Wire local TDLib into iOS FFI build

scripts/build-ios-ffi-with-local-tdlib.sh

@@ -0,0 +1,55 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+target="${IOS_RUST_TARGET:-aarch64-apple-ios-sim}"
+
+case "${target}" in
+  aarch64-apple-ios)
+    tdlib_platform_dir="${TDLIB_IOS_PLATFORM_DIR:-iphoneos}"
+    ;;
+  aarch64-apple-ios-sim | x86_64-apple-ios)
+    tdlib_platform_dir="${TDLIB_IOS_PLATFORM_DIR:-iphonesimulator}"
+    ;;
+  *)
+    printf 'Unsupported iOS Rust target: %s\n' "${target}" >&2
+    printf 'Supported targets: aarch64-apple-ios, aarch64-apple-ios-sim, x86_64-apple-ios\n' >&2
+    exit 1
+    ;;
+esac
+
+tdlib_root="${LOCAL_TDLIB_PATH:-${repo_root}/.build/tdlib-ios/${tdlib_platform_dir}}"
+tdlib_version="${TDLIB_VERSION:-1.8.29}"
+
+if [[ -z "${DEVELOPER_DIR:-}" && -d /Applications/Xcode.app/Contents/Developer ]]; then
+  export DEVELOPER_DIR=/Applications/Xcode.app/Contents/Developer
+fi
+
+if [[ ! -d "${tdlib_root}/include" ]]; then
+  printf 'TDLib include directory not found: %s\n' "${tdlib_root}/include" >&2
+  printf 'Run scripts/build-tdlib-ios.sh first or set LOCAL_TDLIB_PATH to a TDLib install root.\n' >&2
+  exit 1
+fi
+
+if [[ ! -f "${tdlib_root}/lib/libtdjson.${tdlib_version}.dylib" ]]; then
+  printf 'TDLib dylib not found: %s\n' "${tdlib_root}/lib/libtdjson.${tdlib_version}.dylib" >&2
+  printf 'tdlib-rs local-tdlib expects the versioned dylib name on macOS-hosted builds.\n' >&2
+  exit 1
+fi
+
+cd "${repo_root}"
+
+if ! rustup target list --installed | grep -qx "${target}"; then
+  rustup target add "${target}"
+fi
+
+export LOCAL_TDLIB_PATH="${tdlib_root}"
+
+cargo build \
+  -p tele-ios-ffi \
+  --no-default-features \
+  --features core-session-local-tdlib \
+  --target "${target}" \
+  --release
+
+printf 'Built tele-ios-ffi for %s with LOCAL_TDLIB_PATH=%s\n' "${target}" "${LOCAL_TDLIB_PATH}"