#!/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
#*******************************************************************************
#

# TODO: this script is called with repoScript=$( echo $SCRIPT_PATH/git-submodule-checkout.sh )
# so any echo messages and exit codes are being "eaten" by the eval clause.
# But, not sure it needs to be evaled for repoScript?
# If needed, will need to write to "buildFailed_ type of file, then check for that file
# after its called. But, for now, will write to TRACE_OUTPUT

REPOSITORIES_TXT="$1"; shift
name="$1"; shift

VAL=$( grep "^${name}:" "$REPOSITORIES_TXT" | cut -f2 -d" ")

# Here we count on $BUILD_TYPE being exported. TODO: make parameter later?
if [[ -n "$BUILD_TYPE" && "$BUILD_TYPE" == "N" ]]
then
  if [[ "master" != $VAL ]]
  then
    echo "INFO: Branch forced to 'master', instead of '$VAL', since doing N-Build" >> ${TRACE_OUTPUT}
    VAL="master"
  fi
fi


if [ -z "$VAL" ]; then
  echo "WARNING: No tag or branch specified for $name in repositories_${PATCH_OR_BRANCH_LABEL}.txt" >> ${TRACE_OUTPUT}
  echo "   Has a submodule been added? Perhaps just commented out?" >> ${TRACE_OUTPUT}
  echo "   Will use what ever was last added to aggregator"  >> ${TRACE_OUTPUT}
  # is this ever an error?
  exit
fi

# always fetch before checkout, to be sure new
# branches are in local repo (in case we are switching
# to a new branch or tag).
git fetch
RC=$?
if [[ $RC != 0 ]]
then
  echo "ERROR: Return code of $RC during fetch of $name repository" >> ${TRACE_OUTPUT}
  exit $RC
fi

if [ -z "$(git tag -l $VAL)" ]; then
  echo Updating branch $VAL
  git checkout $VAL
  RC=$?
  if [[ $RC != 0 ]]
  then
    echo "ERROR: Return code of $RC during checkout of $VAL for repository $name" >> ${TRACE_OUTPUT}
    exit $RC
  fi
  git pull
  RC=$?
  if [[ $RC != 0 ]]
  then
    echo "ERROR: Return code of $RC during pull for repository $name" >> ${TRACE_OUTPUT}
    exit $RC
  fi
else
  echo Updating to tag $VAL
  git checkout $VAL
  RC=$?
  if [[ $RC != 0 ]]
  then
    echo "ERROR: Return code of $RC during checkout of $VAL for repository $name" >> ${TRACE_OUTPUT}
    exit $RC
  fi
fi