#!/bin/sh -e

# Install python-mako which is solely needed for mesa
# and thus contained in this build.
{
    cd mako

    python3 setup.py build
    python3 setup.py install \
        --prefix=/usr \
        --root="$PWD/dist"

    # Use a glob to avoid having to figure out the Python
    # version for the path below.
    cd dist/usr/lib/python*/site-packages

    # Set the PYTHONPATH so python knows where to find mako.
    # The one liner simply appends the existing path and
    # handles the case where an unset PYTHONPATH breaks
    # python as it will only contain our new addition.
    PYTHONPATH=$PWD:$(python -c "import sys; print(':'.join(sys.path))")

    cd -; cd ..
}

export PYTHONPATH
export DESTDIR="$1"
export CFLAGS="$CFLAGS -DGLX_X86_READONLY_TEXT"

# Fix issues with musl and firefox.
# https://bugs.freedesktop.org/show_bug.cgi?id=35268
# https://github.com/mesa3d/mesa/commit/9f37c9903b87f86a533bfaffa72f0ecb285b02b2
sed "/pre_args += '-DUSE_ELF_TLS'/d" meson.build > _
mv -f _ meson.build

# To prevent the need for users to fork the mesa package to add
# libglvnd support, the below code checks for its availability
# and enables it if present. ie: install glvnd, rebuild mesa.
! kiss l libglvnd >/dev/null 2>&1 || glvnd_enabled=true

meson \
    --prefix=/usr \
    --sysconfdir=/etc \
    --mandir=/usr/share/man \
    --localstatedir=/var \
    --buildtype=release \
    -Dplatforms=wayland \
    -Dglx=disabled \
    -Dzstd=false \
    -Dglvnd="${glvnd_enabled:-false}" \
    . output

ninja -C output
ninja -C output install