generate.sh

#!/usr/bin/env bash
set -euo pipefail
set -x

XKBCOMMON_REV=c5ec563644aa937924b539066b94346427f6debc
XLIB_REV=80dbb7d029b2bbf58b96421e59c83e34f763ab70
XCURSOR_REV=15efad7ccd035f5d1ddc8d437e047569d1775fa7
XRANDR_REV=8a4ba1974bcf07057cf891128d86ae1ab5303574
XFIXES_REV=55bb2d1d57d43e0595ce45393f26eb433d75a7cc
XRENDER_REV=f32afe9f877ae032c6bc9c27b17b7978b1b4c856
XINERAMA_REV=d7162b962710bc724b41cabab4e7cea303c4b541
XI_REV=f00f7e9140b4707775331950dd67851e55058c40
XSCRNSAVER_REV=3f753e7a4050db083474444ae91cc17a849eaa4d
XEXT_REV=2a694ba264ccdb205909909abfe8b136f9156ebe
XORGPROTO_REV=fcb7e9a1a0b593a44740d83b0babddd331fea830
XCBPROTO_REV=cf7e2581b613802f2f8ec2a4b50a6a20aad4bf52
XCB_REV=4d6e1c8fffaf811cf4d0e68ff3bc6f50e62c32c7

# `git clone --depth 1` but at a specific revision
git_clone_rev() {
    repo=$1
    rev=$2
    dir=$3

    rm -rf "$dir"
    mkdir "$dir"
    pushd "$dir"
    git init -q
    git fetch "$repo" "$rev" --depth 1
    git checkout -q FETCH_HEAD
    popd
}

# macOS: use gsed for GNU compatibility
if [[ "$OSTYPE" == "linux-gnu"* ]]; then
    sed=$(which sed)
else
    if ! command -v gsed &>/dev/null; then
        echo "error: gsed not found. Install it with: brew install gnu-sed" >&2
        exit 1
    fi
    sed=gsed
fi

# append_license <target_copying_file> <label> <source_license_file>
append_license() {
    if [ -s "$1" ]; then
        printf '\n%s\n\n' "===============================================================================" >> "$1"
    fi
    printf '%s\n\n' "--- $2 ---" >> "$1"
    cat "$3" >> "$1"
}

# xkbcommon
rm -rf xkbcommon
git_clone_rev https://github.com/xkbcommon/libxkbcommon.git "$XKBCOMMON_REV" _xkbcommon
mv _xkbcommon/include/xkbcommon .
cp _xkbcommon/LICENSE xkbcommon/LICENSE
rm -rf _xkbcommon

# Xlib
rm -rf X11
mkdir -p X11/extensions
git_clone_rev https://gitlab.freedesktop.org/xorg/lib/libx11.git "$XLIB_REV" _xlib
mv _xlib/include/X11/*.h X11
mv _xlib/include/X11/extensions/*.h X11/extensions
# generate config header
$sed \
    -e "s/#undef XTHREADS/#define XTHREADS 1/" \
    -e "s/#undef XUSE_MTSAFE_API/#define XUSE_MTSAFE_API 1/" \
    _xlib/include/X11/XlibConf.h.in > X11/XlibConf.h
append_license X11/LICENSE libx11 _xlib/COPYING
rm -rf _xlib

# xcursor
mkdir -p X11/Xcursor
# generate header file with version
xcursor_ver=($(
    curl -L "https://gitlab.freedesktop.org/xorg/lib/libxcursor/-/raw/$XCURSOR_REV/configure.ac" |
        $sed -n 's/.*\[\([0-9]\+\)\.\([0-9]\+\)\.\([0-9]\+\)\].*/\1 \2 \3/p'
))
curl -L "https://gitlab.freedesktop.org/xorg/lib/libxcursor/-/raw/$XCURSOR_REV/include/X11/Xcursor/Xcursor.h.in" |
    $sed \
        -e "s/#undef XCURSOR_LIB_MAJOR/#define XCURSOR_LIB_MAJOR ${xcursor_ver[0]}/" \
        -e "s/#undef XCURSOR_LIB_MINOR/#define XCURSOR_LIB_MINOR ${xcursor_ver[1]}/" \
        -e "s/#undef XCURSOR_LIB_REVISION/#define XCURSOR_LIB_REVISION ${xcursor_ver[2]}/" \
        > X11/Xcursor/Xcursor.h
curl -L "https://gitlab.freedesktop.org/xorg/lib/libxcursor/-/raw/$XCURSOR_REV/COPYING" \
    -o _copying_libxcursor
append_license X11/LICENSE libxcursor _copying_libxcursor
rm _copying_libxcursor

