#!/bin/bash
set -euo pipefail

#
# A (too) old version of JDK8 is installed by default on Travis.
# This method is preferred over Travis apt oracle-java8-installer because
# JDK is kept in cache. It does not need to be downloaded from Oracle
# at each build.
#
function installJdk8 {
  echo "Setup JDK 1.8u131"
  mkdir -p ~/jvm
  pushd ~/jvm > /dev/null
  if [ ! -d "jdk1.8.0_131" ]; then
    wget -c --header "Cookie: oraclelicense=accept-securebackup-cookie" http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.tar.gz
    tar xzf jdk-8u131-linux-x64.tar.gz
    rm jdk-8u131-linux-x64.tar.gz
  fi
  popd > /dev/null
  export JAVA_HOME=~/jvm/jdk1.8.0_131
  export PATH=$JAVA_HOME/bin:$PATH
}

#
# Maven 3.2.5 is installed by default on Travis. Maven 3.3.9 is preferred.
#
function installMaven {
  echo "Setup Maven"
  mkdir -p ~/maven
  pushd ~/maven > /dev/null
  if [ ! -d "apache-maven-3.3.9" ]; then
    echo "Download Maven 3.3.9"
    curl -sSL http://apache.mirrors.ovh.net/ftp.apache.org/dist/maven/maven-3/3.3.9/binaries/apache-maven-3.3.9-bin.tar.gz | tar zx -C ~/maven
  fi
  popd > /dev/null
  export M2_HOME=~/maven/apache-maven-3.3.9
  export PATH=$M2_HOME/bin:$PATH
}

#
# Replaces the version defined in sources, usually x.y-SNAPSHOT,
# by a version identifying the build.
# The build version is composed of 4 fields, including the semantic version and
# the build number provided by Travis.
#
# Exported variables:
# - INITIAL_VERSION: version as defined in pom.xml
# - BUILD_VERSION: version including the build number
# - PROJECT_VERSION: target Maven version. The name of this variable is important because
#   it's used by QA when extracting version from Artifactory build info.
#
# Example of SNAPSHOT
# INITIAL_VERSION=6.3-SNAPSHOT
# BUILD_VERSION=6.3.0.12345
# PROJECT_VERSION=6.3.0.12345
#
# Example of RC
# INITIAL_VERSION=6.3-RC1
# BUILD_VERSION=6.3.0.12345
# PROJECT_VERSION=6.3-RC1
#
# Example of GA
# INITIAL_VERSION=6.3
# BUILD_VERSION=6.3.0.12345
# PROJECT_VERSION=6.3
#
function fixBuildVersion {
  export INITIAL_VERSION=`maven_expression "project.version"`

  # remove suffix -SNAPSHOT or -RC
  without_suffix=`echo $INITIAL_VERSION | sed "s/-.*//g"`

  IFS=$'.'
  fields_count=`echo $without_suffix | wc -w`
  unset IFS
  if [ $fields_count -lt 3 ]; then
    export BUILD_VERSION="$without_suffix.0.$TRAVIS_BUILD_NUMBER"
  else
    export BUILD_VERSION="$without_suffix.$TRAVIS_BUILD_NUMBER"
  fi

  if [[ "${INITIAL_VERSION}" == *"-SNAPSHOT" ]]; then
    # SNAPSHOT
    export PROJECT_VERSION=$BUILD_VERSION
    mvn org.codehaus.mojo:versions-maven-plugin:2.2:set -DnewVersion=$PROJECT_VERSION -DgenerateBackupPoms=false -B -e
  else
    # not a SNAPSHOT: milestone, RC or GA
    export PROJECT_VERSION=$INITIAL_VERSION
  fi

  echo "Build Version  : $BUILD_VERSION"
  echo "Project Version: $PROJECT_VERSION"
}

#
# Configure Maven settings and install some script utilities
#
function configureTravis {
  mkdir -p ~/.local
  curl -sSL https://github.com/SonarSource/travis-utils/tarball/v36 | tar zx --strip-components 1 -C ~/.local
  source ~/.local/bin/install
}
configureTravis

# When pull request exists on the branch, then the job related to the branch does not need
# to be executed and should be canceled. It does not book slaves for nothing.
# @TravisCI please provide the feature natively, like at AppVeyor or CircleCI ;-)
cancel_branch_build_with_pr

case "$TARGET" in

BUILD)

  installJdk8
  installMaven
  fixBuildVersion

  # Minimal Maven settings
  export MAVEN_OPTS="-Xmx1G -Xms128m"
  MAVEN_ARGS="-T 1C -Dmaven.test.redirectTestOutputToFile=false -Dsurefire.useFile=false -B -e -V -DbuildVersion=$BUILD_VERSION"

  if [ "$TRAVIS_BRANCH" == "master" ] && [ "$TRAVIS_PULL_REQUEST" == "false" ]; then
    echo 'Build and analyze master'

    # Fetch all commit history so that SonarQube has exact blame information
    # for issue auto-assignment
    # This command can fail with "fatal: --unshallow on a complete repository does not make sense"
    # if there are not enough commits in the Git repository (even if Travis executed git clone --depth 50).
    # For this reason errors are ignored with "|| true"
    git fetch --unshallow || true

    mvn org.jacoco:jacoco-maven-plugin:prepare-agent deploy \
          $MAVEN_ARGS \
          -Pdeploy-sonarsource,release
    mvn sonar:sonar \
          -Dsonar.host.url=$SONAR_HOST_URL \
          -Dsonar.login=$SONAR_TOKEN \
          -Dsonar.projectVersion=$INITIAL_VERSION


  elif [[ "$TRAVIS_BRANCH" == "branch-"* ]] && [ "$TRAVIS_PULL_REQUEST" == "false" ]; then
    echo 'Build release branch'

    mvn deploy $MAVEN_ARGS -Pdeploy-sonarsource,release

  elif [ "$TRAVIS_PULL_REQUEST" != "false" ] && [ -n "${GITHUB_TOKEN:-}" ]; then
    echo 'Build and analyze internal pull request'

    mvn org.jacoco:jacoco-maven-plugin:prepare-agent deploy \
        $MAVEN_ARGS \
        -Dsource.skip=true \
        -Pdeploy-sonarsource
    mvn sonar:sonar \
        -Dsonar.analysis.mode=preview \
        -Dsonar.github.pullRequest=$TRAVIS_PULL_REQUEST \
        -Dsonar.github.repository=$TRAVIS_REPO_SLUG \
        -Dsonar.github.oauth=$GITHUB_TOKEN \
        -Dsonar.host.url=$SONAR_HOST_URL \
        -Dsonar.login=$SONAR_TOKEN

  else
    echo 'Build feature branch or external pull request'

    mvn install $MAVEN_ARGS -Dsource.skip=true
  fi

  ./run-integration-tests.sh "Lite" ""
  ;;

WEB_TESTS)
  set +u
  source ~/.nvm/nvm.sh && nvm install 6
  curl -o- -L https://yarnpkg.com/install.sh | bash
  export PATH=$HOME/.yarn/bin:$PATH
  cd server/sonar-web && yarn && yarn validate
  ;;

*)
  echo "Unexpected TARGET value: $TARGET"
  exit 1
  ;;

esac