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[ANN] Rio 0.3.8
rio4ruby
5/5/2006 6:40:00 PM
Rio 0.3.8
== Overview
Rio is a Ruby I/O convenience class wrapping much of the functionality
of IO, File and Dir. Rio also uses FileUtils, Tempfile, StringIO,
OpenURI, Net::FTP, Zlib, and CSV to provide similar functionality
using a simple consistent interface. In addition to forwarding the
interfaces provided by IO, File, and Dir to an appropriate object, Rio
provides a "grande" interface that allows many common application
level I/O and file-system tasks to be expressed succinctly.
== New
Enhanced support for FTP file-systems. All of Rio's most powerful
idioms are now supported seamlessly on FTP servers.
# copy a file from or to an FTP server
rio('ftp://ahost/adir/afile') > rio('localfile') # server -> local
file
rio('ftp://ahost/adir/afile') < rio('localfile') # local file ->
server
# copy an entire directory structure from or to an FTP server
rio('ftp://ahost/adir') > rio('localdir') # server -> local directory
rio('ftp://ahost/adir') < rio('localdir') # local directory -> server
All of Rio's grande selection and filtering options are available for
files and directories on FTP servers.
# create a gzipped copy of a web page on an ftp server
rio('ftp://ftphost/f.html.gz').gzip < rio('http://httphost/f.html')
# dump the first 10 lines of a gzipped log file on an FTP server to
stdout
rio('ftp://ftphost/logfile.txt').lines(0...10) > ?-
# iterate through the entries of a directory on an FTP server
rio('ftp://ftphost/adir').entries { |entrio| ... }
# get an array of all .rb files on an ftp server
rb_files = rio('ftp://ftphost/').all.files['*.rb']
== SYNOPSIS
For the following assume:
astring = ""
anarray = []
Copy or append a file to a string
rio('afile') > astring # copy
rio('afile') >> astring # append
Copy or append a string to a file
rio('afile') < astring # copy
rio('afile') << astring # append
Copy or append the lines of a file to an array
rio('afile') > anarray
rio('afile') >> anarray
Copy or append a file to another file
rio('afile') > rio('another_file')
rio('afile') >> rio('another_file')
Copy a file to a directory
rio('adir') << rio('afile')
Copy a directory structure to another directory
rio('adir') >> rio('another_directory')
Copy a web-page to a file
rio('
http://rubydoc...
) > rio('afile')
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
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')
Iterate over the entries in a directory
rio('adir').entries { |entrio| ... }
Iterate over only the files in a directory
rio('adir').files { |entrio| ... }
Iterate over only the .rb files in a directory
rio('adir').files('*.rb') { |entrio| ... }
Iterate over .rb files but not symlinks to .rb files
rio('adir').files('*.rb').skip(:symlink?) { |entrio| ... }
Iterate over only the _dot_ files in a directory
rio('adir').files(/^\./) { |entrio| ... }
Iterate over the files in a directory and its subdirectories, skipping
'.svn' and 'CVS' directories
rio('adir').norecurse(/^\.svn$/,'CVS').files { |entrio| ... }
Create an array of the .rb entries in a directory
anarray = rio('adir')['*.rb']
Create an array of the .rb entries in a directory and its
subdirectories.
anarray = rio('adir').all['*.rb']
Iterate over the .rb files in a directory and its subdirectories
rio('adir').all.files('*.rb') { |entrio| ... }
Iterate over the non-empty, non-comment chomped lines of a file
rio('afile').chomp.skip.lines(:empty?,/^\s*#/) { |line| ... }
Copy the output of th ps command into an array, skipping the header
line and the ps command entry
rio(?-,'ps -a').skip.lines(0,/ps$/) > 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
Create a symbolic link 'asymlink' in 'adir' which refers to
'adir/afile'
rio('adir/afile').symlink('adir/asymlink')
Copy a CSV file, changing the separator to a semicolon
rio('comma.csv').csv > rio('semicolon.csv').csv(';')
Iterate through a CSVfile with each line parsed into an array
rio('afile.csv').csv { |array_of_fields| ...}
Create a tab separated file of accounts in a UNIX passwd file,
listing only the username, uid, and realname fields
rio('/etc/passwd').csv(':').columns(0,2,4) > rio('rpt').csv("\t")
Pipe multiple commands
rio('afile') | rio(?-,'acmd') | 'another_cmd' | ?-
== Contact
Project::
http://rubyforge.org/pro...
Documentation::
http://rio.ruby...
Bugs::
http://rubyforge.org/tracker/?gr...
Email:: rio4ruby@rubyforge.org
== Copyright
Copyright (c) 2005, 2006 Christopher Kleckner. All rights reserved
== License
Rio is released under the GNU General Public License
(
http://www.gnu.org/license...
)
-Christopher Kleckner
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