lib/scripts/getsettings

more uniform handling of ISABELLE_HOME_USER component;
discontinued ISABELLE_IGNORE_USER_SETTINGS (ever used? cf. c567f9fd61a2);

# -*- shell-script -*- :mode=shellscript:
#
# Author: Markus Wenzel, TU Muenchen
#
# getsettings - bash source script to augment current env.

if [ -z "$ISABELLE_SETTINGS_PRESENT" ]
then

set -o allexport

ISABELLE_SETTINGS_PRESENT=true

export ISABELLE_HOME
if { echo -n "$ISABELLE_HOME" | fgrep " " >/dev/null; }
then
  echo 1>&2 "### White space in ISABELLE_HOME may cause strange problems later on!"
  echo 1>&2 "### ISABELLE_HOME=\"$ISABELLE_HOME\""
fi

#key executables
ISABELLE_PROCESS="$ISABELLE_HOME/bin/isabelle-process"
ISABELLE_TOOL="$ISABELLE_HOME/bin/isabelle"
#legacy settings
ISABELLE="$ISABELLE_PROCESS"
ISATOOL="$ISABELLE_TOOL"

#Isabelle distribution identifier -- filled in automatically!
ISABELLE_IDENTIFIER=""

#users tend to put strange things in here ...
unset ENV
unset BASH_ENV

#support easy settings
function choosefrom ()
{
  local RESULT=""
  local FILE=""

  for FILE in "$@"
  do
    [ -z "$RESULT" -a -e "$FILE" ] && RESULT="$FILE"
  done

  [ -z "$RESULT" ] && RESULT="$FILE"
  echo "$RESULT"
}

#JVM path wrapper
if [ "$OSTYPE" = cygwin ]; then
  CLASSPATH="$(cygpath -u -p "$CLASSPATH")"
  function jvmpath() { cygpath -w -p "$@"; }
else
  function jvmpath() { echo "$@"; }
fi
HOME_JVM="$HOME"

#CLASSPATH convenience
function classpath () {
  for X in "$@"
  do
    if [ -z "$CLASSPATH" ]; then
      CLASSPATH="$X"
    else
      CLASSPATH="$CLASSPATH:$X"
    fi
  done
}

#nested components
ISABELLE_COMPONENTS=""
function init_component ()
{
  local COMPONENT="$1"

  if [ ! -d "$COMPONENT" ]; then
    echo >&2 "Bad Isabelle component: $COMPONENT"
    exit 2
  elif [ -z "$ISABELLE_COMPONENTS" ]; then
    ISABELLE_COMPONENTS="$COMPONENT"
  else
    ISABELLE_COMPONENTS="$ISABELLE_COMPONENTS:$COMPONENT"
  fi
  if [ -f "$COMPONENT/etc/settings" ]; then
    source "$COMPONENT/etc/settings" || exit 2
  fi
  if [ -f "$COMPONENT/etc/components" ]; then
    {
      while read; do
        case "$REPLY" in
          \#* | "") ;;
          /*) init_component "$REPLY" ;;
          *) init_component "$COMPONENT/$REPLY" ;;
        esac
      done
    } < "$COMPONENT/etc/components"
  fi
}

#main components
init_component "$ISABELLE_HOME"

[ "$ISABELLE_HOME" -ef "$ISABELLE_HOME_USER" ] && \
  { echo >&2 "### ISABELLE_HOME and ISABELLE_HOME_USER must not be the same directory!"; }
[ -d "$ISABELLE_HOME_USER" ] && init_component "$ISABELLE_HOME_USER"

#ML system identifier
if [ -z "$ML_PLATFORM" ]; then
  ML_IDENTIFIER="$ML_SYSTEM"
else
  ML_IDENTIFIER="${ML_SYSTEM}_${ML_PLATFORM}"
fi

ISABELLE_OUTPUT="$ISABELLE_OUTPUT/$ML_IDENTIFIER"

set +o allexport

fi