New: Create backup files for all important files that are modified.

6 files changed, 71 insertions, 10 deletions

diff --git a/lib/postrunner/ActivitiesDB.rb b/lib/postrunner/ActivitiesDB.rb
index 559a8e5..ecf778d 100644
--- a/lib/postrunner/ActivitiesDB.rb
+++ b/lib/postrunner/ActivitiesDB.rb
@@ -3,7 +3,7 @@
 #
 # = ActivitiesDB.rb -- PostRunner - Manage the data from your Garmin sport devices.
 #
-# Copyright (c) 2014 by Chris Schlaeger <cs@taskjuggler.org>
+# Copyright (c) 2014, 2015 by Chris Schlaeger <cs@taskjuggler.org>
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of version 2 of the GNU General Public License as
@@ -14,6 +14,7 @@ require 'fileutils'
 require 'yaml'
 
 require 'fit4ruby'
+require 'postrunner/BackedUpFile'
 require 'postrunner/Activity'
 require 'postrunner/PersonalRecords'
 require 'postrunner/ActivityListView'
@@ -314,7 +315,9 @@ module PostRunner
 
     def sync
       begin
-        File.open(@archive_file, 'w') { |f| f.write(@activities.to_yaml) }
+        BackedUpFile.open(@archive_file, 'w') do |f|
+          f.write(@activities.to_yaml)
+        end
       rescue StandardError
         Log.fatal "Cannot write archive file '#{@archive_file}': #{$!}"
       end
diff --git a/lib/postrunner/Activity.rb b/lib/postrunner/Activity.rb
index 3e7e51e..ea809f5 100644
--- a/lib/postrunner/Activity.rb
+++ b/lib/postrunner/Activity.rb
@@ -3,7 +3,7 @@
 #
 # = Activity.rb -- PostRunner - Manage the data from your Garmin sport devices.
 #
-# Copyright (c) 2014 by Chris Schlaeger <cs@taskjuggler.org>
+# Copyright (c) 2014, 2015 by Chris Schlaeger <cs@taskjuggler.org>
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of version 2 of the GNU General Public License as
diff --git a/lib/postrunner/BackedUpFile.rb b/lib/postrunner/BackedUpFile.rb
new file mode 100644
index 0000000..6fa820b
--- /dev/null
+++ b/lib/postrunner/BackedUpFile.rb
@@ -0,0 +1,56 @@
+#!/usr/bin/env ruby -w
+# encoding: UTF-8
+#
+# = ActivitiesDB.rb -- PostRunner - Manage the data from your Garmin sport devices.
+#
+# Copyright (c) 2015 by Chris Schlaeger <cs@taskjuggler.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of version 2 of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+
+module PostRunner
+
+  # BackUpFile is a specialized version of File that creates a copy on
+  class BackedUpFile < File
+
+     def BackedUpFile.open(filename, mode = 'r', *opt, &block)
+       # If the file is opened for writing we create a backup file.
+       create_backup_file(filename) if mode.include?('w') || mode.include?('a')
+       super
+     end
+
+     def BackedUpFile.write(filename, string)
+       create_backup_file(filename)
+       super
+     end
+
+     private
+
+     def BackedUpFile.create_backup_file(filename)
+       bak_file = filename + '.bak'
+
+       # Delete the backup file if it exists.
+       if File.exists?(bak_file)
+         begin
+           File.delete(bak_file)
+         rescue SystemCallError
+           Log.fatal "Cannote remove backup file '#{bak_file}': #{$!}"
+         end
+       end
+
+       # Rename the old file to <filename>.bak
+       if File.exists?(filename)
+         begin
+           File.rename(filename, bak_file)
+         rescue SystemCallError
+           Log.fatal "Cannot rename file '#{filename}' to '#{bak_file}': #{$!}"
+         end
+       end
+     end
+
+  end
+
+end
+
diff --git a/lib/postrunner/Main.rb b/lib/postrunner/Main.rb
index 57ca0e3..884608b 100644
--- a/lib/postrunner/Main.rb
+++ b/lib/postrunner/Main.rb
@@ -3,7 +3,7 @@
 #
 # = Main.rb -- PostRunner - Manage the data from your Garmin sport devices.
 #
-# Copyright (c) 2014 by Chris Schlaeger <cs@taskjuggler.org>
+# Copyright (c) 2014, 2015 by Chris Schlaeger <cs@taskjuggler.org>
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of version 2 of the GNU General Public License as
@@ -51,7 +51,7 @@ module PostRunner
 
         opts.separator <<"EOT"
 
-Copyright (c) 2014 by Chris Schlaeger
+Copyright (c) 2014, 2015 by Chris Schlaeger
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of version 2 of the GNU General Public License as published by the
diff --git a/lib/postrunner/PersonalRecords.rb b/lib/postrunner/PersonalRecords.rb
index 842625a..fc8c2cd 100644
--- a/lib/postrunner/PersonalRecords.rb
+++ b/lib/postrunner/PersonalRecords.rb
@@ -3,7 +3,7 @@
 #
 # = PersonalRecords.rb -- PostRunner - Manage the data from your Garmin sport devices.
 #
-# Copyright (c) 2014 by Chris Schlaeger <cs@taskjuggler.org>
+# Copyright (c) 2014, 2015 by Chris Schlaeger <cs@taskjuggler.org>
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of version 2 of the GNU General Public License as
@@ -14,6 +14,7 @@ require 'fileutils'
 require 'yaml'
 
 require 'fit4ruby'
+require 'postrunner/BackedUpFile'
 
 module PostRunner
 
@@ -109,7 +110,7 @@ module PostRunner
         { :halign => :right },
         { :halign => :right },
         { :halign => :right },
-        { :halign => :right },
+        { :halign => :left },
         { :halign => :left }
       ])
       t.body
@@ -145,7 +146,7 @@ module PostRunner
 
     def save_records
       begin
-        File.open(@records_file, 'w') { |f| f.write(@records.to_yaml) }
+        BackedUpFile.open(@records_file, 'w') { |f| f.write(@records.to_yaml) }
       rescue StandardError
         Log.fatal "Cannot write records file '#{@records_file}': #{$!}"
       end
diff --git a/lib/postrunner/RuntimeConfig.rb b/lib/postrunner/RuntimeConfig.rb
index 5b424df..cd297e0 100644
--- a/lib/postrunner/RuntimeConfig.rb
+++ b/lib/postrunner/RuntimeConfig.rb
@@ -3,7 +3,7 @@
 #
 # = ActivitiesDB.rb -- PostRunner - Manage the data from your Garmin sport devices.
 #
-# Copyright (c) 2014 by Chris Schlaeger <cs@taskjuggler.org>
+# Copyright (c) 2014, 2015 by Chris Schlaeger <cs@taskjuggler.org>
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of version 2 of the GNU General Public License as
@@ -12,6 +12,7 @@
 
 require 'yaml'
 require 'fit4ruby'
+require 'postrunner/BackedUpFile'
 
 module PostRunner
 
@@ -69,7 +70,7 @@ module PostRunner
 
     def save_options
       begin
-        File.write(@config_file, @options.to_yaml)
+        BackedUpFile.write(@config_file, @options.to_yaml)
         Log.info "Runtime config file '#{@config_file}' written"
       rescue
         Log.error "Cannot write config file '#{@config_file}': #{$!}"