#!/bin/sh
##############################################################################
# __ #
# ________ ___ / / ___ Scala Tools Launch Script #
# / __/ __// _ | / / / _ | (c) 2002-2003, LAMP/EPFL #
# __\ \/ /__/ __ |/ /__/ __ | #
# /____/\___/_/ |_/____/_/ | | #
# |/ #
##############################################################################
# $Id$
##############################################################################
# Configuration
# The configure function contains all the configurable variables of
# this script. Each of these variables may be overridden by defining
# an environment variable with the same but where the "default_" has
# been replaced by "SCALA_". For example, to start scalaint with a big
# initial heap size, one may run the following command:
#
# env SCALA_SCALA_ARGS=-Xms1024m scalaint".
#
# These variables must use the Unix form for paths and path lists
# (i.e. use '/' as file separator and ':' as path separator). There
# are two exceptions: JAVA_ARGS and SCALA_ARGS which must use the
# paltform-specific form.
#
# The following environment variables are also read by this script:
#
# - SCALA_CLASSPATH: if defined, it is used as the default classpath
# by all Scala tools.
#
# - CLASSPATH: if defined and SCALA_CLASSPATH is undefined, it is used
# as the default classpath by all Scala tools.
#
# - SCALA_SOURCEPATH: if defined, it is used as the default sourcepath
# by all Scala tools.
#
# - SCALA_BOOTCLASSPATH: if defined, it is used as the default
# bootclasspath by all Scala tools.
#
# - SCALA_EXTDIRS: if defined, it is used as the default extdirs by
# all Scala tools.
#
# These variables must use the platform-specific form for paths and
# path lists.
configure() {
# Location of the Scala library sources.
default_LIBRARY_SOURCES={#LIBRARY_SOURCES#};
# Location of the Scala library.
default_LIBRARY_CLASSES={#LIBRARY_CLASSES#};
# Location of the Scala tools library.
default_TOOLS_CLASSES={#TOOLS_CLASSES#};
# Location of the FJBG library.
default_FJBG_CLASSES={#FJBG_CLASSES#};
# Location of the MSIL library.
default_MSIL_CLASSES={#MSIL_CLASSES#};
# Command to start the Java VM.
default_JAVA_CMD={#JAVA_CMD#};
# Additional arguments to pass to the Java VM.
default_JAVA_ARGS={#JAVA_ARGS#};
# Command to start the Scala VM.
default_SCALA_CMD={#SCALA_CMD#};
# Additional arguments to pass to the Scala VM.
default_SCALA_ARGS={#SCALA_ARGS#};
# Command to start subprocesses. This is mainly for debugging
# purposes. For example, one may display the Java command that is
# started by "scala", by running "env SCALA_EXEC=echo scala".
default_EXEC="exec";
}
##############################################################################
# Error functions
# Prints a warning message on stderr.
warning() {
echo "$0: warning:" "$@" 1>&2;
}
# Prints an error message on stderr.
error() {
echo "$0:" "$@" 1>&2;
}
# Prints an error message on stderr and exits with a non-zero status.
abort() {
error "$@";
exit 1;
}
##############################################################################
# File name and path list conversion functions
# Prints the OS-specific form of the specified Unix form file name.
get_os_filename() {
[ $# = 1 ] || abort "internal error";
case "$UNAME" in
CYGWIN* ) cygpath --windows "$1";;
* ) echo "$@";;
esac;
}
# Prints the Unix form of the specified OS-specific form file name.
get_unix_filename() {
[ $# = 1 ] || abort "internal error";
case "$UNAME" in
CYGWIN* ) cygpath --unix "$1";;
* ) echo "$@";;
esac;
}
# Prints the OS-specific form of the specified Unix form path list.
get_os_pathlist() {
[ $# = 1 ] || abort "internal error";
case "$UNAME" in
CYGWIN* ) cygpath --window --path "$1";;
* ) echo "$@";;
esac;
}
# Prints the Unix form of the specified OS-specific form path list.
get_unix_pathlist() {
[ $# = 1 ] || abort "internal error";
case "$UNAME" in
CYGWIN* ) cygpath --unix --path "$1";;
* ) echo "$@";;
esac;
