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Re: documentation for Open3, Ping: msg#00021

Subject: Re: documentation for Open3, Ping
On 10/15/06, Eric Hodel <drbrain@xxxxxxxxxxxx> wrote:
On Oct 7, 2006, at 4:08 PM, Konrad Meyer wrote:
> If the formatting and whatnot of ParseDate is ok, I have patches for
> Open3 and Ping (yes, I know they're simple) ready. See attached.

Index: open3.rb
===================================================================
RCS file: /src/ruby/lib/open3.rb,v
retrieving revision 1.13
diff -p -u -1 -r1.13 open3.rb
--- open3.rb    4 Aug 2006 18:05:40 -0000       1.13
+++ open3.rb    7 Oct 2006 23:05:03 -0000
@@ -1,13 +1,16 @@
-# open3.rb: Spawn a program like popen, but with stderr, too. You
might also
-# want to use this if you want to bypass the shell. (By passing
multiple args,
-# which IO#popen does not allow)

The "You might also..." sentence should remain.  (I think IO#popen
should reference #popen3 as well.)

OK.

#
-# Usage:
+# = open3.rb: Popen, but with stderr, too
#
-#   require "open3"
-#
-#   stdin, stdout, stderr = Open3.popen3('nroff -man')
+# Author:: Yukihiro Matsumoto
+# Documentation:: Konrad Meyer
+#
+# Open3 gives you access to stdin, stdout, and stderr when running
other
+# programs.
+#
+
#
-# or:
+# Open3 grants you access to stdin, stdout, and stderr when running
another
+# program. Example:

I like "gives you".

Agreed.


+#   require "open3"
#   include Open3
@@ -16,12 +19,28 @@
#
-# popen3 can also take a block which will receive stdin, stdout and
stderr as
-# parameters.  This ensures stdin, stdout and stderr are closed once
the block
-# exits.
+# Open3.popen3 can also take a block which will receive stdin,
stdout and
+# stderr as parameters.  This ensures stdin, stdout and stderr are
closed
+# once the block exits. Example:
#
-# Such as:
+#   require "open3"
#
#   Open3.popen3('nroff -man') { |stdin, stdout, stderr| ... }
+#

I think this should be moved to the #popen3 method.  I like class/
module level being overview and general usage and method being
specific usage.  This way you don't have to go back and forth so much
to figure out how a something is supposed to be used or work.


Alright, makes enough sense to me.

module Open3
-  #[stdin, stdout, stderr] = popen3(command);
+  #
+  # Open stdin, stdout, and stderr streams and start external
executable.
+  # Non-block form:
+  #
+  #   require 'open3'
+  #
+  #   [stdin, stdout, stderr] = Open3.popen3(cmd)
+  #
+  # Block form:
+  #
+  #   require 'open3'
+  #
+  #   Open3.popen3(cmd) { |stdin, stdout, stderr| ... }
+  #
+  # The parameter +cmd+ is passed directly to Kernel#exec.
+  #
    def popen3(*cmd)
Index: ping.rb

New open3.rb.patch.

--
Konrad Meyer

Attachment: open3.rb.patch
Description: Text Data

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