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paul's sbt script

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#!/usr/bin/env bash --norc
#
# A more capable sbt runner, coincidentally also called sbt.
# Author: Paul Phillips <paulp@typesafe.com>
 
# this seems to cover the bases on OSX, and someone will
# have to tell me about the others.
get_script_path () {
local path="$1"
[[ -L "$path" ]] || { echo "$path" ; return; }
 
local target=$(readlink "$path")
if [[ "${target:0:1}" == "/" ]]; then
echo "$target"
else
echo "$path/$target"
fi
}
 
# 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=${1:-1536}
local perm=$(( $mem / 4 ))
# (( $perm > 256 )) || perm=256
(( $perm > 256 )) || perm=512
(( $perm < 1024 )) || perm=1024
local codecache=$(( $perm / 8 ))
echo "-Xms${mem}m -Xmx${mem}m -XX:MaxPermSize=${perm}m -XX:ReservedCodeCacheSize=${codecache}m"
}
 
die() {
echo "Aborting: $@"
exit 1
}
 
# Following line added by Toby for JRebel support
export JAVA_OPTS="-noverify -javaagent:/Applications/ZeroTurnaround/JRebel/jrebel.jar -Xms256m -Xmx1G $JAVA_OPTS"
 
# todo - make this dynamic
declare -r sbt_release_version=0.11.0
unset sbt_rc_version
# declare -r sbt_rc_version=
declare -r sbt_snapshot_version=0.11.1-SNAPSHOT
declare -r sbt_snapshot_baseurl="http://typesafe.artifactoryonline.com/typesafe/ivy-snapshots/org.scala-tools.sbt/sbt-launch/"
 
declare -r default_java_opts="-Dfile.encoding=UTF8"
declare -r default_sbt_opts="-XX:+CMSClassUnloadingEnabled"
declare -r default_sbt_mem=1536
declare -r noshare_opts="-Dsbt.global.base=project/.sbt -Dsbt.boot.directory=project/.boot -Dsbt.ivy.home=project/.ivy"
declare -r sbt_opts_file=".sbtopts"
declare -r latest_28="2.8.2"
declare -r latest_29="2.9.1"
declare -r latest_210="2.10.0-SNAPSHOT"
 
declare -r script_path=$(get_script_path "$BASH_SOURCE")
declare -r script_dir="$(dirname $script_path)"
declare -r script_name="$(basename $script_path)"
 
declare java_cmd=java
declare sbt_mem=$default_sbt_mem
declare java_opts="${JAVA_OPTS:-$default_java_opts}"
 
unset sbt_jar sbt_create sbt_version sbt_snapshot
unset scala_version
unset java_home
unset verbose debug
 
# pull -J and -D options to give to java.
declare -a residual_args
declare -a java_args
declare -a sbt_commands
 
build_props_sbt () {
if [[ -f project/build.properties ]]; then
versionLine=$(grep ^sbt.version project/build.properties)
versionString=${versionLine##sbt.version=}
echo "$versionString"
fi
}
build_props_scala () {
if [[ -f project/build.properties ]]; then
versionLine=$(grep ^build.scala.versions project/build.properties)
versionString=${versionLine##build.scala.versions=}
echo ${versionString%% .*}
fi
}
 
isSnapshot () {
[[ "$sbt_version" = *-SNAPSHOT* ]]
}
isRC () {
[[ "$sbt_version" = *-RC* ]]
}
 
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 ""
}
 
"$@"
}
 
echoerr () {
echo 1>&2 "$@"
}
dlog () {
[[ $verbose || $debug ]] && echoerr "$@"
}
 
sbtjar_07_url () {
echo "http://simple-build-tool.googlecode.com/files/sbt-launch-${1}.jar"
}
sbtjar_release_url () {
echo "http://typesafe.artifactoryonline.com/typesafe/ivy-releases/org.scala-tools.sbt/sbt-launch/$sbt_version/sbt-launch.jar"
}
sbtjar_snapshot_url () {
local ver="$sbt_version"
if [[ "$sbt_version" = *-SNAPSHOT ]]; then
ver=$(sbt_snapshot_actual_version -SNAPSHOT)
echoerr "sbt snapshot is $ver"
elif [[ "$sbt_version" = *-SNAPSHOT ]]; then
ver=$(sbt_snapshot_actual_version -RC)
echoerr "sbt rc is $ver"
fi
 
