mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-25 22:08:16 -05:00
a237f0d436
* gnu/services/backup.scm: New file. * gnu/local.mk: Add this. * doc/guix.texi: Document this. Change-Id: I9efd5559bb445b484107a7c27c2d0a65ccad1e66 Signed-off-by: Ludovic Courtès <ludo@gnu.org>
236 lines
8 KiB
Scheme
236 lines
8 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
|
;;; Copyright © 2024 Giacomo Leidi <goodoldpaul@autistici.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 services backup)
|
|
#:use-module (gnu packages backup)
|
|
#:use-module (gnu services)
|
|
#:use-module (gnu services configuration)
|
|
#:use-module (gnu services mcron)
|
|
#:use-module (guix build-system copy)
|
|
#:use-module (guix gexp)
|
|
#:use-module ((guix licenses)
|
|
#:prefix license:)
|
|
#:use-module (guix modules)
|
|
#:use-module (guix packages)
|
|
#:use-module (srfi srfi-1)
|
|
#:export (restic-backup-job
|
|
restic-backup-job?
|
|
restic-backup-job-fields
|
|
restic-backup-job-restic
|
|
restic-backup-job-user
|
|
restic-backup-job-name
|
|
restic-backup-job-repository
|
|
restic-backup-job-password-file
|
|
restic-backup-job-schedule
|
|
restic-backup-job-files
|
|
restic-backup-job-verbose?
|
|
restic-backup-job-extra-flags
|
|
|
|
restic-backup-configuration
|
|
restic-backup-configuration?
|
|
restic-backup-configuration-fields
|
|
restic-backup-configuration-jobs
|
|
|
|
restic-backup-job-program
|
|
restic-backup-job->mcron-job
|
|
restic-guix
|
|
restic-guix-wrapper-package
|
|
restic-backup-service-profile
|
|
restic-backup-service-type))
|
|
|
|
(define (gexp-or-string? value)
|
|
(or (gexp? value)
|
|
(string? value)))
|
|
|
|
(define (lowerable? value)
|
|
(or (file-like? value)
|
|
(gexp-or-string? value)))
|
|
|
|
(define list-of-lowerables?
|
|
(list-of lowerable?))
|
|
|
|
(define-configuration/no-serialization restic-backup-job
|
|
(restic
|
|
(package restic)
|
|
"The restic package to be used for the current job.")
|
|
(user
|
|
(string "root")
|
|
"The user used for running the current job.")
|
|
(name
|
|
(string)
|
|
"A string denoting a name for this job.")
|
|
(repository
|
|
(string)
|
|
"The restic repository target of this job.")
|
|
(password-file
|
|
(string)
|
|
"Name of the password file, readable by the configured @code{user}, that
|
|
will be used to set the @code{RESTIC_PASSWORD} environment variable for the
|
|
current job.")
|
|
(schedule
|
|
(gexp-or-string)
|
|
"A string or a gexp that will be passed as time specification in the mcron
|
|
job specification (@pxref{Syntax, mcron job specifications,, mcron,
|
|
GNU@tie{}mcron}).")
|
|
(files
|
|
(list-of-lowerables '())
|
|
"The list of files or directories to be backed up. It must be a list of
|
|
values that can be lowered to strings.")
|
|
(verbose?
|
|
(boolean #f)
|
|
"Whether to enable verbose output for the current backup job.")
|
|
(extra-flags
|
|
(list-of-lowerables '())
|
|
"A list of values that are lowered to strings. These will be passed as
|
|
command-line arguments to the current job @command{restic backup} invokation."))
|
|
|
|
(define list-of-restic-backup-jobs?
|
|
(list-of restic-backup-job?))
|
|
|
|
(define-configuration/no-serialization restic-backup-configuration
|
|
(jobs
|
|
(list-of-restic-backup-jobs '())
|
|
"The list of backup jobs for the current system."))
