diff options
Diffstat (limited to 'byteback-prune')
| -rwxr-xr-x | byteback-prune | 116 |
1 files changed, 57 insertions, 59 deletions
diff --git a/byteback-prune b/byteback-prune index 28ef2bf..d005289 100755 --- a/byteback-prune +++ b/byteback-prune @@ -4,7 +4,7 @@ # backups (whether by age, or importance). # -$LOAD_PATH.unshift("/usr/lib/byteback") +$LOAD_PATH.unshift('/usr/lib/byteback') require 'trollop' require 'byteback' @@ -13,30 +13,28 @@ include Byteback include Byteback::Log include Byteback::Util -opts = Trollop::options do +opts = Trollop.options do + banner "Prune old backup directories to ensure there's enough space" - banner "Prune old backup directories to ensure there's enough space" + opt :minpercent, 'Start prune when disk has less than this %age free', + type: :integer, + default: 5 - opt :minpercent, "Start prune when disk has less than this %age free", - :type => :integer, - :default => 5 + opt :maxpercent, 'Stop prune when disk has more than this %age free', + type: :integer, + default: 10 - opt :maxpercent, "Stop prune when disk has more than this %age free", - :type => :integer, - :default => 10 + opt :list, 'List backups in pruning order, no other action' - opt :list, "List backups in pruning order, no other action" + opt :prune, 'Prune the next backup if necessary' - opt :prune, "Prune the next backup if necessary" + opt :prune_force, 'Prune the next backup regardless' - opt :prune_force, "Prune the next backup regardless" - - opt :order, "Order backups by 'age' or 'importance'", - :type => :string, - :default => "importance" - - opt :verbose, "Show debugging messages" + opt :order, "Order backups by 'age' or 'importance'", + type: :string, + default: 'importance' + opt :verbose, 'Show debugging messages' end @order = opts[:order] @@ -49,7 +47,7 @@ end @do_prune = true if @do_prune_force -fatal("Must specify one of --prune or --list") unless +fatal('Must specify one of --prune or --list') unless (@do_prune || @do_list) && !(@do_prune && @do_list) @@ -57,24 +55,24 @@ fatal("Must specify --order as 'age' or 'importance'") unless @order == 'age' || @order == 'importance' if BackupDirectory.all.empty? - fatal("No backup directories found, need to run byteback-snapshot") + fatal('No backup directories found, need to run byteback-snapshot') end -lock_out_other_processes("byteback-prune") +lock_out_other_processes('byteback-prune') @df_history = DiskFreeHistory.new(ENV['HOME']) begin - @df_history.new_reading! + @df_history.new_reading! rescue Errno::ENOSPC - if @do_list - warn("Couldn't write disk history file due to lack of space, ignoring") - else - warn("Couldn't write disk history file due to lack of space, going to --prune-force") - @do_prune = @do_prune_force = true - end + if @do_list + warn("Couldn't write disk history file due to lack of space, ignoring") + else + warn("Couldn't write disk history file due to lack of space, going to --prune-force") + @do_prune = @do_prune_force = true + end rescue => anything_else - error("Couldn't record disk history of #{@df_history.mountpoint} in #{@df_history.history_file}, installation problem?") - raise + error("Couldn't record disk history of #{@df_history.mountpoint} in #{@df_history.history_file}, installation problem?") + raise end gradient_30m = @df_history.gradient(1800) @@ -85,57 +83,57 @@ gradient_30m = @df_history.gradient(1800) PRUNING_FLAG = "#{ENV['HOME']}/.byteback.pruning" if @do_prune_force - info("Forcing prune") -elsif @free <= @minpercent && !File.exists?(PRUNING_FLAG) - info("Starting prune #{@free}% -> #{@maxpercent} free") - File.write(PRUNING_FLAG,"") -elsif @free >= @maxpercent && File.exists?(PRUNING_FLAG) - info("Stopping prune, reached #{@free}% free") - File.unlink(PRUNING_FLAG) -elsif File.exists?(PRUNING_FLAG) - info("Continuing prune #{@free}% -> #{@maxpercent}, gradient = #{gradient_30m}") + info('Forcing prune') +elsif @free <= @minpercent && !File.exist?(PRUNING_FLAG) + info("Starting prune #{@free}% -> #{@maxpercent} free") + File.write(PRUNING_FLAG, '') +elsif @free >= @maxpercent && File.exist?(PRUNING_FLAG) + info("Stopping prune, reached #{@free}% free") + File.unlink(PRUNING_FLAG) +elsif File.exist?(PRUNING_FLAG) + info("Continuing prune #{@free}% -> #{@maxpercent}, gradient = #{gradient_30m}") end debug("Disc free #{@free}%, 30m gradient = #{gradient_30m}") def snapshots_in_order - list = BackupDirectory.all_snapshots - if @order == 'importance' - Snapshot.sort_by_importance(list) - elsif @order == 'age' - list.sort.reverse - else - raise ArgumentError.new("Unknown snapshot sort method #{method}") - end + list = BackupDirectory.all_snapshots + if @order == 'importance' + Snapshot.sort_by_importance(list) + elsif @order == 'age' + list.sort.reverse + else + fail ArgumentError.new("Unknown snapshot sort method #{method}") + end end snapshots = snapshots_in_order if @do_list - print "Backups by #{@order}:\n" - snapshots.each_with_index do |snapshot, index| - print "#{sprintf('% 3d',index)}: #{snapshot.path}\n" - end + print "Backups by #{@order}:\n" + snapshots.each_with_index do |snapshot, index| + print "#{sprintf('% 3d', index)}: #{snapshot.path}\n" + end end # Don't do anything if we've not got two hours of readings # -if !@do_prune_force - if @df_history.list.last.time - @df_history.list.first.time < 1800 - warn("Not enough disc space history to make a decision") - exit 0 - end +unless @do_prune_force + if @df_history.list.last.time - @df_history.list.first.time < 1800 + warn('Not enough disc space history to make a decision') + exit 0 + end end exit 0 unless - (@do_prune && File.exists?(PRUNING_FLAG)) || + (@do_prune && File.exist?(PRUNING_FLAG)) || @do_prune_force exit 0 unless @do_prune_force || gradient_30m == 0 if snapshots.empty? - error("No snapshots to delete, is there enough disc space?") - exit 1 + error('No snapshots to delete, is there enough disc space?') + exit 1 end info("Deleting #{snapshots.last.path}") |