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#!/usr/bin/env bash

# A more capable sbt runner, coincidentally also called sbt.

# Author: Paul Phillips <[email protected]>

set -o pipefail

declare -r sbt_release_version="0.13.16"

declare -r sbt_unreleased_version="0.13.16"

declare -r latest_213="2.13.0-M2"

declare -r latest_212="2.12.4"

declare -r latest_211="2.11.11"

declare -r latest_210="2.10.6"

declare -r latest_29="2.9.3"

declare -r latest_28="2.8.2"

declare -r buildProps="project/build.properties"

declare -r sbt_launch_ivy_release_repo="http://repo.typesafe.com/typesafe/ivy-releases"

declare -r sbt_launch_ivy_snapshot_repo="https://repo.scala-sbt.org/scalasbt/ivy-snapshots"

declare -r sbt_launch_mvn_release_repo="http://repo.scala-sbt.org/scalasbt/maven-releases"

declare -r sbt_launch_mvn_snapshot_repo="http://repo.scala-sbt.org/scalasbt/maven-snapshots"

declare -r default_jvm_opts_common="-Xms512m -Xmx1536m -Xss2m"

declare -r noshare_opts="-Dsbt.global.base=project/.sbtboot -Dsbt.boot.directory=project/.boot -Dsbt.ivy.home=project/.ivy"

declare sbt_jar sbt_dir sbt_create sbt_version sbt_script sbt_new

declare sbt_explicit_version

declare verbose noshare batch trace_level

declare debugUs

declare java_cmd="java"

declare sbt_launch_dir="$HOME/.sbt/launchers"

declare sbt_launch_repo

# pull -J and -D options to give to java.

declare -a java_args scalac_args sbt_commands residual_args

# args to jvm/sbt via files or environment variables

declare -a extra_jvm_opts extra_sbt_opts

echoerr () { echo >&2 "$@"; }

vlog () { [[ -n "$verbose" ]] && echoerr "$@"; }

die () { echo "Aborting: $@" ; exit 1; }

setTrapExit () {

# save stty and trap exit, to ensure echo is re-enabled if we are interrupted.

export SBT_STTY="$(stty -g 2>/dev/null)"

# restore stty settings (echo in particular)

onSbtRunnerExit() {

[ -t 0 ] || return

vlog ""

vlog "restoring stty: $SBT_STTY"

stty "$SBT_STTY"

}

vlog "saving stty: $SBT_STTY"

trap onSbtRunnerExit EXIT

}

# 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"

}

declare -r script_path="$(get_script_path "$BASH_SOURCE")"

declare -r script_name="${script_path##*/}"

init_default_option_file () {

local overriding_var="${!1}"

local default_file="$2"

if [[ ! -r "$default_file" && "$overriding_var" =~ ^@(.*)$ ]]; then

local envvar_file="${BASH_REMATCH[1]}"

if [[ -r "$envvar_file" ]]; then

default_file="$envvar_file"

echo "$default_file"

}

declare sbt_opts_file="$(init_default_option_file SBT_OPTS .sbtopts)"

declare jvm_opts_file="$(init_default_option_file JVM_OPTS .jvmopts)"

build_props_sbt () {

[[ -r "$buildProps" ]] && \

grep '^sbt\.version' "$buildProps" | tr '=\r' ' ' | awk '{ print $2; }'

}

update_build_props_sbt () {

local ver="$1"

local old="$(build_props_sbt)"

[[ -r "$buildProps" ]] && [[ "$ver" != "$old" ]] && {

perl -pi -e "s/^sbt\.version\b.*\$/sbt.version=${ver}/" "$buildProps"

grep -q '^sbt.version[ =]' "$buildProps" || printf "\nsbt.version=%s\n" "$ver" >> "$buildProps"

vlog "!!!"

vlog "!!! Updated file $buildProps setting sbt.version to: $ver"

vlog "!!! Previous value was: $old"

vlog "!!!"

