#!/bin/sh

# globals

ROOT=~/root
VENDOR=$ROOT/vendor

# ------------------------------------------------------------------------
# OpenBLAS

BLAS_URL="https://github.com/xianyi/OpenBLAS.git"
BLAS_TAG="v0.3.17"

build_blas()
{
    git clone $BLAS_URL blas
    cd blas && git checkout $BLAS_TAG
    NO_SHARED=1 TARGET=GENERIC PREFIX=$ROOT make -j2
    NO_SHARED=1 make install PREFIX=$ROOT

    rm -rf $ROOT/lib/cmake
    rm -rf $ROOT/lib/pkgconfig

    mv $ROOT/include/lapacke.h \
       $ROOT/include/lapack.h \
       $ROOT/include/cblas.h \
       $ROOT/include/f77blas.h \
       $ROOT/include/lapacke_utils.h \
       $ROOT/include/openblas_config.h \
       $ROOT/include/lapacke_config.h \
       $ROOT/include/lapacke_mangling.h \
       $ROOT/include/vendor/blas

    cd $VENDOR
    echo $BLAS_TAG > blas/build.tag
}

# ------------------------------------------------------------------------
# NLOpt

NLOPT_URL="https://github.com/stevengj/nlopt.git"
NLOPT_TAG="v2.7.0"

build_nlopt()
{
    git clone $NLOPT_URL
    cd nlopt && git checkout $NLOPT_TAG && mkdir build && cd build
    cmake \
        -DCMAKE_INSTALL_PREFIX=$ROOT \
        -DBUILD_SHARED_LIBS=OFF \
        -DNLOPT_PYTHON=OFF \
        -DNLOPT_MATLAB=OFF \
        -DNLOPT_OCTAVE=OFF \
        -DNLOPT_CXX=OFF \
        -DNLOPT_GUILE=OFF \
        -DNLOPT_SWIG=OFF \
        -DNLOPT_FORTRAN=OFF \
        -DCMAKE_BUILD_TYPE=Release \
        ..
    make -j2
    sed -i -n '/nlopt.[ah]$/p' install_manifest.txt
    make install

    # remove unwanted files
    rm -f  $ROOT/nlopt.hpp
    rm -f  $ROOT/nlopt.f
    rm -rf $ROOT/lib/cmake
    # rm -rf $ROOT/man

    mv $ROOT/include/nlopt.h $ROOT/include/vendor/nlopt.h

    cd $VENDOR
    echo $NLOPT_TAG > nlopt/build.tag
}

# ------------------------------------------------------------------------
# musl libc

MUSL_URL="git://git.musl-libc.org/musl"
MUSL_TAG="v1.2.2"

build_musl()
{
    git clone $MUSL_URL
    cd musl && git checkout $MUSL_TAG
    ./configure \
        --prefix=$ROOT \
        --includedir=$ROOT/include/vendor/libc \
        --disable-shared

    make -j2
    make install
    mv $ROOT/lib/rcrt1.o \
       $ROOT/lib/crt1.o \
       $ROOT/lib/Scrt1.o \
       $ROOT/lib/musl-gcc.specs \
       $ROOT/lib/crt
    mv $ROOT/lib/crti.o $ROOT/lib/crtn.o $ROOT/lib/crt/x86_64

    rm $ROOT/bin/musl-gcc

    cd $VENDOR
    echo $MUSL_TAG > musl/build.tag
}

# ------------------------------------------------------------------------
# musl libc

ZLIB_URL="https://github.com/madler/zlib.git"
ZLIB_TAG="v1.2.11"

build_zlib()
{
    git clone $ZLIB_URL zlib
    cd zlib && git checkout $ZLIB_TAG
    prefix=$ROOT ./configure --static

    make -j2
    make install

    mv $ROOT/include/zlib.h $ROOT/include/zconf.h $ROOT/include/vendor

    cd $VENDOR
    echo $ZLIB_TAG > zlib/build.tag
}

# ------------------------------------------------------------------------
# GLFW

GLFW_URL="https://github.com/glfw/glfw.git"
GLFW_TAG="3.3.4"

build_glfw()
{
    git clone $GLFW_URL glfw
    cd glfw && git checkout $GLFW_TAG && mkdir build && cd build

    cmake \
        -DCMAKE_INSTALL_PREFIX=$ROOT \
        -DBUILD_SHARED_LIBS=OFF \
        -DGLFW_BUILD_EXAMPLES=OFF \
        -DGLFW_BUILD_TESTS=OFF \
        -DGLFW_BUILD_DOCS=OFF \
        -DGLFW_VULKAN_STATIC=OFF \
        -DCMAKE_BUILD_TYPE=Release \
        ..

    make -j2
    make install

    mv $ROOT/include/GLFW $ROOT/include/vendor
    rm -rf $ROOT/lib/cmake
    rm -rf $ROOT/lib/pkgconfig

    cd $VENDOR
    echo $GLFW_TAG > glfw/build.tag
}

# ------------------------------------------------------------------------
# wlroot

WLROOTS_URL="https://github.com/swaywm/wlroots.git"
WLROOTS_TAG="0.14.1"

build_wlroots()
{
    git clone $WLROOTS_URL
    cd wlroots && git checkout $WLROOTS_TAG 
    meson \
        --prefix=$ROOT \
        --includedir=include/vendor \
        --libdir=lib/vendor \
        -Ddefault_library=static \
        build/ \
    && ninja -C build/ \
    && meson install -C build

    mv $ROOT/lib/vendor/pkgconfig/* $ROOT/lib/pkgconfig
    rm -rf $ROOT/lib/vendor/pkgconfig

    cd $VENDOR
    echo $WLROOTS_TAG > wlroots/build.tag
}

# ------------------------------------------------------------------------
# utility functions

update()
{
    base=$1
    tag=$2

    if [ -d $base ] && [ `cat $base/build.tag` = $tag ]; then
        echo "$base: up to date"
    else
        build_$base
    fi
}

# ------------------------------------------------------------------------
# main point of entry

# update nlopt $NLOPT_TAG
# update blas $BLAS_TAG

update musl    $MUSL_TAG
update zlib    $ZLIB_TAG
update wlroots $WLROOTS_TAG