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;;; Consfigurator -- Lisp declarative configuration management system
;;; Copyright (C) 2021 Sean Whitton <spwhitton@spwhitton.name>
;;; This file 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, or (at your option)
;;; any later version.
;;; This file 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 this program. If not, see <http://www.gnu.org/licenses/>.
(in-package :consfigurator.property.apt)
(named-readtables:in-readtable :consfigurator)
;;;; Static definitions
(defmacro with-maybe-update (form)
`(handler-case ,form
(run-failed ()
(updated)
,form)))
(defmacro with-changes-dpkg-status (&body forms)
`(with-change-if-changes-file-content ("/var/lib/dpkg/status") ,@forms))
(define-constant +sections+ '("main" "contrib" "non-free") :test #'equal)
(define-constant +noninteractive-env+ '(:DEBIAN_FRONTEND "noninteractive"
:APT_LISTCHANGES_FRONTEND "none")
:test #'equal)
;;;; Properties
(defprop installed :posix (&rest packages)
"Ensure all of the apt packages PACKAGES are installed."
(:desc #?"apt installed @{packages}")
(:preprocess (flatten packages))
(:hostattrs
(declare (ignore packages))
(os:required 'os:debianlike))
(:check
(all-installed-p packages))
(:apply
(with-maybe-update (apt-get :inform "-y" "install" packages))))
(defprop removed :posix (&rest packages)
"Ensure all of the apt packages PACKAGES are removed."
(:desc #?"apt removed @{packages}")
(:preprocess (flatten packages))
(:hostattrs
(declare (ignore packages))
(os:required 'os:debianlike))
(:check
(none-installed-p packages))
(:apply
(apt-get :inform "-y" "remove" packages)))
(defprop reconfigured :posix (package &rest triples)
"Where each of TRIPLES is a list of three strings, a debconf template, type
and value, debconf reconfigure PACKAGE with those new debconf values.
Typically used with the ON-CHANGE combinator."
(:desc (declare (ignore triples)) #?"${package} reconfigured")
(:hostattrs
(declare (ignore package triples))
(os:required 'os:debianlike))
(:apply
(assert-euid-root)
(run
:input (loop for triple in triples collect #?"${package} @{triple}")
"debconf-set-selections")
(run :env +noninteractive-env+ "dpkg-reconfigure" "-fnone" package)))
(defproplist service-installed-running :posix (package)
"Where PACKAGE installs a service named PACKAGE, ensure it is installed and
running.
E.g. (APT:SERVICE-INSTALLED-RUNNING \"apache2\")."
(:desc #?"${package} installed and running")
(installed package)
(service:running package))
(defprop all-configured :posix ()
"Ensure that there are no packages for which installation is unfinished."
(:desc "dpkg --configure --pending")
(:hostattrs (os:required 'os:debianlike))
(:apply
(with-changes-dpkg-status
(run :env +noninteractive-env+ "dpkg" "--configure" "--pending"))))
(defproplist updated :posix ()
"Ensure the apt indexes are up-to-date."
(:desc "apt-get update")
(all-configured)
(os:etypecase
(debian-stable
(cmd:single :env +noninteractive-env+ :inform "apt-get" "update"))
(debian
(cmd:single :env +noninteractive-env+ :inform
"apt-get" "update" "--allow-releaseinfo-change"))))
(defprop upgraded :posix ()
(:desc "apt upgraded")
(:hostattrs (os:required 'os:debianlike))
(:apply (with-changes-dpkg-status
(apt-get :inform "-y" "dist-upgrade"))))
(defprop autoremoved :posix ()
(:desc "apt removed automatically installed packages")
(:hostattrs (os:required 'os:debianlike))
(:apply (with-changes-dpkg-status
(apt-get :inform "-y" "autoremove"))))
(defprop periodic-updates :posix ()
"Enable periodically updating the apt indexes and downloading new versions of
packages. Does not do any automatic upgrades."
