Find.find, limited recursion

Ruby
1

Hi all,

I’m working on a script that’s currently using Find.find to process a
complete directory tree of files and directories … .however I needed
specific behavior, and I’m still fairly new to this…

Basically it works like this, the user specifies the root directory of a
collection of sub-directories we are interested in … for instance:

User specifies: C:\Root

C:\Root
|
–>\Dir1
|
–>Files_in_dir1
|
–>\Dir2
|
–>Files_in_dir2

But we are only interested in the files in \Dir1 , \Dir2 …and want
to
essentially Prune recursion into C:\Root\Dir1\Subdir_of_Dir1 , and
C:\Root\Dir2\Subdir_of_Dir2 if those exist …

This is what I am currently using, however it will pick up the sub
directories of Dir1 and Dir2 and update the hash… Does anyone see any
way
this could be refactored to not update the “process_list” hash with the
sub
directories of Dir1 and Dir2?

–

@root_dir = “C:\Root”

process_list = Hash.new {|h,k| h[k] = []}

Find.find(@root_dir.to_s) do |f|
f = f.gsub(/\/,’/’)
next if File.stat(f).directory? or f.include?(‘skipped_filename’)
Find.prune if f.include?(“skipped_dirname”)
d, b = File.split(f)
process_list [d] << b
end

Thanks in advance!

Brian

2

Brian W. wrote:

end

Thanks in advance!

Brian

Perhaps you would like file-find better. I think this is what you want:

gem install file-find

rule = File::Find.new(
:path => [‘C:/Root/Dir1’, ‘C:/Root/Dir2’],
:maxdepth => 2,
:directory? => false
)

p rule.find

http://shards.rubyforge.org/wiki/wiki.pl?File-Find

Regards,

Dan

3

2009/9/15 Brian W. [email protected]:

end

Thanks in advance!

require ‘no gems’ # silly joke

Dir[“#{@root_dir}//”].each do |f|
next unless File.file? f
d, b = File.split f
process_list[d] << b
end

Kind regards

robert

4

Thanks Dan,

That would actually work out OK - however since i’m using JRuby I
wouldn’t
be able to use a gem with native C extensions…

Thanks for the suggestion!

Brian

5

Robert,

Hrrm - A simple solution of course … and I’ve spent all this time
trying
to figure it out on my own , without asking for help! :slight_smile:

You’ve helped me in the past with a few other problems, and you were
spot on
each time …

I envy you, and hope that I am able to become even as half as
knowledgeable
as you are…

Best Regards,

Brian

On Wed, Sep 16, 2009 at 2:51 AM, Robert K.

6

Hi,

Am Mittwoch, 16. Sep 2009, 06:01:48 +0900 schrieb Brian W.:

end
Of course I recommend my RbFind tool. It is pure Ruby, no C to
compile.

http://raa.ruby-lang.org/project/rbfind

Do something like (untested):

process_list = Hash.new { |h,k| h[k] = [] }

RbFind.run root do
prune if dir?
next if name =~ /skipped/
process_list[ dirname] << name
end

Bertram

7

On Sep 16, 7:43 am, Brian W. [email protected] wrote:

Thanks Dan,

That would actually work out OK - however since i’m using JRuby I wouldn’t
be able to use a gem with native C extensions…

Thanks for the suggestion!

There’s a JRuby specific gem for file-find. A simple “gem install file-
find” should work, but if it doesn’t try “gem install file-find –
platform=java” and see if that works.

Regards,

Dan

8

On 16.09.2009 15:51, Brian W. wrote:

Hrrm - A simple solution of course … and I’ve spent all this time trying
to figure it out on my own , without asking for help! :slight_smile:

:slight_smile:

You’ve helped me in the past with a few other problems, and you were spot on
each time …

Great to hear that I could provide helpful insights.

I envy you, and hope that I am able to become even as half as knowledgeable
as you are…

You sure will - you practically cannot avoid it: experience takes time -
and it automatically comes with time. :slight_smile:

Btw, it’s the mistakes we learn from.

Kind regards

robert