#!/usr/bin/env bash
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

if [[ -z "${BASH_VERSINFO[0]}" ]] \
   || [[ "${BASH_VERSINFO[0]}" -lt 3 ]] \
   || [[ "${BASH_VERSINFO[0]}" -eq 3 && "${BASH_VERSINFO[1]}" -lt 2 ]]; then
  echo "bash v3.2+ is required. Sorry."
  exit 1
fi

function centered_text
{
  local text="$*"
  local spacing=$(( (75+${#text}) /2 ))
  printf "%*s\n"  ${spacing} "${text}"
}

function big_console_header
{
  printf "\n\n"
  echo "****************************************************************************"
  centered_text "${@}"
  echo "****************************************************************************"
  printf "\n\n"
}

## @description  Given a filename or dir, return the absolute version of it
## @audience     public
## @stability    stable
## @param        directory
## @replaceable  no
## @return       0 success
## @return       1 failure
## @return       stdout abspath
function hadoop_abs
{
  declare obj=$1
  declare dir
  declare fn

  if [[ ! -e ${obj} ]]; then
    return 1
  elif [[ -d ${obj} ]]; then
    dir=${obj}
  else
    dir=$(dirname -- "${obj}")
    fn=$(basename -- "${obj}")
    fn="/${fn}"
  fi

  dir=$(cd -P -- "${dir}" >/dev/null 2>/dev/null && pwd -P)
  if [[ $? = 0 ]]; then
    echo "${dir}${fn}"
    return 0
  fi
  return 1
}

## @description  Print a message to stderr
## @audience     public
## @stability    stable
## @replaceable  no
## @param        string
function hadoop_error
{
  echo "$*" 1>&2
}


function run_and_redirect
{
  declare logfile=$1
  shift
  declare res

  echo "\$ ${*} > ${logfile} 2>&1"
  # to the log
  {
    date
    echo "cd $(pwd)"
    echo "${*}"
  } > "${logfile}"
  # run the actual command
  "${@}" >> "${logfile}" 2>&1
  res=$?
  if [[ ${res} != 0 ]]; then
    echo
    echo "Failed!"
    echo
    exit "${res}"
  fi
}

function hadoop_native_flags
{

  # modified version of the Yetus personality

  if [[ ${NATIVE} != true ]]; then
    return
  fi

  # Based upon HADOOP-11937
  #
  # Some notes:
  #
  # - getting fuse to compile on anything but Linux
  #   is always tricky.
  # - Darwin assumes homebrew is in use.
  # - HADOOP-12027 required for bzip2 on OS X.
  # - bzip2 is broken in lots of places.
  #   e.g, HADOOP-12027 for OS X. so no -Drequire.bzip2
  #

  case "${OSNAME}" in
    Linux)
      # shellcheck disable=SC2086
      echo -Pnative -Drequire.snappy -Drequire.openssl -Drequire.fuse
    ;;
    Darwin)
      echo \
      -Pnative -Drequire.snappy  \
      -Drequire.openssl \
        -Dopenssl.prefix=/usr/local/opt/openssl/ \
        -Dopenssl.include=/usr/local/opt/openssl/include \
        -Dopenssl.lib=/usr/local/opt/openssl/lib
    ;;
    *)
      # shellcheck disable=SC2086
      echo \
        -Pnative \
        -Drequire.snappy -Drequire.openssl \
        -Drequire.test.libhadoop
    ;;
  esac
}

# Function to probe the exit code of the script commands,
# and stop in the case of failure with an contextual error
# message.
function run()
{
  declare res
  declare logfile

  echo "\$ ${*}"
  "${@}"
  res=$?
  if [[ ${res} != 0 ]]; then
    echo
    echo "Failed!"
    echo
    exit "${res}"
  fi
}

function domd5()
{
  run "${MD5SUM}" "${1}" > "${1}.md5"
}

## @description  set JAVA_HOME properly
## @audience     public
## @stability    unstable
function locate_jvm()
{
  JAVA_HOME="$(ls -d /usr/lib/jvm/*${JVM_VERSION}* | grep "${JVM_HINT}" | head -1 )"
  export JAVA_HOME
}

function header()
{
  echo
  printf "\n\n"
  echo "============================================================================"
  echo "============================================================================"
  centered_text "Hadoop Release Creator"
  echo "============================================================================"
  echo "============================================================================"
  printf "\n\n"
  echo "Version to create      : ${HADOOP_VERSION}"
  echo "Release Candidate Label: ${RC_LABEL##-}"
  echo "Source Version         : ${DEFAULT_HADOOP_VERSION}"
  echo "Using JDK              : ${JAVA_HOME}"
  printf "\n\n"
}

function set_defaults
{
  BINDIR=$(dirname "${BIN}")
  BASEDIR=$(hadoop_abs "${BINDIR}/../..")

