Dir.glob finding folders

ruby-talk
#1

Hey,

I've been messing with this for hours now and I really thought this
would work! I want to prompt to get the letter of the drive to search,
then if the directory has the text "CFI-" in it, add that full path as
a line to a text file.

file = File.open("projects.txt", "w")
print "Enter Drive Letter: "
drive_letter = gets.chomp
Dir.glob("#{drive_letter}:\\**\\{CFI-}*") do |f|
  file << "#{f} \n"
end

Why is this not working?

Thanks!

Geoff

#2

Shouldn't it be

      Dir.glob("#{drive_letter}:\\**\\CFI-*")

?? I mean, CFI- isn't a variable.

Regards, Morton

···

On Aug 3, 2006, at 6:20 PM, Geoff wrote:

Hey,

I've been messing with this for hours now and I really thought this
would work! I want to prompt to get the letter of the drive to search,
then if the directory has the text "CFI-" in it, add that full path as
a line to a text file.

file = File.open("projects.txt", "w")
print "Enter Drive Letter: "
drive_letter = gets.chomp
Dir.glob("#{drive_letter}:\\**\\{CFI-}*") do |f|
  file << "#{f} \n"
end

Why is this not working?

#3

Geoff wrote:

I want to prompt to get the letter of the drive to search,
then if the directory has the text "CFI-" in it, add that full path as
a line to a text file.

$ ri Find
- ------------------------------------------------------------
Class: Find
     The Find module supports the top-down traversal of a set of file
     paths.

     For example, to total the size of all files under your home
     directory, ignoring anything in a "dot" directory (e.g.
     $HOME/.ssh):

       require 'find'

       total_size = 0

       Find.find(ENV["HOME"]) do |path|
         if FileTest.directory?(path)
           if File.basename(path)[0] == ?.
             Find.prune # Don't look any further into this
directory.
           else
             next
           end
         else
           total_size += FileTest.size(path)
         end
       end

···

-
------------------------------------------------------------------------

Instance methods:
     find, prune

#4

Geoff wrote:

...
Dir.glob("#{drive_letter}:\\**\\{CFI-}*") do |f|
...

You have to use slashes instead of backslashes, even on windows.
See this irb session:

irb(main):001:0> Dir.glob("c:\\**\\*.bak").length
=> 0
irb(main):002:0> Dir.glob("c:/**/*.bak").length
=> 17

Regards
Holger

#5

Retract. I didn't read this carefully enough. {CFI-} has no # in front of it.

Regards, Morton

···

On Aug 3, 2006, at 7:00 PM, Morton Goldberg wrote:

Shouldn't it be

     Dir.glob("#{drive_letter}:\\**\\CFI-*")

?? I mean, CFI- isn't a variable.

Regards, Morton

On Aug 3, 2006, at 6:20 PM, Geoff wrote:

Hey,

I've been messing with this for hours now and I really thought this
would work! I want to prompt to get the letter of the drive to search,
then if the directory has the text "CFI-" in it, add that full path as
a line to a text file.

file = File.open("projects.txt", "w")
print "Enter Drive Letter: "
drive_letter = gets.chomp
Dir.glob("#{drive_letter}:\\**\\{CFI-}*") do |f|
  file << "#{f} \n"
end

Why is this not working?

#6

Yep, your right. However I changed that and ran it, but it still comes
up with an empty text file (even though there are quite a few
directories that contain "CFI-").

Morton Goldberg wrote:

···

Shouldn't it be

      Dir.glob("#{drive_letter}:\\**\\CFI-*")

?? I mean, CFI- isn't a variable.

Regards, Morton

On Aug 3, 2006, at 6:20 PM, Geoff wrote:

> Hey,
>
> I've been messing with this for hours now and I really thought this
> would work! I want to prompt to get the letter of the drive to search,
> then if the directory has the text "CFI-" in it, add that full path as
> a line to a text file.
>
> file = File.open("projects.txt", "w")
> print "Enter Drive Letter: "
> drive_letter = gets.chomp
> Dir.glob("#{drive_letter}:\\**\\{CFI-}*") do |f|
> file << "#{f} \n"
> end
>
> Why is this not working?

#7

Just to follow up, I did try this and it worked. I also want to add
that the reason I was trying to use Dir is because in searching for
solutions to this I found reference to it being faster. I would still
love to hear any feedback on how to optimize this or change the
solution so that it would speed things up. Searching a 60gb hard drive
this way takes a while. :slight_smile:

Anyway, my solution that eventually worked:

require 'find'

file = File.open("projects.txt", "w")
print "Enter Drive Letter: "
drive_letter = gets.chomp
Find.find("#{drive_letter}:/") do |path|
  if FileTest.directory?(path)
    if path =~ /CFI-/
      file << "#{path} \n"
    end
  end
end

Thanks!

