix-configuration>
      (master.cf-file main.cf-file config-dirname)
    `((,config-dirname
       ,(file-union
         config-dirname
         `(("master.cf" ,(plain-file "master.cf" (or master.cf-file (generate-master.cf config))))
           ("main.cf"   ,(plain-file "main.cf"   (or main.cf-file   (generate-main.cf   config))))))))))

(define (postfix-accounts config)
  (match-record config <postfix-configuration>
      (user group setgid-group)
    (list
     (user-account
       (name user)
       (group group)
       (comment "Postfix system user")
       (home-directory "/var/empty")
       (create-home-directory? #f)
       (shell
         (file-append shadow "/sbin/nologin"))
       (system? #t))
     (user-group
       (name group)
       (system? #t))
     (user-group
       (name setgid-group)
       (system? #t)))))

(define (postfix-setuid-programs config)
  (match-record config <postfix-configuration>
      (postfix setgid-group set-sendmail?)
    (append
     (list
      (setuid-program
        (program (file-append postfix "/sbin/postdrop"))
        (setuid? #f)
        (setgid? #t)
        (group setgid-group))
      (setuid-program
        (program (file-append postfix "/sbin/postqueue"))
        (setuid? #f)
        (setgid? #t)
        (group setgid-group)))
     (if set-sendmail?
       (list
        (setuid-program
          (program (file-append postfix "/sbin/sendmail"))
          (setuid? #f)
          (setgid? #t)
          (group setgid-group)))
       '()))))

(define (postfix-activation config)
  (match-record config <postfix-configuration>
      (queue-directory)
    #~(begin
        (use-modules (guix build utils))
        (let ((user (getpwnam "root")))
          (format (current-error-port)
           "Creating Postfix queue directory: \"~a\".~%" #$queue-directory)
          (mkdir-p #$queue-directory)
          (chown #$queue-directory (passwd:uid user) (passwd:gid user))
          (chmod #$queue-directory #o755)
          (format (current-error-port)
           "Creating email spool director: \"/var/mail\".~%")
          (mkdir-p "/var/mail")
          (format (current-error-port)
           "Updating /etc/aliases: FIXME.~%")
          ;; FIXME: add -c option
#;
          (invoke #$(file-append postfix "/sbin/postalias") "/etc/aliases")))))

(define (postfix-shepherd-service config)
  (match-record config <postfix-configuration>
      (postfix config-dirname data-directory queue-directory
       run-in-container? container-name container-namespaces extra-mappings)
    (let* ((config-dir (string-append "/etc/" config-dirname))
           (bin (file-append postfix "/sbin/postfix"))
           (cmd (if (not run-in-container?)
                  bin
                  (least-authority-wrapper
                   bin
                   #:name container-name
                   #:mappings (append
                               (list
                                (file-system-mapping
                                  (source data-directory)
                                  (target source)
                                  (writable? #t))
                                (file-system-mapping
                                  (source queue-directory)
                                  (target source)
                                  (writable? #t)))
                                extra-mappings)
                   #:namespaces container-namespaces))))
      (list
       (shepherd-service
         (provision '(postfix))
         (documentation
            "-
             Run the Postfix MTA.

             This is the entrypoint for starting the \"master\" process.  Then the
             \"master\" process itself takes responsability of starting all the
             required daemons and commands.")
         (start #~(make-forkexec-constructor
                   (list
                    #$(file-append postfix "/sbin/postfix")
                    "-c"
                    #$config-dir
                    "start-fg")
                   #:pid-file "/var/lib/postfix/master.lock"))
         (stop #~(make-kill-destructor SIGKILL))
         (actions
           (list
            (shepherd-action
              (name 'configuration)
              (documentation "FIXME:DOCUMENTATION")
              (procedure
                #~(lambda _
                    (format #t "~a/master.cf~%" #$config-dir)
                    (format #t "~a/main.cf~%"   #$config-dir))))
            (shepherd-action
              (name 'reload)
              (documentation
                 "
                  Re-read the \"master.cf\" and \"main.cf\" configuration files.

                  Daemon processes terminate when possible, and when restarted
                  use the values of the new configuration files.

