arch-nspawn should use the correct pacman config file

If arch-nspawn is called with -C, pacman inside the chroot will use
the provided configuration file. This should also be the case for
$pacconf_cmd and pacman outside the chroot.

If arch-nspawn is called without -C, pacman inside the chroot will
use $workdir/etc/pacman.conf -- again, $pacconf_cmd and pacman
outside the chroot should use that, too. So lets just set $pac_conf
in that case.

For example, Arch Linux 32 provides separate pacman configurations
inside /usr/share/devtools which use /etc/pacman.d/mirrorlist32 as
mirrorlist for their build commands (extra-i686-build, etc.). This
way, we can build i686 and x86_64 packages on the same x86_64 host
with very minimal changes to devtools.

1 files changed, 4 insertions, 3 deletions

diff --git a/arch-nspawn.in b/arch-nspawn.in
index e68e2e7..cebeb2e 100644
--- a/arch-nspawn.in
+++ b/arch-nspawn.in
@@ -52,16 +52,17 @@ shift 1
 
 [[ -z $working_dir ]] && die 'Please specify a working directory.'
 
+[[ -z $pac_conf ]] && pac_conf="$working_dir/etc/pacman.conf"
+
 if [[ -z $cache_dir ]]; then
-	cache_dirs=($(pacman -v 2>&1 | grep '^Cache Dirs:' | sed 's/Cache Dirs:\s*//g'))
+	cache_dirs=($(pacman --config "$pac_conf" -v 2>&1 | grep '^Cache Dirs:' | sed 's/Cache Dirs:\s*//g'))
 else
 	cache_dirs=("$cache_dir")
 fi
 
 pacconf_cmd=$(command -v pacman-conf || command -v pacconf)
 # shellcheck disable=2016
-host_mirrors=($($pacconf_cmd --repo extra Server 2> /dev/null | sed -r 's#(.*/)extra/os/.*#\1$repo/os/$arch#'))
-# shellcheck disable=2016
+host_mirrors=($($pacconf_cmd --conf "$pac_conf" --repo extra Server 2> /dev/null | sed -r 's#(.*/)extra/os/.*#\1$repo/os/$arch#'))
 
 # {{{ functions
 build_mount_args() {