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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2023 Tanguy Le Carrour <tanguy@bioneland.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix 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 General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu home services mail)
#:use-module (guix gexp)
#:use-module (gnu services)
#:use-module (gnu services configuration)
#:use-module (gnu home services)
#:use-module (gnu home services shepherd)
#:use-module (gnu packages mail)
#:use-module (ice-9 string-fun)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:export (home-msmtp-configuration
home-msmtp-configuration?
home-msmtp-configuration-defaults
home-msmtp-configuration-accounts
home-msmtp-configuration-default-account
home-msmtp-configuration-extra-content
home-msmtp-service-type
msmtp-configuration
msmtp-configuration-auth?
msmtp-configuration-tls?
msmtp-configuration-tls-starttls?
msmtp-configuration-tls-trust-file
msmtp-configuration-log-file
msmtp-configuration-host
msmtp-configuration-port
msmtp-configuration-user
msmtp-configuration-from
msmtp-configuration-password-eval
msmtp-configuration-extra-content
msmtp-account
msmtp-account-name
msmtp-account-configuration))
(define-maybe string (prefix msmtp-configuration-))
(define-maybe boolean (prefix msmtp-configuration-))
(define-maybe integer (prefix msmtp-configuration-))
;; Serialization of 'msmtp'.
(define (uglify-symbol field-name)
(let* ((name (symbol->string field-name))
(ugly-name (string-replace-substring name "-" "_")))
(if (string-suffix? "?" ugly-name)
(string-drop-right ugly-name 1)
ugly-name)))
(define (msmtp-configuration-serialize-boolean field-name value)
#~(string-append #$(uglify-symbol field-name) " "
(if #$value "on" "off") "\n"))
(define (msmtp-configuration-serialize-string field-name value)
#~(string-append #$(uglify-symbol field-name) " " #$value "\n"))
(define (msmtp-configuration-serialize-maybe-string-no-underscore field-name value)
#~(if #$(maybe-value-set? value)
(string-append
#$(string-replace-substring (uglify-symbol field-name) "_" "") " " #$value "\n")
""))
(define (msmtp-configuration-serialize-integer field-name value)
#~(string-append #$(uglify-symbol field-name) " "
(number->string #$value) "\n"))
(define (msmtp-configuration-serialize-extra-content field-name value)
#~(if (string=? #$value "") "" (string-append #$value "\n")))
(define (msmtp-account-serialize-name field-name value)
#~(string-append "\naccount " #$value "\n"))
(define (msmtp-account-serialize-msmtp-configuration field-name value)
#~(string-append #$(serialize-configuration value msmtp-configuration-fields)))
(define (home-msmtp-configuration-serialize-list-of-msmtp-accounts field-name value)
#~(string-append #$@(map (cut serialize-configuration <> msmtp-account-fields)
value)))
(define (home-msmtp-configuration-serialize-msmtp-configuration field-name value)
#~(string-append "defaults\n"
#$(serialize-configuration value msmtp-configuration-fields)))
(define (home-msmtp-configuration-serialize-default-account field-name value)
#~(if #$(maybe-value-set? value)
(string-append "\naccount default : " #$value "\n")
""))
(define (home-msmtp-configuration-serialize-extra-content field-name value)
#~(if (string=? #$value "") "" (string-append #$value "\n")))
;; Configuration of 'msmtp'.
;; Source <https://marlam.de/msmtp/msmtp.html#Configuration-files>.
(define-configuration msmtp-configuration
(auth?
maybe-boolean
"Enable or disable authentication.")
(tls?
maybe-boolean
"Enable or disable TLS (also known as SSL) for secured connections.")
(tls-starttls?
maybe-boolean
"Choose the TLS variant: start TLS from within the session (‘on’, default),
or tunnel the session through TLS (‘off’).")
(tls-trust-file
maybe-string
"Activate server certificate verification using a list of
trusted Certification Authorities (CAs).")
(log-file
maybe-string
"Enable logging to the specified file. An empty argument disables logging.
The file name ‘-’ directs the log information to standard output."
(serializer msmtp-configuration-serialize-maybe-string-no-underscore))
(host
maybe-string
"The SMTP server to send the mail to.")
(port
maybe-integer
"The port that the SMTP server listens on. The default is 25 (\"smtp\"),
unless TLS without STARTTLS is used, in which case it is 465 (\"smtps\").")
(user
maybe-string
"Set the user name for authentication.")
(from
maybe-string
"Set the envelope-from address.")
(password-eval
maybe-string
"Set the password for authentication to the output (stdout) of the command cmd."
(serializer msmtp-configuration-serialize-maybe-string-no-underscore))
(extra-content
(string "")
"Extra content appended as-is to the configuration block. Run
@command{man msmtp} for more information about the configuration file
format."
(serializer msmtp-configuration-serialize-extra-content))
(prefix msmtp-configuration-))
(define-configuration msmtp-account
(name
(string)
"The unique name of the account."
(serializer msmtp-account-serialize-name))
(configuration
(msmtp-configuration)
"The configuration for this given account.")
(prefix msmtp-account-))
(define (list-of-msmtp-accounts? lst)
(every msmtp-account? lst))
(define-configuration home-msmtp-configuration
(defaults
(msmtp-configuration (msmtp-configuration))
"The configuration that will be set as default for all accounts.")
(accounts
(list-of-msmtp-accounts '())
"A list of @code{msmtp-account} records which contain
information about all your accounts.")
(default-account
maybe-string
"Set the default account."
(serializer home-msmtp-configuration-serialize-default-account))
(extra-content
(string "")
"Extra content appended as-is to the configuration file. Run
@command{man msmtp} for more information about the configuration file
format."
(serializer home-msmtp-configuration-serialize-extra-content))
(prefix home-msmtp-configuration-))
(define (home-msmtp-files config)
(list
`(".config/msmtp/config"
,(mixed-text-file "msmtp-config"
(serialize-configuration config home-msmtp-configuration-fields)))))
(define (home-msmtp-profile-entries config)
(list msmtp))
(define home-msmtp-service-type
(service-type (name 'home-msmtp)
(extensions
(list (service-extension home-profile-service-type
home-msmtp-profile-entries)
(service-extension home-files-service-type
home-msmtp-files)))
(default-value (home-msmtp-configuration))
(description "Configure msmtp, a simple
@acronym{SMTP, Simple Mail Transfer Protocol} client that can relay email
to SMTP servers.")))
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