From 760c5123ab0fe0d7b0ebbc1904e578bd845b602e Mon Sep 17 00:00:00 2001
From: wrd <wrd@tutao.de>
Date: Thu, 9 Oct 2025 16:22:09 +0200
Subject: [PATCH] [ios, sdk] Optimize build

Check if generated files are up-to-date to avoid cascading rebuilds.

Co-authored-by: ivk <ivk@tutao.de>
---
 .gitignore                                   |  1 +
 tuta-sdk/ios/build-scripts/generate-swift.sh | 40 +++++++++++++-------
 2 files changed, 27 insertions(+), 14 deletions(-)

diff --git a/.gitignore b/.gitignore
index e0018b8acb..ac90c347b5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 build
+bindings
 cache
 target
 build-calendar-app
diff --git a/tuta-sdk/ios/build-scripts/generate-swift.sh b/tuta-sdk/ios/build-scripts/generate-swift.sh
index 54108cc8c8..197de08931 100755
--- a/tuta-sdk/ios/build-scripts/generate-swift.sh
+++ b/tuta-sdk/ios/build-scripts/generate-swift.sh
@@ -25,12 +25,8 @@ includeArch() {
 }
 
 createFolderStructure() {
-    if [ -d "${SRC_ROOT}/target/combined" ]; then
-        rm -r "${SRC_ROOT}/target/combined"
-    fi
-
-    mkdir "${SRC_ROOT}/target/combined/"
-    mkdir "${SRC_ROOT}/target/combined/${RELFLAG}"
+    mkdir -p "${SRC_ROOT}/target/combined/"
+    mkdir -p "${SRC_ROOT}/target/combined/${RELFLAG}"
 
     if [ -d "${SRC_ROOT}/tuta-sdk/ios/tutasdk/generated-src" ]; then
         rm -r "${SRC_ROOT}/tuta-sdk/ios/tutasdk/generated-src"
@@ -42,13 +38,29 @@ createFolderStructure() {
 }
 
 generateLibrary() {
-    lipo -create $ARCH_LIST -output "${SRC_ROOT}/target/combined/${RELFLAG}/libtutasdk.a"
+    for arch in $ARCH_LIST; do
+      if [ $arch -nt "${SRC_ROOT}/target/combined/${RELFLAG}/libtutasdk.a" ]; then
+        echo "$arch is newer!"
+        echo $(date -r $arch)
+        echo $(date -r "${SRC_ROOT}/target/combined/${RELFLAG}/libtutasdk.a" || echo "output of lipo doesn't exist")
+        lipo -create $ARCH_LIST -output "${SRC_ROOT}/target/combined/${RELFLAG}/libtutasdk.a"
+        break
+      fi
+    done
 
-    cp "${SRC_ROOT}/target/combined/${RELFLAG}/libtutasdk.a" "${SRC_ROOT}/tuta-sdk/ios/tutasdk/generated-src/tutasdk.a"
+    cp -p "${SRC_ROOT}/target/combined/${RELFLAG}/libtutasdk.a" "${SRC_ROOT}/tuta-sdk/ios/tutasdk/generated-src/tutasdk.a"
 
-    mv $SRC_ROOT/bindings/*.h "${SRC_ROOT}/tuta-sdk/ios/tutasdk/generated-src/headers/"
-    mv $SRC_ROOT/bindings/*.modulemap "${SRC_ROOT}/tuta-sdk/ios/tutasdk/generated-src/headers/"
-    mv $SRC_ROOT/bindings/*.swift "${SRC_ROOT}/tuta-sdk/ios/tutasdk/generated-src/Sources/"
+    cp -p $SRC_ROOT/bindings/*.h "${SRC_ROOT}/tuta-sdk/ios/tutasdk/generated-src/headers/"
+    cp -p $SRC_ROOT/bindings/*.modulemap "${SRC_ROOT}/tuta-sdk/ios/tutasdk/generated-src/headers/"
+    cp -p $SRC_ROOT/bindings/*.swift "${SRC_ROOT}/tuta-sdk/ios/tutasdk/generated-src/Sources/"
+}
+
+genSwiftIfNeeded() {
+  if [ "${SRC_ROOT}/target/$1/${RELFLAG}/libtutasdk.dylib" -nt "$SRC_ROOT/bindings/tutasdk.swift" ]; then
+    cargo run --package uniffi-bindgen -- generate --library "${SRC_ROOT}/target/$1/${RELFLAG}/libtutasdk.dylib" --out-dir "$SRC_ROOT/bindings" --language=swift
+  else
+    echo "File $SRC_ROOT/bindings/tutasdk.swift is up to date, no need to rengenerate"
+  fi
 }
 
 cd $SRC_ROOT
@@ -66,18 +78,18 @@ for arch in $ARCHS; do
       fi
 
       # Intel iOS simulator
-    cargo run --package uniffi-bindgen -- generate --library "${SRC_ROOT}/target/x86_64-apple-ios/${RELFLAG}/libtutasdk.dylib" --out-dir "$SRC_ROOT/bindings" --language=swift
+    genSwiftIfNeeded x86_64-apple-ios
     includeArch "${SRC_ROOT}/target/x86_64-apple-ios/${RELFLAG}/libtutasdk.a";
       ;;
 
     arm64)
       if [ $IS_SIMULATOR -eq 0 ]; then
         # Hardware iOS targets
-        cargo run --package uniffi-bindgen -- generate --library "${SRC_ROOT}/target/aarch64-apple-ios/${RELFLAG}/libtutasdk.dylib" --out-dir "$SRC_ROOT/bindings" --language=swift
+        genSwiftIfNeeded aarch64-apple-ios
         includeArch "${SRC_ROOT}/target/aarch64-apple-ios/${RELFLAG}/libtutasdk.a";
       else
         # M1 iOS simulator
-        cargo run --package uniffi-bindgen -- generate --library "${SRC_ROOT}/target/aarch64-apple-ios-sim/${RELFLAG}/libtutasdk.dylib" --out-dir "$SRC_ROOT/bindings" --language=swift
+        genSwiftIfNeeded aarch64-apple-ios-sim
         includeArch "${SRC_ROOT}/target/aarch64-apple-ios-sim/${RELFLAG}/libtutasdk.a";
       fi
   esac