#! /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.

LCOV=${LCOV:-lcov}
GENHTML=${GENHTML:-genhtml}

TMPDIR=${TMPDIR:-/tmp}
BUILDID="org.apache.trafficserver.$$"

SRCROOT=${SRCROOT:-$(cd $(dirname $0)/.. && pwd)} # where the source lives
OBJROOT=${OBJROOT:-"$TMPDIR/$BUILDID/obj"} # where we are building
DSTROOT=${DSTROOT:-"$TMPDIR/$BUILDID/dst"} # where we are installing

# Force low make parallelization so that the build can complete in a VM with
# only a small amount of memory.
NPROCS=${NPROCS:-2}

mkdir -p $SRCROOT
mkdir -p $OBJROOT
mkdir -p $DSTROOT

autogen() {
  (
    cd "$SRCROOT"
    [ configure -nt configure.ac -a Makefile.in -nt Makefile.am ] || autoreconf -fi
  )
}

configure() {
  (
    cd $OBJROOT
    $SRCROOT/configure \
      --prefix=$DSTROOT \
      --enable-debug \
      --enable-coverage \
      --enable-werror \
      --enable-example-plugins \
      --enable-test-tools \
      --enable-experimental-plugins \
      CC="$CC" \
      CXX="$CXX" \
      "$@"
  )
}

build() {
  ( cd $OBJROOT && $MAKE -j $NPROCS )
  ( cd $OBJROOT && $MAKE install )
}

regress() {
  ( cd $OBJROOT && $MAKE check ) && \
  $DSTROOT/bin/traffic_server -k -K -R 1
}

CC=${CC:-gcc}
CXX=${CXX:-g++}
MAKE=${MAKE:-make}
export CC CXX MAKE

case $VERBOSE in
  Y*) set -x ;;
  y*) set -x ;;
  1) set -x ;;
  *) set +x ;;
esac

autogen || exit 1
configure "$@" || exit 1
build || exit 1

$LCOV --quiet --capture --initial --directory $OBJROOT --output-file initial.info

regress

$LCOV --quiet --capture --directory $OBJROOT --output-file tests.info

# The --add-tracefile option refuses to create an output file with
# --output-file (contrary to documentation). Capture the combined
# coverage from stdout instead.
$LCOV \
  --add-tracefile initial.info \
  --add-tracefile tests.info \
> combined.info

# genhtml will puke because it can't find the original TSConfig files.
# We don't need to bother generation anything for /usr/include.
$LCOV --remove combined.info \
  'TsConfigSyntax.*' \
  'TsConfigGrammar.*' \
  '/usr/include/*' > coverage.info

$GENHTML --output-directory coverage.html coverage.info