(:desc "apt periodic updates")
(:hostattrs (os:required 'os:debianlike))
(:apply
(file:has-content "/etc/apt/apt.conf.d/02periodic"
#>EOF>APT::Periodic::Enable "1";
APT::Periodic::Update-Package-Lists "1";
APT::Periodic::Download-Upgradeable-Packages "1";
APT::Periodic::Verbose "1";
EOF))
(:unapply
(file:does-not-exist "/etc/apt/apt.conf.d/02periodic")))
(defproplist unattended-upgrades :posix ()
"Enable unattended upgrades.
Note that in its default configuration on Debian, unattended-upgrades will
only upgrade Debian stable."
(:desc "Unattended upgrades enabled")
(on-change (installed "unattended-upgrades")
(reconfigured
"unattended-upgrades"
'("unattended-upgrades/enable_auto_updates" "boolean" "true")))
(service:running "cron")
(desc "unattended-upgrades will mail root"
(file:contains-lines "/etc/apt/apt.conf.d/50unattended-upgrades"
"Unattended-Upgrade::Mail \"root\";"))
;; work around Debian bug #812380
(file:does-not-exist "/etc/apt/apt.conf.d/50unattended-upgrades.ucf-dist"))
(defprop mirror :posix (uri)
(:desc #?"${uri} apt mirror selected")
(:hostattrs
(pushnew-hostattrs :apt.mirror uri)))
(defproplist uses-parent-mirror :posix ()
(:desc #?"Uses parent's apt mirror")
(mirror (or (get-parent-hostattrs-car :apt.mirror)
(failed-change "Parent has no apt mirror"))))
(defprop proxy :posix (uri)
(:desc #?"${uri} apt proxy selected")
(:hostattrs
(pushnew-hostattrs :apt.proxy uri))
(:apply
(file:has-content "/etc/apt/apt.conf.d/20proxy"
(format nil "Acquire::HTTP::Proxy \"~A\";~%" uri))))
(defproplist uses-parent-proxy :posix ()
(:desc #?"Uses parent's apt proxy")
(proxy (or (get-parent-hostattrs-car :apt.proxy)
(failed-change "Parent has no apt proxy"))))
(defproplist uses-local-cacher :posix ()
(:desc "apt uses local apt cacher")
(service-installed-running "apt-cacher-ng")
(proxy "http://localhost:3142"))
(defun get-mirrors ()
(or (get-hostattrs :apt.mirror) (call-with-os #'get-default-mirrors)))
(defmethod get-default-mirrors ((os os:debian))
'("http://deb.debian.org/debian"))
(defprop standard-sources.list :posix ()
(:desc "Standard sources.list")
(:apply
(file:has-content "/etc/apt/sources.list"
(call-with-os #'standard-sources-for))))
(defmethod standard-sources-for ((os os:debian))
(let* ((suite (os:debian-suite os))
(archive (mapcar (lambda (m) (list* m suite +sections+))
(get-mirrors)))
(security-suite (if (memstring= suite '("stretch" "jessie" "buster"))
#?"${suite}/updates"
#?"${suite}-security"))
(security (and (not (subtypep (type-of os) 'os:debian-unstable))
(list
(list* "http://security.debian.org/debian-security"
security-suite +sections+)))))
(mapcan (lambda (l) (list #?"deb @{l}" #?"deb-src @{l}"))
(nconc archive security))))
(defprop cache-cleaned :posix ()
"Empty apt's cache to recover disk space."
(:desc "apt cache cleaned")
(:hostattrs (os:required 'os:debianlike))
(:apply (apt-get "clean") :no-change))
;;;; Reports on installation status
(defun apt-cache-policy (packages)
(runlines :env '(:LANG "C") "apt-cache" "policy" packages))
(define-constant apt-cache-policy-installed #?/^\s+Installed:\s+(?!\(none\))/
:test #'string=)
(defun all-installed-p (&rest packages)
(loop with n = 0
with packages* = (flatten packages)
for line in (apt-cache-policy packages*)
when (re:scan apt-cache-policy-installed line)
do (incf n)
finally (return (= n (length packages*)))))
(defun none-installed-p (&rest packages)
(loop for line in (apt-cache-policy (flatten packages))
never (re:scan apt-cache-policy-installed line)))
;;;; Utilities
(defun apt-get (&rest args)
(apply #'run :env +noninteractive-env+ "apt-get" args))
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