persist.rb in rbbt-util-4.0.1

- old
+ new

@@ -2,10 +2,11 @@
 
 require 'rbbt/util/misc'
 require 'rbbt/util/open'
 
 require 'rbbt/persist/tsv'
+require 'set'
 
 module Persist
   CACHEDIR="/tmp/tsv_persistent_cache"
   FileUtils.mkdir CACHEDIR unless File.exist? CACHEDIR
 
@@ -65,14 +66,17 @@
     filename  << ":" << options_md5 unless options_md5.empty?
 
     File.join(persistence_dir, filename)
   end
 
+  TRUE_STRINGS = Set.new ["true", "True", "TRUE", "t", "T", "1", "yes", "Yes", "YES", "y", "Y", "ON", "on"]
   def self.load_file(path, type)
     case (type || "nil").to_sym
     when :nil
       nil
+    when :boolean
+      TRUE_STRINGS.include? Open.read(path).chomp.strip
     when :tsv
       TSV.open(path)
     when :marshal_tsv
       TSV.setup(Marshal.load(Open.open(path)))
     when :fwt
@@ -103,18 +107,20 @@
     return if (content.nil? and File.exists? path)
     
     case (type || "nil").to_sym
     when :nil
       nil
+    when :boolean
+      Open.write(path, content ? "true" : "false")
     when :fwt
       content.file.seek 0
       Open.write(path, content.file.read)
     when :tsv
       Open.write(path, content.to_s)
     when :string, :text
       Open.write(path, content)
     when :array
-      Open.write(path, content * "\n" + "\n")
+      Open.write(path, content * "\n")
     when :marshal_tsv
       Open.write(path, Marshal.dump(content.dup))
     when :marshal
       Open.write(path, Marshal.dump(content))
     when :yaml