release: Backport workflow refactor

cmd/internal/merge_apple_xcframework/main.go

@@ -0,0 +1,172 @@
+package main
+
+import (
+	"flag"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"sort"
+	"strconv"
+	"strings"
+
+	"github.com/sagernet/sing-box/log"
+	E "github.com/sagernet/sing/common/exceptions"
+
+	"howett.net/plist"
+)
+
+type xcFrameworkInfo struct {
+	AvailableLibraries []xcFrameworkLibrary `plist:"AvailableLibraries"`
+}
+
+type xcFrameworkLibrary struct {
+	BinaryPath               string   `plist:"BinaryPath"`
+	LibraryIdentifier        string   `plist:"LibraryIdentifier"`
+	LibraryPath              string   `plist:"LibraryPath"`
+	SupportedArchitectures   []string `plist:"SupportedArchitectures"`
+	SupportedPlatform        string   `plist:"SupportedPlatform"`
+	SupportedPlatformVariant string   `plist:"SupportedPlatformVariant"`
+}
+
+type frameworkSlice struct {
+	rootPath string
+	library  xcFrameworkLibrary
+}
+
+var outputPath string
+
+func init() {
+	flag.StringVar(&outputPath, "output", "", "output XCFramework path")
+}
+
+func main() {
+	flag.Parse()
+	err := merge()
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+func merge() error {
+	inputPaths := flag.Args()
+	if outputPath == "" {
+		return E.New("missing output path")
+	}
+	if len(inputPaths) == 0 {
+		return E.New("missing input XCFramework paths")
+	}
+	frameworkGroups := make(map[string][]frameworkSlice)
+	for _, inputPath := range inputPaths {
+		infoFile, err := os.Open(filepath.Join(inputPath, "Info.plist"))
+		if err != nil {
+			return E.Cause(err, "open XCFramework metadata: ", inputPath)
+		}
+		var info xcFrameworkInfo
+		decoder := plist.NewDecoder(infoFile)
+		err = decoder.Decode(&info)
+		closeErr := infoFile.Close()
+		if err != nil {
+			return E.Cause(err, "decode XCFramework metadata: ", inputPath)
+		}
+		if closeErr != nil {
+			return E.Cause(closeErr, "close XCFramework metadata: ", inputPath)
+		}
+		for _, library := range info.AvailableLibraries {
+			groupName := library.SupportedPlatform + "|" + library.SupportedPlatformVariant
+			frameworkGroups[groupName] = append(frameworkGroups[groupName], frameworkSlice{
+				rootPath: inputPath,
+				library:  library,
+			})
+		}
+	}
+	groupNames := make([]string, 0, len(frameworkGroups))
+	for groupName := range frameworkGroups {
+		groupNames = append(groupNames, groupName)
+	}
+	sort.Strings(groupNames)
+	absoluteOutputPath, err := filepath.Abs(outputPath)
+	if err != nil {
+		return E.Cause(err, "resolve output XCFramework path")
+	}
+	err = os.MkdirAll(filepath.Dir(absoluteOutputPath), 0o755)
+	if err != nil {
+		return E.Cause(err, "create output XCFramework directory")
+	}
+	temporaryDirectory, err := os.MkdirTemp(filepath.Dir(absoluteOutputPath), ".merge-xcframework-*")
+	if err != nil {
+		return E.Cause(err, "create XCFramework merge directory")
+	}
+	defer os.RemoveAll(temporaryDirectory)
+	frameworkPaths := make([]string, 0, len(groupNames))
+	for groupIndex, groupName := range groupNames {
+		frameworkSlices := frameworkGroups[groupName]
+		firstSlice := frameworkSlices[0]
+		firstFrameworkPath := filepath.Join(firstSlice.rootPath, firstSlice.library.LibraryIdentifier, firstSlice.library.LibraryPath)
+		if len(frameworkSlices) == 1 {
+			frameworkPaths = append(frameworkPaths, firstFrameworkPath)
+			continue
+		}
+		architectures := make(map[string]bool)
+		binaryPaths := make([]string, 0, len(frameworkSlices))
+		for _, currentSlice := range frameworkSlices {
+			if currentSlice.library.LibraryPath != firstSlice.library.LibraryPath || currentSlice.library.BinaryPath != firstSlice.library.BinaryPath {
+				return E.New("incompatible XCFramework slices for platform: ", currentSlice.library.SupportedPlatform)
+			}
+			for _, architecture := range currentSlice.library.SupportedArchitectures {
+				if architectures[architecture] {
+					return E.New("duplicate XCFramework architecture: ", architecture)
+				}
+				architectures[architecture] = true
+			}
+			binaryPaths = append(binaryPaths, filepath.Join(currentSlice.rootPath, currentSlice.library.LibraryIdentifier, currentSlice.library.BinaryPath))
+		}
+		mergedFrameworkPath := filepath.Join(temporaryDirectory, "framework-"+strconv.Itoa(groupIndex), filepath.Base(firstSlice.library.LibraryPath))
+		copyCommand := exec.Command("ditto", firstFrameworkPath, mergedFrameworkPath)
+		copyCommand.Stdout = os.Stdout
+		copyCommand.Stderr = os.Stderr
+		err = copyCommand.Run()
+		if err != nil {
+			return E.Cause(err, "copy XCFramework slice")
+		}
+		binaryRelativePath, relativeErr := filepath.Rel(firstSlice.library.LibraryPath, firstSlice.library.BinaryPath)
+		if relativeErr != nil {
+			return E.Cause(relativeErr, "resolve XCFramework binary path")
+		}
+		if binaryRelativePath == "." || strings.HasPrefix(binaryRelativePath, ".."+string(filepath.Separator)) {
+			return E.New("invalid XCFramework binary path: ", firstSlice.library.BinaryPath)
+		}
+		mergedBinaryPath := filepath.Join(mergedFrameworkPath, binaryRelativePath)
+		temporaryBinaryPath := mergedBinaryPath + ".merged"
+		lipoArguments := append([]string{"lipo", "-create"}, binaryPaths...)
+		lipoArguments = append(lipoArguments, "-output", temporaryBinaryPath)
+		lipoCommand := exec.Command("xcrun", lipoArguments...)
+		lipoCommand.Stdout = os.Stdout
+		lipoCommand.Stderr = os.Stderr
+		err = lipoCommand.Run()
+		if err != nil {
+			return E.Cause(err, "merge XCFramework binaries")
+		}
+		err = os.Rename(temporaryBinaryPath, mergedBinaryPath)
+		if err != nil {
+			return E.Cause(err, "replace merged XCFramework binary")
+		}
+		frameworkPaths = append(frameworkPaths, mergedFrameworkPath)
+	}
+	err = os.RemoveAll(absoluteOutputPath)
+	if err != nil {
+		return E.Cause(err, "remove output XCFramework")
+	}
+	xcodebuildArguments := []string{"-create-xcframework"}
+	for _, frameworkPath := range frameworkPaths {
+		xcodebuildArguments = append(xcodebuildArguments, "-framework", frameworkPath)
+	}
+	xcodebuildArguments = append(xcodebuildArguments, "-output", absoluteOutputPath)
+	xcodebuildCommand := exec.Command("xcodebuild", xcodebuildArguments...)
+	xcodebuildCommand.Stdout = os.Stdout
+	xcodebuildCommand.Stderr = os.Stderr
+	err = xcodebuildCommand.Run()
+	if err != nil {
+		return E.Cause(err, "create XCFramework")
+	}
+	return nil
+}