Revert "services: Add ddclient service."

ddclient is unmaintained as of 2023-07-04 [1] and this service has been broken
for a while [2]. Remove it rather than shipping a broken service for an
unmaintained program that's unlikely to be fixed.

[1]: <https://github.com/ddclient/ddclient>
[2]: <https://issues.guix.gnu.org/52770>

This reverts commit 8490a8346b5c8207f5798be55bea1de865b0bd42.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

2 files changed, 1 insertions, 274 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index e2e61f0f2d..633d62bd98 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -32563,113 +32563,6 @@ network or obtained a DHCP lease from dnsmasq.
 @end table
 @end deftp
 
-@subsubheading ddclient Service
-
-@cindex ddclient
-The ddclient service described below runs the ddclient daemon, which takes
-care of automatically updating DNS entries for service providers such as
-@uref{https://dyn.com/dns/, Dyn}.
-
-The following example show instantiates the service with its default
-configuration:
-
-@lisp
-(service ddclient-service-type)
-@end lisp
-
-Note that ddclient needs to access credentials that are stored in a
-@dfn{secret file}, by default @file{/etc/ddclient/secrets} (see
-@code{secret-file} below).  You are expected to create this file manually, in
-an ``out-of-band'' fashion (you @emph{could} make this file part of the
-service configuration, for instance by using @code{plain-file}, but it will be
-world-readable @i{via} @file{/gnu/store}).  See the examples in the
-@file{share/ddclient} directory of the @code{ddclient} package.
-
-@c %start of fragment
-
-Available @code{ddclient-configuration} fields are:
-
-@deftypevr {@code{ddclient-configuration} parameter} package ddclient
-The ddclient package.
-
-@end deftypevr
-
-@deftypevr {@code{ddclient-configuration} parameter} integer daemon
-The period after which ddclient will retry to check IP and domain name.
-
-Defaults to @samp{300}.
-
-@end deftypevr
-
-@deftypevr {@code{ddclient-configuration} parameter} boolean syslog
-Use syslog for the output.
-
-Defaults to @samp{#t}.
-
-@end deftypevr
-
-@deftypevr {@code{ddclient-configuration} parameter} string mail
-Mail to user.
-
-Defaults to @samp{"root"}.
-
-@end deftypevr
-
-@deftypevr {@code{ddclient-configuration} parameter} string mail-failure
-Mail failed update to user.
-
-Defaults to @samp{"root"}.
-
-@end deftypevr
-
-@deftypevr {@code{ddclient-configuration} parameter} string pid
-The ddclient PID file.
-
-Defaults to @samp{"/var/run/ddclient/ddclient.pid"}.
-
-@end deftypevr
-
-@deftypevr {@code{ddclient-configuration} parameter} boolean ssl
-Enable SSL support.
-
-Defaults to @samp{#t}.
-
-@end deftypevr
-
-@deftypevr {@code{ddclient-configuration} parameter} string user
-Specifies the user name or ID that is used when running ddclient
-program.
-
-Defaults to @samp{"ddclient"}.
-
-@end deftypevr
-
-@deftypevr {@code{ddclient-configuration} parameter} string group
-Group of the user who will run the ddclient program.
-
-Defaults to @samp{"ddclient"}.
-
-@end deftypevr
-
-@deftypevr {@code{ddclient-configuration} parameter} string secret-file
-Secret file which will be appended to @file{ddclient.conf} file.  This
-file contains credentials for use by ddclient.  You are expected to
-create it manually.
-
-Defaults to @samp{"/etc/ddclient/secrets.conf"}.
-
-@end deftypevr
-
-@deftypevr {@code{ddclient-configuration} parameter} list extra-options
-Extra options will be appended to @file{ddclient.conf} file.
-
-Defaults to @samp{'()}.
-
-@end deftypevr
-
-
-@c %end of fragment
-
 @node VNC Services
 @subsection VNC Services
 @cindex VNC (virtual network computing)
diff --git a/gnu/services/dns.scm b/gnu/services/dns.scm
index f45fc99c69..6608046909 100644
--- a/gnu/services/dns.scm
+++ b/gnu/services/dns.scm
@@ -1,6 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2017 Julien Lepiller <julien@lepiller.eu>
-;;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
 ;;; Copyright © 2020 Pierre Langlois <pierre.langlois@gmx.com>
 ;;; Copyright © 2021 Maxime Devos <maximedevos@telenet.be>
 ;;; Copyright © 2022 Remco van 't Veer <remco@remworks.net>
@@ -53,10 +52,7 @@
             knot-resolver-configuration
 
             dnsmasq-service-type
-            dnsmasq-configuration
-
-            ddclient-service-type
-            ddclient-configuration))
+            dnsmasq-configuration))
 
