abchr

   1 #!/bin/sh
   2 [ "$(id | awk '{print $1}')" != 'uid=0(root)' ] && exec sudo "$0" "$@"
   3
   4 dir="$(realpath "$(dirname "$0")/../alpine")"
   5 aports="$(realpath "$dir/../aports")"
   6 if [ $# -gt 0 ]; then
   7         cmd="$@"
   8 else
   9         cmd='/bin/ash -i'
  10 fi
  11
  12 um=0
  13 uma() {
  14         : $((++um))
  15         eval "um$um='$1'"
  16 }
  17 m() {
  18         src="$1"; shift
  19         dst="$1"; shift
  20         mkdir -p "$dst"
  21         mount $@ "$src" "$dst"
  22         uma "$dst"
  23 }
  24 mb() {
  25         src="$1"; shift
  26         if [ $# -gt 0 -a "x$(echo "$1" | cut -c 1)" = x/ ]; then
  27                 dst="$dir$1"; shift
  28         else
  29                 dst="$dir$src"
  30         fi
  31         src="$(realpath $src)"
  32         [ ! -e "$src" ] && return
  33         m "$src" "$dst" --bind --slave $@
  34 }
  35
  36 mb /dev -oro
  37 mb /dev/pts
  38 mb /dev/shm
  39 mb /dev/mqueue
  40 m none "$dir/proc" -t proc
  41 mb /sys
  42 ln -f /etc/resolv.conf "$dir/etc/resolv.conf"
  43 mb "$aports" /home/abuild/aports
  44 mb /srv/alpine/edge /home/abuild/packages
  45 mb /var/cache/distfiles
  46 mb /etc/apk/cache
  47
  48 f="$(chroot "$dir" mktemp -p/tmp/)"
  49
  50 chrdir="$PWD/"
  51 chrdir="${chrdir%/aports/*}"
  52 if [ "$chrdir" != "$PWD/" ]; then
  53         cmd="cd \"/home/abuild${PWD#$chrdir}\" && $cmd"
  54 fi
  55
  56 echo "$cmd" | tee "$dir/$f"
  57 chmod ugo+r "$dir/$f"
  58 chroot "$dir" /bin/su abuild -l "$f"
  59
  60 rm -f "$dir/$f"
  61
  62 for x in $(seq $um -1 1); do
  63         eval "umount \$um$x"
  64 done