Rails - Jun 2006 - Checking if a directory is empty using File

Hi,

I have one minor issue.  I''m trying to check whether a directory is
empty
given some path to the directory.

My code does the following:

if(File.directory?(dirpath))   # dirpath = public/images/1
  if(File.zero?(dirpath))
    FileUtils.rm_rf(dirpath)
  end
end

The problem is, while testing this, if I put a file in the directory and run
the above code, it still ends up deleting the entire directory which
doesn''t
make sense since File.zero? should not return true.  I even tried using
File.size?(dirpath) but that doesn''t work either.

Any help would be appreciated.

Thanks,

Saureen.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://wrath.rubyonrails.org/pipermail/rails/attachments/20060606/a781bd1c/attachment.html

try something like this instead (in irb)

if File.directory?(dirname)
  begin
    # try to delete the directory
    # Dir.delete raises a SystemCallError if the named directory is not
empty
    Dir.delete(dirpath)
  rescue SystemCallError => e
    # handle the exception here (ie, directory was not deleted because it
was not empty)
    puts e
  end
else
  puts "#{dirname} is not a directory"
end




On 6/6/06, Sam Donaldson <samonderous@gmail.com>
wrote:
>
> Hi,
>
> I have one minor issue.  I''m trying to check whether a directory
is empty
> given some path to the directory.
>
> My code does the following:
>
> if(File.directory?(dirpath))   # dirpath = public/images/1
>   if(File.zero?(dirpath))
>     FileUtils.rm_rf(dirpath)
>   end
> end
>
> The problem is, while testing this, if I put a file in the directory and
> run the above code, it still ends up deleting the entire directory which
> doesn''t make sense since File.zero? should not return true.  I
even tried
> using File.size?(dirpath) but that doesn''t work either.
>
> Any help would be appreciated.
>
> Thanks,
>
> Saureen.
>
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://wrath.rubyonrails.org/pipermail/rails/attachments/20060606/fe4c8675/attachment.html

Sam Donaldson wrote:
> Hi,
> 
> I have one minor issue.  I''m trying to check whether a directory
is
> empty
> given some path to the directory.
> 
> My code does the following:
> 
> if(File.directory?(dirpath))   # dirpath = public/images/1
>   if(File.zero?(dirpath))
>     FileUtils.rm_rf(dirpath)
>   end
> end
> 
> The problem is, while testing this, if I put a file in the directory and 
> run
> the above code, it still ends up deleting the entire directory which 
> doesn''t
> make sense since File.zero? should not return true.  I even tried using
> File.size?(dirpath) but that doesn''t work either.
> 
> Any help would be appreciated.
File.zero? will just tell you if you have a zero-length file, which a 
directory is not.

You could say

if Dir.entries(dirpath).size < 2 # two entries for "." and
".."

What I''d do, though is:

require ''pathname''
if Pathname.new(dirpath).children.size == 0

I''ve already spent enough time struggling with File and Dir; Pathname 
makes things like this a lot easier:-)

--Al Evans

-- 
Posted via http://www.ruby-forum.com/.

Dir["*"].empty?

> -------- Original-Nachricht --------
> Datum: Tue, 6 Jun 2006 16:57:21 +0200
> Von: Al Evans <anejr@alevans.com>
> An: rails@lists.rubyonrails.org
> Betreff: [Rails] Re: Checking if a directory is empty using File
> 
> Sam Donaldson wrote:
> > Hi,
> > 
> > I have one minor issue.  I''m trying to check whether a
directory is
> > empty
> > given some path to the directory.
> > 
> > My code does the following:
> > 
> > if(File.directory?(dirpath))   # dirpath = public/images/1
> >   if(File.zero?(dirpath))
> >     FileUtils.rm_rf(dirpath)
> >   end
> > end
> > 
> > The problem is, while testing this, if I put a file in the directory
and
> > run
> > the above code, it still ends up deleting the entire directory which 
> > doesn''t
> > make sense since File.zero? should not return true.  I even tried
using
> > File.size?(dirpath) but that doesn''t work either.
> > 
> > Any help would be appreciated.
> 
> File.zero? will just tell you if you have a zero-length file, which a 
> directory is not.
> 
> You could say
> 
> if Dir.entries(dirpath).size < 2 # two entries for "." and
".."
> 
> What I''d do, though is:
> 
> require ''pathname''
> if Pathname.new(dirpath).children.size == 0
> 
> I''ve already spent enough time struggling with File and Dir;
Pathname
> makes things like this a lot easier:-)
> 
> --Al Evans
> 
> -- 
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails

Why not simply use that expression?

 Dir["*"].empty?




Al Evans schrieb:
> Sam Donaldson wrote:
>   
>> Hi,
>>
>> I have one minor issue.  I''m trying to check whether a
directory is
>> empty
>> given some path to the directory.
>>
>> My code does the following:
>>
>> if(File.directory?(dirpath))   # dirpath = public/images/1
>>   if(File.zero?(dirpath))
>>     FileUtils.rm_rf(dirpath)
>>   end
>> end
>>
>> The problem is, while testing this, if I put a file in the directory
and
>> run
>> the above code, it still ends up deleting the entire directory which 
>> doesn''t
>> make sense since File.zero? should not return true.  I even tried using
>> File.size?(dirpath) but that doesn''t work either.
>>
>> Any help would be appreciated.
>>     
>
> File.zero? will just tell you if you have a zero-length file, which a 
> directory is not.
>
> You could say
>
> if Dir.entries(dirpath).size < 2 # two entries for "." and
".."
>
> What I''d do, though is:
>
> require ''pathname''
> if Pathname.new(dirpath).children.size == 0
>
> I''ve already spent enough time struggling with File and Dir;
Pathname
> makes things like this a lot easier:-)
>
> --Al Evans
>
>