#! /bin/bash

# ~/Dropbox/dev/scripts/cmake/clean-rebuild-qt-cmake-linux.sh

set -e
set -o pipefail

topLevelSourceDir=$1
topLevelBuildDir=$2
configPath=$3
submoduleStr=$4

usageExample="Usage example: ~/Dropbox/dev/scripts/cmake/clean-rebuild-qt-cmake-linux.sh ~/dev/qt-dev ~/dev/qt-dev-debug ~/Dropbox/dev/configs/qt/cmake/linux-debug.txt qtbase,qtdeclarative,qtquickcontrols2,qttools"

if [ -z "$1" ]; then
    echo "topLevelSourceDir argument not supplied"
    echo $usageExample
    exit
fi

if [ -z "$2" ]; then
    echo "topLevelBuildDir argument not supplied"
    echo $usageExample
    exit
fi

if [ -z "$3" ]; then
    echo "configPath argument not supplied"
    echo $usageExample
    exit
fi

if [ -z "$4" ]; then
    echo "submoduleStr argument not supplied"
    echo $usageExample
    exit
fi

if [ ! -d "$topLevelSourceDir" ]; then
    echo "Source directory \"$topLevelSourceDir\" doesn't exist; aborting"
    echo $usageExample
    exit
fi

echo === reading configure options from $configPath
# https://stackoverflow.com/a/2439587/904422
configOptions=$(head -n 1 $configPath)

# Check that configure options were passed.
if [ "$configOptions" = "" ]; then
    echo "Must pass one or more configure options"
    exit
fi

echo === configure options are: $configOptions

# Read the list of submodules using , as the delimiter
# https://stackoverflow.com/a/15988793/904422
IFS="," read -a submodules <<<"$submoduleStr"

echo === submodules are: ${submodules[*]}

# Check that submodules were passed.
if [ ${#submodules[@]} -eq 0 ]; then
    echo "Must pass one or more submodules"
    exit
fi

# Ensure that qtbase is first in the list of submodules
# https://stackoverflow.com/a/15394738/904422
qtbaseToken="qtbase"
if [[ ! "${submodules[0]}" =~ "${qtbaseToken}" ]]; then
    echo "submoduleStr argument must contain qtbase (was: \"$submoduleStr\")"
    exit
fi

echo === wiping $topLevelBuildDir
rm -fr $topLevelBuildDir

echo === creating $topLevelBuildDir
mkdir $topLevelBuildDir

# Should already be handled by "set -e", but just to be sure...
if [ ! -d "$topLevelBuildDir" ]; then
    echo "Failed to create build directory \"$topLevelBuildDir\"; aborting"
    echo $usageExample
    exit
fi

echo === cding to $topLevelBuildDir
cd $topLevelBuildDir

# Ensure that our own, newer CMake is used.
export PATH=/home/mitch/dev/cmake-build/bin:$PATH

# For qdoc.
export LLVM_INSTALL_DIR=/home/mitch/dev/libclang-release_110-based-linux-Ubuntu20.04-gcc9.3-x86_64/libclang

# Configure and build each module within the top-level build directory.
for moduleName in "${submodules[@]}"
do
    echo === creating $topLevelBuildDir/$moduleName
    mkdir $moduleName

    echo === cding to $topLevelBuildDir/$moduleName
    cd $moduleName

    echo === configuring module $moduleName
    echo === value of LLVM_INSTALL_DIR is: $LLVM_INSTALL_DIR
    if [ "$moduleName" = "$qtbaseToken" ]
    then
        $topLevelSourceDir/qtbase/configure -- $configOptions 2>&1 | tee -a configure-output.txt
    else
        $topLevelBuildDir/qtbase/bin/qt-configure-module $topLevelSourceDir/$moduleName | tee -a configure-output.txt
    fi

    echo === building module $moduleName
    ninja 2>&1 | tee -a ninja-output.txt

    echo === cding back to $topLevelBuildDir
    cd $topLevelBuildDir
done