cloud-init 0.6.3-0ubuntu1 / postinst

#!/bin/sh -e

. /usr/share/debconf/confmodule

set -f # disable pathname expansion
db_capb escape # to support carriage return / multi-line values

update_cfg() {
   # takes filename, header, new object (in yaml), optionally 'remover'
   # and merges new into existing object in filename, and then updates file
   # remover a string that means "delete existing entry"
   python -c '
import sys, yaml

def update(src, cand):
    if not (isinstance(src, dict) and isinstance(cand, dict)):
        return cand
    for k, v in cand.iteritems():
        # if the candidate has _ as value, delete source
        if v == REMOVER:
            if k in src:
                del src[k]
            continue
        if k not in src:
            src[k] = v
        else:
            src[k] = update(src[k], v)
    return src

(fname, header, newyaml) = sys.argv[1:4]
REMOVER = object
if len(sys.argv) == 5:
   REMOVER = sys.argv[4]
newcfg = yaml.load(newyaml)

with open(fname, "r") as fp:
    cfg = yaml.load(fp)
if not cfg: cfg = {}

cfg = update(cfg, newcfg)

with open(fname, "w") as fp:
    fp.write(header + "\n")
    fp.write(yaml.dump(cfg))' "$@"
}

handle_preseed_maas() {
   local cfg_file="/etc/cloud/cloud.cfg.d/90_dpkg_maas.cfg"
   local md_url="" creds_all="" c_key="" t_key="" t_sec="" c_sec="";

   db_get "cloud-init/maas-metadata-url" && md_url="$RET" || :
   db_get "cloud-init/maas-metadata-credentials" && creds_all="$RET" || :

   # nothing to do
   [ -n "$md_url" -o -n "$creds_all" ] || return 0

   # change a url query string format into : delimited
   if [ -n "$creds_all" -a "${creds_all#*&}" != "${creds_all}" ]; then
      creds_all=$(python -c 'from urlparse import parse_qs; import sys;
keys = parse_qs(sys.argv[1])
for k in sys.argv[2:]:
   sys.stdout.write("%s:" % keys.get(k,[""])[0])' "$creds_all" \
   oauth_consumer_key oauth_token_key oauth_token_secret
)
   fi

   # now, if non-empty creds_all is: consumer_key:token_key:token_secret
   if [ -n "$creds_all" ]; then
      OIFS="$IFS"; IFS=:; set -- $creds_all; IFS="$OIFS"
      c_key=$1; t_key=$2; t_sec=$3
   fi

   if [ "$md_url" = "_" -a "${c_key}:${t_key}:${t_sec}" = "_:_:_" ]; then
      # if all these values were '_', the delete value, just delete the file.
      rm -f "$cfg_file"
   else
      local header="# written by cloud-init debian package per preseed entries
# cloud-init/{maas-metadata-url,/maas-metadata-credentials}"

      local pair="" k="" v="" pload="" orig_umask=""
      for pair in "metadata_url:$md_url" "consumer_key:${c_key}" \
         "token_key:${t_key}" "token_secret:$t_sec"; do
         k=${pair%%:*}
         v=${pair#${k}:}
         [ -n "$v" ] && pload="${pload} $k: \"$v\","
      done

      # '_' would indicate "delete", otherwise, existing entries are left
      orig_umask=$(umask)
      umask 066
      : >> "$cfg_file" && chmod 600 "$cfg_file"
      update_cfg "$cfg_file" "$header" "datasource: { MAAS: { ${pload%,} } }" _
      umask ${orig_umask}
   fi

   # now clear the database of the values, as they've been consumed
   db_unregister "cloud-init/maas-metadata-url" || :
   db_unregister "cloud-init/maas-metadata-credentials" || :
}

handle_preseed_local_cloud_config() {
   local ccfg="" debconf_name="cloud-init/local-cloud-config"
   local cfg_file="/etc/cloud/cloud.cfg.d/90_dpkg_local_cloud_config.cfg"
   local header="# written by cloud-init debian package per preseed entry
# $debconf_name"

   db_get "${debconf_name}" && ccfg="$RET" || :

   if [ "$ccfg" = "_" ]; then
      rm -f "$cfg_file"
   elif [ -n "$ccfg" ]; then
      { echo "$header"; echo "$ccfg"; } > "$cfg_file"
   fi
   db_unregister "${debconf_name}" || :
}

if [ "$1" = "configure" ]; then
   # disable ureadahead (LP: #499520)
   dpkg-divert --package cloud-init --rename --divert \
      /etc/init/ureadahead.conf.disabled --add /etc/init/ureadahead.conf
   if db_get cloud-init/datasources; then
      values="$RET"
      if [ "${values#*MaaS}" != "${values}" ]; then
         # if db had old MAAS spelling, fix it.
         values=$(echo "$values" | sed 's,MaaS,MAAS,g')
         db_set cloud-init/datasources "$values"
      fi
      cat > /etc/cloud/cloud.cfg.d/90_dpkg.cfg <<EOF
# to update this file, run dpkg-reconfigure cloud-init
datasource_list: [ $values ]
EOF
   fi

   # we want to affect apt_pipelining on install, not wait for
   # cloud-init to run it on next boot.
   pipeline_f="/etc/apt/apt.conf.d/90cloud-init-pipelining"
   if [ -f /var/lib/cloud/instance/obj.pkl ]; then
      cloud-init-cfg apt-pipelining once-per-instance >/dev/null 2>&1 ||
         echo "Warning: failed to setup apt-pipelining" 1>&2
   elif [ ! -f "$pipeline_f" ]; then
      # there was no cloud available, so populate it ourselves.
      cat > "$pipeline_f" <<EOF
//Written by cloud-init per 'apt_pipelining'
Acquire::http::Pipeline-Depth "0";
EOF
   fi

   # if there are maas settings pre-seeded apply them
   handle_preseed_maas

   # if there is generic cloud-config preseed, apply them
   handle_preseed_local_cloud_config
fi


# Automatically added by dh_python2:
if which pycompile >/dev/null 2>&1; then
	pycompile -p cloud-init 
fi

# End automatically added section