#!/bin/bash
#set -x

: ${CXX:=g++}
: ${CTORDIR:=../../build}
: ${BUILDDIR:=build}

CXX=$(which $CXX)

function fail
{
		echo "*** Failure at line $1"
		exit 1
}

function ctor
{
		echo "*** Running: ./ctor $*"
		./ctor $*
}

# Wipe the board
rm -Rf ${BUILDDIR}
rm -f configuration.cc
rm -f ctor

echo "** ctor_files/ctor.cc.base"
cp ctor_files/ctor.cc.base ctor.cc

# Compile bootstrap binary
$CXX -pthread -std=c++20 -L${CTORDIR} -lctor -I../../src ctor.cc -o ctor || fail ${LINENO}

# No build files should have been created yet
[ -d ${BUILDDIR} ] && fail ${LINENO}

# capture md5 sum of ctor binary before configure is called
MD5=`md5sum ctor`
ctor configure --ctor-includedir ../../src --ctor-libdir=${CTORDIR} --build-dir=${BUILDDIR}

# ctor should be rebuilt at this point, so md5 sum should have changed
(echo $MD5 | md5sum --status -c) && fail ${LINENO}

# configuration.cc should have been generated now
[ ! -f configuration.cc ] && fail ${LINENO}

# Shouldn't compile anything yet - only configure
[ -f ${BUILDDIR}/hello-hello_cc.o ] && fail ${LINENO}

MD5=`md5sum ctor`

# Run normally to build project
ctor -v

# Compiled object should now exist
[ ! -f ${BUILDDIR}/hello-hello_cc.o ] && fail ${LINENO}

# ctor should not have been rebuilt, so md5 sum should be the same
(echo $MD5 | md5sum --status -c) || fail ${LINENO}

MOD1=`stat -c %Y ${BUILDDIR}/hello-hello_cc.o`
touch hello.cc
sleep 1.1

# Run normally to rebuild hello.cc
ctor -v

# Object file should have been recompiled
MOD2=`stat -c %Y ${BUILDDIR}/hello-hello_cc.o`
[[ $MOD1 == $MOD2 ]] && fail ${LINENO}

# Replacve -DFOO with -DBAR in foo external.cxxflags
echo "** ctor_files/ctor.cc.bar"
cp ctor_files/ctor.cc.bar ctor.cc

MD5C=`md5sum configuration.cc`
MD5=`md5sum ctor`
MOD1=`stat -c %Y build/hello-hello_cc.o`
sleep 1.1

# Run normally to reconfigure, rebuild ctor and rebuild hello.cc
ctor -v

MOD2=`stat -c %Y ${BUILDDIR}/hello-hello_cc.o`
[[ $MOD1 == $MOD2 ]] && fail ${LINENO}
(echo $MD5C | md5sum --status -c) && fail ${LINENO}
(echo $MD5 | md5sum --status -c) && fail ${LINENO}

echo "** ctor_files/ctor.cc.multi"
cp ctor_files/ctor.cc.multi ctor.cc

MD5C=`md5sum configuration.cc`
MD5=`md5sum ctor`
MOD1=`stat -c %Y ${BUILDDIR}/hello-hello_cc.o`
sleep 1.1

# Run normally to reconfigure, rebuild ctor and rebuild hello.cc
ctor -v

MOD2=`stat -c %Y ${BUILDDIR}/hello-hello_cc.o`
[[ $MOD1 == $MOD2 ]] && fail ${LINENO}
(echo $MD5C | md5sum --status -c) && fail ${LINENO}
(echo $MD5 | md5sum --status -c) && fail ${LINENO}

# now touching foobar.h, should retrigger re-configuration
touch foobar.h

MOD1=`stat -c %Y ctor`
sleep 1.1

# Run normally to reconfigure, rebuild ctor and rebuild hello.cc
ctor -v

MOD2=`stat -c %Y ctor`
[[ $MOD1 == $MOD2 ]] && fail ${LINENO}

exit 0