echo "${sbt_snapshot_baseurl}${ver}/sbt-launch.jar"
}
jar_url () {
case $sbt_version in
0.7.4*) sbtjar_07_url 0.7.4 ;;
0.7.5*) sbtjar_07_url 0.7.5 ;;
0.7.7*) sbtjar_07_url 0.7.7 ;;
0.7.*) sbtjar_07_url 0.7.7 ;;
*-SNAPSHOT*) sbtjar_snapshot_url ;;
*-RC*) sbtjar_snapshot_url ;;
*) sbtjar_release_url ;;
esac
}
 
jar_file () {
echo "$script_dir/.lib/$1/sbt-launch.jar"
}
 
sbt_artifactory_list () {
local type="$1" # -RC or -SNAPSHOT
local version=${sbt_version%-SNAPSHOT}
curl -s --list-only "$sbt_snapshot_baseurl" | \
grep -F $version | \
perl -e 'print reverse <>' | \
perl -pe 's#^<a href="([^"/]+).*#$1#;'
}
 
# argument is e.g. 0.11.0-SNAPSHOT
# finds the actual version (with the build id) at artifactory
sbt_snapshot_actual_version () {
for ver in $(sbt_artifactory_list "$1"); do
local url="$sbt_snapshot_baseurl$ver/sbt-launch.jar"
dlog "Testing $url"
curl -s --head "$url" >/dev/null
dlog "curl returned: $?"
echo "$ver"
return
done
}
 
download_url () {
local url="$1"
local jar="$2"
echo "Downloading sbt launcher $sbt_version:"
echo " From $url"
echo " To $jar"
 
mkdir -p $(dirname "$jar") && {
if which curl >/dev/null; then
curl --silent "$url" --output "$jar"
elif which wget >/dev/null; then
wget --quiet -O "$jar" "$url"
fi
} && [[ -f "$jar" ]]
}
 
acquire_sbt_jar () {
if [[ $sbt_snapshot ]]; then
sbt_version=$sbt_snapshot_version
elif [[ ! $sbt_version ]]; then
sbt_version=$sbt_release_version
fi
sbt_url="$(jar_url)"
sbt_jar="$(jar_file $sbt_version)"
 
[[ -f "$sbt_jar" ]] || download_url "$sbt_url" "$sbt_jar"
}
 
 
usage () {
cat <<EOM
Usage: $script_name [options]
 
-h | -help print this message
-v | -verbose this runner is chattier
-d | -debug set sbt log level to debug
-no-colors disable ANSI color codes
-sbt-create start sbt even if current directory contains no sbt project
-sbt-dir <path> path to global settings/plugins directory (default: ~/.sbt)
-sbt-boot <path> path to shared boot directory (default: ~/.sbt/boot in 0.11 series)
-ivy <path> path to local Ivy repository (default: ~/.ivy2)
-mem <integer> set memory options (default: $sbt_mem, which is $(get_mem_opts $sbt_mem))
-no-share use all local caches; no sharing
 
# sbt version (default: from project/build.properties if present, else latest release)
-sbt-version <version> use the specified version of sbt
-sbt-jar <path> use the specified jar as the sbt launcher
-sbt-rc use an RC version of sbt
-sbt-snapshot use a snapshot version of sbt
 
# scala version (default: latest release)
-28 use $latest_28
-29 use $latest_29
-210 use $latest_210
-scala-home <path> use the scala build at the specified directory
-scala-version <version> use the specified version of scala
 
# java version (default: java from PATH, currently $(java -version |& grep version))
-java-home <path> alternate JAVA_HOME
 
# jvm options and output control
JAVA_OPTS environment variable, if unset uses "$java_opts"
SBT_OPTS environment variable, if unset uses "$default_sbt_opts"
.sbtopts if this file exists in the sbt root, it is prepended to the runner args
-Dkey=val pass -Dkey=val directly to the java runtime
-J-X pass option -X directly to the java runtime (-J is stripped)
 