}

set_sbt_version () {

sbt_version="${sbt_explicit_version:-$(build_props_sbt)}"

[[ -n "$sbt_version" ]] || sbt_version=$sbt_release_version

export sbt_version

}

url_base () {

local version="$1"

case "$version" in

0.7.*) echo "http://simple-build-tool.googlecode.com" ;;

0.10.* ) echo "$sbt_launch_ivy_release_repo" ;;

0.11.[12]) echo "$sbt_launch_ivy_release_repo" ;;

0.*-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]-[0-9][0-9][0-9][0-9][0-9][0-9]) # ie "*-yyyymmdd-hhMMss"

echo "$sbt_launch_ivy_snapshot_repo" ;;

0.*) echo "$sbt_launch_ivy_release_repo" ;;

*-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]-[0-9][0-9][0-9][0-9][0-9][0-9]) # ie "*-yyyymmdd-hhMMss"

echo "$sbt_launch_mvn_snapshot_repo" ;;

*) echo "$sbt_launch_mvn_release_repo" ;;

esac

}

make_url () {

local version="$1"

local base="${sbt_launch_repo:-$(url_base "$version")}"

case "$version" in

0.7.*) echo "$base/files/sbt-launch-0.7.7.jar" ;;

0.10.* ) echo "$base/org.scala-tools.sbt/sbt-launch/$version/sbt-launch.jar" ;;

0.11.[12]) echo "$base/org.scala-tools.sbt/sbt-launch/$version/sbt-launch.jar" ;;

0.*) echo "$base/org.scala-sbt/sbt-launch/$version/sbt-launch.jar" ;;

*) echo "$base/org/scala-sbt/sbt-launch/$version/sbt-launch.jar" ;;

esac

}

addJava () { vlog "[addJava] arg = '$1'" ; java_args+=("$1"); }

addSbt () { vlog "[addSbt] arg = '$1'" ; sbt_commands+=("$1"); }

addScalac () { vlog "[addScalac] arg = '$1'" ; scalac_args+=("$1"); }

addResidual () { vlog "[residual] arg = '$1'" ; residual_args+=("$1"); }

addResolver () { addSbt "set resolvers += $1"; }

addDebugger () { addJava "-Xdebug" ; addJava "-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=$1"; }

setThisBuild () {

vlog "[addBuild] args = '$@'"

local key="$1" && shift

addSbt "set $key in ThisBuild := $@"

}

setScalaVersion () {

[[ "$1" == *"-SNAPSHOT" ]] && addResolver 'Resolver.sonatypeRepo("snapshots")'

addSbt "++ $1"

}

setJavaHome () {

java_cmd="$1/bin/java"

setThisBuild javaHome "_root_.scala.Some(file(\"$1\"))"

export JAVA_HOME="$1"

export JDK_HOME="$1"

export PATH="$JAVA_HOME/bin:$PATH"

}

getJavaVersion() { "$1" -version 2>&1 | grep -E -e '(java|openjdk) version' | awk '{ print $3 }' | tr -d \"; }

checkJava() {

# Warn if there is a Java version mismatch between PATH and JAVA_HOME/JDK_HOME

[[ -n "$JAVA_HOME" && -e "$JAVA_HOME/bin/java" ]] && java="$JAVA_HOME/bin/java"

[[ -n "$JDK_HOME" && -e "$JDK_HOME/lib/tools.jar" ]] && java="$JDK_HOME/bin/java"

if [[ -n "$java" ]]; then

pathJavaVersion=$(getJavaVersion java)

homeJavaVersion=$(getJavaVersion "$java")

if [[ "$pathJavaVersion" != "$homeJavaVersion" ]]; then

echoerr "Warning: Java version mismatch between PATH and JAVA_HOME/JDK_HOME, sbt will use the one in PATH"

echoerr " Either: fix your PATH, remove JAVA_HOME/JDK_HOME or use -java-home"

echoerr " java version from PATH: $pathJavaVersion"

echoerr " java version from JAVA_HOME/JDK_HOME: $homeJavaVersion"