  ARTIFACTS_DIR="${BASEDIR}/target/artifacts"

  # Extract Hadoop version from ${BASEDIR}/pom.xml
  DEFAULT_HADOOP_VERSION=$(grep "<version>" "${BASEDIR}/pom.xml" \
    | head -1 \
    | sed  -e 's|^ *<version>||' -e 's|</version>.*$||')

  DOCKER=false
  DOCKERCACHE=false
  DOCKERFILE="${BASEDIR}/dev-support/docker/Dockerfile"
  DOCKERRAN=false

  # Extract Java version from ${BASEDIR}/pom.xml
  # doing this outside of maven means we can do this before
  # the docker container comes up...
  JVM_VERSION=$(grep "<javac.version>" "${BASEDIR}/hadoop-project/pom.xml" \
    | head -1 \
    | sed  -e 's|^ *<javac.version>||' -e 's|</javac.version>.*$||' -e 's|..||')

  GIT=$(command -v git)

  GPG=$(command -v gpg)
  GPGAGENT=$(command -v gpg-agent)

  HADOOP_VERSION="${DEFAULT_HADOOP_VERSION}"

  INDOCKER=false

  LOGDIR="${BASEDIR}/patchprocess"

  if [[ -z "${MVN}" ]]; then
    if [[ -n "${MAVEN_HOME}" ]]; then
      MVN=${MAVEN_HOME}/bin/mvn
    else
      MVN=$(command -v mvn)
    fi
  fi

  MD5SUM=$(command -v md5sum)
  if [[ -z "${MD5SUM}" ]]; then
    MD5SUM=$(command -v md5)
  fi

  NATIVE=false
  OSNAME=$(uname -s)

  PUBKEYFILE="https://dist.apache.org/repos/dist/release/hadoop/common/KEYS"

  SIGN=false
}

function startgpgagent
{
  if [[ "${SIGN}" = true ]]; then
    if [[ -n "${GPGAGENT}" && -z "${GPG_AGENT_INFO}" ]]; then
      echo "starting gpg agent"
      echo "default-cache-ttl 14400" > "${LOGDIR}/gpgagent.conf"
      # shellcheck disable=2046
      eval $("${GPGAGENT}" --daemon \
        --options "${LOGDIR}/gpgagent.conf" \
        --log-file="${LOGDIR}/create-release-gpgagent.log")
      GPGAGENTPID=$(echo "${GPG_AGENT_INFO}" | cut -f 2 -d:)
    fi

    if [[ -n "${GPG_AGENT_INFO}" ]]; then
      echo "Warming the gpg-agent cache prior to calling maven"
      # warm the agent's cache:
      touch "${LOGDIR}/warm"
      ${GPG} --use-agent --armor --output "${LOGDIR}/warm.asc" --detach-sig "${LOGDIR}/warm"
      rm "${LOGDIR}/warm.asc" "${LOGDIR}/warm"
    else
      SIGN=false
      hadoop_error "ERROR: Unable to launch or acquire gpg-agent. Disable signing."
    fi
  fi
}

function stopgpgagent
{
  if [[ -n "${GPGAGENTPID}" ]]; then
    kill "${GPGAGENTPID}"
  fi
}

function usage
{
  echo "--artifactsdir=[path]   Path to use to store release bits"
  echo "--asfrelease            Make an ASF release"
  echo "--docker                Use Hadoop's Dockerfile for guaranteed environment"
  echo "--dockercache           Use a Docker-private maven cache"
  echo "--jvmhint=[filter]      Simple filter to pick a JVM to use"
  echo "--logdir=[path]         Path to store logs"
  echo "--mvncache=[path]       Path to the maven cache to use"
  echo "--native                Also build the native components"
  echo "--rc-label=[label]      Add this label to the builds"
  echo "--sign                  Use .gnupg dir to sign the artifacts and jars"
  echo "--version=[version]     Use an alternative version string"
}

