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comp.lang.ruby

Recursing through directories

Gabriel Dragffy

9/26/2007 3:25:00 PM

Hi there

I have a simple script (untested)

require 'ftools'
Dir.entries( '/Volumes/' ).each |item| do
File.move( item, item.gsub( /\//, '-' ) ) if File.file? item
end

The idea is to remove slashes from file names, I can later extend
this to include other characters also. But how the deuce can I make
it go in to each directoy to make sure each file is renamed even many
subdirectories down?

Many thanks

Gabriel
13 Answers

Stefano Crocco

9/26/2007 3:29:00 PM

0

Alle mercoledì 26 settembre 2007, Gabriel Dragffy ha scritto:
> Hi there
>
> I have a simple script (untested)
>
> require 'ftools'
> Dir.entries( '/Volumes/' ).each |item| do
> File.move( item, item.gsub( /\//, '-' ) ) if File.file? item
> end
>
> The idea is to remove slashes from file names, I can later extend
> this to include other characters also. But how the deuce can I make
> it go in to each directoy to make sure each file is renamed even many
> subdirectories down?
>
> Many thanks
>
> Gabriel

I think that the Find module is what you need (ri Find).

Stefano

Sebastian Hungerecker

9/26/2007 3:34:00 PM

0

Gabriel Dragffy wrote:
> require 'ftools'
> Dir.entries( '/Volumes/' ).each |item| do
> File.move( item, item.gsub( /\//, '-' ) ) if File.file? item
> end
>
> The idea is to remove slashes from file names, I can later extend
> this to include other characters also. But how the deuce can I make
> it go in to each directoy to make sure each file is renamed even many
> subdirectories down?

Use Dir['/Volumes/**/*'] (or even *-* to only get files with a slash in them)
instead of Dir.entries.

HTH,
Sebastian
--
Jabber: sepp2k@jabber.org
ICQ: 205544826

Gabriel Dragffy

9/26/2007 3:54:00 PM

0


On 26 Sep 2007, at 16:33, Sebastian Hungerecker wrote:

> Gabriel Dragffy wrote:
>> require 'ftools'
>> Dir.entries( '/Volumes/' ).each |item| do
>> File.move( item, item.gsub( /\//, '-' ) ) if File.file? item
>> end
>>
>> The idea is to remove slashes from file names, I can later extend
>> this to include other characters also. But how the deuce can I make
>> it go in to each directoy to make sure each file is renamed even many
>> subdirectories down?
>
> Use Dir['/Volumes/**/*'] (or even *-* to only get files with a
> slash in them)
> instead of Dir.entries.
>

Will this operate recursively?

Many thanks

Gabriel

Andrea Fazzi

9/26/2007 6:04:00 PM

0

Gabriel Dragffy ha scritto:
>
> On 26 Sep 2007, at 16:33, Sebastian Hungerecker wrote:
>
>> Gabriel Dragffy wrote:
>>> require 'ftools'
>>> Dir.entries( '/Volumes/' ).each |item| do
>>> File.move( item, item.gsub( /\//, '-' ) ) if File.file? item
>>> end
>>>
>>> The idea is to remove slashes from file names, I can later extend
>>> this to include other characters also. But how the deuce can I make
>>> it go in to each directoy to make sure each file is renamed even many
>>> subdirectories down?
>>
>> Use Dir['/Volumes/**/*'] (or even *-* to only get files with a slash
>> in them)
>> instead of Dir.entries.
>>
>
> Will this operate recursively?
>
> Many thanks
>
> Gabriel
>
>
>
>



Yes.

Dir['/Volumes/**/*'] will match the directories recursively.

Bye.
Andrea

Gabriel Dragffy

9/27/2007 12:37:00 PM

0

On 26 Sep 2007, at 19:04, Andrea Fazzi wrote:
>>
>> Will this operate recursively?
>>
>> Many thanks
>>
>> Gabriel
>>
>>
>>
>>
>
>
>
> Yes.
>
> Dir['/Volumes/**/*'] will match the directories recursively.
>
> Bye.
> Andrea
>
>


Thank you for your help. I have a little trouble getting this script
to operate properly and its given me an error I haven't come across
before...

