A script that allows you to chroot into a failed catalyst environment to fix errors manually.

ecatalyst.sh

#!/bin/bash

# Help menu
print_help() {
cat <<-HELP

Arguments:

--spec     - --spec=stage1.spec (default)
--config   - --config=/etc/catalyst.conf (default)

HELP
exit 0
}


# Parse Command Line Arguments
while [ $# -gt 0 ]; do
  case "$1" in
    --config=*)
      # The catalyst.conf
      config="${1#*=}"
      ;;
    --spec=*)
      # The spec file i.e stage1.spec
      spec="${1#*=}"
      ;;
    --help|-h)
      print_help
      ;;
    *)
      echo "Invalid argument given!"; exit
  esac
  shift
done

main() {

# Config specific paths
config="${config:-/etc/catalyst.conf}"
storedir="$(grep storedir\= ${config} |cut -d\" -f2)"
snapshot_cache="$(grep snapshot_cache\= ${config} |cut -d\" -f2)"

# Spec specific values
spec="${spec:-stage1.spec}"
subarch="$(awk '/subarch/ {print $2}' ${spec:-stage1.spec})"
target="$(awk '/target/ {print $2}' ${spec:-stage1.spec})"
version_stamp="$(awk '/version_stamp/ {print $2}' ${spec:-stage1.spec})"
rel_type="$(awk '/rel_type/ {print $2}' ${spec:-stage1.spec})"
snapshot="$(awk '/snapshot/ {print $2}' ${spec:-stage1.spec})"
source_subpath="${target}-${subarch}-${version_stamp}"

if ! [ -d "${snapshot_cache}/${snapshot}" ]; then
  echo "Snapshot directory ${snapshot} is invalid!"
  exit
fi

echo "Entering ${subarch} FAILDebug Catalyst Chroot"

# Mount filesystems
mount -t proc none ${storedir}/tmp/${rel_type}/${source_subpath}/proc
mount -o bind /dev ${storedir}/tmp/${rel_type}/${source_subpath}/dev
mount -t tmpfs shm ${storedir}/tmp/${rel_type}/${source_subpath}/dev/shm
mount -t sysfs none ${storedir}/tmp/${rel_type}/${source_subpath}/sys

# Check to see we have a /usr/portage directory
if ! [ -d ${storedir}/tmp/${rel_type}/${source_subpath}/usr/portage ]; then
  mkdir -p ${storedir}/tmp/${rel_type}/${source_subpath}/usr/portage
fi

# bind /usr/portage/*
mount -o bind ${snapshot_cache}/${snapshot}/portage \
${storedir}/tmp/${rel_type}/${source_subpath}/usr/portage
mount -o bind ${storedir}/packages/${rel_type}/${source_subpath} \
${storedir}/tmp/${rel_type}/${source_subpath}/usr/portage/packages

# Start chroot
if [ ${subarch} = amd64 ]; then
  linux64 chroot ${storedir}/tmp/${rel_type}/${source_subpath} /bin/bash
else
  linux32 chroot ${storedir}/tmp/${rel_type}/${source_subpath} /bin/bash
fi

echo "Exiting ECatalyst Chroot!"
echo "Umount packages"
umount ${storedir}/tmp/${rel_type}/${source_subpath}/usr/portage/packages

echo "Umounting syfs,proc,dev,dev/shm & usr/portage"
umount ${storedir}/tmp/${rel_type}/${source_subpath}/{dev/shm,dev,sys,proc,usr/portage}
echo "All done!"
}

main