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aszlig f4e742594d
nixos: Fix detection of btrfs root volume 
Regression introduced by 801c920e95.

Since then, the btrfsSimple subtest of the installer VM test fails with:

Btrfs did not return a path for the subvolume at /

The reason for this is that the output for "btrfs subvol show" has
changed between version 4.8.2 and 4.13.1.

For example the output of "btrfs subvol show /" in version 4.8.2 was:

/ is toplevel subvolume

In version 4.13.1, the output now is the following and thus the regular
expressions used in nixos-generate-config.pl and install-grub.pl now
match (which results in the error mentioned above):

/
        Name:                   <FS_TREE>
        UUID:                   -
        Parent UUID:            -
        Received UUID:          -
        Creation time:          -
        Subvolume ID:           5
        Generation:             287270
        Gen at creation:        0
        Parent ID:              0
        Top level ID:           0
        Flags:                  -
        Snapshot(s):

In order to fix this I've changed nixos-generate-config.pl and
install-grub.pl, because both use "btrfs subvol show" in a similar vein,
so the regex for parsing the output now doesn't match anymore whenever
the volume path is "/", which should result in the same behaviour as we
had with btrfs-progs version 4.8.2.

Tested against the btrfsSimple, btrfsSubvols and btrfsSubvolDefault
subtests of the installer VM test and they all succeed now.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
2017-10-11 04:30:52 +02:00
..
doc/manual 18.03 release notes: mention ZNC mutability change 2017-10-08 00:43:40 +01:00
lib Deduplicate some filterSource invocations 2017-08-29 20:27:04 -04:00
maintainers Don't generate instance-store AMIs 2017-09-28 17:33:13 +02:00
modules nixos: Fix detection of btrfs root volume 2017-10-11 04:30:52 +02:00
tests Merge pull request #29994 from bachp/minio-update 2017-10-08 12:12:32 +01:00
COPYING
default.nix
README
release-combined.nix nixos/release-combined: remove basic kernel tests 2017-09-16 12:45:30 +02:00
release-small.nix
release.nix treewide: mark a bunch of failing builds as broken 2017-10-01 00:26:52 +03:00

README 

*** NixOS ***

NixOS is a Linux distribution based on the purely functional package
management system Nix.  More information can be found at
http://nixos.org/nixos and in the manual in doc/manual.