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Re: Ruby and ClearCase...

Cameron, Gemma (UK)

8/23/2006 10:07:00 AM

OK so no one has used ruby to drive clearcase... might have to be a pet project to create a gem for this; gem's gem. heh

Now my problem is a very simple one and I don't seem to be typing the right things into google or looking up the right things in anvil to find it so I thought I could ask you guys for some ideas...

Problem:
I want to parse the STDIN generated when I do a clearcase update and for every line that contains:
Loading "path_to_a_file.txt" (0 bytes)
What I want to get from this line is the filename (stuff in the quotes) so I can send it to a method to be zipped. Initially before I try to zip the file it would be nice to do some debugging by printing the filenames into a text file. This is what I have so far:

def updateView
Dir.chdir("f:")
Dir.chdir(getPathToView)
system("cleartool update -rename #{getPathToView}") if viewCreated?
parseOutput
print "\nUpdated #{getPathToView}\n"
end

def parseOutput
$stdin.each { |line|
if line =~ [^Loading]
file = line.match(/".*"/)
zipUp(file)
puts "matched!"
end
}
end

def zipUp(file)
Zip::ZipFile::open("updated.zip", true) { |zf|
zf.add(file, file)
}
end




Ta in anticipation of the flood of help/abuse to ensue, ( ;

Gem

Regards

Gemma Cameron


-----Original Message-----
From: Cameron, Gemma (UK)
Sent: 22 August 2006 10:09
To: ruby-talk ML
Subject: Ruby and ClearCase...


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Hi Guys,

Has anyone used Ruby (or Rake) to interface with cleartool or Rational ClearCase? I googled the problem and found the following project at rubyforge which looks promising... or at least would be if there were any released files (or am I missing reference to a gem somewhere?)

http://rubyforge.org/projects/b...

What I'm wanting to do is to parse the output from cleartool after I've updated a snapshot in order to zip up the new files it's loaded (seeing as ClearCase insists on retaining the entire directory structure when you load folders - I'm used to svn...).

If not are there any suggestions as to how I could go about this or should I just use ruby as a means to sending commands to the shell (system "cleartool -mkview...") followed by somesort of STDIN/OUT? I'm on Windows NT4 and ClearCase 3.2 by the way...

Thanks in advance!


Gem

Regards

Gemma Cameron

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1 Answer

Austin Ziegler

8/23/2006 12:30:00 PM

0

On 8/23/06, Cameron, Gemma (UK) <Gemma.Cameron@baesystems.com> wrote:
> OK so no one has used ruby to drive clearcase... might have to be a
> pet project to create a gem for this; gem's gem. heh

This isn't all that surprising -- ClearCase is hella expensive and the
last time that I dealt with it was eight years ago. No other company
I've worked for uses it.

> Now my problem is a very simple one and I don't seem to be typing the
> right things into google or looking up the right things in anvil to
> find it so I thought I could ask you guys for some ideas...

> Problem:
> I want to parse the STDIN generated when I do a clearcase update and
> for every line that contains:
> Loading "path_to_a_file.txt" (0 bytes)
> What I want to get from this line is the filename (stuff in the
> quotes) so I can send it to a method to be zipped. Initially before
> I try to zip the file it would be nice to do some debugging by
> printing the filenames into a text file. This is what I have so far:
>
> def updateView
> Dir.chdir("f:")
> Dir.chdir(getPathToView)
> system("cleartool update -rename #{getPathToView}") if viewCreated?
> parseOutput
> print "\nUpdated #{getPathToView}\n"
> end
>
> def parseOutput
> $stdin.each { |line|
> if line =~ [^Loading]
> file = line.match(/".*"/)
> zipUp(file)
> puts "matched!"
> end
> }
> end
>
> def zipUp(file)
> Zip::ZipFile::open("updated.zip", true) { |zf|
> zf.add(file, file)
> }
> end

A couple of things. It is common Ruby parlance to use underscores in
method names instead of interCaps. So updateView would become
update_view. Second, in your updateView, where are you getting the
"getPathToView" value? Is it another method (like #viewCreated?)? Also,
you probably want to use a pipe -- I haven't done this on Windows -- so
look at popen if it'll work on Windows. Otherwise, do:

def update_view(path_to_view, drive = nil)
Dir.chdir("#{drive}#{path_to_view}") do |dir|
if view_created?(path_to_view)
output = `cleartool update -rename #{path_to_view}`
parse_output output
puts "\nUpdated #{path_to_view}"
end
end
end

def parse_output(input)
input.split($/).each do |line|
if line =~ %r{^Loading} # or /^Loading/
file = line.split(//)[1]
zip_up(file)
puts "Matched #{file}"
end
end
end

def zip_up(file)
Zip::ZipFile::open("updated.zip", true) { |zf|
zf.add(file, file)
}
end

Not tested, obviously, since I don't have CC.

-austin
--
Austin Ziegler * halostatue@gmail.com * http://www.halo...
* austin@halostatue.ca * http://www.halo...feed/
* austin@zieglers.ca