Dir['/Volumes/**/*'].each { |file| File.move( file, gsub( /\//,
"-") ) if File.file?( file ) }
TypeError: $_ value need to be String (nil given)
from (irb):4:in `gsub'
from (irb):4
from (irb):4:in `each'
from (irb):4

What might this mean?


Many thanks

Gabriel

Rob Biedenharn

9/27/2007 1:14:00 PM

0

On Sep 27, 2007, at 8:37 AM, Gabriel Dragffy wrote:
> On 26 Sep 2007, at 19:04, Andrea Fazzi wrote:
>>>
>>> Will this operate recursively?
>>>
>>> Many thanks
>>>
>>> Gabriel
>>
>> Yes.
>>
>> Dir['/Volumes/**/*'] will match the directories recursively.
>>
>> Bye.
>> Andrea
>
> Thank you for your help. I have a little trouble getting this
> script to operate properly and its given me an error I haven't come
> across before...
>
> Dir['/Volumes/**/*'].each { |file| File.move( file, gsub( /\//,
> "-") ) if File.file?( file ) }
> TypeError: $_ value need to be String (nil given)
> from (irb):4:in `gsub'
> from (irb):4
> from (irb):4:in `each'
> from (irb):4
>
> What might this mean?
>
> Many thanks
>
> Gabriel

You're not providing a receiver for the gsub() method. Having said
that, though, what it seems like you're trying to do is almost
certainly a bad idea. It looks like you're prepared to move all
files into the current directory. If that's not what you intended,
then it's probably very good that you got an error.

-Rob

Rob Biedenharn http://agileconsult...
Rob@AgileConsultingLLC.com

Gabriel Dragffy

9/27/2007 2:56:00 PM

0


On 27 Sep 2007, at 14:14, Rob Biedenharn wrote:


>
> You're not providing a receiver for the gsub() method. Having said
> that, though, what it seems like you're trying to do is almost
> certainly a bad idea. It looks like you're prepared to move all
> files into the current directory. If that's not what you intended,
> then it's probably very good that you got an error.
>
> -Rob

I'm sorry, you are so right. I really can't seem to get the hang of
this. You're correct in that it is moving all files in to the current
directory. How can I make it so it just renames them in place, and
which resource should I be ideally reading to understand this better?

Best regards

Gabriel

Rob Biedenharn

9/27/2007 3:35:00 PM

0

On Sep 27, 2007, at 10:55 AM, Gabriel Dragffy wrote:
> On 27 Sep 2007, at 14:14, Rob Biedenharn wrote:
>> You're not providing a receiver for the gsub() method. Having
>> said that, though, what it seems like you're trying to do is
>> almost certainly a bad idea. It looks like you're prepared to
>> move all files into the current directory. If that's not what you
>> intended, then it's probably very good that you got an error.
>>
>> -Rob
>
> I'm sorry, you are so right. I really can't seem to get the hang of
> this. You're correct in that it is moving all files in to the
> current directory. How can I make it so it just renames them in
> place, and which resource should I be ideally reading to understand
> this better?
>
> Best regards
>
> Gabriel

If you want to rename files having names that meet some pattern, why
don't you start with print the names like this (files having "foo"
somewhere in their name):

Dir['**/*'].each {|f| puts f if f =~ /foo/ }

but beware that Dir['**/*'] is going to plow through the directory
structure and make an array (a big one) of all the file names before
the block gets to see any of those names.

Perhaps you'd get some better answers if you post what you're trying
to accomplish, the attempt you've made (or what you think should
work), and the actual results you see.

Also, note that my example starts from the current directory (which
was ~/ in my case). It's always better to get a script like yours
working on a small bit of known data (and perhaps be non-destructive)
before turning it loose on your entire disk. (In my case, it found
many files that were throwaway "foo" files, but also many with
"foot", "footnote", "food", and "footer" that were clearly not
throwaway files.)

