CODEWITHSUNDEEP
loopsbatch-file
Dom Crosbie
Dom Crosbie

Reputation: 13

Windows Batch : Iterate through file names while performing an action on each one?

Currently my loop reads files contained (ending in .al). But when I try to Set/Alter the file names it simply skips to the final file and works with that one. (xxx.al) I have attempted to use EnableDelayedExpansion but still can not resolve. Final output should be as follows

spconv -if raw -of wav xxx.al xxx.wav

But instead of just xxx.al file, all files contained should be iterated through. i.e 

spconv -if raw -of wav abc.al abc.wav
spconv -if raw -of wav def.al def.wav

Current batch command is as follows

@echo off

for %%d in (*.al) do (
set str=%%d
set string=%%d:C:\test\test\=%
set string2=%string:.al=%
spconv -if raw -of wav %string% %string2%.wav
)

Upvotes: 1

Views: 216

Answers (2)

Hackoo
Hackoo

Reputation: 18827

for /? in the command-line gives help about this syntax.

In addition, substitution of FOR variable references has been enhanced. You can now use the following optional syntax:

%~I         - expands %I removing any surrounding quotes (")
%~fI        - expands %I to a fully qualified path name
%~dI        - expands %I to a drive letter only
%~pI        - expands %I to a path only
%~nI        - expands %I to a file name only
%~xI        - expands %I to a file extension only
%~sI        - expanded path contains short names only
%~aI        - expands %I to file attributes of file
%~tI        - expands %I to date/time of file
%~zI        - expands %I to size of file
%~$PATH:I   - searches the directories listed in the PATH
               environment variable and expands %I to the
               fully qualified name of the first one found.
               If the environment variable name is not
               defined or the file is not found by the
               search, then this modifier expands to the
               empty string

The modifiers can be combined to get compound results:

%~dpI       - expands %I to a drive letter and path only
%~nxI       - expands %I to a file name and extension only
%~fsI       - expands %I to a full path name with short names only
%~dp$PATH:I - searches the directories listed in the PATH
               environment variable for %I and expands to the
               drive letter and path of the first one found.
%~ftzaI     - expands %I to a DIR like output line

In the above examples %I and PATH can be replaced by other valid values. The %~ syntax is terminated by a valid FOR variable name. Picking upper case variable names like %I makes it more readable and avoids confusion with the modifiers, which are not case sensitive.

There are different letters you can use like f for "full path name", d for drive letter, p for path, and they can be combined. %~ is the beginning for each of those sequences and a number I denotes it works on the parameter %I (where %0 is the complete name of the batch file, just like you assumed).

In batch file you should write %%I instead of %I to escape % character.

And your batch looks like this one :

@echo off
for %%I in (*.al) do spconv -if raw -of wav %%I %~nI.wav
Pause

Upvotes: 0

Stephan
Stephan

Reputation: 56155

for %%d in (*.al) do spconv -if raw -of wav %%d %~nd.wav

see for /? - especially the last part of it.

Upvotes: 2

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