}

java_version () {

local version=$(getJavaVersion "$java_cmd")

vlog "Detected Java version: $version"

echo "${version:2:1}"

}

# MaxPermSize critical on pre-8 JVMs but incurs noisy warning on 8+

default_jvm_opts () {

local v="$(java_version)"

if [[ $v -ge 8 ]]; then

echo "$default_jvm_opts_common"

else

echo "-XX:MaxPermSize=384m $default_jvm_opts_common"

}

build_props_scala () {

if [[ -r "$buildProps" ]]; then

versionLine="$(grep '^build.scala.versions' "$buildProps")"

versionString="${versionLine##build.scala.versions=}"

echo "${versionString%% .*}"

}

execRunner () {

# print the arguments one to a line, quoting any containing spaces

vlog "# Executing command line:" && {

for arg; do

if [[ -n "$arg" ]]; then

if printf "%s\n" "$arg" | grep -q ' '; then

printf >&2 "\"%s\"\n" "$arg"

else

printf >&2 "%s\n" "$arg"

done

vlog ""

}

setTrapExit

if [[ -n "$batch" ]]; then

"$@" < /dev/null

else

"$@"

}

jar_url () { make_url "$1"; }

is_cygwin () [[ "$(uname -a)" == "CYGWIN"* ]]

jar_file () {

is_cygwin \

&& echo "$(cygpath -w $sbt_launch_dir/"$1"/sbt-launch.jar)" \

|| echo "$sbt_launch_dir/$1/sbt-launch.jar"

}

download_url () {

local url="$1"

local jar="$2"

echoerr "Downloading sbt launcher for $sbt_version:"

echoerr " From $url"

echoerr " To $jar"

mkdir -p "${jar%/*}" && {

if which curl >/dev/null; then

curl --fail --silent --location "$url" --output "$jar"

elif which wget >/dev/null; then

wget -q -O "$jar" "$url"

} && [[ -r "$jar" ]]

}

acquire_sbt_jar () {

{

sbt_jar="$(jar_file "$sbt_version")"

[[ -r "$sbt_jar" ]]

} || {

sbt_jar="$HOME/.ivy2/local/org.scala-sbt/sbt-launch/$sbt_version/jars/sbt-launch.jar"

[[ -r "$sbt_jar" ]]

} || {

sbt_jar="$(jar_file "$sbt_version")"

download_url "$(make_url "$sbt_version")" "$sbt_jar"

}

usage () {

set_sbt_version

cat <<EOM

Usage: $script_name [options]

Note that options which are passed along to sbt begin with -- whereas

options to this runner use a single dash. Any sbt command can be scheduled

to run first by prefixing the command with --, so --warn, --error and so on

are not special.

Output filtering: if there is a file in the home directory called .sbtignore

and this is not an interactive sbt session, the file is treated as a list of

bash regular expressions. Output lines which match any regex are not echoed.

One can see exactly which lines would have been suppressed by starting this

runner with the -x option.

-h | -help print this message

-v verbose operation (this runner is chattier)

-d, -w, -q aliases for --debug, --warn, --error (q means quiet)

-x debug this script

-trace <level> display stack traces with a max of <level> frames (default: -1, traces suppressed)

-debug-inc enable debugging log for the incremental compiler

-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/<version>)

-sbt-boot <path> path to shared boot directory (default: ~/.sbt/boot in 0.11+)

-ivy <path> path to local Ivy repository (default: ~/.ivy2)

-no-share use all local caches; no sharing

-offline put sbt in offline mode

-jvm-debug <port> Turn on JVM debugging, open at the given port.