 ;;;
 ;;; Knot DNS.
@@ -901,165 +897,3 @@ cache.size = 100 * MB
                              dnsmasq-activation)))
    (default-value (dnsmasq-configuration))
    (description "Run the dnsmasq DNS server.")))
-
-
-;;;
-;;; ddclient
-;;;
-
-(define (uglify-field-name field-name)
-  (string-delete #\? (symbol->string field-name)))
-
-(define (serialize-field field-name val)
-  (when (not (member field-name '(group secret-file user)))
-    (format #t "~a=~a\n" (uglify-field-name field-name) val)))
-
-(define (serialize-boolean field-name val)
-  (serialize-field field-name (if val "yes" "no")))
-
-(define (serialize-integer field-name val)
-  (serialize-field field-name (number->string val)))
-
-(define (serialize-string field-name val)
-  (if (and (string? val) (string=? val ""))
-      ""
-      (serialize-field field-name val)))
-
-(define (serialize-list field-name val)
-  (if (null? val) "" (serialize-field field-name (string-join val))))
-
-(define (serialize-extra-options extra-options)
-  (string-join extra-options "\n" 'suffix))
-
-(define-configuration ddclient-configuration
-  (ddclient
-   (file-like ddclient)
-   "The ddclient package.")
-  (daemon
-   (integer 300)
-   "The period after which ddclient will retry to check IP and domain name.")
-  (syslog
-   (boolean #t)
-   "Use syslog for the output.")
-  (mail
-   (string "root")
-   "Mail to user.")
-  (mail-failure
-   (string "root")
-   "Mail failed update to user.")
-  (pid
-   (string "/var/run/ddclient/ddclient.pid")
-   "The ddclient PID file.")
-  (ssl
-   (boolean #t)
-   "Enable SSL support.")
-  (user
-   (string "ddclient")
-   "Specifies the user name or ID that is used when running ddclient
-program.")
-  (group
-   (string "ddclient")
-   "Group of the user who will run the ddclient program.")
-  (secret-file
-   (string "/etc/ddclient/secrets.conf")
-   "Secret file which will be appended to @file{ddclient.conf} file.  This
-file contains credentials for use by ddclient.  You are expected to create it
-manually.")
-  (extra-options
-   (list '())
-   "Extra options will be appended to @file{ddclient.conf} file."))
-
-(define (ddclient-account config)
-  "Return the user accounts and user groups for CONFIG."
-  (let ((ddclient-user (ddclient-configuration-user config))
-        (ddclient-group (ddclient-configuration-group config)))
-    (list (user-group
-           (name ddclient-group)
-           (system? #t))
-          (user-account
-           (name ddclient-user)
-           (system? #t)
-           (group ddclient-group)
-           (comment "ddclientd privilege separation user")
-           (home-directory (string-append "/var/run/" ddclient-user))))))
-
-(define (ddclient-activation config)
-  "Return the activation GEXP for CONFIG."
-  (with-imported-modules '((guix build utils))
-    #~(begin
-        (use-modules (guix build utils)
-                     (ice-9 rdelim))
-        (let ((ddclient-user
-               (passwd:uid (getpw #$(ddclient-configuration-user config))))
-              (ddclient-group
-               (passwd:gid (getpw #$(ddclient-configuration-group config))))
-              (ddclient-secret-file
-               #$(ddclient-configuration-secret-file config)))
-          ;; 'ddclient' complains about ddclient.conf file permissions, which
-          ;; rules out /gnu/store.  Thus we copy the ddclient.conf to /etc.
-          (for-each (lambda (dir)
-                      (mkdir-p dir)
-                      (chmod dir #o700)
-                      (chown dir ddclient-user ddclient-group))
-                    '("/var/cache/ddclient" "/var/run/ddclient"
-                      "/etc/ddclient"))
-          (with-output-to-file "/etc/ddclient/ddclient.conf"
-            (lambda ()
-              (display
-               (string-append
-                "# Generated by 'ddclient-service'.\n\n"
-                #$(with-output-to-string
-                    (lambda ()
-                      (serialize-configuration config
-                                               ddclient-configuration-fields)))
-                (if (string-null? ddclient-secret-file)
-                    ""
-                    (format #f "\n\n# Appended from '~a'.\n\n~a"
-                            ddclient-secret-file
-                            (with-input-from-file ddclient-secret-file
-                              read-string)))))))
-          (chmod "/etc/ddclient/ddclient.conf" #o600)
-          (chown "/etc/ddclient/ddclient.conf"
-                 ddclient-user ddclient-group)))))
-
-(define (ddclient-shepherd-service config)
-  "Return a <shepherd-service> for ddclient with CONFIG."
-  (let ((ddclient (ddclient-configuration-ddclient config))
-        (ddclient-pid (ddclient-configuration-pid config))
-        (ddclient-user (ddclient-configuration-user config))
-        (ddclient-group (ddclient-configuration-group config)))
-    (list (shepherd-service
-           (provision '(ddclient))
-           (documentation "Run ddclient daemon.")
-           (start #~(make-forkexec-constructor
-                     (list #$(file-append ddclient "/bin/ddclient")
-                           "-foreground"
-                           "-file" "/etc/ddclient/ddclient.conf")
-                     #:pid-file #$ddclient-pid
-                     #:environment-variables
-                     (list "SSL_CERT_DIR=/run/current-system/profile\
-/etc/ssl/certs"
-                           "SSL_CERT_FILE=/run/current-system/profile\
-/etc/ssl/certs/ca-certificates.crt")
-                     #:user #$ddclient-user
-                     #:group #$ddclient-group))
-           (stop #~(make-kill-destructor))))))
-
-(define ddclient-service-type
-  (service-type
-   (name 'ddclient)
-   (extensions
-    (list (service-extension account-service-type
-                             ddclient-account)
-          (service-extension shepherd-root-service-type
-                             ddclient-shepherd-service)
-          (service-extension activation-service-type
-                             ddclient-activation)))
-   (default-value (ddclient-configuration))
-   (description "Configure address updating utility for dynamic DNS services,
-ddclient.")))
-
-(define (generate-ddclient-documentation)
-  (generate-documentation
-   `((ddclient-configuration ,ddclient-configuration-fields))
-   'ddclient-configuration))