# xrandr, xfixes, xrender, xinerama, xi, xscrnsaver
curl -LZ \
    -O "https://gitlab.freedesktop.org/xorg/lib/libxrandr/-/raw/$XRANDR_REV/include/X11/extensions/Xrandr.h" \
    -O "https://gitlab.freedesktop.org/xorg/lib/libxfixes/-/raw/$XFIXES_REV/include/X11/extensions/Xfixes.h" \
    -O "https://gitlab.freedesktop.org/xorg/lib/libxrender/-/raw/$XRENDER_REV/include/X11/extensions/Xrender.h" \
    -O "https://gitlab.freedesktop.org/xorg/lib/libxinerama/-/raw/$XINERAMA_REV/include/X11/extensions/Xinerama.h" \
    -O "https://gitlab.freedesktop.org/xorg/lib/libxinerama/-/raw/$XINERAMA_REV/include/X11/extensions/panoramiXext.h" \
    -O "https://gitlab.freedesktop.org/xorg/lib/libxi/-/raw/$XI_REV/include/X11/extensions/XInput.h" \
    -O "https://gitlab.freedesktop.org/xorg/lib/libxi/-/raw/$XI_REV/include/X11/extensions/XInput2.h" \
    -O "https://gitlab.freedesktop.org/xorg/lib/libxscrnsaver/-/raw/$XSCRNSAVER_REV/include/X11/extensions/scrnsaver.h" \
    --output-dir X11/extensions
mkdir -p _copying_tmp
curl -LZ \
    -o "_copying_tmp/libxrandr" "https://gitlab.freedesktop.org/xorg/lib/libxrandr/-/raw/$XRANDR_REV/COPYING" \
    -o "_copying_tmp/libxfixes" "https://gitlab.freedesktop.org/xorg/lib/libxfixes/-/raw/$XFIXES_REV/COPYING" \
    -o "_copying_tmp/libxrender" "https://gitlab.freedesktop.org/xorg/lib/libxrender/-/raw/$XRENDER_REV/COPYING" \
    -o "_copying_tmp/libxinerama" "https://gitlab.freedesktop.org/xorg/lib/libxinerama/-/raw/$XINERAMA_REV/COPYING" \
    -o "_copying_tmp/libxi" "https://gitlab.freedesktop.org/xorg/lib/libxi/-/raw/$XI_REV/COPYING" \
    -o "_copying_tmp/libxscrnsaver" "https://gitlab.freedesktop.org/xorg/lib/libxscrnsaver/-/raw/$XSCRNSAVER_REV/COPYING"
for f in _copying_tmp/*; do
    append_license X11/LICENSE "$(basename "$f")" "$f"
done
rm -rf _copying_tmp

# xext
git_clone_rev https://gitlab.freedesktop.org/xorg/lib/libxext.git "$XEXT_REV" _xext
mv _xext/include/X11/extensions/*.h X11/extensions
append_license X11/LICENSE libxext _xext/COPYING
rm -rf _xext

# xorgproto
git_clone_rev https://gitlab.freedesktop.org/xorg/proto/xorgproto.git "$XORGPROTO_REV" _xorgproto
{
    cd _xorgproto/include/X11
    find . -name '*.h'
} | while read -r file; do
    source=_xorgproto/include/X11/$file
    target=X11/$file
    mkdir -p "$(dirname "$target")"
    mv "$source" "$target"
done

# generate template Xpoll.h header
$sed \
    's/@USE_FDS_BITS@/__fds_bits/' \
    _xorgproto/include/X11/Xpoll.h.in > X11/Xpoll.h

# GLX headers
rm -rf GL
mkdir GL
{
    cd _xorgproto/include/GL
    find . -name '*.h'
} | while read -r file; do
    source=_xorgproto/include/GL/$file
    target=GL/$file
    mkdir -p "$(dirname "$target")"
    mv "$source" "$target"
done

# xorgproto license files (one per protocol)
for f in _xorgproto/COPYING-*; do
    label="xorgproto/$(basename "$f")"
    append_license X11/LICENSE "$label" "$f"
done
append_license GL/LICENSE xorgproto/COPYING-glproto _xorgproto/COPYING-glproto

rm -rf _xorgproto

# xcb (this one's bad!)
rm -rf xcb
mkdir xcb
git_clone_rev https://gitlab.freedesktop.org/xorg/lib/libxcb.git "$XCB_REV" _xcb
git_clone_rev https://gitlab.freedesktop.org/xorg/proto/xcbproto.git "$XCBPROTO_REV" _xcbproto
mv _xcb/src/c_client.py _xcbproto
pushd _xcbproto
./autogen.sh
make
make DESTDIR="$PWD/out" install
mkdir c_client_out
pushd c_client_out
export PYTHONPATH="../out/usr/local/lib/python3.10/site-packages"
for file in ../src/*.xml; do
    # The -c, -l and -s parameter are only used for man page
    # generation and aren't relevant for headers.
    python3 ../c_client.py -c _ -l _ -s _ "$file"
done
popd
popd
mv _xcb/src/*.h xcb
mv _xcbproto/c_client_out/*.h xcb
append_license xcb/LICENSE libxcb _xcb/COPYING
append_license xcb/LICENSE xcbproto _xcbproto/COPYING
rm -rf _xcb _xcbproto