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#!/usr/bin/env bash
#
# A library to simplify using the SBT launcher from other packages.
# Note: This should be used by tools like giter8/conscript etc.
# TODO - Should we merge the main SBT script with this library?
if test -z "$HOME"; then
declare -r script_dir="$(dirname "$script_path")"
else
declare -r script_dir="$HOME/.sbt"
fi
declare -a residual_args
declare -a java_args
declare -a scalac_args
declare -a sbt_commands
declare -a maven_profiles
if test -x "$JAVA_HOME/bin/java"; then
echo -e "Using $JAVA_HOME as default JAVA_HOME."
echo "Note, this will be overridden by -java-home if it is set."
declare java_cmd="$JAVA_HOME/bin/java"
else
declare java_cmd=java
fi
echoerr () {
echo 1>&2 "$@"
}
vlog () {
[[ $verbose || $debug ]] && echoerr "$@"
}
dlog () {
[[ $debug ]] && echoerr "$@"
}
acquire_sbt_jar () {
SBT_VERSION=`awk -F "=" '/sbt\.version/ {print $2}' ./project/build.properties`
URL1=https://dl.bintray.com/typesafe/ivy-releases/org.scala-sbt/sbt-launch/${SBT_VERSION}/sbt-launch.jar
JAR=build/sbt-launch-${SBT_VERSION}.jar
sbt_jar=$JAR
if [[ ! -f "$sbt_jar" ]]; then
# Download sbt launch jar if it hasn't been downloaded yet
if [ ! -f "${JAR}" ]; then
# Download
printf "Attempting to fetch sbt\n"
JAR_DL="${JAR}.part"
if [ $(command -v curl) ]; then
curl --fail --location --silent ${URL1} > "${JAR_DL}" &&\
mv "${JAR_DL}" "${JAR}"
elif [ $(command -v wget) ]; then
wget --quiet ${URL1} -O "${JAR_DL}" &&\
mv "${JAR_DL}" "${JAR}"
else
printf "You do not have curl or wget installed, please install sbt manually from http://www.scala-sbt.org/\n"
exit -1
fi
fi
if [ ! -f "${JAR}" ]; then
# We failed to download
printf "Our attempt to download sbt locally to ${JAR} failed. Please install sbt manually from http://www.scala-sbt.org/\n"
exit -1
fi
printf "Launching sbt from ${JAR}\n"
fi
}
execRunner () {
# print the arguments one to a line, quoting any containing spaces
[[ $verbose || $debug ]] && echo "# Executing command line:" && {
for arg; do
if printf "%s\n" "$arg" | grep -q ' '; then
printf "\"%s\"\n" "$arg"
else
printf "%s\n" "$arg"
fi
done
echo ""
}
"$@"
}
addJava () {
dlog "[addJava] arg = '$1'"
java_args=( "${java_args[@]}" "$1" )
}
enableProfile () {
dlog "[enableProfile] arg = '$1'"
maven_profiles=( "${maven_profiles[@]}" "$1" )
export SBT_MAVEN_PROFILES="${maven_profiles[@]}"
}
addSbt () {
dlog "[addSbt] arg = '$1'"
sbt_commands=( "${sbt_commands[@]}" "$1" )
}
addResidual () {
dlog "[residual] arg = '$1'"
residual_args=( "${residual_args[@]}" "$1" )
}
addDebugger () {
addJava "-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=$1"
}
# a ham-fisted attempt to move some memory settings in concert
# so they need not be dicked around with individually.
get_mem_opts () {
local mem=${1:-2048}
local perm=$(( $mem / 4 ))
(( $perm > 256 )) || perm=256
(( $perm < 4096 )) || perm=4096
local codecache=$(( $perm / 2 ))
echo "-Xms${mem}m -Xmx${mem}m -XX:ReservedCodeCacheSize=${codecache}m"
}
require_arg () {
local type="$1"
local opt="$2"
local arg="$3"
if [[ -z "$arg" ]] || [[ "${arg:0:1}" == "-" ]]; then
echo "$opt requires <$type> argument" 1>&2
exit 1
fi
}
is_function_defined() {
declare -f "$1" > /dev/null
}
process_args () {
while [[ $# -gt 0 ]]; do
case "$1" in
-h|-help) usage; exit 1 ;;
-v|-verbose) verbose=1 && shift ;;
-d|-debug) debug=1 && shift ;;
-ivy) require_arg path "$1" "$2" && addJava "-Dsbt.ivy.home=$2" && shift 2 ;;
-mem) require_arg integer "$1" "$2" && sbt_mem="$2" && shift 2 ;;
-jvm-debug) require_arg port "$1" "$2" && addDebugger $2 && shift 2 ;;
-batch) exec </dev/null && shift ;;
-sbt-jar) require_arg path "$1" "$2" && sbt_jar="$2" && shift 2 ;;
-sbt-version) require_arg version "$1" "$2" && sbt_version="$2" && shift 2 ;;
-java-home) require_arg path "$1" "$2" && java_cmd="$2/bin/java" && export JAVA_HOME=$2 && shift 2 ;;
-D*) addJava "$1" && shift ;;
-J*) addJava "${1:2}" && shift ;;
-P*) enableProfile "$1" && shift ;;
*) addResidual "$1" && shift ;;
esac
done
is_function_defined process_my_args && {
myargs=("${residual_args[@]}")
residual_args=()
process_my_args "${myargs[@]}"
}
}
run() {
# no jar? download it.
[[ -f "$sbt_jar" ]] || acquire_sbt_jar "$sbt_version" || {
# still no jar? uh-oh.
echo "Download failed. Obtain the sbt-launch.jar manually and place it at $sbt_jar"
exit 1
}
# process the combined args, then reset "$@" to the residuals
process_args "$@"
set -- "${residual_args[@]}"
argumentCount=$#
# run sbt
execRunner "$java_cmd" \
${SBT_OPTS:-$default_sbt_opts} \
$(get_mem_opts $sbt_mem) \
${java_opts} \
${java_args[@]} \
-jar "$sbt_jar" \
"${sbt_commands[@]}" \
"${residual_args[@]}"
}
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