Akka/Scala example source code file (extra-build-steps.sh)

This example Akka source code file (extra-build-steps.sh) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Akka and Scala source code examples by using tags.

All credit for the original source code belongs to akka.io; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Akka tags/keywords

akka_build_java8_home, akka_build_java_home, eom, java_home, p, path, print, set, usage, version

The extra-build-steps.sh Akka example source code

#!/usr/bin/env bash

# defaults
declare -r default_java_home="/usr/local/share/java/jdk6"
declare -r default_java8_home="/usr/local/share/java/jdk8"

# get the source location for this script; handles symlinks
function get_script_path {
  local source="${BASH_SOURCE[0]}"
  while [ -h "${source}" ] ; do
    source="$(readlink "${source}")";
  done
  echo ${source}
}

# path, name, and dir for this script
declare -r script_path=$(get_script_path)
declare -r script_name=$(basename "${script_path}")
declare -r script_dir="$(cd -P "$(dirname "${script_path}")" && pwd)"

# print usage info
function usage {
  cat <<EOM
Usage: ${script_name} [options] VERSION
  -h | --help        Print this usage message
  --java_home PATH   Set the path to the "standard" java version
  --java8_home PATH  Set the path to the java 8 version

This script assumes that the mvn command is in your path.
EOM
}

# echo a log message
function echolog {
  echo "[${script_name}] $@"
}

# echo an error message
function echoerr {
  echo "[${script_name}] $@" 1>&2
}

# fail the script with an error message
function fail {
  echoerr "$@"
  exit 1
}

# try to run a command or otherwise fail with a message
function try {
  "${@:1:$#-1}" || fail "${@:$#}"
}

# try to run a command or otherwise fail
function check {
  type -P "$@" &> /dev/null || fail "command not found: $@"
}

# run mvn clean test using the specified java home in the specified directory
function mvncleantest {
  tmp="$script_dir/../../$2"
  try cd  "$tmp" "can't step into project directory: $tmp"
  export JAVA_HOME="$1"
  try mvn clean test "mvn execution in $2 failed"
}

# initialize variables with defaults and override from environment
declare java_home="$default_java_home"
if [ $AKKA_BUILD_JAVA_HOME ]; then
  java_home="$AKKA_BUILD_JAVA_HOME"
fi

declare java8_home="$default_java8_home"
if [ $AKKA_BUILD_JAVA8_HOME ]; then
  java8_home="$AKKA_BUILD_JAVA8_HOME"
fi

# process options and set flags
while true; do
  case "$1" in
    -h | --help ) usage; exit 1 ;;
    --java_home ) java_home=$2; shift 2 ;;
    --java8_home ) java8_home=$2; shift 2 ;;
    * ) break ;;
  esac
done

declare -r java_path="$java_home/bin/java"
declare -r java8_path="$java8_home/bin/java"

# check that java paths work
check "$java_path"
check "$java8_path"

# check for a mvn command
check mvn

# now do some work
mvncleantest "$java8_home" "akka-samples/akka-docs-java-lambda"

mvncleantest "$java8_home" "akka-samples/akka-sample-fsm-java-lambda"

mvncleantest "$java8_home" "akka-samples/akka-sample-persistence-java-lambda"

mvncleantest "$java8_home" "akka-samples/akka-sample-supervision-java-lambda"

sample_dir=akka-samples/akka-sample-main-java-lambda
tmp="$script_dir/../../$sample_dir"
try cd  "$tmp" "can't step into project directory: $tmp"
export JAVA_HOME="$java8_home"
try mvn clean compile exec:java -Dexec.mainClass="akka.Main" -Dexec.args="sample.hello.HelloWorld" "mvn execution in $sample_dir failed"
try mvn exec:java -Dexec.mainClass="sample.hello.Main2" "mvn execution in $sample_dir failed"