Re: [gentoo-user] Recreating a directory structure and indicating a files presence

[Michael Mol]

On Thu, Sep 20, 2012 at 11:54 AM, Pandu Poluan <pandu@××××××.info> wrote:
>
> On Sep 20, 2012 10:04 PM, "Michael Mol" <mikemol@×××××.com> wrote:
>>
>> On Thu, Sep 20, 2012 at 10:48 AM, Neil Bothwick <neil@××××××××××.uk>
>> wrote:
>> > On Thu, 20 Sep 2012 16:13:08 +0200, Alan McKinnon wrote:
>> >
>> >> On the archive:
>> >>
>> >> find /root/of/dir/structure -type d > dirs.txt
>> >> find /root/of/dir/structure -type f > files.txt
>> >
>> > This will add '/root/of/dir/structure' to the start of each path. would
>> > it be better to do?
>> >
>> > cd /root/of/dir/structure
>> > find -type d > ../dirs.txt
>> > find -type f > ../files.txt
>>
>> I see your path correction, and raise you:
>> * whitespace-safe folders
>> * Automatic copy to remote system.
>> * Automatic new file and folder creation
>> * Using those pretty xargs parameters.
>>
>> cd /root/of/dir/structure
>> find . -type d -print0 > ~/dirs.txt
>> find . -type d -print0 > ~/files.txt
>>
>> scp dirs.txt files.txt remote.system:
>>
>> ssh remote.system <<ENDSSH
>> cd /root/of/new/structure
>> cat ~/dirs.txt|xargs -0 mkdir -p
>> cat ~/files.txt|xargs -0 touch
>> ENDSSH
>>
>>
>
> Cool... except that your raise is invalid (should've used -type f in the 3rd
> line)...
>
> ;-)
>

Heh. It's also performing a bunch of unnecessary mkdir commands. I
mean, "find -type d" isn't going to return a subpath of a folder until
it's first returned the folder, so -p is unnecessary. For a better
speed gain, you'd want to keep -p, but filter out any folder which has
a subfolder, to reduce the number of mkdir commands issued. It's
possible mkdir performs this optimization internally, though. And I
don't know how to quickly do that filter on the command line.

-- 
:wq