}
##############################################################################
# Path list construction functions
# Prints the concatenation of two path lists.
append_pathlists() {
[ $# = 2 ] || abort "internal error";
if [ -z "$1" ]; then
echo "$2";
elif [ -z "$2" ]; then
echo "$1";
else
echo "$1:$2";
fi;
}
##############################################################################
# Value computation functions
# Computes and stores the value "$1" in the variable "current_$1". If
# the variable "SCALA_$1" is defined, its content is used. Otherwise,
# the content of the variable "default_$1" is used.
compute_value() {
[ $# = 1 ] || abort "internal error";
eval current_$1=\"\$default_$1\";
case "$1" in
LIBRARY_SOURCES | \
LIBRARY_CLASSES | \
TOOLS_CLASSES | \
FJBG_CLASSES | \
MSIL_CLASSES )
if eval [ -n \"\$SCALA_$1\" ]; then
if eval [ -f \"\$SCALA_$1\" -o -d \"\$SCALA_$1\" ]; then
eval current_$1=\"\$SCALA_$1\";
else
eval warning \""File referred by SCALA_$1 (\$SCALA_$1)" \
"does not exist, using default value instead."\";
unset SCALA_$1;
fi;
fi;
if ! eval [ -f \"\$current_$1\" -o -d \"\$current_$1\" ]; then
eval abort \""File referred by default_$1 (\$default_$1)" \
"does not exist. Please, fix definition of default_$1 in" \
"file $SOURCE or define environment variable SCALA_$1."\";
fi;
;;
JAVA_CMD | \
JAVA_ARGS | \
SCALA_CMD | \
SCALA_ARGS | \
EXEC )
if eval [ -n \"\$SCALA_$1\" ]; then
eval current_$1=\"\$SCALA_$1\";
fi;
;;
* )
abort "internal error: $1";
;;
esac;
}
##############################################################################
# Default paths
# Prints the default scala classpath or nothing if it's unspecified.
get_scala_classpath() {
if [ -n "$SCALA_CLASSPATH" ]; then
get_unix_pathlist "$SCALA_CLASSPATH";
elif [ -n "$CLASSPATH" ]; then
get_unix_pathlist "$CLASSPATH";
fi;
}
# Prints the default scala sourcepath or nothing if it's unspecified.
get_scala_sourcepath() {
if [ -n "$SCALA_SOURCEPATH" ]; then
get_unix_pathlist "$SCALA_SOURCEPATH";
fi;
}
# Prints the default scala bootclasspath or nothing if it's unspecified.
get_scala_bootclasspath() {
if [ -n "$SCALA_BOOTCLASSPATH" ]; then
get_unix_pathlist "$SCALA_BOOTCLASSPATH";
fi;
}
# Prints the default scala extdirs or nothing if it's unspecified.
get_scala_extdirs() {
if [ -n "$SCALA_EXTDIRS" ]; then
get_unix_pathlist "$SCALA_EXTDIRS";
fi;
}
##############################################################################
# VM invocation functions
# Prints the VM script-suffix-specific arguments.
vm_get_script_suffix_args() {
case "$SCRIPT" in
*-debug* ) echo "-Djava.compiler=NONE -ea";;
esac;
}
# Starts a Java VM with the specified arguments.
vm_start_java() {
# compute values
compute_value EXEC;
compute_value JAVA_CMD;
compute_value JAVA_ARGS;
# start Java VM
$current_EXEC $current_JAVA_CMD $current_JAVA_ARGS \
`vm_get_script_suffix_args` "$@";
}
# Starts a Scala VM with the specified arguments.
vm_start_scala() {
# compute values
compute_value EXEC;
compute_value SCALA_CMD;
compute_value SCALA_ARGS;
# start Java VM
$current_EXEC $current_SCALA_CMD $current_SCALA_ARGS \
`vm_get_script_suffix_args` "$@";
