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Scan whole dir tree and do something which each (sub)folder?
Posted: 15 Apr 2012 05:21
by pstein
How can I scan a whole directory tree beginning with top node
D:\test\path to base folder\
and do something with each folder? It must be something like
set basefolder=D:\test\path to base folder\
set targetfolder=D:\target\
for %%a in (recursive("%basefolder%/*")) do (
mkdir "%targetfolder%\%%a"
<do more>)
Look at the pseudo code above: How can I get the RELATIVE path in %aa (without leading path to basefolder)?
The code above should NOT be performed for files (only for folders).
Peter
Re: Scan whole dir tree and do something which each (sub)fol
Posted: 15 Apr 2012 06:05
by dbenham
You are going to groan (and smile) when you see how simple it is to reproduce an empty directory tree
Code: Select all
xcopy /t /e "D:\test\path to base folder\*" "D:\target\"
Folder "D:\target\" may or may not already exist - it works either way.
If you want to do other things besides create the directories, then you need a FOR /R /D loop to iterate through each folder in the tree.
Code: Select all
for /d /r "D:\test\path to base folder" %%F in (*) do (
rem %%F contains the full path of a folder in the tree
echo %%F
)
Dave Benham
Re: Scan whole dir tree and do something which each (sub)fol
Posted: 15 Apr 2012 06:20
by foxidrive
dbenham wrote:Code: Select all
for /d /r "D:\test\path to base folder" %%F in (*) do (
)
Dave, the FOR /D command has issues in some cases when long directory names are used.
It's always safer to use FOR /F as it hasn't demonstrated any flaws in many years of use.
(code below is untested)
Code: Select all
@echo off
for /f "delims=" %%a in ('dir "D:\test\path to base folder" /ad /b /s') do (
echo %%a
echo %%~nxa
)
Re: Scan whole dir tree and do something which each (sub)fol
Posted: 15 Apr 2012 22:12
by dbenham
@foxidrive: Any more details on what Windows versions or what specific scenarios have problems
What are the problematic results
I haven't personally run into any problem on Vista (32 or 64), but then again, I don't use FOR /D /R very often.
The command is kind of interesting.
This does a breadth first iteration of the directory tree, starting with the children of the root folder:
This does a depth first iteration of the directory tree, starting with the root folder.
Are you aware of any problems with FOR /R
Dave Benham
Re: Scan whole dir tree and do something which each (sub)fol
Posted: 16 Apr 2012 00:29
by foxidrive
dbenham wrote:The command is kind of interesting.
This does a breadth first iteration of the directory tree, starting with the children of the root folder:
That's curious.
Are you aware of any problems with FOR /R
No, Dave, and I don't have details of the issues. They were discussed in alt.msdos.batch.nt some years ago and the consensus was that any form other than a straight for-in-do and for /F and for /L were to be avoided.