#! /bin/sh -e
###
### Write `schroot' configuration for build chroots
###
### (c) 2018 Mark Wooding
###

###----- Licensing notice ---------------------------------------------------
###
### This file is part of the distorted.org.uk chroot maintenance tools.
###
### distorted-chroot is free software: you can redistribute it and/or
### modify it under the terms of the GNU General Public License as
### published by the Free Software Foundation; either version 2 of the
### License, or (at your option) any later version.
###
### distorted-chroot is distributed in the hope that it will be useful,
### but WITHOUT ANY WARRANTY; without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
### General Public License for more details.
###
### You should have received a copy of the GNU General Public License
### along with distorted-chroot.  If not, write to the Free Software
### Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
### USA.

. state/config.sh # @@@config@@@

## Parse the command-line.
badp=nil
while getopts "" opt; do badp=t; done
shift $(( $OPTIND - 1 ))
case $# in 0) ;; *) badp=t ;; esac
case $badp in t) echo >&2 "usage: $0"; exit 2 ;; esac

for arg in $ALL_CHROOTS; do
  case $arg in *-*-*) echo >&2 "$0: bad chroot name \`$arg'"; exit 2 ;; esac
done
if [ ! -d /dev/$VG/ ]; then echo >&2 "$0: no volume group \`$VG'"; exit 2; fi

## Start producing output.
cat <<EOF
### -*-conf-*- GENERATED by mkchrootconf
EOF
for arg in $ALL_CHROOTS; do

  ## Parse the chroot name into its compoments, and retrieve the distribution
  ## nickname list.
  dist=${arg%-*} arch=${arg#*-}
  eval "nick=\$nickmap_$dist"

  ## Start the stanza for chroot D-A.
  cat <<EOF

[$LVPREFIX$arg]
EOF

  ## Prepare the alias list.  For each nickname N for distribution D, there's
  ## a chroot alias N-A.  If A is the default architecture then there are
  ## aliases D and N for each N..  If D is the default distribution then
  ## there is an alias A.
  unset alias
  for n in $nick; do alias=${alias+$alias,}$LVPREFIX$n-$arch; done
  case $arch in
    $MYARCH) for n in $dist $nick; do alias=${alias+$alias,}$LVPREFIX$n; done ;;
  esac
  case $dist in
    $PRIMARY_DIST) alias=${alias+$alias,}$LVPREFIX$arch ;;
  esac
  case ${alias+t} in
    t)
      cat <<EOF
aliases=$alias
EOF
      ;;
  esac

  ## Architecture-specific foibles.  For `i386' and `amd64', explicitly set
  ## the personality so that `config.guess' doesn't get confused by
  ## surprising utsname(2) output.
  case $arch in
    i386)
      cat <<EOF
personality=linux32
EOF
      ;;
    amd64)
      cat <<EOF
personality=linux
EOF
      ;;
  esac

  ## The rest of the configuration.
  cat <<EOF
type=lvm-snapshot
description=Debian $dist/$arch autobuilder
device=/dev/$VG/$LVPREFIX$dist-$arch
lvm-snapshot-options=$SNAPOPT
mount-options=-onosuid,data=writeback,barrier=0,commit=3600,noatime
location=/fs
groups=root,sbuild
root-groups=root,sbuild
source-groups=root
source-root-groups=root
profile=sbuild
EOF
done

###----- That's all, folks --------------------------------------------------