[Yum] Generate a List of RPMS ( formatting corrected )

[seth vidal]

On Fri, 2006-09-08 at 17:25 +0530, Jitendra Nair wrote:

> I will try and explain it Again
> 
> capability  ==  depstring  as  in   "yum install depstring1 depstring2".
>    
> Given  a set of depstring's  i need to know the package that provides
> each depstring and the other packages this package is dependent on. 
> the  way i am doing it till now was using 'pexpect' and run the command
> "yum install depstring1 depstring2 depstring3 ..."  and the capture stdout
> and parse the output and generate the rpms list.Why i am doing this
> because the build team needs the list for some reason.
> 
> 
> Now need to do it using the yum api.
> So i will write the psuedocode  again :
> 
> deplist = [ depstring1 , depstring2 , ...]
> 
> for depstring in deplist:
>     packages.append ( yum.YumBase.returnPackageByDep ( depstring ) )
> 
> for po in packages :
>      yum.tsInfo.addInstall (po)
>      yum.buildTransaction()
>      mems = yum.tsInfo.getMembers()
>      for mem in  mems:
>          pkgtuple = mem.po.returnPackageTuple()
>      #From 'pkgtuple' generate filename
>      #save filename.       
> 
> Thank you s.v for the reply .

that pseudocode would mostly work but do you just want the resolved
packages for a specific machine or do you want, in general, all packages
that have a provide for the resolved package.

You might want to:
 - find the package objects that match the depstrings
 - iterate those packages using yum.YumBase.findDeps() (this, looking at
it now, is a stupid method and should take package objects, not
userstrings)

 - that returns a dict, iterate that for each print each output


to see how this works just run:
yum deplist somepkgname

-sv