In the case of duplicated or conflicting options, the order above
shows precedence: JAVA_OPTS lowest, command line options highest.
EOM
}
 
addJava () {
dlog "[addJava] arg = '$1'"
java_args=( "${java_args[@]}" "$1" )
}
addSbt () {
dlog "[addSbt] arg = '$1'"
sbt_commands=( "${sbt_commands[@]}" "$1" )
}
addResidual () {
dlog "[residual] arg = '$1'"
residual_args=( "${residual_args[@]}" "$1" )
}
addResolver () {
addSbt "set resolvers in ThisBuild += $1"
}
addSnapshotRepo () {
addResolver "ScalaToolsSnapshots"
}
 
process_args ()
{
while [[ $# -gt 0 ]]; do
case "$1" in
-h|-help) usage; exit 1 ;;
-v|-verbose) verbose=1; shift ;;
-d|-debug) debug=1; shift ;;
# -u|-upgrade) addSbt 'set sbt.version 0.7.7' ; addSbt reload ; shift ;;
 
-ivy) addJava "-Dsbt.ivy.home=$2"; shift 2 ;;
-mem) sbt_mem="$2"; shift 2 ;;
-no-colors) addJava "-Dsbt.log.noformat=true"; shift ;;
-no-share) addJava "$noshare_opts"; shift ;;
-sbt-boot) addJava "-Dsbt.boot.directory=$2"; shift 2 ;;
-sbt-dir) addJava "-Dsbt.global.base=$2"; shift 2 ;;
-debug-inc) addJava "-Dxsbt.inc.debug=true"; shift ;;
 
-sbt-create) sbt_create=true; shift ;;
-sbt-rc) [[ -n "$sbt_rc_version" ]] || die "no sbt RC candidate defined."; sbt_version=$sbt_rc_version; shift ;;
-sbt-snapshot) addSnapshotRepo ; sbt_version=$sbt_snapshot_version; shift ;;
-sbt-jar) sbt_jar="$2"; shift 2 ;;
-sbt-version) sbt_version="$2"; shift 2 ;;
-scala-version) addSbt "++ $2"; shift 2 ;;
-scala-home) addSbt "set scalaHome in ThisBuild := Some(file(\"$2\"))"; shift 2 ;;
-java-home) java_cmd="$2/bin/java"; shift 2 ;;
 
-D*) addJava "$1"; shift ;;
-J*) addJava "${1:2}"; shift ;;
-28) addSbt "++ $latest_28"; shift ;;
-29) addSbt "++ $latest_29"; shift ;;
-210) addSnapshotRepo ; addSbt "++ $latest_210"; shift ;;
 
*) addResidual "$1"; shift ;;
esac
done
[[ $debug ]] && {
case "$sbt_version" in
0.7*) addSbt "debug" ;;
*) addSbt "set logLevel in Global := Level.Debug" ;;
esac
}
}
 
# if .sbtopts exists, prepend its contents to $@ so it can be processed by this runner
[[ -f "$sbt_opts_file" ]] && set -- $(cat "$sbt_opts_file") "$@"
 
# process the combined args, then reset "$@" to the residuals
process_args "$@"
set -- "${residual_args[@]}"
argumentCount=$#
 
# figure out the version
[[ "$sbt_version" ]] || sbt_version=$(build_props_sbt)
[[ "$sbt_version" = *-SNAPSHOT* || "$sbt_version" = *-RC* ]] && sbt_snapshot=1
[[ -n "$sbt_version" ]] && echo "Detected sbt version $sbt_version"
[[ -n "$scala_version" ]] && echo "Detected scala version $scala_version"
 
# no args - alert them there's stuff in here
(( $argumentCount > 0 )) || echo "Starting $script_name: invoke with -help for other options"
 
# verify this is an sbt dir or -create was given
[[ -f ./build.sbt || -d ./project || -n "$sbt_create" ]] || {
cat <<EOM
$(pwd) doesn't appear to be an sbt project.
If you want to start sbt anyway, run:
$0 -sbt-create
 
EOM
exit 1
}
 
# pick up completion if present; todo
[[ -f .sbt_completion.sh ]] && source .sbt_completion.sh
 
# no jar? download it.
[[ -f "$sbt_jar" ]] || acquire_sbt_jar || {
# still no jar? uh-oh.
echo "Download failed. Obtain the jar manually and place it at $sbt_jar"
exit 1
}
 
# since sbt 0.7 doesn't understand iflast
(( ${#residual_args[@]} == 0 )) && residual_args=( "shell" )
 
# run sbt
execRunner "$java_cmd" \
${java_opts} \
${SBT_OPTS:-$default_sbt_opts} \
$(get_mem_opts $sbt_mem) \
${java_args[@]} \
-jar "$sbt_jar" \
"${sbt_commands[@]}" \
"${residual_args[@]}"

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