13. Migrasi Strict Concurrency Checking

13. Migrasi Strict Concurrency Checking

Fase 1: Aktifkan Warning Mode

Di SPM:

// Package.swift
.target(
    name: "MyLib",
    swiftSettings: [
        .enableUpcomingFeature("StrictConcurrency"),
        .enableUpcomingFeature("InferSendableFromCaptures"),
    ]
)

Di Xcode project: Build Settings → Swift Strict Concurrency Checking → Complete.

Fase 2: Triage Warning

Kategorikan warning:

Warning	Strategi
"X is not Sendable" untuk model	Tambah : Sendable
"Capture of X in @Sendable closure"	let snapshot atau actor isolation
"Cross-actor reference"	Tambah await, isolasi method dengan tepat
"Stored property in actor is mutable"	OK kalau private, refactor kalau public

Fase 3: Refactor Bertahap per Module

Aktifkan strict di module dependency lebih dulu (core, utility), lalu naik ke app shell.

Core → Networking → Repository → Service → ViewModel → App

Fase 4: Hapus @preconcurrency Bertahap

@preconcurrency adalah suppresor warning sementara untuk import API legacy. Saat upstream sudah Sendable-ready, hapus.

// Sementara
@preconcurrency import OldFramework

// Setelah upstream di-update
import OldFramework

Fase 5: Strict di CI

Setelah project bersih, jadikan strict checking sebagai CI gate.

# CI: kalau build menghasilkan warning concurrency, fail
- run: swift build -Xswiftc -warnings-as-errors

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