#!/bin/sh
# Builds native/build/DeepFilter.xcframework and copies the DeepFilterNet 3
# model beside it: Rikorose/DeepFilterNet's libDF (MIT or Apache-2.0) with
# its C API, as a static library for Mac, iPhone and the iPhone simulator
# (Apple silicon).
#
# Built rather than committed, as CallsBridge and RNNoise are. Needs rustup
# (https://rustup.rs); the toolchain, its targets and cbindgen are pinned
# and installed on first run.
set -eu
cd "$(dirname "$0")/.."

commit=d375b2d8309e0935d165700c91da9de862a99c31
toolchain=1.92.0
cbindgen_version=0.29.2
out=build/DeepFilter.xcframework
model=build/DeepFilterNet3_onnx.tar.gz
stamp="$out/.built-$commit-$toolchain"
if [ -f "$stamp" ] && [ -f "$model" ]; then exit 0; fi

PATH="$HOME/.cargo/bin:$PATH"
command -v rustup >/dev/null || {
  echo "build-deepfilter: rustup is required (https://rustup.rs)" >&2
  exit 1
}
targets="aarch64-apple-darwin aarch64-apple-ios aarch64-apple-ios-sim"
# shellcheck disable=SC2086
rustup toolchain install "$toolchain" --profile minimal $(printf ' -t %s' $targets) >/dev/null
if [ "$(cbindgen --version 2>/dev/null)" != "cbindgen $cbindgen_version" ]; then
  cargo "+$toolchain" install cbindgen --version "$cbindgen_version" --locked
fi

work=build/deepfilter
mkdir -p "$work"
if [ ! -d "$work/src/.git" ]; then
  rm -rf "$work/src"
  git clone --quiet https://github.com/Rikorose/DeepFilterNet.git "$work/src"
fi
git -C "$work/src" -c advice.detachedHead=false checkout --quiet --force "$commit"

# Deployment targets matching the apps, so the linker does not warn that
# the library was built for newer systems than they run on.
export MACOSX_DEPLOYMENT_TARGET=14.0 IPHONEOS_DEPLOYMENT_TARGET=17.0
for target in $targets; do
  cargo "+$toolchain" build --manifest-path "$work/src/Cargo.toml" -p deep_filter --lib \
    --release --features capi --target "$target" --target-dir "$work/target"
done

headers="$work/headers"
rm -rf "$headers"
mkdir -p "$headers/DeepFilter"
cbindgen --config "$work/src/cbindgen.toml" --crate deep_filter \
  --output "$headers/DeepFilter/deep_filter.h" "$work/src/libDF"
cat >"$headers/DeepFilter/module.modulemap" <<'EOF'
module DeepFilter {
  header "deep_filter.h"
  link "df"
  export *
}
EOF

rm -rf "$out"
xcodebuild -create-xcframework \
  -library "$work/target/aarch64-apple-darwin/release/libdf.a" -headers "$headers" \
  -library "$work/target/aarch64-apple-ios/release/libdf.a" -headers "$headers" \
  -library "$work/target/aarch64-apple-ios-sim/release/libdf.a" -headers "$headers" \
  -output "$out" >/dev/null
cp "$work/src/models/DeepFilterNet3_onnx.tar.gz" "$model"
cp "$work/src/LICENSE-MIT" "$out/LICENSE-MIT"
touch "$stamp"
printf 'Built %s/%s\n' "$PWD" "$out"