}
##############################################################################
# Scala invocation functions
# Returns true if the given arguments contain a flag -Xbootclasspath.
scala_has_bootclasspath() {
while [ $# != 0 ]; do
case "$1" in
-Xbootclasspath:* ) return 0;;
-cp | -classpath ) shift 2;;
-jar ) return 1;;
-* ) shift 1;;
* ) return 1;;
esac;
done;
return 1;
}
# Implements the command "scala".
scala() {
if scala_has_bootclasspath "$@"; then
vm_start_java "$@";
else
compute_value LIBRARY_CLASSES;
classes="$current_LIBRARY_CLASSES";
vm_start_java "-Xbootclasspath/a:`get_os_filename "$classes"`" "$@";
fi;
}
##############################################################################
# Tool invocation functions
# Starts a Scala tool. The first argument is added to the runtime
# classpath. The following ones are passed to vm_start_scala. They
# must, at least, contain the name of the main class.
tool_start() {
[ $# -gt 1 ] || abort "internal error";
classpath="$1"; shift 1;
# compute value
compute_value LIBRARY_SOURCES;
compute_value LIBRARY_CLASSES;
compute_value TOOLS_CLASSES;
# append tools library to classpath
classpath=`append_pathlists "$classpath" "$current_TOOLS_CLASSES"`;
# start Scala VM
tool_start0 -classpath "`get_os_pathlist "$classpath"`" "$@";
}
tool_start0() {
if [ -n "`get_scala_extdirs`" ]; then
tool_start1 -Dscala.ext.dirs="`get_scala_extdirs`" "$@";
else
tool_start1 "$@";
fi;
}
tool_start1() {
if [ -n "`get_scala_bootclasspath`" ]; then
tool_start2 -Dscala.boot.class.path="`get_scala_bootclasspath`" "$@";
else
tool_start2 "$@";
fi;
}
tool_start2() {
if [ -n "`get_scala_sourcepath`" ]; then
tool_start3 -Dscala.source.path="`get_scala_sourcepath`" "$@";
else
tool_start3 "$@";
fi;
}
tool_start3() {
if [ -n "`get_scala_classpath`" ]; then
tool_start4 -Dscala.class.path="`get_scala_classpath`" "$@";
else
tool_start4 "$@";
fi;
}
tool_start4() {
sources="$current_LIBRARY_SOURCES";
classes="$current_LIBRARY_CLASSES";
vm_start_scala \
-Dscala.product="$SCRIPT" \
-Dscala.version="$VERSION" \
-Dscala.home="$PREFIX" \
-Dscala.library.source.path="`get_os_filename "$sources"`" \
-Dscala.library.class.path="`get_os_filename "$classes"`" \
"$@";
}
##############################################################################
# Compiler invocation functions
# Starts a Scala compiler. The first argument is added to the runtime
# classpath. The following ones are passed to vm_start_scala. They
# must, at least, contain the name of the main class.
compiler_start() {
[ $# -gt 1 ] || abort "internal error";
classpath="$1"; shift 1;
# compute values
compute_value FJBG_CLASSES;
compute_value MSIL_CLASSES;
# append FJBG and MSIL libraries to classpath
classpath=`append_pathlists "$classpath" "$current_FJBG_CLASSES"`;
classpath=`append_pathlists "$classpath" "$current_MSIL_CLASSES"`;
# start tool
tool_start "$classpath" "$@";
}
##############################################################################
# Implementation of scala-info
# Prints given error message, prints usage and exits with error code 1.
info_abort() {
error "$@";
info_print_usage 1>&2;
exit 1;
}
# Prints value of variable $1.
info_print_variable() {
[ $# = 1 ] || abort "internal error";
eval echo \"\$$1\";
}
# Prints default value of value $1.
info_print_default_value() {
[ $# = 1 ] || abort "internal error";
info_print_variable "default_$1";
}
# Prints current value of value $1.
info_print_current_value() {
[ $# = 1 ] || abort "internal error";
compute_value "$1";
info_print_variable "current_$1";
}
# Implements "scala-info --home".
info_option_home() {
[ $# -gt 0 ] && abort "too many arguments";
echo "$PREFIX";
