Initial commit

rakelib/rename_by_csv.rake

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+###############################################################################
+# TASK: rename_by_csv
+#
+# read csv, rename files
+###############################################################################
+
+desc "rename objects using csv"
+task :rename_by_csv, [:csv_file,:filename_current,:filename_new,:input_dir,:output_dir] do |_t, args|
+  # set default arguments
+  args.with_defaults(
+    csv_file: 'rename.csv',
+    filename_current: 'filename_old',
+    filename_new: 'filename_new',
+    input_dir: 'objects/',
+    output_dir: 'renamed/'
+  )
+
+  # check for csv file
+  if !File.exist?(args.csv_file)
+    puts "CSV file does not exist! No files renamed and exiting."
+  else
+    # read csv file
+    csv_text = File.read(args.csv_file, :encoding => 'utf-8')
+    csv_contents = CSV.parse(csv_text, headers: true)
+
+    # Ensure that the output directory exists.
+    FileUtils.mkdir_p(args.output_dir) unless Dir.exist?(args.output_dir)
+
+    # iterate on csv rows
+    csv_contents.each do |item|
+      # check csv for old and new filenames
+      if item[args.filename_current]
+        name_old = File.join(args.input_dir, item[args.filename_current])
+      else
+        puts "no current filename given, skipping!"
+        next
+      end
+      if item[args.filename_new]
+        name_new = File.join(args.output_dir, item[args.filename_new])
+      else
+        puts "no new filename given, skipping!"
+        next
+      end
+      # check if old and new file exist
+      if !File.exist?(name_old)
+        puts "old file '#{name_old}' does not exist, skipping!"
+        next
+      end
+      if File.exist?(name_new)
+        puts "new filename '#{name_new}' already exists, skipping!"
+        next
+      end
+      puts "copying: '#{name_old}' to '#{name_new}'"
+      system('cp', name_old, name_new)
+    end
+    
+    puts "done renaming."
+
+  end
+
+end