[buildd-tools-devel] Bug#635320: Bug#635320: schroot: environment variable for setup.d scripts to detect alias

[Roger Leigh]

tags 635320 + patch
thanks

On Sun, Jul 24, 2011 at 09:20:47PM -0700, Vagrant Cascadian wrote:
> Package: schroot
> Version: 1.4.23-1
> Severity: wishlist
> 
> thanks for maintaining schroot!
> 
> it would be useful if schroot could set a variable (CHROOT_NAME_ALIAS?) that 
> contained the alias used, much like CHROOT_NAME shows which chroot is used:
> 
> so in schroot.conf:
> 
>   [sid]
>   aliases=default,unstable,experimental,some-wacky-sid-variant
>   description=sid
>   type=lvm-snapshot
>   device=/dev/prl/schroot_base
>   lvm-snapshot-options=--size 2G
>   location=/sid
>    
> which would allow for a setup.d script:
> 
>   #!/bin/sh
>   if [ "${CHROOT_NAME_ALIAS}" = "experimental" ] ; then
>     # some magic that configures experimental chroot here...
>   elif [ "${CHROOT_NAME_ALIAS}" = "some-wacky-sid-variant" ] ; then
>     # some magic that configures some-wacky-sid-variant chroot here...
>   fi
> 
> 
> this would save the need of having to set up a separate schroot.conf entry for 
> chroots that contain only minimal differences in the source chroot.
> 
> this would also allow options like apt-get dist-upgrade when using schroot 
> --all-source-chroots behave with fewer surprises, since it won't treat the 
> other entries as having a separate source chroot.

Preliminary support is in the attached patch against git master.  I'll
also test and backport for schroot 1.4.  Uses CHROOT_ALIAS in setup
scripts; SCHROOT_ALIAS_NAME in user environment.


Regards,
Roger

-- 
  .''`.  Roger Leigh
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