package

#!/bin/bash

# [OPTIONS]
# --main-class or -mc <class>       : Set main class
# --war or -w                       : Package as war
# --verbose or -v                   : Print all logs
#
# [EXIT CODES]
# 0     : Success
# 1     : Compile Error
# 2     : Invalid Argument
# 3     : Unknown Option
# 4     : Invalid Dependency

optwar=0
optverbose=0
dep_group=""
dep_artifact=""
dep_version=""
dep_scope=""
dep_config=""
dep_group_path=""
dep_dir=""
dep_jar=""
dep_pom=""
dep_download_root=""
remote_repo="https://repo1.maven.org/maven2"

info() {
  if [ $optverbose -ne 0 ]; then
    echo "[INFO] $1"
  fi
}

error() {
  echo "[ERROR] $1" >&2
}

parse_dependency() {
  dep_group=$(xmlstarlet sel -t -v "$1/groupId" $2)
  dep_artifact=$(xmlstarlet sel -t -v "$1/artifactId" $2)
  dep_version=$(xmlstarlet sel -t -v "$1/version" $2)
  dep_scope=$(xmlstarlet sel -t -v "$1/scope" $2)
  dep_group_path=${dep_group//.//}
  dep_dir="repository/$dep_group_path/$dep_artifact/$dep_version"
  dep_jar="$dep_artifact-$dep_version.jar"
  dep_pom="$dep_artifact-$dep_version.pom"
  dep_download_root="$remote_repo/$dep_group_path/$dep_artifact/$dep_version"
}

keep() {
  buf_dep_group=$dep_group
  buf_dep_artifact=$dep_artifact
  buf_dep_version=$dep_version
  buf_dep_group_path=$dep_group_path
  buf_dep_dir=$dep_dir
  buf_dep_jar=$dep_jar
  buf_dep_pom=$dep_pom
  buf_dep_download_root=$dep_download_root
}

restore() {
  dep_group=$buf_dep_group
  dep_artifact=$buf_dep_artifact
  dep_version=$buf_dep_version
  dep_group_path=$buf_dep_group_path
  dep_dir=$buf_dep_dir
  dep_jar=$buf_dep_jar
  dep_pom=$buf_dep_pom
  dep_download_root=$buf_dep_download_root
}

load_props() {
  keep
  parse_dependency "project/parent" "$dep_dir/$dep_pom"
  restore
}


# Get Options
while [ "$1" != "" ]; do
  if [ "$1" == "--main-class" -o "$1" == "-mc" ]; then
    shift
    optmc="--main-class $1"
  elif [ "$1" == "--war" -o "$1" == "-w" ]; then
    optwar=1
  elif [ "$1" == "--verbose" -o "$1" == "-v" ]; then
    optverbose=1
  elif [[ "$1" == -* ]]; then
    error "unknown option '$1'"
    exit 3
  else
    module=$1
    break
  fi
  shift
done


# Get Module Name
if [ "$module" == "" ]; then
  error "module name must be given."
  echo "Usage: package <module>"
  exit 2
fi

info "packaging module '$module'"


# Set Pathes
if [ $optwar -eq 0 ]; then
  info "packaging jar"
  classpath=target/classes/$module
  root=target/classes/$module
  dep_root=repository
  ext=jar
else
  info "packaging war"
  classpath=target/webapp/$module/WEB-INF/classes
  root=target/webapp/$module
  dep_root=target/webapp/$module/WEB-INF/lib
  ext=war

  webapp_dir=src/$module/webapp
  if [ ! -d $webapp_dir ]; then
    error "webapp directory does not exsists."
    exit 4
  fi

  mkdir -p $root
  cp -R src/$module/webapp/ $root
fi


if [ $optwar -eq 1 ]; then
  rm -rf $dep_root
fi


# Resolve Dependencies
dep_config="src/$module/config/dependencies.xml"

if [ -e $dep_config ]; then
  mkdir -p $dep_root
  index=1

  parse_dependency $index
  while [ "$dep_group" != "" ]; do
    dep_group_path=${dep_group//.//}
    dep_dir="repository/$dep_group_path/$dep_artifact/$dep_version"
    dep_jar="$dep_artifact-$dep_version.jar"
    dep_pom="$dep_artifact-$dep_version.pom"
    info "dep_dir: $dep_dir"

    create_index $dep_pom

    if [ ! -e "$dep_dir/$dep_jar" ]; then
      info "dependency not found '$dep_dir/$dep_jar'"
      mkdir -p $dep_dir
      download_url="$dep_download_root/$dep_jar"
      wget -O "$dep_dir/$dep_jar" "$download_url"

      if [ $? -eq 8 ]; then
        error "Dependency not found: '$download_url'"
        exit 5
      fi
    fi

    if [ $optwar -eq 1 ]; then
      cp $dep_dir/$dep_jar $dep_root
    fi

    ((index++))
    parse_dependency $index
  done
fi


# Compilation
java_files=$(find src/$module/java -name *.java)
dep_jars=$(find $dep_root -type f)
dep_jars=${dep_jars//$'\n'/:}
info "dep_jars: $dep_jars"
javac -d $classpath -cp "$dep_jars" $java_files

resources_dir=src/$module/resources
if [ -d $resources_dir ]; then
  cp -R $resources_dir/ $classpath
fi

if [ $? -ne 0 ]; then
  error "compilation failed."
  exit 1
fi

info "compilation completed."


# Packaging
jar --create --file target/$module.$ext $optmc -C $root .

info "archiving completed."