function option_parse
{
  declare i

  for i in "$@"; do
    case ${i} in
      --asfrelease)
        ASFRELEASE=true
        NATIVE=true
        SIGN=true
      ;;
      --artifactsdir=*)
        ARTIFACTS_DIR=${i#*=}
      ;;
      --docker)
        DOCKER=true
      ;;
      --dockercache)
        DOCKERCACHE=true
      ;;
      --help)
        usage
        exit
      ;;
      --indocker)
        INDOCKER=true
      ;;
      --jvmhint=*)
        JVM_HINT=${i#*=}
      ;;
      --logdir=*)
        LOGDIR=${i#*=}
      ;;
      --mvncache=*)
        MVNCACHE=${i#*=}
      ;;
      --native)
        NATIVE=true
      ;;
      --rc-label=*)
        RC_LABEL=${i#*=}
      ;;
      --sign)
        SIGN=true
      ;;
      --version=*)
        HADOOP_VERSION=${i#*=}
      ;;
    esac
  done

  if [[ ! -d "${HOME}/.gnupg" ]]; then
    hadoop_error "ERROR: No .gnupg dir. Disabling signing capability."
    SIGN=false
  fi

  if [[ "${SIGN}" = true ]]; then
    if [[ -n "${GPG_AGENT_INFO}" ]]; then
      echo "NOTE: Using existing gpg-agent. If the default-cache-ttl"
      echo "is set to less than ~20 mins, maven commands will fail."
    elif [[ -z "${GPGAGENT}" ]]; then
      hadoop_error "ERROR: No gpg-agent. Disabling signing capability."
      SIGN=false
    fi
  fi

  DOCKERCMD=$(command -v docker)
  if [[ "${DOCKER}" = true && -z "${DOCKERCMD}" ]]; then
      hadoop_error "ERROR: docker binary not found. Disabling docker mode."
      DOCKER=false
  fi

  if [[ "${DOCKERCACHE}" = true && "${DOCKER}" = false ]]; then
    if [[ "${INDOCKER}" = false ]]; then
      hadoop_error "ERROR: docker mode not enabled. Disabling dockercache."
    fi
    DOCKERCACHE=false
  fi

  if [[ "${DOCKERCACHE}" = true && -n "${MVNCACHE}" ]]; then
    hadoop_error "ERROR: Cannot set --mvncache and --dockercache simultaneously."
    exit 1
  else
    MVNCACHE=${MVNCACHE:-"${HOME}/.m2"}
  fi

  if [[ "${ASFRELEASE}" = true ]]; then
    if [[ "${SIGN}" = false ]]; then
      hadoop_error "ERROR: --asfrelease requires --sign. Exiting."
      exit 1
    fi

    if [[ "${OSNAME}" = Linux ]]; then
      if [[ "${DOCKER}" = false && "${INDOCKER}" = false ]]; then
        hadoop_error "ERROR: --asfrelease requires --docker on Linux. Exiting."
        exit 1
      elif [[ "${DOCKERCACHE}" = false && "${INDOCKER}" = false ]]; then
        hadoop_error "ERROR: --asfrelease on Linux requires --dockercache. Exiting."
        exit 1
      fi
    fi
  fi

  if [[ -n "${MVNCACHE}" ]]; then
    mkdir -p "${MVNCACHE}"
    if [[ -d "${MVNCACHE}" ]]; then
      MVN_ARGS=("-Dmaven.repo.local=${MVNCACHE}")
    fi
  fi
}

function dockermode
{
  declare lines
  declare -a modp
  declare imgname
  declare -a extrad
  declare user_name
  declare group_id

  if [[ "${DOCKER}" != true ]]; then
    return
  fi

  user_name=${SUDO_USER:=$USER}
  user_id=$(id -u "${user_name}")
  group_id=$(id -g "${user_name}")

  imgname="hadoop/createrelease:${HADOOP_VERSION}_${RANDOM}"

  if [[ -d "${HOME}/.gnupg" ]]; then
    extrad+=("-v" "${HOME}/.gnupg:/home/${user_name}/.gnupg")
  fi

  if [[ -n "${LOGDIR}" ]]; then
    if [[ ! -d "${LOGDIR}" ]]; then
      mkdir -p "${LOGDIR}"
    fi
    lines=$(hadoop_abs "${LOGDIR}")
    extrad+=("-v" "${lines}:${lines}")
  fi

  if [[ -n "${ARTIFACTS_DIR}" ]]; then
    if [[ ! -d "${ARTIFACTS_DIR}" ]]; then
      mkdir -p "${ARTIFACTS_DIR}"
    fi
    lines=$(hadoop_abs "${ARTIFACTS_DIR}")
    extrad+=("-v" "${lines}:${lines}")
  fi

  if [[ "${DOCKERCACHE}" = true ]]; then
    modp+=("--mvncache=/maven")
  else
    lines=$(hadoop_abs "${MVNCACHE}")
    extrad+=("-v" "${lines}:${lines}")
  fi

  for lines in "${PARAMS[@]}"; do
    if [[ "${lines}" != "--docker" ]]; then
      modp+=("$lines")
    fi
  done

  modp+=("--indocker")

