krebs 4 infest: add arch-infest and refactor

krebs/4lib/infest/finalize.sh

@@ -1,21 +1,30 @@
 #! /bin/sh
 set -eux
 {
-  umount /mnt/nix || [ $? -eq 32 ]
-  umount /mnt/boot || [ $? -eq 32 ]
-  umount /mnt/root || [ $? -eq 32 ]
-  umount /mnt || [ $? -eq 32 ]
-  umount /boot || [ $? -eq 32 ]
+  umount /mnt/nix
+  umount /mnt/root
+  umount /boot || :
+  umount /mnt/boot
+  umount /mnt
+
+  coreutils_path=$(set +f; for i in /nix/store/*coreutils*/bin; do :; done; echo $i)
+  sed_path=$(set +f; for i in /nix/store/*gnused*/bin; do :; done; echo $i)
+  PATH="$coreutils_path:$sed_path"
 
-  PATH=$(set +f; for i in /nix/store/*coreutils*/bin; do :; done; echo $i)
   export PATH
 
   mkdir /oldshit
 
+  #fix bug where grub install cant find the /nix/store because its under a bind mount
+  if test -e /boot/grub/grub.cfg; then
+    sed -i 's,//store,/nix/store,g' /boot/grub/grub.cfg
+  fi;
+
   mv /bin /oldshit/
   mv /newshit/bin /
 
   # TODO ensure /boot is empty
+  # skip boot
   rmdir /newshit/boot
 
   # skip /dev

krebs/4lib/infest/install-nix.sh

@@ -19,16 +19,9 @@ install_nix() {(
     )
     nix_src_dir=$(basename $nix_url .tar.bz2)
     tar jxf $nix_src_dir.tar.bz2
-    mkdir -v -m 0755 -p /nix
     $nix_src_dir/install
   fi
 
-  #TODO: make this general or move to prepare
-  if ! mount | grep -Fq '/dev/mapper/centos-root on /mnt/nix type xfs'; then
-    mkdir -p /mnt/nix
-    mount --bind /nix /mnt/nix
-  fi
-
   . /root/.nix-profile/etc/profile.d/nix.sh
 
   for i in \

krebs/4lib/infest/prepare.sh

@@ -5,10 +5,14 @@ prepare() {(
   if test -e /etc/os-release; then
     . /etc/os-release
     case $ID in
+      arch)
+        prepare_arch "$@"
+        exit
+        ;;
       centos)
         case $VERSION_ID in
           7)
-            prepare_centos7 "$@"
+            prepare_centos "$@"
             exit
             ;;
         esac
@@ -19,17 +23,28 @@ prepare() {(
   exit -1
 )}
 
-prepare_centos7() {
+prepare_arch() {
+  type bzip2 2>/dev/null || pacman -S --noconfirm bzip2
+  type git   2>/dev/null || pacman -S --noconfirm git
+  type rsync 2>/dev/null || pacman -S --noconfirm rsync
+  prepare_common
+}
+
+prepare_centos() {
   type bzip2 2>/dev/null || yum install -y bzip2
   type git   2>/dev/null || yum install -y git
   type rsync 2>/dev/null || yum install -y rsync
+  prepare_common
+}
+
+prepare_common() {
+
   if ! getent group nixbld >/dev/null; then
     groupadd -g 30000 -r nixbld
   fi
   for i in `seq 1 10`; do
     if ! getent passwd nixbld$i 2>/dev/null; then
       useradd \
-        -c "CentOS Nix build user $i" \
         -d /var/empty \
         -g 30000 \
         -G 30000 \
@@ -38,7 +53,6 @@ prepare_centos7() {
         -s /sbin/nologin \
         -u $(expr 30000 + $i) \
         nixbld$i
-      rm -f /var/spool/mail/nixbld$i
     fi
   done
 
@@ -46,29 +60,46 @@ prepare_centos7() {
   # mount install directory
   #
 
-  if ! mount | grep -Fq '/dev/mapper/centos-root on /mnt type xfs'; then
+  if ! mount | grep -Fq ' on /mnt type '; then
     mkdir -p /newshit
     mount --bind /newshit /mnt
   fi
 
-  if ! mount | grep -Fq '/dev/sda1 on /mnt/boot type xfs'; then
+  if ! mount | grep -Fq ' on /mnt/boot type '; then
     mkdir -p /mnt/boot
-    mount /dev/sda1 /mnt/boot
+
+    if mount | grep -Fq ' on /boot type '; then
+      bootdev=$(mount | grep " on /boot type " | sed 's/ .*//')
+      mount $bootdev /mnt/boot
+    else
+      mount --bind /boot/ /mnt/boot
     fi
 
-  mount | grep 'on /mnt\>' >&2
+  fi
 
   #
   # prepare install directory
   #
 
+  rootpart=$(mount | grep " on / type" | sed 's/ .*//')
+
   mkdir -p /mnt/etc/nixos
   mkdir -m 0555 -p /mnt/var/empty
 
-  if ! mount | grep -Fq '/dev/mapper/centos-root on /mnt/root type xfs'; then
+  if ! mount | grep -Fq "$rootpart on /mnt/root type "; then
     mkdir -p /mnt/root
     mount --bind /root /mnt/root
   fi
+
+  #
+  # prepare nix store path
+  #
+
+  mkdir -v -m 0755 -p /nix
+  if ! mount | grep -Fq "$rootpart on /mnt/nix type "; then
+    mkdir -p /mnt/nix
+    mount --bind /nix /mnt/nix
+  fi
 }
 
 prepare "$@"