#!/usr/bin/env bash
#*******************************************************************************
# Copyright (c) 2016 IBM Corporation and others.
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Eclipse Public License v1.0
# which accompanies this distribution, and is available at
# http://www.eclipse.org/legal/epl-v10.html
#
# Contributors:
#     David Williams - initial API and implementation
#*******************************************************************************
#

if [ $# -ne 1 ]; then
  echo USAGE: $0 env_file
  touch "${buildDirectory}/buildFailed-get-aggregator"
  exit 1
fi

if [ ! -r "$1" ]; then
  echo "$1" cannot be read
  echo USAGE: $0 env_file
  touch "${buildDirectory}/buildFailed-get-aggregator"
  exit 1
fi

source "$1"

export SCRIPT_PATH=${SCRIPT_PATH:-$(pwd)}

source $SCRIPT_PATH/build-functions.shsource

cd $BUILD_ROOT

# derived values
gitCache=$( fn-git-cache "$BUILD_ROOT" )
aggDir=$( fn-git-dir "$gitCache" "$AGGREGATOR_REPO" )

if [[ -r "$aggDir" ]]
then
  fn-git-clean-aggregator2 "$aggDir" "${BRANCH}"
  RC=$?
  if [[ $RC == 0 ]]
  then
    pushd "$aggDir"
    fn-git-pull
    RC=$?
    if [[ $RC == 0 ]]
    then
      fn-git-submodule-update
      RC=$?
      popd
    fi
  fi
else
  fn-git-clone-aggregator "$gitCache" \
    $(fn-local-repo "$AGGREGATOR_REPO") "${BRANCH}"
  RC=$?
fi

buildDirectory=$( fn-build-dir "$BUILD_ROOT" "$BUILD_ID" "$STREAM" )

if [[ $RC != 0 ]]
then
  # create as "indicator file" ... gets filled in more once there is a log to grep
  touch  "${buildDirectory}/buildFailed-get-aggregator"
  echo "ERROR: get-aggregator returned non-zero return code: $RC"
  echo "       assuming 'master' for EBUILDER_HASH (for later use), since could not reliably get aggregator."
  EBUILDER_HASH=master
  fn-write-property EBUILDER_HASH
  exit $RC
fi


pushd "$aggDir"
# save current hash tag value for documenting build (e.g. to reproduce, run tests, etc.)
EBUILDER_HASH=$( git show-ref --hash --verify refs/remotes/origin/${BRANCH} )
checkForErrorExit $? "git show-ref --hash failed for refs/remotes/origin/${BRANCH}. Not valid ref?"
# remember, literal name as argument ... its defrefernced in function
fn-write-property EBUILDER_HASH
# write to "relengdirectory.txt", as a double check on build input"
# In particular, this "early one" is the "starting point".
# By the time we do a build and commit submodules, there would
# be a different one that is tagged with buildId. I'm thinking it is the latter that would be needed
# to "reproduce a build" but this early one may be important to debug what went wrong with a build.
buildDirectory=$( fn-build-dir "$BUILD_ROOT" "$BUILD_ID" "$STREAM" )

echo "# Build ${BUILD_ID}, ${BUILD_PRETTY_DATE}" > ${logsDirectory}/relengdirectory.txt
echo "# " >> ${logsDirectory}/relengdirectory.txt
echo "# This is a listing of reverse lookup of commits and tags in a build."  >> ${logsDirectory}/relengdirectory.txt
echo "# It is intended to serve as double check or source of debug information if something appears wrong with a build."  >> ${logsDirectory}/relengdirectory.txt
echo "# "  >> ${logsDirectory}/relengdirectory.txt
echo "# Starting point, directing build:" >> ${logsDirectory}/relengdirectory.txt
echo "$AGGREGATOR_REPO $BRANCH $EBUILDER_HASH"  >> ${logsDirectory}/relengdirectory.txt
echo "# " >> ${logsDirectory}/relengdirectory.txt
popd