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nixos/grub: Grub detection is much simpler using subvol show

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This commit is contained in:
William A. Kennington III 2014-05-02 00:44:36 -05:00
parent 429f785135
commit 87d5e457fe
1 changed files with 7 additions and 21 deletions
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28
nixos/modules/system/boot/loader/grub/install-grub.pl
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@ -135,35 +135,21 @@ sub GrubFs {
# BTRFS is a special case in that we need to fix the referrenced path based on subvolumes
if ($fs->type eq 'btrfs') {
my $subvol = "";
my ($status, @mounts) = runCommand('mount');
my ($status, @info) = runCommand("btrfs subvol show @{[$fs->device]}");
if ($status != 0) {
die "Failed to retreive mount info";
die "Failed to retreive subvolume info for @{[$fs->device]}";
}
my @subvols = join("", @mounts) =~ m/@{[$fs->device]} on [^\n]*subvol=([^,)]*)/;
my @subvols = join("", @info) =~ m/Name:[ \t\n]([^ \t\n]*)/;
if ($#subvols > 0) {
die "Btrfs device @{[$fs->device]} listed multiple times in mount\n"
die "Btrfs subvol name for @{[$fs->device]} listed multiple times in mount\n"
} elsif ($#subvols == 0) {
$subvol = $subvols[0];
} else {
my ($status, @btrfsOut) = runCommand("btrfs subvol get-default @{[$fs->mount]}");
if ($status != 0) {
die "Failed to retrieve btrfs default subvolume"
}
my @results = join("", @btrfsOut) =~ m/path ([^ ]*)/;
if ($#results > 0) {
die "Btrfs device @{[$fs->device]} has multiple default subvolumes\n";
} elsif ($#results == 1) {
$subvol = $results[0];
}
}
$path = "/$subvol" . $path;
$path = "/$subvols[0]$path";
}
}
}
if (not $search eq "") {
$search = "search --set=drive$driveid " . $search;
$path = "(\$drive$driveid)" . $path;
$path = "(\$drive$driveid)$path";
$driveid += 1;
}
}