#!/bin/sh
# Cross-compile Bananarchy X11 UI components for armv7 (Cortex-A7 + NEON-VFPv4):
# - sxmo-st (patched with HarfBuzz ligatures for Fira Code + XIM)
# - sxmo-dmenu (patched with XIM + 240x320 vertical search bar + Fira Code)
# - sxmo-dwm (configured for 240x320 + Fira Code + Pango statusbar + Nokia keypad)
set -eu

BASE_DIR="$(cd "$(dirname "$0")/.." && pwd)"
ROOTFS_DIR="${ROOTFS_DIR:-$BASE_DIR/rootfs}"
if [ -e "$ROOTFS_DIR" ]; then
  ROOTFS_DIR="$(realpath "$ROOTFS_DIR")"
fi

exec docker run --rm --network=host \
  -e HOST_UID="$(id -u)" \
  -e HOST_GID="$(id -g)" \
  -v "$BASE_DIR:/bananarchy" \
  -v "$ROOTFS_DIR:/target-rootfs" \
  alpine:3.24 sh -eu -c '
  cat > /etc/apk/repositories <<EOF
https://mirror.nura.eco/postmarketos/v26.06
https://dl-cdn.alpinelinux.org/alpine/edge/main
https://dl-cdn.alpinelinux.org/alpine/edge/community
https://dl-cdn.alpinelinux.org/alpine/edge/testing
EOF
  cp /bananarchy/keys/* /etc/apk/keys/

  echo "[1/5] Installing host cross-compilation toolchain..."
  apk add --no-cache \
    build-base \
    gcc-armv7 \
    g++-armv7 \
    binutils-armv7 \
    pkgconf >/dev/null

  echo "[2/5] Preparing armv7 sysroot (X11, Xft, HarfBuzz, Pango, FreeType, Fontconfig)..."
  SYSROOT="/tmp/armv7-sysroot"
  mkdir -p "$SYSROOT/etc/apk/keys"
  cp /etc/apk/repositories "$SYSROOT/etc/apk/repositories"
  cp /etc/apk/keys/* "$SYSROOT/etc/apk/keys/"
  apk --root "$SYSROOT" --initdb --arch armv7 add --no-scripts \
    alpine-baselayout \
    musl-dev \
    linux-headers \
    alsa-lib-dev \
    libx11-dev \
    libxft-dev \
    libxinerama-dev \
    libxext-dev \
    libxrender-dev \
    libxcb-dev \
    xcb-util-dev \
    fontconfig-dev \
    freetype-dev \
    harfbuzz-dev \
    pango-dev \
    glib-dev \
    cairo-dev >/dev/null

  export PKG_CONFIG_SYSROOT_DIR="$SYSROOT"
  export PKG_CONFIG_LIBDIR="$SYSROOT/usr/lib/pkgconfig:$SYSROOT/usr/share/pkgconfig"
  CC="armv7-alpine-linux-musleabihf-gcc --sysroot=$SYSROOT"
  CXX="armv7-alpine-linux-musleabihf-g++ --sysroot=$SYSROOT"
  STRIP="armv7-alpine-linux-musleabihf-strip"
  OPT_CFLAGS="-O2 -march=armv7-a -mtune=cortex-a7 -mfpu=neon-vfpv4 -mfloat-abi=hard -fno-plt -fomit-frame-pointer"

  mkdir -p /bananarchy/prebuilt/sxmo-x11/usr/bin

  echo "[3/5] Compiling patched sxmo-st (with HarfBuzz Fira Code ligatures + XIM)..."
  cd /bananarchy/src/sxmo-st
  cp -f config.def.h config.h
  ST_INCS="$(pkgconf --cflags x11 xft fontconfig freetype2 harfbuzz)"
  ST_LIBS="$(pkgconf --libs x11 xft fontconfig freetype2 harfbuzz) -lm -lrt -lutil"
  $CC $OPT_CFLAGS -DVERSION=\"0.8.4.1-bananarchy\" -D_XOPEN_SOURCE=600 $ST_INCS \
    st.c x.c hb.c $ST_LIBS -o /bananarchy/prebuilt/sxmo-x11/usr/bin/st
  $STRIP --strip-unneeded /bananarchy/prebuilt/sxmo-x11/usr/bin/st