-batch Disable interactive mode

-prompt <expr> Set the sbt prompt; in expr, 's' is the State and 'e' is Extracted

-script <file> Run the specified file as a scala script

# sbt version (default: sbt.version from $buildProps if present, otherwise $sbt_release_version)

-sbt-force-latest force the use of the latest release of sbt: $sbt_release_version

-sbt-version <version> use the specified version of sbt (default: $sbt_release_version)

-sbt-dev use the latest pre-release version of sbt: $sbt_unreleased_version

-sbt-jar <path> use the specified jar as the sbt launcher

-sbt-launch-dir <path> directory to hold sbt launchers (default: $sbt_launch_dir)

-sbt-launch-repo <url> repo url for downloading sbt launcher jar (default: $(url_base "$sbt_version"))

# scala version (default: as chosen by sbt)

-28 use $latest_28

-29 use $latest_29

-210 use $latest_210

-211 use $latest_211

-212 use $latest_212

-213 use $latest_213

-scala-home <path> use the scala build at the specified directory

-scala-version <version> use the specified version of scala

-binary-version <version> use the specified scala version when searching for dependencies

# java version (default: java from PATH, currently $(java -version 2>&1 | grep version))

-java-home <path> alternate JAVA_HOME

# passing options to the jvm - note it does NOT use JAVA_OPTS due to pollution

# The default set is used if JVM_OPTS is unset and no -jvm-opts file is found

<default> $(default_jvm_opts)

JVM_OPTS environment variable holding either the jvm args directly, or

the reference to a file containing jvm args if given path is prepended by '@' (e.g. '@/etc/jvmopts')

Note: "@"-file is overridden by local '.jvmopts' or '-jvm-opts' argument.

-jvm-opts <path> file containing jvm args (if not given, .jvmopts in project root is used if present)

-Dkey=val pass -Dkey=val directly to the jvm

-J-X pass option -X directly to the jvm (-J is stripped)

# passing options to sbt, OR to this runner

SBT_OPTS environment variable holding either the sbt args directly, or

the reference to a file containing sbt args if given path is prepended by '@' (e.g. '@/etc/sbtopts')

Note: "@"-file is overridden by local '.sbtopts' or '-sbt-opts' argument.

-sbt-opts <path> file containing sbt args (if not given, .sbtopts in project root is used if present)

-S-X add -X to sbt's scalacOptions (-S is stripped)

EOM

}

process_args () {

require_arg () {

local type="$1"

local opt="$2"

local arg="$3"

if [[ -z "$arg" ]] || [[ "${arg:0:1}" == "-" ]]; then

die "$opt requires <$type> argument"

}

while [[ $# -gt 0 ]]; do

case "$1" in

-h|-help) usage; exit 0 ;;

-v) verbose=true && shift ;;

-d) addSbt "--debug" && shift ;;

-w) addSbt "--warn" && shift ;;

-q) addSbt "--error" && shift ;;

-x) debugUs=true && shift ;;

-trace) require_arg integer "$1" "$2" && trace_level="$2" && shift 2 ;;

-ivy) require_arg path "$1" "$2" && addJava "-Dsbt.ivy.home=$2" && shift 2 ;;

-no-colors) addJava "-Dsbt.log.noformat=true" && shift ;;

-no-share) noshare=true && shift ;;

-sbt-boot) require_arg path "$1" "$2" && addJava "-Dsbt.boot.directory=$2" && shift 2 ;;

-sbt-dir) require_arg path "$1" "$2" && sbt_dir="$2" && shift 2 ;;

-debug-inc) addJava "-Dxsbt.inc.debug=true" && shift ;;

-offline) addSbt "set offline in Global := true" && shift ;;

-jvm-debug) require_arg port "$1" "$2" && addDebugger "$2" && shift 2 ;;

-batch) batch=true && shift ;;

-prompt) require_arg "expr" "$1" "$2" && setThisBuild shellPrompt "(s => { val e = Project.extract(s) ; $2 })" && shift 2 ;;

-script) require_arg file "$1" "$2" && sbt_script="$2" && addJava "-Dsbt.main.class=sbt.ScriptMain" && shift 2 ;;

-sbt-create) sbt_create=true && shift ;;

-sbt-jar) require_arg path "$1" "$2" && sbt_jar="$2" && shift 2 ;;

