Find

Hi,

the Ruby built-in Find module lacks a lot of features the
GNU find tools has. I wrote a new one (~170 lines).

http://www.bertram-scharpf.de/tmp/find.rb

Maybe somebody likes it.

Bertram

On Oct 7, 6:41 am, Bertram S. [email protected] wrote:

Hi,

the Ruby built-in Find module lacks a lot of features the
GNU find tools has. I wrote a new one (~170 lines).

http://www.bertram-scharpf.de/tmp/find.rb

Maybe somebody likes it.

I wrote file-find not long ago:

http://raa.ruby-lang.org/project/file-find/

Regards,

Dan

On Sun, 7 Oct 2007, Daniel B. wrote:

Maybe somebody likes it.

I wrote file-find not long ago:

http://raa.ruby-lang.org/project/file-find/

Time to merge stuff into Ruby proper if so many (…) people see the
need
to improve the aparently meager features of the built-in find?
*t

Tomas P.'s Mailing L. wrote:

http://www.bertram-scharpf.de/tmp/find.rb

Tomas P.
http://sourcepole.com - Linux & Open Source Solutions

As long as it doesn’t get more bigger and fatter then GNU Find is…

Then I’d be happy :slight_smile:

http://raa.ruby-lang.org/project/file-find/

Both seem complementary. Bertram has sorting built-in and is not
backwards compatible.

After a quick look, Bertram’s code also has silly inefficient things
like:
dir = (Dir.open @fullpath do |d| d.entries end) - SPECIAL_DIRS
which can just be:
dir = Dir.entries(@fullpath) - SPECIAL_DIRS
and the Etc module may be checked several times depending on what you
request.

Daniel’s has searching based on different much more rich criteria and
also breaks backwards compatibility. It lacks sorting and the docs
lack simple examples. I did not check the code yet.

On Oct 7, 3:17 pm, Tomas P.'s Mailing L. [email protected]
wrote:

Maybe somebody likes it.

I wrote file-find not long ago:

http://raa.ruby-lang.org/project/file-find/

Time to merge stuff into Ruby proper if so many (…) people see the need
to improve the aparently meager features of the built-in find?
*t

My experience on ruby-core tells me that the odds of getting the
radical changes we would want into the stdlib are about nil unless
there’s a general outcry.

Regards,

Dan

Hi,

Am Montag, 08. Okt 2007, 20:35:04 +0900 schrieb gga:

dir = Dir.entries(@fullpath) - SPECIAL_DIRS
Argh!

and the Etc module may be checked several times depending on what you
request.

I already corrected this yesterday and upload it now.

Bertram

On Oct 7, 2007, at 6:41 AM, Bertram S. wrote:

Hi,

the Ruby built-in Find module lacks a lot of features the
GNU find tools has. I wrote a new one (~170 lines).

http://www.bertram-scharpf.de/tmp/find.rb

Maybe somebody likes it.

this is one of the very smallest directories i am working with:

[[email protected] cfadmin]$ find /mnt/yacht0/data/night_files/|wc -l
69287

[[email protected] cfadmin]$ ruby a.rb
user system total real
bertram.scharpf.find 2.140000 1.230000 3.370000 ( 7.602333)
alib.util.find 1.360000 0.440000 1.800000 ( 1.812519)

[[email protected] cfadmin]$ cat a.rb
require ‘benchmark’
require ‘alib’
require ‘bertram.scharpf.find.rb’

top = ‘/mnt/yacht0/data/night_files/’

Benchmark.bm do |b|
b.report(‘bertram.scharpf.find’){ Find.open(top){|x|} }
b.report(‘alib.util.find’){ alib.util.find(top){|x|} }
end

also there is alib.util.find2 which yields the stat together with the
path, preventing and extra stat on the pathname. in practice doing
something like

def method_missing m, *a, &b
stat.send m, *a, &b
end

means you have to use a ton of code since it’s possible that

f.size ### no error
f.mtime ### ENOENT

btw mine

http://codeforpeople.com/lib/ruby/alib/alib-0.5.0/lib/alib-0.5.0/
find2.rb

isn’t a spectacular implementation, it is based on Motoyuki
Kasahara’s 2001 lib, which used to be on the raa, called find2 - but
it’s reasonably fast, does depth and breath, caches stats, and
handles files evaporation from the filesystem or not being accessible
due to permissions errors.

i think all these libraries prove that a new find mechanism needs to
be incorporated into the stdlib! we should take the best features
from all the various libs and propose a new library that is backward
compatible with the built-in find.

kind regards.

a @ http://codeforpeople.com/

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