  echo "[4/5] Compiling patched sxmo-dmenu (with XIM + 240x320 vertical layout + Fira Code)..."
  cd /bananarchy/src/sxmo-dmenu
  cp -f config.def.h config.h
  DMENU_INCS="$(pkgconf --cflags x11 xinerama xft fontconfig freetype2)"
  DMENU_LIBS="$(pkgconf --libs x11 xinerama xft fontconfig freetype2)"
  $CC $OPT_CFLAGS -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_XOPEN_SOURCE=700 -D_POSIX_C_SOURCE=200809L -DVERSION=\"5.0.14-bananarchy\" -DXINERAMA $DMENU_INCS \
    dmenu.c drw.c util.c $DMENU_LIBS -o /bananarchy/prebuilt/sxmo-x11/usr/bin/dmenu
  $CC $OPT_CFLAGS -D_DEFAULT_SOURCE -DVERSION=\"5.0.14-bananarchy\" \
    stest.c -o /bananarchy/prebuilt/sxmo-x11/usr/bin/stest
  cp -f dmenu_path dmenu_run /bananarchy/prebuilt/sxmo-x11/usr/bin/
  chmod 755 /bananarchy/prebuilt/sxmo-x11/usr/bin/dmenu_path /bananarchy/prebuilt/sxmo-x11/usr/bin/dmenu_run
  $STRIP --strip-unneeded /bananarchy/prebuilt/sxmo-x11/usr/bin/dmenu /bananarchy/prebuilt/sxmo-x11/usr/bin/stest

  echo "[5/5] Compiling patched sxmo-dwm (240x320 + Fira Code + Pango statusbar + Nokia keypad)..."
  cd /bananarchy/src/sxmo-dwm
  cp -f config.def.h config.h
  DWM_INCS="$(pkgconf --cflags x11 xinerama xft fontconfig freetype2 pango pangoxft xcb xcb-res)"
  DWM_LIBS="$(pkgconf --libs x11 xinerama xft fontconfig freetype2 pango pangoxft xcb xcb-res) -lX11-xcb -lrt"
  $CC $OPT_CFLAGS -std=c99 -Wno-deprecated-declarations -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_POSIX_C_SOURCE=2 -DVERSION=\"6.3.1-bananarchy\" -DXINERAMA -DNOBONSAI $DWM_INCS \
    dwm.c drw.c util.c $DWM_LIBS -o /bananarchy/prebuilt/sxmo-x11/usr/bin/dwm
  $STRIP --strip-unneeded /bananarchy/prebuilt/sxmo-x11/usr/bin/dwm

  echo "[6/6] Compiling XDrawer (240x320 global phone controls drawer)..."
  cd /bananarchy/src/xdrawer
  XDRAWER_INCS="$(pkgconf --cflags x11 xft fontconfig freetype2 pango pangoxft alsa)"
  XDRAWER_LIBS="$(pkgconf --libs x11 xft fontconfig freetype2 pango pangoxft alsa)"
  $CXX $OPT_CFLAGS -std=c++17 -Wall -Wextra $XDRAWER_INCS \
    xdrawer.cpp $XDRAWER_LIBS -o /bananarchy/prebuilt/sxmo-x11/usr/bin/xdrawer
  $STRIP --strip-unneeded /bananarchy/prebuilt/sxmo-x11/usr/bin/xdrawer
  ln -sf xdrawer /bananarchy/prebuilt/sxmo-x11/usr/bin/XDrawer

  mkdir -p /bananarchy/overlay/rootfs/usr/bin
  cp -a /bananarchy/prebuilt/sxmo-x11/usr/bin/. /bananarchy/overlay/rootfs/usr/bin/
  if [ -d /target-rootfs/usr/bin ]; then
    cp -a /bananarchy/prebuilt/sxmo-x11/usr/bin/. /target-rootfs/usr/bin/
  fi

  chown -R "$HOST_UID:$HOST_GID" /bananarchy/prebuilt/sxmo-x11 /bananarchy/overlay/rootfs/usr/bin /bananarchy/src/sxmo-st /bananarchy/src/sxmo-dmenu /bananarchy/src/sxmo-dwm /bananarchy/src/xdrawer
  ls -lh /bananarchy/prebuilt/sxmo-x11/usr/bin/st /bananarchy/prebuilt/sxmo-x11/usr/bin/dmenu /bananarchy/prebuilt/sxmo-x11/usr/bin/dwm /bananarchy/prebuilt/sxmo-x11/usr/bin/xdrawer
'