}
# Implements "scala-info --version".
info_option_version() {
[ $# -gt 0 ] && abort "too many arguments";
echo "$VERSION";
}
# Implements "scala-info --$1 <value>"
info_option_x_value() {
[ $# -lt 2 ] && abort "missing value name";
[ $# -gt 2 ] && abort "too many arguments";
case "$2" in
LIBRARY_SOURCES ) value=$2;;
LIBRARY_CLASSES ) value=$2;;
TOOLS_CLASSES ) value=$2;;
FJBG_CLASSES ) value=$2;;
MSIL_CLASSES ) value=$2;;
JAVA_CMD ) value=$2;;
JAVA_ARGS ) value=$2;;
SCALA_CMD ) value=$2;;
SCALA_ARGS ) value=$2;;
EXEC ) value=$2;;
* ) abort "Unknown value \`$2'";;
esac;
info_print_$1_value $value;
}
# Implements "scala-info --help".
info_option_help() {
echo "usage: $0 <option>";
echo "where possible options include:";
echo " --home Print Scala home directory";
echo " --version Print Scala version";
echo " --default <name> Print default value of value <name>";
echo " --current <name> Print current value of value <name>";
echo " -? --help Print this help message";
echo "";
echo "valid value names include:";
echo " LIBRARY_SOURCES Location of the Scala library sources";
echo " LIBRARY_CLASSES Location of the Scala library";
echo " TOOLS_CLASSES Location of the Scala tools";
echo " FJBG_CLASSES Location of the fjbg library";
echo " MSIL_CLASSES Location of the msil library";
echo " JAVA_CMD Command to start the Java VM";
echo " JAVA_ARGS Additional arguments to pass to the Java VM";
echo " SCALA_CMD Command to start the Scala VM";
echo " SCALA_ARGS Additional arguments to pass to the Scala VM";
echo " EXEC Command to start subprocesses";
}
# Entry point of scala-info.
info() {
[ $# = 0 ] && abort "missing option";
case "$1" in
--home ) shift 1; info_option_home "$@";;
--version ) shift 1; info_option_version "$@";;
--default ) shift 1; info_option_x_value default "$@";;
--current ) shift 1; info_option_x_value current "$@";;
-? | --help ) shift 1; info_option_help "$@";;
-* ) abort "unrecognised option \`$1'";;
* ) abort "illegal argument \`$1'";;
esac;
}
##############################################################################
# Definition of UNAME, SOURCE, SCRIPT, PREFIX and VERSION
unset SCRIPT;
UNAME=`uname`;
SOURCE=$0;
SCRIPT=`basename "$SOURCE"`;
while [ -h "$SOURCE" ]; do
SCRIPT=`basename "$SOURCE"`;
LOOKUP=`ls -ld "$SOURCE"`;
TARGET=`expr "$LOOKUP" : '.*-> \(.*\)$'`;
if expr "${TARGET:-.}/" : '/.*/$' > /dev/null; then
SOURCE=${TARGET:-.};
else
SOURCE=`dirname "$SOURCE"`/${TARGET:-.};
fi;
done;
PREFIX=`dirname "$SOURCE"`/..;
PREFIX=`cd "$PREFIX"; pwd`;
VERSION={#VERSION#};
VERSION=${VERSION:-"unknown version"};
##############################################################################
# Test of invocation method
if [ -z "$SCRIPT" ]; then
abort "Illegal direct invocation; invoke me through a symbolic link.";
fi;
##############################################################################
# Configuration and invocation of $SCRIPT
configure;
case "$SCRIPT" in
scala-info ) info "$@";;
scala ) scala "$@";;
scala-* ) scala "$@";;
scalac* ) compiler_start "" scala.tools.scalac.Main "$@";;
scalarun* ) compiler_start "" scala.tools.scalai.Main "$@";;
scalaint* ) compiler_start "" scala.tools.scalai.Main -interactive "$@";;
scaladoc* ) tool_start "" scala.tools.scaladoc.Main "$@";;
scalap* ) tool_start "" scala.tools.scalap.Main "$@";;
dtd2scala* ) tool_start "" scala.tools.dtd2scala.Main "$@";;
scalatest* ) tool_start "" scala.tools.scalatest.Main "$@";;
* ) abort "Don't know what to do for $SCRIPT.";;
esac;
##############################################################################