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extlinux-conf-builder: Fix warning when building in chroot

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When using extlinux-conf-builder in a nix build using chroots, the
following error message could be seen:

/nix/store/XXX-extlinux-conf-builder.sh: line 121: cd: /nix/var/nix/profiles: No such file or directory

To avoid this, just skip the code path parsing /nix/var/nix/profiles
when $numGenerations (passed from the command line) is 0 (which is the
only legal value of $numGenerations in a nix build context).
This commit is contained in:
Tuomas Tynkkynen 2015-07-25 23:57:55 +03:00
parent a6c95a3f7d
commit 8665b0d8b1
1 changed files with 12 additions and 10 deletions
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22
nixos/modules/system/boot/loader/generic-extlinux-compatible/extlinux-conf-builder.sh
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@ -115,16 +115,18 @@ EOF
addEntry $default default >> $tmpFile
# Add up to $numGenerations generations of the system profile to the menu,
# in reverse (most recent to least recent) order.
for generation in $(
(cd /nix/var/nix/profiles && ls -d system-*-link) \
| sed 's/system-\([0-9]\+\)-link/\1/' \
| sort -n -r \
| head -n $numGenerations); do
link=/nix/var/nix/profiles/system-$generation-link
addEntry $link $generation
done >> $tmpFile
if [ "$numGenerations" -gt 0 ]; then
# Add up to $numGenerations generations of the system profile to the menu,
# in reverse (most recent to least recent) order.
for generation in $(
(cd /nix/var/nix/profiles && ls -d system-*-link) \
| sed 's/system-\([0-9]\+\)-link/\1/' \
| sort -n -r \
| head -n $numGenerations); do
link=/nix/var/nix/profiles/system-$generation-link
addEntry $link $generation
done >> $tmpFile
fi
mv -f $tmpFile $target/extlinux/extlinux.conf