#!/bin/bash
# This script is used as a single command to run the x-pack-kibana tests.
#
# It will also attempt to install the appropriate version of node.js
# for the Kibana plugin tests using nvm. Set a custom nvm directory using the
# `NVM_DIR` environment variable.
#

# Turn on semi-strict mode
set -e
set -o pipefail

SCRIPT="$0"

# SCRIPT may be an arbitrarily deep series of symlinks. Loop until we have the concrete path.
while [ -h "$SCRIPT" ] ; do
  ls=$(ls -ld "$SCRIPT")
  # Drop everything prior to ->
  link=$(expr "$ls" : '.*-> \(.*\)$')
  if expr "$link" : '/.*' > /dev/null; then
    SCRIPT="$link"
  else
    SCRIPT=$(dirname "$SCRIPT")/"$link"
  fi
done

# determine base directory
BASE_DIR=$(dirname "$SCRIPT")/..

# make BASE_DIR absolute
BASE_DIR=$(cd "$BASE_DIR"; pwd)

PARENT_DIR=$(cd "$BASE_DIR"/..; pwd)

# go to the parent directory
cd $PARENT_DIR

if [ -z ${USE_EXISTING_ES:+x} ]; then
    if [ -d "./elasticsearch" ]; then
        echo "I expected a clean workspace but an 'elasticsearch' sibling directory already exists in [$PARENT_DIR]!"
        echo
        echo "Either define 'USE_EXISTING_ES' or remove the existing 'elasticsearch' sibling."
        exit 1
    fi
    BRANCH=${PR_SOURCE_BRANCH:-${GIT_BRANCH#*/}} # GIT_BRANCH starts with the repo, i.e., origin/master
    BRANCH=${BRANCH:-master} # fall back to CI branch if not testing a PR
    echo "Checking if branch '$BRANCH' has elasticsearch sibling..."
    if [[ -z "$(git ls-remote --heads https://github.com/elastic/elasticsearch.git $BRANCH)" ]]; then
      echo "No sibling branch, using PR target branch"
      BRANCH=$PR_TARGET_BRANCH
    fi
    echo "Checking out Elasticsearch '$BRANCH' branch..."
    git clone -b $BRANCH https://github.com/elastic/elasticsearch.git --depth=1
    printf "Checked out Elasticsearch revision: %s\n" "$(git -C elasticsearch rev-parse HEAD)"
else
    if [ -d "./elasticsearch" ]; then
        echo "Using existing 'elasticsearch' checkout"
    else
        echo "You have defined 'USE_EXISTING_ES' but no existing Elasticsearch directory exists!"
        exit 2
    fi
fi

# back to base directory
cd "$BASE_DIR"

# install the correct node.js version
if [ -z ${NVM_DIR:+x} ]; then
  export NVM_DIR="/var/lib/jenkins/.nvm";
fi

NVM_SCRIPT="$NVM_DIR/nvm.sh"
if [ -s "$NVM_SCRIPT" ]; then
  . "$NVM_SCRIPT"  # load nvm
else
  echo "Unable to find the nvm script at \"$NVM_SCRIPT\""
  exit 1
fi

echo "Installing node.js version $(cat .node-version)..."
nvm install "$(cat .node-version)"

echo "Running x-pack-kibana tests..."
echo "Running in $PWD"

# output the commands
set -xuf

# clean
gradle --stacktrace clean

# Actually run the tests
gradle check

# ~*~ shell-script-mode ~*~