|
|
|
|
(define (restic-backup-job-program config)
|
|
(let ((restic
|
|
(file-append (restic-backup-job-restic config) "/bin/restic"))
|
|
(repository
|
|
(restic-backup-job-repository config))
|
|
(password-file
|
|
(restic-backup-job-password-file config))
|
|
(files
|
|
(restic-backup-job-files config))
|
|
(extra-flags
|
|
(restic-backup-job-extra-flags config))
|
|
(verbose
|
|
(if (restic-backup-job-verbose? config)
|
|
'("--verbose")
|
|
'())))
|
|
(program-file
|
|
"restic-backup-job.scm"
|
|
#~(begin
|
|
(use-modules (ice-9 popen)
|
|
(ice-9 rdelim))
|
|
(setenv "RESTIC_PASSWORD"
|
|
(with-input-from-file #$password-file read-line))
|
|
|
|
(execlp #$restic #$restic #$@verbose
|
|
"-r" #$repository
|
|
#$@extra-flags
|
|
"backup" #$@files)))))
|
|
|
|
(define (restic-guix jobs)
|
|
(program-file
|
|
"restic-guix"
|
|
#~(begin
|
|
(use-modules (ice-9 match)
|
|
(srfi srfi-1))
|
|
|
|
(define names '#$(map restic-backup-job-name jobs))
|
|
(define programs '#$(map restic-backup-job-program jobs))
|
|
|
|
(define (get-program name)
|
|
(define idx
|
|
(list-index (lambda (n) (string=? n name)) names))
|
|
(unless idx
|
|
(error (string-append "Unknown job name " name "\n\n"
|
|
"Possible job names are: "
|
|
(string-join names " "))))
|
|
(list-ref programs idx))
|
|
|
|
(define (backup args)
|
|
(define name (third args))
|
|
(define program (get-program name))
|
|
(execlp program program))
|
|
|
|
(define (validate-args args)
|
|
(when (not (>= (length args) 3))
|
|
(error (string-append "Usage: " (basename (car args))
|
|
" backup NAME"))))
|
|
|
|
(define (main args)
|
|
(validate-args args)
|
|
(define action (second args))
|
|
(match action
|
|
("backup"
|
|
(backup args))
|
|
(_
|
|
(error (string-append "Unknown action: " action)))))
|
|
|
|
(main (command-line)))))
|
|
|
|
(define (restic-backup-job->mcron-job config)
|
|
(let ((user
|
|
(restic-backup-job-user config))
|
|
(schedule
|
|
(restic-backup-job-schedule config))
|
|
(name
|
|
(restic-backup-job-name config)))
|
|
#~(job #$schedule
|
|
#$(string-append "restic-guix backup " name)
|
|
#:user #$user)))
|
|
|
|
(define (restic-guix-wrapper-package jobs)
|
|
(package
|
|
(name "restic-backup-service-wrapper")
|
|
(version "0.0.0")
|
|
(source (restic-guix jobs))
|
|
(build-system copy-build-system)
|
|
(arguments
|
|
(list #:install-plan #~'(("./" "/bin"))))
|
|
(home-page "https://restic.net")
|
|
(synopsis
|
|
"Easily interact from the CLI with Guix configured backups")
|
|
(description
|
|
"This package provides a simple wrapper around @code{restic}, handled
|
|
by the @code{restic-backup-service-type}. It allows for easily interacting
|
|
with Guix configured backup jobs, for example for manually triggering a backup
|
|
without waiting for the scheduled job to run.")
|
|
(license license:gpl3+)))
|
|
|
|
(define restic-backup-service-profile
|
|
(lambda (config)
|
|
(define jobs (restic-backup-configuration-jobs config))
|
|
(if (> (length jobs) 0)
|
|
(list
|
|
(restic-guix-wrapper-package jobs))
|
|
'())))
|
|
|
|
(define restic-backup-service-type
|
|
(service-type (name 'restic-backup)
|
|
(extensions
|
|
(list
|
|
(service-extension profile-service-type
|
|
restic-backup-service-profile)
|
|
(service-extension mcron-service-type
|
|
(lambda (config)
|
|
(map restic-backup-job->mcron-job
|
|
(restic-backup-configuration-jobs
|
|
config))))))
|
|
(compose concatenate)
|
|
(extend
|
|
(lambda (config jobs)
|
|
(restic-backup-configuration
|
|
(inherit config)
|
|
(jobs (append (restic-backup-configuration-jobs config)
|
|
jobs)))))
|
|
(default-value (restic-backup-configuration))
|
|
(description
|
|
"This service configures @code{mcron} jobs for running backups
|
|
with @code{restic}.")))
|