Magic Encoding is a little tool that allows you to quickly add or modify the magic comments that indicate source file encoding for an entire directory structure, please note that this tool only sets the comments, and does not perform any file encoding conversion whatsoever.
If you are looking for a way to convert files to a specific encoding, check out iconv (GNU)
I originally wrote this to get rid of “invalid multibyte char (US-ASCII)” errors when writing strings containing non ascii characters like éöàüèä in ruby on rails controllers
gem install magic_encoding
you can call the tool from the console with default parameters like so
magic_encoding
this will prepend every “.rb” file in the working directory (recursively) with the following line :
# -*- encoding : utf-8 -*-
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existing magic comments are replaced
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the rest of the file remains unchanged
you can pass options to the tool to specify the desired encoding and the path where you want the tool to run, for example :
--encoding, -e Default: utf-8 --path, -p Default: . (current directory) --files, -f Default: *.rb
Example:
magic_encoding --encoding Shift-JIS --path /path/to/ruby/project --files *.erb
For more information on ruby >= 1.9 encoding features, check out blog.grayproductions.net/articles/ruby_19s_three_default_encodings