12. Tips: Caching, Mirror, Registry

CI Build Cache

Di CI (GitHub Actions, Xcode Cloud), cache folder berikut untuk speedup:

swift
# GitHub Actions example
- uses: actions/cache@v3
  with:
    path: |
      ~/Library/Caches/org.swift.swiftpm
      .build
    key: ${{ runner.os }}-spm-${{ hashFiles('**/Package.resolved') }}

Key dari Package.resolved hash → invalidasi cache otomatis saat dependency berubah.

Dependency Mirror

Untuk perusahaan dengan firewall ketat atau ingin mirror dependency:

swift

# Setup mirror dari github.com/apple/swift-collections ke internal Git server
swift package config set-mirror \
    --original-url https://github.com/apple/swift-collections.git \
    --mirror-url https://git.company.com/mirrors/swift-collections.git

Package Registry (Swift 5.7+)

Alternatif git-based dependency: registry yang mirip npm/PyPI.

swift
// swift-tools-version: 5.7
dependencies: [
    .package(id: "apple.swift-collections", from: "1.0.0"),
]

Configure registry:

swift

swift package-registry set https://registry.company.com

Manfaat: lebih cepat (tarball vs git clone), bisa di-cache di binary, otorisasi enterprise.

Offline Build

swift

# Resolve sekali saat online
swift package resolve

# Build offline (gunakan checkouts yang sudah ada)
swift build --skip-update