#!/bin/bash

# Halt on errors
set -e

installroot=$PWD/dist;

if [ $# -lt 1 ]; then
    echo "Usage: $0 win32_binary [--debug]"
    exit 1;
fi

if [ ! -f "$1" ]; then
    echo "Cannot find file $1"
    echo ""
    echo "Usage: $0 win32_binary [--debug]"
    exit 1;
fi


# Note: This script is written to be used with the Fedora mingw environment
if [ "$(file $1  | grep -o x86-64)" == "x86-64" ]; then
    echo "Scanning dependencies for $1 (64bit binary)"
    MINGWROOT=/usr/x86_64-w64-mingw32/sys-root/mingw
else
    echo "Scanning dependencies for $1 (32bit binary)"
    MINGWROOT=/usr/i686-w64-mingw32/sys-root/mingw
fi

if [ "$2" == "--debug" ]; then
    withdebug=1
fi

isqt5=false

# Collect dependencies
function isnativedll {
    # If the import library exists but not the dynamic library, the dll ist most likely a native one
    local lower=${1,,}
    [ ! -e $MINGWROOT/bin/$1 ] && [ -f $MINGWROOT/lib/lib${lower/%.*/.a} ] && return 0;
    return 1;
}

function cpDep {
# Copy the specified binary dependency
    destdir="$installroot/${2:-$(dirname $1)}"
    name="$(basename $1)"
    test -e "$destdir/$name" && return 0
    if [ ! -e "$MINGWROOT/$1" ]; then
        echo "Error: missing $MINGWROOT/$1"
        return 0
    fi
    mkdir -p "$destdir" || return 1
    echo "Copying $1"
    cp -a "$MINGWROOT/$1" "$destdir/$name" || return 1
    if [ $withdebug ]; then test -e "$MINGWROOT/$1.debug" && cp "$MINGWROOT/$1.debug" "$destdir/$name.debug" && echo "Copying $1.debug" || echo "Warning: missing $name.debug"; fi
    autoCpDeps $destdir/$name || return 1
    return 0
}

function autoCpDeps {
# Collects and links the dependencies of the specified binary
    for dep in $(mingw-objdump -p "$1" | grep "DLL Name" | awk '{print $3}'); do
        # Hacks / Workarounds
        if [ "$dep" == "LIBPQ.dll" ]; then
            dep="libpq.dll"
        elif [ "$dep" == "QtUiToolsd4.dll" ]; then
            continue;
        elif [ "$dep" == "Qt5Core.dll" ]; then
            isqt5=true
        fi

        if [ ! -f "$dep" ] && ! isnativedll "$dep"; then
            cpDep bin/$dep || return 1
        fi
    done
    return 0
}

mkdir -p dist/bin
cp -a $1 dist/bin
autoCpDeps $1
if [ $withdebug ]; then
    cpDep bin/gdb.exe
fi
if [[ $isqt5 == true ]]; then
    mkdir -p dist/bin/platforms
    cp -a $MINGWROOT/lib/qt5/plugins/platforms/qwindows.dll dist/bin/platforms/
    autoCpDeps $MINGWROOT/lib/qt5/plugins/platforms/qwindows.dll
fi