nixos/modules/system/boot/loader/init-script/init-script-builder.sh

   1 #! @bash@/bin/sh -e
   2
   3 shopt -s nullglob
   4
   5 export PATH=/empty
   6 for i in @path@; do PATH=$PATH:$i/bin; done
   7
   8 if test $# -ne 1; then
   9     echo "Usage: init-script-builder.sh DEFAULT-CONFIG"
  10     exit 1
  11 fi
  12
  13 defaultConfig="$1"
  14
  15
  16 [ "$(stat -f -c '%i' /)" = "$(stat -f -c '%i' /boot)" ] || {
  17   # see grub-menu-builder.sh
  18   echo "WARNING: /boot being on a different filesystem not supported by init-script-builder.sh"
  19 }
  20
  21
  22
  23 target="/sbin/init"
  24 targetOther="/boot/init-other-configurations-contents.txt"
  25
  26 tmp="$target.tmp"
  27 tmpOther="$targetOther.tmp"
  28
  29
  30 configurationCounter=0
  31 numAlienEntries=`cat <<EOF | egrep '^[[:space:]]*title' | wc -l
  32 @extraEntries@
  33 EOF`
  34
  35
  36
  37
  38 # Add an entry to $targetOther
  39 addEntry() {
  40     local name="$1"
  41     local path="$2"
  42     local shortSuffix="$3"
  43
  44     configurationCounter=$((configurationCounter + 1))
  45
  46     local stage2=$path/init
  47
  48     content="$(
  49       echo "#!/bin/sh"
  50       echo "# $name"
  51       echo "# created by init-script-builder.sh"
  52       echo "exec $stage2"
  53     )"
  54
  55     [ "$path" != "$defaultConfig" ] || {
  56       echo "$content" > $tmp
  57       echo "# older configurations: $targetOther" >> $tmp
  58       chmod +x $tmp
  59     }
  60
  61     echo -e "$content\n\n" >> $tmpOther
  62 }
  63
  64
  65 mkdir -p /boot /sbin
  66
  67 addEntry "@distroName@ - Default" $defaultConfig ""
  68
  69 # Add all generations of the system profile to the menu, in reverse
  70 # (most recent to least recent) order.
  71 for link in $((ls -d $defaultConfig/specialisation/* ) | sort -n); do
  72     date=$(stat --printf="%y\n" $link | sed 's/\..*//')
  73     addEntry "@distroName@ - variation" $link ""
  74 done
  75
  76 for generation in $(
  77     (cd /nix/var/nix/profiles && ls -d system-*-link) \
  78     | sed 's/system-\([0-9]\+\)-link/\1/' \
  79     | sort -n -r); do
  80     link=/nix/var/nix/profiles/system-$generation-link
  81     date=$(stat --printf="%y\n" $link | sed 's/\..*//')
  82     if [ -d $link/kernel ]; then
  83       kernelVersion=$(cd $(dirname $(readlink -f $link/kernel))/lib/modules && echo *)
  84       suffix="($date - $kernelVersion)"
  85     else
  86       suffix="($date)"
  87     fi
  88     addEntry "@distroName@ - Configuration $generation $suffix" $link "$generation ($date)"
  89 done
  90
  91 mv $tmpOther $targetOther
  92 mv $tmp $target