Geoff

Suraj N. Kurapati wrote:

···

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Geoff wrote:
> I want to prompt to get the letter of the drive to search,
> then if the directory has the text "CFI-" in it, add that full path as
> a line to a text file.

$ ri Find
- ------------------------------------------------------------
Class: Find
     The Find module supports the top-down traversal of a set of file
     paths.

     For example, to total the size of all files under your home
     directory, ignoring anything in a "dot" directory (e.g.
     $HOME/.ssh):

       require 'find'

       total_size = 0

       Find.find(ENV["HOME"]) do |path|
         if FileTest.directory?(path)
           if File.basename(path)[0] == ?.
             Find.prune # Don't look any further into this
directory.
           else
             next
           end
         else
           total_size += FileTest.size(path)
         end
       end

-
------------------------------------------------------------------------

Instance methods:
     find, prune

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2.2 (GNU/Linux)

iD8DBQFE0u7ZmV9O7RYnKMcRAjIBAJ9+q41R2tvLhDGfjFNhHgNBVUGmqgCePUpM
UwoV4jQdlEZSTk+A6UZO/HE=
=hWcm
-----END PGP SIGNATURE-----

#8

I'm not sure actually. I was reading code to figure this out and found
that use of the braces. Tried it out...

Morton Goldberg wrote:

···

Retract. I didn't read this carefully enough. {CFI-} has no # in
front of it.

Regards, Morton

On Aug 3, 2006, at 7:00 PM, Morton Goldberg wrote:

> Shouldn't it be
>
> Dir.glob("#{drive_letter}:\\**\\CFI-*")
>
> ?? I mean, CFI- isn't a variable.
>
> Regards, Morton
>
> On Aug 3, 2006, at 6:20 PM, Geoff wrote:
>
>> Hey,
>>
>> I've been messing with this for hours now and I really thought this
>> would work! I want to prompt to get the letter of the drive to
>> search,
>> then if the directory has the text "CFI-" in it, add that full
>> path as
>> a line to a text file.
>>
>> file = File.open("projects.txt", "w")
>> print "Enter Drive Letter: "
>> drive_letter = gets.chomp
>> Dir.glob("#{drive_letter}:\\**\\{CFI-}*") do |f|
>> file << "#{f} \n"
>> end
>>
>> Why is this not working?
>
>

#9

I'm on an Mac OS X box, and you appear to be on Windows box, so file system differ (I don't have drive letters to contend with), but have tried

      Dir.glob("#{drive_letter}:*\\**\\CFI-*")

or

      Dir.glob("#{drive_letter}:*/**/CFI-*")

Regards, Morton

···

On Aug 3, 2006, at 7:10 PM, Geoff wrote:

Yep, your right. However I changed that and ran it, but it still comes
up with an empty text file (even though there are quite a few
directories that contain "CFI-").

Morton Goldberg wrote:

Shouldn't it be

      Dir.glob("#{drive_letter}:\\**\\CFI-*")

?? I mean, CFI- isn't a variable.

Regards, Morton

On Aug 3, 2006, at 6:20 PM, Geoff wrote:

Hey,

I've been messing with this for hours now and I really thought this
would work! I want to prompt to get the letter of the drive to search,
then if the directory has the text "CFI-" in it, add that full path as
a line to a text file.

file = File.open("projects.txt", "w")
print "Enter Drive Letter: "
drive_letter = gets.chomp
Dir.glob("#{drive_letter}:\\**\\{CFI-}*") do |f|
  file << "#{f} \n"
end

Why is this not working?

#10

Geoff wrote:

Yep, your right. However I changed that and ran it, but it still comes
up with an empty text file (even though there are quite a few
directories that contain "CFI-").

You don't close the file properly. Rather use the block form of File.open.

  robert

#11

Geoff wrote:

Just to follow up, I did try this and it worked. I also want to add
that the reason I was trying to use Dir is because in searching for
solutions to this I found reference to it being faster. I would still
love to hear any feedback on how to optimize this or change the
solution so that it would speed things up. Searching a 60gb hard drive
this way takes a while. :slight_smile:

In that case emulate (or better yet, use GNU/Linux! :wink: the behavior
of the slocate(1) and updatedb(1) tools on GNU/Linux. The
updatedb(1) tool just stores all paths available on your system... like

  Find.find('/') do |path| puts path end

into a text file. Then slocate(1) simply grep(1)s for your query in
that text file. This approach is *much* faster because you
pre-compute all the paths on your system.

Imagine how slow Google would be if they searched the entire WWW
instead of searching through a pre-computed index of the WWW!