-sbt-version) require_arg version "$1" "$2" && sbt_explicit_version="$2" && shift 2 ;;

-sbt-force-latest) sbt_explicit_version="$sbt_release_version" && shift ;;

-sbt-dev) sbt_explicit_version="$sbt_unreleased_version" && shift ;;

-sbt-launch-dir) require_arg path "$1" "$2" && sbt_launch_dir="$2" && shift 2 ;;

-sbt-launch-repo) require_arg path "$1" "$2" && sbt_launch_repo="$2" && shift 2 ;;

-scala-version) require_arg version "$1" "$2" && setScalaVersion "$2" && shift 2 ;;

-binary-version) require_arg version "$1" "$2" && setThisBuild scalaBinaryVersion "\"$2\"" && shift 2 ;;

-scala-home) require_arg path "$1" "$2" && setThisBuild scalaHome "_root_.scala.Some(file(\"$2\"))" && shift 2 ;;

-java-home) require_arg path "$1" "$2" && setJavaHome "$2" && shift 2 ;;

-sbt-opts) require_arg path "$1" "$2" && sbt_opts_file="$2" && shift 2 ;;

-jvm-opts) require_arg path "$1" "$2" && jvm_opts_file="$2" && shift 2 ;;

-D*) addJava "$1" && shift ;;

-J*) addJava "${1:2}" && shift ;;

-S*) addScalac "${1:2}" && shift ;;

-28) setScalaVersion "$latest_28" && shift ;;

-29) setScalaVersion "$latest_29" && shift ;;

-210) setScalaVersion "$latest_210" && shift ;;

-211) setScalaVersion "$latest_211" && shift ;;

-212) setScalaVersion "$latest_212" && shift ;;

-213) setScalaVersion "$latest_213" && shift ;;

new) sbt_new=true && : ${sbt_explicit_version:=$sbt_release_version} && addResidual "$1" && shift ;;

*) addResidual "$1" && shift ;;

esac

done

}

# process the direct command line arguments

process_args "$@"

# skip #-styled comments and blank lines

readConfigFile() {

local end=false

until $end; do

read || end=true

[[ $REPLY =~ ^# ]] || [[ -z $REPLY ]] || echo "$REPLY"

done < "$1"

}

# if there are file/environment sbt_opts, process again so we

# can supply args to this runner

if [[ -r "$sbt_opts_file" ]]; then

vlog "Using sbt options defined in file $sbt_opts_file"

while read opt; do extra_sbt_opts+=("$opt"); done < <(readConfigFile "$sbt_opts_file")

elif [[ -n "$SBT_OPTS" && ! ("$SBT_OPTS" =~ ^@.*) ]]; then

vlog "Using sbt options defined in variable \$SBT_OPTS"

extra_sbt_opts=( $SBT_OPTS )

else

vlog "No extra sbt options have been defined"

[[ -n "${extra_sbt_opts[*]}" ]] && process_args "${extra_sbt_opts[@]}"

# reset "$@" to the residual args

set -- "${residual_args[@]}"

argumentCount=$#

# set sbt version

set_sbt_version

checkJava

# only exists in 0.12+

setTraceLevel() {

case "$sbt_version" in

"0.7."* | "0.10."* | "0.11."* ) echoerr "Cannot set trace level in sbt version $sbt_version" ;;

*) setThisBuild traceLevel $trace_level ;;

esac

}

# set scalacOptions if we were given any -S opts

[[ ${#scalac_args[@]} -eq 0 ]] || addSbt "set scalacOptions in ThisBuild += \"${scalac_args[@]}\""

# Update build.properties on disk to set explicit version - sbt gives us no choice

[[ -n "$sbt_explicit_version" && -z "$sbt_new" ]] && update_build_props_sbt "$sbt_explicit_version"

vlog "Detected sbt version $sbt_version"

if [[ -n "$sbt_script" ]]; then

residual_args=( $sbt_script ${residual_args[@]} )

else

# no args - alert them there's stuff in here

(( argumentCount > 0 )) || {

vlog "Starting $script_name: invoke with -help for other options"

residual_args=( shell )

