bin/live-set-selections

   1 #!/bin/sh
   2 # Cloned-and-hacked from preseed/debconf-set-selections for live-initramfs.
   3 set -e
   4
   5 OLDIFS="$IFS"
   6 CR=$(echo -en "\r")
   7 NL="
   8 "
   9
  10 . /scripts/live-functions
  11 load_confmodule
  12
  13 # Returns the first field in the current line
  14 first_field() {
  15         echo "$line" | grep -q "[[:space:]]" || return 1
  16         echo "$line" | sed -r 's/^([^[:space:]]*).*/\1/'
  17 }
  18
  19 # Returns any fields after the first field in the current line
  20 rest_line() {
  21         if echo "$line" | grep -q "[[:space:]]"; then
  22                 echo "$line" | sed 's/^[^[:space:]]*[[:space:]]*//'
  23         fi
  24 }
  25
  26 SEEN=1
  27 if [ "$1" = --unseen ]; then
  28         SEEN=
  29         shift
  30 fi
  31
  32 file="$1"
  33
  34 parse_error() {
  35         echo "Error parsing preconfiguration file: $*" >&2
  36         exit 1
  37 }
  38
  39 IFS="$NL"
  40 multiline=""
  41 # TODO: this squashes \r elsewhere in the line too
  42 for line in $(grep -v '^#\|^[[:space:]]*$' "$file" | sed "s/$CR//g"); do
  43         IFS="$OLDIFS"
  44
  45         line="$(echo "$line" | sed 's/^[[:space:]]*//')"
  46         if echo "$line" | grep -q '\\$'; then
  47                 multiline="${multiline:+$multiline }$(echo "$line" | \
  48                         sed 's/[[:space:]]*\\$//')"
  49                 continue
  50         elif [ -n "$multiline" ]; then
  51                 line="$multiline $line"
  52                 multiline=""
  53         fi
  54
  55         package=""
  56         var=""
  57         type=""
  58         val=""
  59         if ! package="$(first_field)"; then
  60                 parse_error "Syntax error: unable to determine template owner"
  61         fi
  62         line="$(rest_line)"
  63         if ! var="$(first_field)"; then
  64                 parse_error "Syntax error: unable to determine template name"
  65         fi
  66         line="$(rest_line)"
  67         if ! type="$(first_field)"; then
  68                 # Allow for lines without separator before an empty value
  69                 if [ "$line" ]; then
  70                         type="$line"
  71                 else
  72                         parse_error "Syntax error: unable to determine template type"
  73                 fi
  74         fi
  75         line="$(rest_line)"
  76         val="$line"
  77
  78         if [ "$type" = seen ]; then
  79                 # Set seen flag.
  80                 db_fset "$var" "$type" "$val" || true # how to handle this error?
  81         else
  82                 if ! db_set "$var" "$val"; then
  83                         # Question does not exist yet.
  84                         db_register debian-installer/dummy "$var"
  85                         db_set "$var" "$val"
  86                         db_subst "$var" ID "$var"
  87                 fi
  88                 if [ "$SEEN" ]; then
  89                         db_fset "$var" seen true
  90                 fi
  91         fi
  92 done