From ce80e63e1af034f5493d255fb03e2b16eeeb6b91 Mon Sep 17 00:00:00 2001
From: Timo Wilken
Date: Sat, 20 May 2023 15:56:05 +0200
Subject: Clean up phone backups

---
 tw/services/restic.scm | 34 +++++++++++++++++++++++++++-------
 1 file changed, 27 insertions(+), 7 deletions(-)

(limited to 'tw/services/restic.scm')

diff --git a/tw/services/restic.scm b/tw/services/restic.scm
index b3ad79a2..62764750 100644
--- a/tw/services/restic.scm
+++ b/tw/services/restic.scm
@@ -18,8 +18,8 @@
             home-restic-backup-service-type
             restic-backup-repository))
 
-(define-public %restic-user "restic")
-(define-public %restic-group "restic")
+(define %restic-user "restic")
+(define %restic-group "restic")
 
 
 ;; Restic REST server
@@ -104,6 +104,8 @@ private restic repos.")
 
 ;; Restic cleanup cronjobs
 
+(define-maybe list-of-strings)
+
 (define-configuration/no-serialization restic-cleanup-repository
   (schedule gexp "An mcron schedule, specified as a gexp
 (@pxref{G-Expressions}), to use for the cleanup job.  String, list or lambda
@@ -113,6 +115,9 @@ GNU@tie{}mcron}).")
   (password-file string "The file name containing the repository password.
 Must be readable by the @code{%restic-user}.")
   (restic (package restic) "The restic package to use.")
+  (snapshot-paths (maybe-list-of-strings %unset-value) "Only consider
+snapshots which include these paths.")
+  (prune? (boolean #t) "Immediately prune the repo after deleting snapshots.")
   (keep-last (maybe-integer %unset-value) "Keep the last N snapshots.")
   (keep-hourly (maybe-integer %unset-value) "Keep the last N hourly snapshots.")
   (keep-daily (maybe-integer %unset-value) "Keep the last N daily snapshots.")
@@ -126,9 +131,22 @@ given duration relative to the latest snapshot."))
   (define (arg-with-value arg value)
     "Produce a list for the given command-line argument with optional value.
 The result is inteded to be substituted into a `gexp' using `#$@', e.g. into
-an `execl' call.  Values are converted to strings as if by `display'."
-    (if (eq? %unset-value value) '()
-        (list arg (format #f "~a" value))))
+an `execl' call.  Numbers are converted to strings as if by `display'.  Lists
+are turned into multiple arguments.  For booleans, ARG is returned if VALUE is
+true."
+    (define (to-string thing)
+      (format #f "~a" thing))
+    (cond
+     ((eq? %unset-value value)
+      '())
+     ((boolean? value)
+      (if value (list arg) '()))
+     ((list? value)
+      (append-map (lambda (item)
+                    (list arg (to-string item)))
+                  value))
+     (else
+      (list arg (to-string value)))))
 
   (define (cronjob repo)
     #~(job #$(restic-cleanup-repository-schedule repo)
@@ -143,7 +161,9 @@ an `execl' call.  Values are converted to strings as if by `display'."
                   (setenv "RESTIC_REPOSITORY" '#$(restic-cleanup-repository-url repo))
                   (setenv "RESTIC_PASSWORD_FILE" '#$(restic-cleanup-repository-password-file repo))
                   (execl #$(file-append (restic-cleanup-repository-restic repo) "/bin/restic")
-                         "restic" "forget" "--no-cache" "--prune"
+                         "restic" "forget" "--no-cache"
+                         #$@(arg-with-value "--prune" (restic-cleanup-repository-prune? repo))
+                         #$@(arg-with-value "--path" (restic-cleanup-repository-snapshot-paths repo))
                          #$@(arg-with-value "--keep-within" (restic-cleanup-repository-keep-within repo))
                          #$@(arg-with-value "--keep-last" (restic-cleanup-repository-keep-last repo))
                          #$@(arg-with-value "--keep-hourly" (restic-cleanup-repository-keep-hourly repo))
@@ -154,7 +174,7 @@ an `execl' call.  Values are converted to strings as if by `display'."
 
   (map cronjob repositories))
 
-(define-public restic-cleanup-service-type
+(define restic-cleanup-service-type
   (service-type
    (name 'restic-cleanup)
    (extensions
-- 
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