Adding upstream version 0.0~git20250520.a1d9079+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

internal/sdkpath/sdkpath.go

@@ -0,0 +1,89 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package sdkpath provides functions for locating the Android SDK.
+// These functions respect the ANDROID_HOME environment variable, and
+// otherwise use the default SDK location.
+package sdkpath
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strconv"
+	"strings"
+)
+
+// AndroidHome returns the absolute path of the selected Android SDK,
+// if one can be found.
+func AndroidHome() (string, error) {
+	androidHome := os.Getenv("ANDROID_HOME")
+	if androidHome == "" {
+		home, err := os.UserHomeDir()
+		if err != nil {
+			return "", err
+		}
+		switch runtime.GOOS {
+		case "windows":
+			// See https://android.googlesource.com/platform/tools/adt/idea/+/85b4bfb7a10ad858a30ffa4003085b54f9424087/native/installer/win/setup_android_studio.nsi#100
+			androidHome = filepath.Join(home, "AppData", "Local", "Android", "sdk")
+		case "darwin":
+			// See https://android.googlesource.com/platform/tools/asuite/+/67e0cd9604379e9663df57f16a318d76423c0aa8/aidegen/lib/ide_util.py#88
+			androidHome = filepath.Join(home, "Library", "Android", "sdk")
+		default: // Linux, BSDs, etc.
+			// See LINUX_ANDROID_SDK_PATH in ide_util.py above.
+			androidHome = filepath.Join(home, "Android", "Sdk")
+		}
+	}
+	if info, err := os.Stat(androidHome); err != nil {
+		return "", fmt.Errorf("%w; Android SDK was not found at %s", err, androidHome)
+	} else if !info.IsDir() {
+		return "", fmt.Errorf("%s is not a directory", androidHome)
+	}
+	return androidHome, nil
+}
+
+// AndroidAPIPath returns an android SDK platform directory within the configured SDK.
+// If there are multiple platforms that satisfy the minimum version requirement,
+// AndroidAPIPath returns the latest one among them.
+func AndroidAPIPath(api int) (string, error) {
+	sdk, err := AndroidHome()
+	if err != nil {
+		return "", err
+	}
+	sdkDir, err := os.Open(filepath.Join(sdk, "platforms"))
+	if err != nil {
+		return "", fmt.Errorf("failed to find android SDK platform: %w", err)
+	}
+	defer sdkDir.Close()
+	fis, err := sdkDir.Readdir(-1)
+	if err != nil {
+		return "", fmt.Errorf("failed to find android SDK platform (API level: %d): %w", api, err)
+	}
+
+	var apiPath string
+	var apiVer int
+	for _, fi := range fis {
+		name := fi.Name()
+		if !strings.HasPrefix(name, "android-") {
+			continue
+		}
+		n, err := strconv.Atoi(name[len("android-"):])
+		if err != nil || n < api {
+			continue
+		}
+		p := filepath.Join(sdkDir.Name(), name)
+		_, err = os.Stat(filepath.Join(p, "android.jar"))
+		if err == nil && apiVer < n {
+			apiPath = p
+			apiVer = n
+		}
+	}
+	if apiVer == 0 {
+		return "", fmt.Errorf("failed to find android SDK platform (API level: %d) in %s",
+			api, sdkDir.Name())
+	}
+	return apiPath, nil
+}