  (
    lines=$(grep -n 'YETUS CUT HERE' "${DOCKERFILE}" | cut -f1 -d:)
    if [[ -z "${lines}" ]]; then
      cat "${DOCKERFILE}"
    else
      head -n "${lines}" "${DOCKERFILE}"
    fi
    # make sure we put some space between, just in case last
    # line isn't an empty line or whatever
    printf "\n\n"

    # force a new image for every run to make it easier to remove later
    echo "LABEL org.apache.hadoop.create-release=\"cr-${RANDOM}\""

    # setup ownerships, etc
    echo "RUN groupadd --non-unique -g ${group_id} ${user_name}"
    echo "RUN useradd -g ${group_id} -u ${user_id} -m ${user_name}"
    echo "RUN chown -R ${user_name} /home/${user_name}"
    echo "ENV HOME /home/${user_name}"
    echo "RUN mkdir -p /maven"
    echo "RUN chown -R ${user_name} /maven"

    echo "USER ${user_name}"
    printf "\n\n"
  ) | docker build -t "${imgname}" -

  run docker run -i -t \
    --privileged \
    "${extrad[@]}"  \
    -v "${BASEDIR}:/build/source" \
    -u "${user_name}" \
    -w "/build/source" \
    "${imgname}" \
    "/build/source/dev-support/bin/create-release" "${modp[@]}"

  DOCKERRAN=true
}

function makearelease
{
  # let's start at the root
  run cd "${BASEDIR}"

  big_console_header "Cleaning the Source Tree"

  # git clean to clear any remnants from previous build
  run "${GIT}" clean -xdf

  mkdir -p "${LOGDIR}"

  # Install the Hadoop maven plugins first
  run_and_redirect "${LOGDIR}/mvn_install_maven_plugins.log" "${MVN}" "${MVN_ARGS[@]}" -pl hadoop-maven-plugins -am clean install

  # mvn clean for sanity
  run_and_redirect "${LOGDIR}/mvn_clean.log" "${MVN}" "${MVN_ARGS[@]}" clean

  # Create staging dir for release artifacts
  run mkdir -p "${ARTIFACTS_DIR}"

  big_console_header "Apache RAT Check"

  # Create RAT report
  run_and_redirect "${LOGDIR}/mvn_apache_rat.log" "${MVN}" "${MVN_ARGS[@]}" apache-rat:check

  big_console_header "Maven Build and Install"

  if [[ "${SIGN}" = true ]]; then
    signflags=("-Psign" "-Dgpg.useagent=true" -Dgpg.executable="${GPG}")
  fi

  # Create SRC and BIN tarballs for release,
  # shellcheck disable=SC2046
  run_and_redirect "${LOGDIR}/mvn_install.log" \
    "${MVN}" "${MVN_ARGS[@]}" install \
      -Pdist,src \
      "${signflags[@]}" \
      -DskipTests -Dtar $(hadoop_native_flags)

  # Create site for release
  # we need to do install again so that jdiff and
  # a few other things get registered in the maven
  # universe correctly
  run_and_redirect "${LOGDIR}/mvn_site.log" \
    "${MVN}" "${MVN_ARGS[@]}" install \
      site site:stage \
      -DskipTests \
      -Pdist,src,releasedocs,docs

  big_console_header "Staging the release"

  run mv "${BASEDIR}/target/staging/hadoop-project" "${BASEDIR}/target/r${HADOOP_VERSION}/"
  run cd "${BASEDIR}/target/"
  run tar czpf "hadoop-site-${HADOOP_VERSION}.tar.gz" "r${HADOOP_VERSION}"/*
  run cd "${BASEDIR}"

  # Stage RAT report
  #shellcheck disable=SC2038
  find . -name rat.txt | xargs -I% cat % > "${ARTIFACTS_DIR}/hadoop-${HADOOP_VERSION}${RC_LABEL}-rat.txt"

