Files | Admin


Release Name: rio-0.4.1

=== Rio - Ruby I/O Facilitator

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.

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

To create the documentation for Rio run the command
  ruby build_doc.rb
from the distribution directory.

Then point your browser at the 'doc/rdoc' directory.

Suggested Reading
* RIO::Rio

== New for version 0.4.1
* Bug fixes to better handle file system paths with URI special
* Other bug fixes.

== New for version 0.4.0
* Alpha. 

== New for version 0.3.9
* Bug fixes, code cleanup. 
* See Rio#split

== New for version 0.3.8
* 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']

* More tests
* Bug fixes

== Version 0.3.7
* Maintenance release

== New for version 0.3.6
* Pipe operator and command pipes

  Pipe multiple commands
   rio('afile') | rio(?-,'acmd') | 'another_cmd' | ?-

  Run the same series of commands, with different input and/or output
   cmdpipe = rio(?-,'acmd') | rio(?-,'another_cmd')
   rio('infile1') | cmdpipe | rio('outfile1')
   rio('infile2') | cmdpipe | rio('outfile2')

   cmdpipe2 = rio(?|,'cmd1','cmd2',rio('outfile'))   # create a cmdpipe Rio
   rio('infile1') | cmdpipe2       # run with input coming from a file
   rio(?-) | cmdpipe2              # same commands with input from stdin

== New for version 0.3.5
* Partial support for MS Windows drive and UNC path specifications
  The separator must be '/'. Back-slashes are not supported.

  Drives and UNC paths may be specified as expected:

  This support has introduced a change in the behaviour
  of Rio#path. Rio#path now returns the path on the 
  file-system for Rios that are on the file-system; returns the path
  portion of the URL for FTP, HTTP and other Rios that
  have a path, and return nil for Rios that have no path
   rio('/a/b/c').path                     #==> "/a/b/c"
   rio('b/c').path                        #==> "b/c"
   rio('C:/b/c').path                     #==> "C:/b/c"
   rio('//ahost/a/b').path                #==> "//ahost/a/b"
   rio('file://ahost/a/b').path           #==> "//ahost/a/b"
   rio('file:///a/b').path                #==> "/a/b"
   rio('file://localhost/a/b').path       #==> "/a/b"
   rio('http://ahost/index.html').path    #==> "/index.html"
   rio('stdin:').path                     #==> nil

== New for version 0.3.4
* New Grande Selection parameter.

  A major weakness of Rio's selection methods (lines, files, etc.)
  has always been that it only implemented a logical OR.

   rio('afile').lines(0..10,/Rio/) {...}
  iterates through lines that are in the range 0..10 OR 
  contain 'Rio'.

   rio('adir').files(:executable?,'*.rb') {...}
  iterates through files that are executable OR match '*.rb'

  Selecting files that matched both required using a proc.
   rio('adir').files(proc{ |f| f.executable? and f.fnmatch?('*.rb')}) {...}

  Rio's grande selection methods will now accept an array of conditions
  which must all be matched, in order to be selected. A logical AND.

   rio('adir').files([:executable?,'*.rb']) {...}
  The array, of course, need not be the only paramter. 

   rio('adir').files('*.exe',[:executable?,'*.rb']) {...}

  selects .exe files and .rb files that are executable.

* Renamed some of grande rejection methods. 
  (based on a suggestion by Gavin Sinclair)
   nolines => skiplines
   nofiles => skipfiles

* New skip() grande method
   rio('afile').skip.lines(/Rio/)       # same as skiplines(/Rio/)
   rio('afile').lines(/Rio/).skip(0..9) # lines with 'Rio', exclude 
                                        # the first ten lines

* Alternative syntaxes for creating Rios that have no path.

   rio(?-)          # create a Rio refering to stdio
   rio(:stdio)      # same thing.
   rio.stdio        # same thing
   RIO.stdio        # ditto
   RIO::Rio.stdio   # once again

* From Pathname added
  * root?
  * mountpoint?
  * realpath
  * cleanpath

* Removed Rio#slurp in favor of Rio#contents.

* Added aliases for the copy operators. (suggested by Dave Burt)
   * copy_to >
   * append_to >>
   * copy_from <
   * append_from <<

* Bug fixes and corrections    

== New for version 0.3.3
* Expanded support and documentation for CSV files
  * Copy, changing the separator to a semicolon
     rio('comma.csv').csv > rio('semicolon.csv').csv(';')
  * Iterate through a file with each line parsed into an array
     rio('afile.csv').csv { |array_of_fields| ...}
  * Create an array of arrays of selected fields
     array_of_arrays = rio('afile.csv').csv.columns(1..3,7).to_a
  * 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('report).csv("\t")


== New for version 0.3.2

* Based on a suggestion by Wybo Decker and code attributed to Nobu Nokada, 
  Rio now supports temporary directories in addition to temporary files.
* Bug fixes
* More tests and documentation.


For the following assume:
 astring = ""
 anarray = []

Copy a file into a string
 rio('afile') > astring 

Copy the chomped lines of a file into an array
 rio('afile').chomp > anarray
Copy a file into another file
 rio('afile') > rio('another_file')

Copy a file into a directory
 rio('afile') > rio('adir')

Copy an entire directory structure into another directory
 rio('adir') > rio('another_directory')

Copy a web page into a file
 rio('') > rio('afile')

Copy a file from a ftp server into a file
 rio('ftp://host/afile.gz') > rio('afile.gz')

Copy a gzipped file un-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')

Copy a plain file, gzipping it
 rio('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| ... }

Create an array of the .rb entries in a directory
 anarray = rio('adir')['*.rb']

Iterate over the .rb files in a directory and its subdirectories
 rio('adir').all.files('*.rb') { |entrio| ... }

Create an array of the .rb entries in a directory and its subdirectories
 anarray = rio('adir').all['*.rb']

Create an array of the .rb files in a directory and its subdirectories
 anarray = rio('adir').all.files['*.rb']

Copy an entire directory structure but only the .rb files from a directory and its subdirectories 
into another directory
 rio('adir').dirs.files('*.rb') > rio('another_directory')

Iterate over the chomped lines of a file
 rio('afile').chomp.lines { |line| ... }

Put the chomped lines of a file into an array
 anarray = rio('afile').chomp.lines[]

Iterate over the first 10 chomped lines of a file
 rio('afile').chomp.lines(0..9) { |line| ... }

Put the first 10 chomped lines of a file into an array
 anarray = rio('afile').chomp.lines[0..9]

Copy the first 10 lines of a file into another file
 rio('afile').lines(0..9) > rio('another_file')

Copy the first 10 lines of a file to stdout
 rio('afile').lines(0..9) > rio(?-)

Copy the first 10 lines of a gzipped file to stdout
 rio('afile.gz').gzip.lines(0..9) > rio(?-)

Copy the first 10 lines of a gzipped file on an ftp server to stdout
 rio('ftp://host/afile.gz').gzip.lines(0..9) > rio(?-)

Put the first 100 chomped lines of a gzipped file into an array
 anarray =  rio('afile.gz').gzip[0...100] 

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 files with the extension '.htm' in a directory and its
subdirectories to have the extension '.html'
 rio('adir').rename.all.files('*.htm') do |htmfile|
   htmfile.extname = '.html'

Create a symbolic link 'asymlink' in 'adir' which refers to 'adir/afile'