-Rob

Rob Biedenharn http://agileconsult...
Rob@AgileConsultingLLC.com

Gabriel Dragffy

9/28/2007 9:05:00 AM

0


On 27 Sep 2007, at 16:35, Rob Biedenharn wrote:


>
> If you want to rename files having names that meet some pattern,
> why don't you start with print the names like this (files having
> "foo" somewhere in their name):
>
> Dir['**/*'].each {|f| puts f if f =~ /foo/ }
>
> but beware that Dir['**/*'] is going to plow through the directory
> structure and make an array (a big one) of all the file names
> before the block gets to see any of those names.
>
> Perhaps you'd get some better answers if you post what you're
> trying to accomplish, the attempt you've made (or what you think
> should work), and the actual results you see.
>
> Also, note that my example starts from the current directory (which
> was ~/ in my case). It's always better to get a script like yours
> working on a small bit of known data (and perhaps be non-
> destructive) before turning it loose on your entire disk. (In my
> case, it found many files that were throwaway "foo" files, but also
> many with "foot", "footnote", "food", and "footer" that were
> clearly not throwaway files.)

Hi Rob

Thanks for your help.

What I am trying to achieve is replace the slashes (/) in file/
directory names under a certain directory. So, for example, I want to
recursively rename offending files that are under /Volumes, but I
don't want them moved from their current directory... just renamed.
What's the best way to go about that?

Regards

Gabe

Rob Biedenharn

9/28/2007 1:17:00 PM

0

On Sep 28, 2007, at 5:04 AM, Gabriel Dragffy wrote:
> On 27 Sep 2007, at 16:35, Rob Biedenharn wrote:
>> If you want to rename files having names that meet some pattern,
>> why don't you start with print the names like this (files having
>> "foo" somewhere in their name):
>>
>> Dir['**/*'].each {|f| puts f if f =~ /foo/ }
>>
>> but beware that Dir['**/*'] is going to plow through the directory
>> structure and make an array (a big one) of all the file names
>> before the block gets to see any of those names.
>>
>> Perhaps you'd get some better answers if you post what you're
>> trying to accomplish, the attempt you've made (or what you think
>> should work), and the actual results you see.
>>
>> Also, note that my example starts from the current directory
>> (which was ~/ in my case). It's always better to get a script
>> like yours working on a small bit of known data (and perhaps be
>> non-destructive) before turning it loose on your entire disk. (In
>> my case, it found many files that were throwaway "foo" files, but
>> also many with "foot", "footnote", "food", and "footer" that were
>> clearly not throwaway files.)
>
> Hi Rob
>
> Thanks for your help.
>
> What I am trying to achieve is replace the slashes (/) in file/
> directory names under a certain directory. So, for example, I want
> to recursively rename offending files that are under /Volumes, but
> I don't want them moved from their current directory... just
> renamed. What's the best way to go about that?
>
> Regards
>
> Gabe

This doesn't make sense. There aren't slashes in the name, those are
separating directories along the path to the file.

/Volumes/Macintosh HD/Users/rab/code/ruby/quiz/081-Hash to OpenStruct/
another.yml
/Volumes/Macintosh HD/Users/rab/code/ruby/quiz/081-Hash to OpenStruct/
hash2ostruct.rb
/Volumes/Macintosh HD/Users/rab/code/ruby/quiz/081-Hash to OpenStruct/
openstruct.yml
/Volumes/Macintosh HD/Users/rab/code/ruby/quiz/081-Hash to OpenStruct/
recursive.yml

These files have some directories containing spaces in the name, but
the name of each file is just the last part (another.yml,
hash2ostruct.rb, openstruct.yml, recursive.yml). If I go to my home
directory and rename 'code' to be 'source', I haven't changed the
names of the files, but I *have* changed the path needed to reach them.

If you really *do* have files with '/' in their names, chances are
you need to use a low-level utility to recover from that mess. If
you're just seeing in the Mac OS X Finder that there are "slashes" in
the name of a file, perhaps you're seeing an artifact of the Mac's
filesystem. If you open a Terminal, you'll see that there the file
has a ':' in the place that Finder shows you '/'.

Perhaps you can find these files (like I said, see if you find them
properly before to operate on them) with Ruby like this:
ruby -e 'puts Dir["**/*:*"]'
But know that there are a great many files that *NEED* to contain ':'
created by iChat, AddressBook, Safari, and others. (You might not
want to mess with anything under a Library directory ;-)

-Rob

Rob Biedenharn http://agileconsult...
Rob@AgileConsultingLLC.com