  # Stage CHANGES and RELEASENOTES files
  for i in CHANGES RELEASENOTES; do
    run cp -p \
        "${BASEDIR}/hadoop-common-project/hadoop-common/src/site/markdown/release/${HADOOP_VERSION}"/${i}*.md \
        "${ARTIFACTS_DIR}/${i}.md"
  done

  # Prepare and stage BIN tarball
  run cd "${BASEDIR}/hadoop-dist/target/"
  run tar -xzpf "hadoop-${HADOOP_VERSION}.tar.gz"
  run mkdir -p "hadoop-${HADOOP_VERSION}/share/doc/hadoop/"
  run cp -r "${BASEDIR}/target/r${HADOOP_VERSION}"/* "hadoop-${HADOOP_VERSION}/share/doc/hadoop/"
  run tar -czpf "hadoop-${HADOOP_VERSION}.tar.gz" "hadoop-${HADOOP_VERSION}"
  run cd "${BASEDIR}"
  run mv \
    "${BASEDIR}/hadoop-dist/target/hadoop-${HADOOP_VERSION}.tar.gz" \
    "${ARTIFACTS_DIR}/hadoop-${HADOOP_VERSION}${RC_LABEL}.tar.gz"

  # Stage SRC tarball
  run mv \
    "${BASEDIR}/hadoop-dist/target/hadoop-${HADOOP_VERSION}-src.tar.gz" \
    "${ARTIFACTS_DIR}/hadoop-${HADOOP_VERSION}${RC_LABEL}-src.tar.gz"

  # Stage SITE tarball
  run mv \
     "${BASEDIR}/target/hadoop-site-${HADOOP_VERSION}.tar.gz" \
    "${ARTIFACTS_DIR}/hadoop-${HADOOP_VERSION}${RC_LABEL}-site.tar.gz"
}

function signartifacts
{
  declare i

  if [[ "${SIGN}" = false ]]; then
    for i in ${ARTIFACTS_DIR}/*; do
      domd5 "${i}"
    done
    echo ""
    echo "Remember to sign the artifacts before staging them on the open"
    echo ""
    return
  fi

  big_console_header "Signing the release"

  for i in ${ARTIFACTS_DIR}/*; do
    ${GPG} --use-agent --armor --output "${i}.asc" --detach-sig "${i}"
    ${GPG} --print-mds "${i}" > "${i}.mds"
    domd5 "${i}"
  done

  if [[ "${ASFRELEASE}" = true ]]; then
    echo "Fetching the Apache Hadoop KEYS file..."
    curl -L "${PUBKEYFILE}" -o "${BASEDIR}/target/KEYS"
    ${GPG} --import --trustdb "${BASEDIR}/target/testkeysdb" "${BASEDIR}/target/KEYS"
    ${GPG} --verify --trustdb "${BASEDIR}/target/testkeysdb" \
      "${ARTIFACTS_DIR}/hadoop-${HADOOP_VERSION}${RC_LABEL}.tar.gz.asc" \
        "${ARTIFACTS_DIR}/hadoop-${HADOOP_VERSION}${RC_LABEL}.tar.gz"
    if [[ $? != 0 ]]; then
      hadoop_error "ERROR: GPG key is not present in ${PUBKEYFILE}."
      hadoop_error "ERROR: This MUST be fixed. Exiting."
      exit 1
    fi
  fi
}

# find root of the source tree
BIN=$(hadoop_abs "${BASH_SOURCE:-$0}")
PARAMS=("$@")

set_defaults

option_parse "${PARAMS[@]}"

dockermode

locate_jvm

header

if [[ -n ${RC_LABEL} ]]; then
  RC_LABEL="-${RC_LABEL}"
fi

if [[ "${INDOCKER}" = true || "${DOCKERRAN}" = false ]]; then

  startgpgagent

  makearelease

  signartifacts

  stopgpgagent
fi

if [[ "${INDOCKER}" = true ]]; then
  exit $?
fi

if [[ $? == 0 ]]; then
  echo
  echo "Congratulations, you have successfully built the release"
  echo "artifacts for Apache Hadoop ${HADOOP_VERSION}${RC_LABEL}"
  echo
  echo "The artifacts for this run are available at ${ARTIFACTS_DIR}:"
  run ls -1 "${ARTIFACTS_DIR}"

  echo
fi