}

# verify this is an sbt dir, -create was given or user attempts to run a scala script

[[ -r ./build.sbt || -d ./project || -n "$sbt_create" || -n "$sbt_script" || -n "$sbt_new" ]] || {

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

[[ -r .sbt_completion.sh ]] && source .sbt_completion.sh

# directory to store sbt launchers

[[ -d "$sbt_launch_dir" ]] || mkdir -p "$sbt_launch_dir"

[[ -w "$sbt_launch_dir" ]] || sbt_launch_dir="$(mktemp -d -t sbt_extras_launchers.XXXXXX)"

# no jar? download it.

[[ -r "$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

}

if [[ -n "$noshare" ]]; then

for opt in ${noshare_opts}; do

addJava "$opt"

done

else

case "$sbt_version" in

"0.7."* | "0.10."* | "0.11."* | "0.12."* )

[[ -n "$sbt_dir" ]] || {

sbt_dir="$HOME/.sbt/$sbt_version"

vlog "Using $sbt_dir as sbt dir, -sbt-dir to override."

}

;;

esac

if [[ -n "$sbt_dir" ]]; then

addJava "-Dsbt.global.base=$sbt_dir"

if [[ -r "$jvm_opts_file" ]]; then

vlog "Using jvm options defined in file $jvm_opts_file"

while read opt; do extra_jvm_opts+=("$opt"); done < <(readConfigFile "$jvm_opts_file")

elif [[ -n "$JVM_OPTS" && ! ("$JVM_OPTS" =~ ^@.*) ]]; then

vlog "Using jvm options defined in \$JVM_OPTS variable"

extra_jvm_opts=( $JVM_OPTS )

else

vlog "Using default jvm options"

extra_jvm_opts=( $(default_jvm_opts) )

# traceLevel is 0.12+

[[ -n "$trace_level" ]] && setTraceLevel

main () {

execRunner "$java_cmd" \

"${extra_jvm_opts[@]}" \

"${java_args[@]}" \

-jar "$sbt_jar" \

"${sbt_commands[@]}" \

"${residual_args[@]}"

}

# sbt inserts this string on certain lines when formatting is enabled:

# val OverwriteLine = "\r\u001BM\u001B[2K"

# ...in order not to spam the console with a million "Resolving" lines.

# Unfortunately that makes it that much harder to work with when

# we're not going to print those lines anyway. We strip that bit of

# line noise, but leave the other codes to preserve color.

mainFiltered () {

local ansiOverwrite='\r\x1BM\x1B[2K'

local excludeRegex=$(egrep -v '^#|^$' ~/.sbtignore | paste -sd'|' -)

echoLine () {

local line="$1"

local line1="$(echo "$line" | sed 's/\r\x1BM\x1B\[2K//g')" # This strips the OverwriteLine code.

local line2="$(echo "$line1" | sed 's/\x1B\[[0-9;]*[JKmsu]//g')" # This strips all codes - we test regexes against this.

if [[ $line2 =~ $excludeRegex ]]; then

[[ -n $debugUs ]] && echo "[X] $line1"

else

[[ -n $debugUs ]] && echo " $line1" || echo "$line1"

}

echoLine "Starting sbt with output filtering enabled."

main | while read -r line; do echoLine "$line"; done

}

# Only filter if there's a filter file and we don't see a known interactive command.

# Obviously this is super ad hoc but I don't know how to improve on it. Testing whether

# stdin is a terminal is useless because most of my use cases for this filtering are

# exactly when I'm at a terminal, running sbt non-interactively.

shouldFilter () { [[ -f ~/.sbtignore ]] && ! egrep -q '\b(shell|console|consoleProject)\b' <<<"${residual_args[@]}"; }

# run sbt

if shouldFilter; then mainFiltered; else main; fi