Cache XCFramework build

.buildkite/commands/build-xcframework.sh

@@ -0,0 +1,43 @@
+#!/bin/bash -eu
+
+echo "--- :rust: Installing Rust"
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -v -y
+
+source "/Users/builder/.cargo/env"
+
+CACHE_DATE=$(date +%V-%y)
+
+echo "--- :package: Installing Rust Toolchains"
+make setup-rust
+
+BUILD_CACHE_KEY="wprs-xcframework-cache-${CACHE_DATE}"
+HAS_CACHE=false
+
+echo "--- :swift: Building xcframework"
+echo "Using cache key: $BUILD_CACHE_KEY"
+restore_cache "${BUILD_CACHE_KEY}"
+
+# Use Apple Archiver because it's way faster
+if [[ -f "wprs-build-cache" ]]; then
+    HAS_CACHE=true
+
+    echo "Extracting from build cache"
+    aa extract -i wprs-build-cache.aar
+fi
+
+make xcframework
+zip -r target/libwordpressFFI.xcframework.zip target/libwordpressFFI.xcframework
+
+# Remove huge files that we can rebuild quickly.
+# This brings the cache size from 49GB down to 33GB.
+find "." -type f -name "libwp_api.*" -exec rm -v {} +
+find "." -type f -name "libwordpress.a" -exec rm -v {} +
+
+# if [ "$HAS_CACHE" = false ]; then
+echo "Building Cache"
+# Use Apple Archiver because it's way faster
+aa archive -D target -o wprs-build-cache.aar
+stat wprs-build-cache.aar
+save_cache ./wprs-build-cache.aar "${BUILD_CACHE_KEY}" --force
+rm wprs-build-cache.aar
+# fi

.buildkite/pipeline.yml

@@ -60,24 +60,14 @@ steps:
     steps:
       - label: ":swift: :darwin: Build xcframework"
         key: "xcframework"
-        command: |
-          echo "--- :rust: Installing Rust"
-          curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -v -y
-
-          source "/Users/builder/.cargo/env"
-
-          echo "--- :package: Installing Rust Toolchains"
-          make setup-rust
-
-          echo "--- :swift: Building xcframework"
-          make xcframework
-          zip -r target/libwordpressFFI.xcframework.zip target/libwordpressFFI.xcframework
+        command: ".buildkite/commands/build-xcframework.sh"
         artifact_paths:
           - target/libwordpressFFI.xcframework.zip
           - native/swift/Sources/wordpress-api-wrapper/wp_api.swift
           - native/swift/Sources/wordpress-api-wrapper/wp_localization.swift
           - native/swift/Sources/wordpress-api-wrapper/wp_com.swift
           - native/swift/Sources/wordpress-api-wrapper/jetpack.swift
+        plugins: [$CI_TOOLKIT]
         agents:
           queue: mac
       - label: ":swift: Build Docs"

.buildkite/release.sh

@@ -21,8 +21,9 @@ make setup-rust
 echo "--- :rubygems: Setting up Gems"
 install_gems
 
-echo "--- :rust: Building XCFramework"
-make xcframework-package
+echo "--- :rust: Preparing XCFramework"
+.buildkite/download-xcframework.sh
+make xcframework-package-only
 make xcframework-package-checksum
 
 release_version="$1"

Makefile

@@ -130,7 +130,9 @@ else
 xcframework: xcframework-all
 endif
 
-xcframework-package: xcframework-all
+xcframework-package: xcframework-all xcframework-package-only
+
+xcframework-package-only:
 	rm -rf libwordpressFFI.xcframework.zip
 	ditto -c -k --sequesterRsrc --keepParent target/libwordpressFFI.xcframework/ libwordpressFFI.xcframework.zip