Rio - Ruby I/O Facilitator

fa-cil-i-tate: To make easy or easier

Rio is a facade for most of the standard ruby classes that deal with I/O; providing a simple, intuitive, succinct interface to the functionality provided by IO, File, Dir, Pathname, FileUtils, Tempfile, StringIO, OpenURI and others. Rio also provides an application level interface which allows many common I/O idioms to be expressed succinctly.

Examples

Visit http://rio4ruby.com for documentation and more examples.

Iterate over the .rb files in a directory.

rio('adir').files('*.rb') { |entrio| ... }

Return an array of the .rb files in a directory.

rio('adir').files['*.rb']

Copy the .rb files in a directory.to another directory.

rio('adir').files('*.rb') > rio('another_directory')

Iterate over the .rb files in a directory and its subdirectories.

rio('adir').all.files('*.rb') { |entrio| ... }

Return an array of the .rb files in a directory and its subdirectories.

rio('adir').all.files['*.rb']

Copy a file to a directory

rio('adir') << rio('afile')

Copy a directory to another directory

rio('adir') >> rio('another_directory')

Copy a web-page to a file

rio('http://rubydoc.org/') > rio('afile')

Read a web-page into a string

astring = rio('http://rubydoc.org/').read

Ways to get the chomped lines of a file into an array

anarray = rio('afile').chomp[]         # subscript operator
rio('afile').chomp > anarray           # copy-to operator
anarray = rio('afile').chomp.to_a      # to_a
anarray = rio('afile').chomp.readlines # IO#readlines

Iterate over selected lines of a file

 rio('adir').lines(0..3) { |aline| ... }       # a range of lines
 rio('adir').lines(/re/) { |aline| ... }       # by regular expression
 rio('adir').lines(0..3,/re/) { |aline| ... }  # or both

Return selected lines of a file as an array

 rio('adir').lines[0..3]       # a range of lines
 rio('adir').lines[/re/]       # by regular expression
 rio('adir').lines[0..3,/re/]  # or both

Iterate over selected chomped lines of a file

 rio('adir').chomp.lines(0..3) { |aline| ... }       # a range of lines
 rio('adir').chomp.lines(/re/) { |aline| ... }       # by regular expression

Return selected chomped lines of a file as an array

 rio('adir').chomp[0..3]  # a range of lines
 rio('adir').chomp[/re/]  # by regular expression

Copy a gzipped file un-gzipping it

 rio('afile.gz').gzip > rio('afile')

Copy a plain file, gzipping it

 rio('afile.gz').gzip < rio('afile')

Copy a file from a ftp server into a local file un-gzipping it

 rio('ftp://host/afile.gz').gzip > rio('afile')

Return an array of .rb files excluding symlinks to .rb files

 rio('adir').files('*.rb').skip[:symlink?]

Put the first 10 chomped lines of a gzipped file into an array

 anarray =  rio('afile.gz').chomp.gzip[0...10] 

Copy lines 0 and 3 thru 5 of a gzipped file on an ftp server to stdout

 rio('ftp://host/afile.gz').gzip.lines(0,3..5) > ?-

Return an array of files in a directory and its subdirectories, without descending into .svn directories.

 rio('adir').norecurse(/^\.svn$/).files[]

Iterate over the non-empty, non-comment chomped lines of a file

 rio('afile').chomp.skip(:empty?,/^\s*#/) { |line| ... }

Copy the output of th ps command into an array, skipping the header line and the ps command entry

 rio(?-,'ps -a').skiplines(0,/ps$/) > anarray 

Prompt for input and return what was typed

 ans = rio(?-).print("Type Something: ").chomp.gets 

Change the extension of all .htm files in a directory and its subdirectories to .html

 rio('adir').rename.all.files('*.htm') do |htmfile|
   htmfile.extname = '.html'
 end

Installation

Add this line to your application's Gemfile:

gem 'rio'

And then execute:

$ bundle

Or install it yourself as:

$ gem install rio

Usage

Rio is extensively documented at http://rio4ruby.com

• Documentation:: http://rio4ruby.com/
• Project:: https://github.com/rio4ruby/rio4ruby
• Email:: rio4ruby@rio4ruby.com