                  This live-reload option is usually preferable over a stop/start
                  cycle, as it incurs in no interruption of the running service.")
              (procedure
                #~(lambda _
                    (invoke #$(file-append postfix "/sbin/postfix")
                            "-c"
                            #$config-dir
                            "reload")))))))))))

(define (postfix-aliases config)
  (match-record config <postfix-configuration>
      (root-aliases)
    (map (lambda (alias)
           `(,alias "root"))
         root-aliases)))


(define (postfix-nginx-locations config)
  (match-record config <postfix-configuration>
      (hostname)
    (nginx-server-configuration
      (server-name (list (string-append "mta-sts." hostname)))
      (listen '("[::]:443 ssl http2" "443 ssl http2"))
      (ssl-certificate     (cert-for config))
      (ssl-certificate-key (key-for  config))
      (locations
        (list
         (nginx-location-configuration
           (uri "= /.well-known/mta-sts.txt")
           (body
             (list
              (list "alias "
                    (plain-file
                     "mta-sts.txt"
                     (format #f "-
version: STSv1
mode: enforce
mx: ~a
max_age: 604800
"
                      hostname))
                    ";")))))))))

(define (postfix-certificates config)
  (match-record config <postfix-configuration>
      (hostname)
    (list
     (certificate-configuration
       (domains (list hostname (string-append "mta-sts." hostname)))))))

(define (postfix-sasl-service _config)
  (list
   (cyrus-service-configuration
     (name "smtpd.conf"))))


(define postfix-service-type
  (service-type
    (name 'postfix)
    (extensions
      (list
       (service-extension etc-service-type
                          postfix-etc-files)
       (service-extension account-service-type
                          postfix-accounts)
       (service-extension setuid-program-service-type
                          postfix-setuid-programs)
       (service-extension activation-service-type
                          postfix-activation)
       (service-extension mail-aliases-service-type
                          postfix-aliases)
       (service-extension profile-service-type
                          (compose list postfix-configuration-postfix))
       (service-extension shepherd-root-service-type
                          postfix-shepherd-service)
       (service-extension nginx-service-type
                          postfix-nginx-locations)
       (service-extension certbot-service-type
                          postfix-certificates)
       (service-extension cyrus-sasl-service-type
                          postfix-sasl-services)))
    (default-value (postfix-configuration))
    (description
       "
        Run the Postfix MTA.

        This is the top-level system service for Postfix.

        It includes:
        - populating /etc/postfix/ with read-only configuration files;
        - the user and groups used by Postfix when handling email delivery;
        - the special setgid binaries for daily usage, such as \"sendmail\";
        - the Shepherd service for starting, stopping and *reloading* the
          service without restarting it;
        - the activation script for creating the required directories and
          configuring them with the correct permissions;
        - the binaries in the system profile so that one doesn't need to explicilty
          include the package when the service is already enabled.

        An extension to the log-rotation service isn't included: the default
        rottlog configuration already includes /var/log/maillog in its routine,
        so it is kept out.

        The defaults of <postfix-configuration> provide sane default values for
        most things, such as group names, data and queue directories, etc.  When
        used as-is, it creates a Postfix server that sends email from local users
        of the domain provided by \"/etc/hostname\".")))



;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Dovecot ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;



(define-record-type* <dovecot2-configuration>
  dovecot2-configuration
  make-dovecot2-configuration
  dovecot2-configuration?
  (dovecot2          dovecot2-configuration-dovecot2          (default dovecot))
  (raw-file          dovecot2-configuration-raw-file          (default #f))
  (extra-content     dovecot2-configuration-extra-content     (default ""))
  (config-name       dovecot2-configuration-config-name       (default "dovecot2.conf"))
  (user              dovecot2-configuration-user              (default "dovecot2"))
  (group             dovecot2-configuration-group             (default "dovecot2"))
  (auth-worker-group dovecot2-configuration-auth-worker-group (default "etc-shadow"))
  (untrusted-user    dovecot2-configuration-untrusted-user    (default "dovenull2"))
  (untrusted-group   dovecot2-configuration-untrusted-group   (default "dovenull2"))
  (base-dir          dovecot2-configuration-base-dir          (default "/var/run/dovecot2"))
  (state-dir         dovecot2-configuration-state-dir         (default "/var/lib/dovecot2"))
  (hostname          dovecot2-configuration-hostname          (default (gethostname))))

(define (generate-dovecot-config config)
  (match-record config <dovecot2-configuration>
      (user group auth-worker-group untrusted-user
       hostname base-dir state-dir extra-content)
    (format #f
      "
       protocols = imap

       default_internal_user = ~a
       default_internal_group = ~a
       default_login_user = ~a
       auth_mechanisms = plain login
       auth_username_format = %n

       passdb {
         driver = shadow
       }
       userdb {
         driver = passwd
       }
       service auth-worker {
         group = ~a
       }


       ssl = required
       ssl_cert = </etc/letsencrypt/live/~a/fullchain.pem
       ssl_key  = </etc/letsencrypt/live/~a/privkey.pem
       ssl_dh = <~a/dhparam.pem

       base_dir = ~a
       state_dir = ~a

       verbose_proctitle = yes

       # FIXMEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
       # mail_location = maildir:~~/Mail:INBOX=~~/Mail/Inbox:LAYOUT=fs
       # mail_location = maildir:~~/Mail:INBOX=~~/Mail/Inbox:LAYOUT=fs

