PPM problem, running ppm in batch file

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Hi Folks, I am a novice in batch file programming and I am having a problem writing a batch file to install Perl modules. Here is the code

:: opt_ppm_patch.bat 
:: installs ppm packages
@echo off

echo Adding the current directory to Perl Package Manager (PPM)
ppm rep add REPOS .

:libxml_perl
echo Installing libxml-perl package
ppm query libxml-perl 
IF NOT "%OUT%" == "No matches" goto XML_REG
ppm install libxml-perl.ppd


:XML_REG
ppm query XML-RegExp
IF NOT "%OUT%" == "No matches" goto XML_DOM
echo Installing XML-RegExp package
ppm install XML-RegExp.ppd


:XML_DOM
ppm query XML-DOM
IF NOT "%OUT%" == "No matches" goto END
echo Installing XML-DOM package
ppm install XML-DOM.ppd

:END
echo Deleting the repository entry from PPM
ppm rep del REPOS
echo Completed installing perl modules.
[download]

And here is the output of the above code

Adding the current directory to Perl Package Manager (PPM)
Repositories:
[1] REPOS
[ ] my
[ ] new
[ ] path
[download]

The problem is the first ppm command is executed successfully and the batch file just exits out when done. Can any one please explain as to why is such a thing happening and any work around for this problem Thanks and Regards, Sid

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Re: PPM problem, running ppm in batch file by holli (Abbot) on Aug 31, 2006 at 11:34 UTC
ppm is a batch file itself. if you call a batch file from another batch file the calling batchfile ends. If you don't want that behaviour you have to call the batch using the `call` keyword. Hence your code becomes :: opt_ppm_patch.bat :: installs ppm packages @echo off echo Adding the current directory to Perl Package Manager (PPM) call ppm rep add REPOS . :libxml_perl echo Installing libxml-perl package call ppm query libxml-perl IF NOT "%OUT%" == "No matches" goto XML_REG call ppm install libxml-perl.ppd :XML_REG call ppm query XML-RegExp IF NOT "%OUT%" == "No matches" goto XML_DOM echo Installing XML-RegExp package call ppm install XML-RegExp.ppd :XML_DOM call ppm query XML-DOM IF NOT "%OUT%" == "No matches" goto END echo Installing XML-DOM package call ppm install XML-DOM.ppd :END echo Deleting the repository entry from PPM call ppm rep del REPOS echo Completed installing perl modules. [download] holli, /regexed monk/	[reply] [d/l] [select]
Re: PPM problem, running ppm in batch file by Burak (Chaplain) on Aug 31, 2006 at 17:51 UTC
Why don't you just use Perl? i.e.: system(), exec() or bacticks or use()ing PPM modules directly? That code you wrote gives me the creeps :p	[reply]