iOS: put the stdlib and the python/ payload inside the .app and set PYTHONHOME #59

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1. b-re-w commented on Oct 3, 2026

   

   b-re-w

   on Oct 3, 2026

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   Input from toolchain#20 research (PMM build session):

   • Loader path: NSBundle.mainBundle.resourcePath + "/python" = $TARGET_BUILD_DIR/$UNLOCALIZED_RESOURCES_FOLDER_PATH/python (PythonPayload.ios.kt:44-49). toolchain's build/pythonStaging/ios/python/ (task stagePythonBundleIos) already has that layout; copy as is.
   • Copy as a folder reference, not a group (a group flattens packages; init.py files collide); run after the Gradle task; keep stdlib and payload inside the bundle.
   • Natural route: mirror Compose MP's resource copy ($BUILT_PRODUCTS_DIR/$UNLOCALIZED_RESOURCES_FOLDER_PATH/compose-resources) with a Gradle task the Xcode Run Script calls; toolchain offers a thin stagePythonBundleIosForXcode if a single entry point helps.
   • usage-example/src/iosMain/app.xcodeproj: one Run Script (embedAndSignAppleFrameworkForXcode); its iosApp group path=iosApp while Swift files are in swift/ — looks broken.
2. b-re-w commented on Oct 3, 2026

   

   b-re-w

   on Oct 3, 2026

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   Xcode phase contract (toolchain#43 stagePythonBundleIosForXcode prints one line PYTHON_PAYLOAD_DIR=<abs path> under -q and fails when there is no payload). The phase MUST NOT pipe Gradle into sed and rsync from the result unguarded: with a failing Gradle the substitution is empty and rsync -a --delete "/" ... copies the root filesystem. Use:

   set -euo pipefail
   out=$(./gradlew -q :app:stagePythonBundleIosForXcode)
   dir=$(printf '%s\n' "$out" | sed -n 's/^PYTHON_PAYLOAD_DIR=//p')
   [ -n "$dir" ] && [ -d "$dir" ] || { echo "error: no Python payload dir from Gradle" >&2; exit 1; }
   rsync -a --delete "$dir/" "$TARGET_BUILD_DIR/$UNLOCALIZED_RESOURCES_FOLDER_PATH/python/"
   
3. b-re-w commented on Oct 3, 2026

   

   b-re-w

   on Oct 3, 2026

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   Landed in develop via #89.
4. b-re-w

   closed this as completedon Oct 3, 2026