       # FIXME:
       # mail_plugins


       namespace inbox {
         inbox = yes
         mailbox Drafts {
           special_use = \Drafts
           auto = subscribe
         }
         mailbox Sent {
           special_use = \Sent
           auto = subscribe
         }
         mailbox Archive {
           special_use = \Archive
           auto = subscribe
         }
         mailbox Spam {
           special_use = \Junk
           auto = subscribe
           autoexpunge = 30d
         }
         mailbox Trash {
           special_use = \Trash
           auto = subscribe
         }
       }
       ~a
       "
     user
     group
     untrusted-user
     auth-worker-group
     hostname
     hostname
     state-dir
     base-dir
     state-dir
     extra-content)))

(define (dovecot2-etc-files config)
  (match-record config <dovecot2-configuration>
      (raw-file config-name)
    `((,config-name ,(plain-file config-name
                                 (or raw-file
                                     (generate-dovecot-config config)))))))

(define (dovecot2-accounts config)
  (match-record config <dovecot2-configuration>
      (user group untrusted-user untrusted-group)
    (list
     (user-account
       (name user)
       (group group)
       (comment "Dovecot system user")
       (home-directory "/var/empty")
       (create-home-directory? #f)
       (shell
         (file-append shadow "/sbin/nologin"))
       (system? #t))
     (user-account
       (name untrusted-user)
       (group untrusted-group)
       (comment "Dovecot user for untrusted logins")
       (home-directory "/var/empty")
       (create-home-directory? #f)
       (shell
         (file-append shadow "/sbin/nologin"))
       (system? #t))
     (user-group
       (name group)
       (system? #t))
     (user-group
       (name untrusted-group)
       (system? #t)))))

(define (dovecot2-activation config)
  (match-record config <dovecot2-configuration>
      (base-dir state-dir)
    #~(begin
        (use-modules (guix build utils))
        (let ((user (getpwnam "root")))
          (format (current-error-port)
           "Creating Dovecot base_dir directory: \"~a\".~%" #$base-dir)
          (mkdir-p #$base-dir)
          (let ((dhparam.pem (string-append #$state-dir "/dhparam.pem")))
            (unless (file-exists? dhparam.pem)
              (format (current-error-port)
               "dhparam.pem file doesn't exist yet.  Generating one...~%")
              (cond
               ((zero? (system* (string-append #$openssl "/bin/openssl")
                                "dhparam" "-out" dhparam.pem "2048"))
                (format (current-error-port)
                 "Dovecot2 dhparam.pem file created: \"~a\".~%" dhparam.pem))
               (else
                (format (current-error-port)
                        "Failed to create dhparam.pem file: \"~a\".~%" dhparam.pem)))))))))

(define (dovecot2-shepherd-service config)
  (match-record config <dovecot2-configuration>
      (dovecot2 config-name)
    (let ((config-file (string-append "/etc/" config-name)))
      (list
       (shepherd-service
         (provision '(dovecot2))
         (documentation "FIXME:DOCUMENTATION: heredoc syntax")
         (start #~(make-forkexec-constructor
                   (list
                    #$(file-append dovecot2 "/sbin/dovecot")
                    "-F"
                    "-c"
                    #$config-file)))
         (stop #~(make-kill-destructor))
         (actions
           (list
            (shepherd-action
              (name 'configuration)
              (documentation "FIXME:DOCUMENTATION: heredoc syntax")
              (procedure
                #~(lambda _
                    (format #t "~a~%" #$config-file))))
            (shepherd-action
              (name 'reload)
              (documentation "FIXME:DOCUMENTATION: heredoc syntax")
              (procedure
                #~(lambda _
                    (invoke #$(file-append dovecot "/bin/doveadm")
                            "-c"
                            #$config-file
                            "reload")))))))))))

(define dovecot2-service-type
  (service-type
    (name 'dovecot2)
    (extensions
      (list
       (service-extension etc-service-type
                          dovecot2-etc-files)
       (service-extension account-service-type
                          dovecot2-accounts)
       (service-extension activation-service-type
                          dovecot2-activation)
       (service-extension profile-service-type
                          (compose list dovecot2-configuration-dovecot2))
       (service-extension shepherd-root-service-type
                          dovecot2-shepherd-service)))
    (default-value (dovecot2-configuration))
    (description "FIXME:DOCUMENTATION: heredoc syntax")))

;; FIXME
;; automate personal server with:
;; - euandreh:git-service-type
;; - euandreh:mail-service-type

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