borg: add keephourly, keepdaily, keepweekly and keepmonthly variables

examples/example.borg

@@ -130,6 +130,16 @@ exclude = /var/lib/mysql
 ## Default:
 # keep = 30d
 
+## define hourly, daily, weekly and monthly retention for the "borg prune" operation.
+##
+## theses options will be ignored if set to 0
+##
+## Default:
+## keephourly = 0
+## keepdaily = 0
+## keepweekly = 0
+## keepmonthly = 0
+
 ## define extra command-line options for the "borg prune" operation.
 ##
 ## Example:

handlers/borg.in

@@ -41,6 +41,10 @@ getconf exclude
 getconf create_options
 getconf prune yes
 getconf keep 30d
+getconf keephourly 0
+getconf keepdaily 0
+getconf keepweekly 0
+getconf keepmonthly 0
 getconf prune_options
 getconf cache_directory
 getconf filter_warnings yes
@@ -240,6 +244,18 @@ if [ "$prune" == "yes" ]; then
    if [ ! "$keep" == "0" ]; then
       prune_options="${prune_options} --keep-within=${keep}"
    fi
+   if [ ! "$keephourly" == "0" ]; then
+      prune_options="${prune_options} --keep-hourly=${keephourly}"
+   fi
+   if [ ! "$keepdaily" == "0" ]; then
+      prune_options="${prune_options} --keep-daily=${keepdaily}"
+   fi
+   if [ ! "$keepweekly" == "0" ]; then
+      prune_options="${prune_options} --keep-weekly=${keepweekly}"
+   fi
+   if [ ! "$keepmonthly" == "0" ]; then
+      prune_options="${prune_options} --keep-monthly=${keepmonthly}"
+   fi
    prunestr="borg prune $options $prune_options $execstr_repository"
    debug "executing borg prune"
    debug "$prunestr"