Makefile: add command to start emulator

Signed-off-by: kari-ts <[email protected]>

Makefile

@@ -69,6 +69,36 @@ export GOBIN
 export PATH := $(PWD)/tool:$(GOBIN):$(JAVA_HOME)/bin:$(ANDROID_HOME)/cmdline-tools/latest/bin:$(ANDROID_HOME)/platform-tools:$(PATH)
 export GOROOT := # Unset
 
+base_image := "system-images;android-33;google_apis;"
+AVD := "tailscale-android"
+
+select-image:
+ @echo "Determining machine architecture..."
+ $(eval machine_arch := $(shell uname -m))
+ @if [ "$(machine_arch)" = "x86_64" ]; then \
+ echo "Using x86_64 system image"; \
+ AVD_IMAGE="$(base_image)x86_64"; \
+ elif [ "$(machine_arch)" = "aarch64" ]; then \
+ echo "Checking for ARM64 v8a system image..."; \
+ $(eval arm64_v8a_exists := $(shell $(ANDROID_HOME)/cmdline-tools/latest/bin/sdkmanager --list | grep -q "arm64-v8a" && echo yes)) \
+ if [ "$(arm64_v8a_exists)" = "yes" ]; then \
+ echo "Selected ARM64 v8a System Image"; \
+ AVD_IMAGE="$(base_image)arm64-v8a"; \
+ else \
+ echo "ARM64 v8a system image not available, defaulting to x86_64"; \
+ AVD_IMAGE="$(base_image)x86_64"; \
+ fi; \
+ else \
+ echo "Unsupported architecture: $(machine_arch)"; \
+ exit 1; \
+ fi; \
+ echo "Fallback to system architecture: $$AVD_IMAGE"; \
+ export AVD_IMAGE=$$AVD_IMAGE;
+
+all: select-image
+ @echo "Using AVD Image: $(AVD_IMAGE)"
+ @echo "AVD set to: $(AVD)"
+
 all: tailscale-debug.apk test $(DEBUG_APK) ## Build and test everything
 
 env:
@@ -147,7 +177,7 @@ $(LIBTAILSCALE): Makefile android/libs $(LIBTAILSCALE_SOURCES) $(GOBIN)/gomobile
  -ldflags "$(FULL_LDFLAGS)" \
  -o $@ ./libtailscale
 
-libtailscale: $(LIBTAILSCALE)
+libtailscale: $(LIBTAILSCALE) ## Build libtailscale
 
 ANDROID_SOURCES=$(shell find android -type f -not -path "android/build/*" -not -path '*/.*')
 DEBUG_INTERMEDIARY = android/build/outputs/apk/debug/android-debug.apk
@@ -166,12 +196,33 @@ ANDROID_TEST_INTERMEDIARY=./android/build/outputs/apk/androidTest/applicationTes
 $(ANDROID_TEST_INTERMEDIARY): $(ANDROID_SOURCES) $(LIBTAILSCALE)
  cd android && ./gradlew assembleApplicationTestAndroidTest
 
-tailscale-test.apk: $(ANDROID_TEST_INTERMEDIARY)
+tailscale-test.apk: $(ANDROID_TEST_INTERMEDIARY) ## Build the test APK
  mv $(ANDROID_TEST_INTERMEDIARY) $@
 
 test: $(LIBTAILSCALE) ## Run the Android tests
  (cd android && ./gradlew test)
 
+emulator: select-image
+ @echo "Checking installed SDK packages..."
+ @if ! $(ANDROID_HOME)/cmdline-tools/latest/bin/sdkmanager --list_installed | grep -q "$(AVD_IMAGE)"; then \
+ echo "$(AVD_IMAGE) not found, installing..."; \
+ $(ANDROID_HOME)/cmdline-tools/latest/bin/sdkmanager "$(AVD_IMAGE)"; \
+ fi
+ @echo "Checking if AVD exists..."
+ @if ! $(ANDROID_HOME)/cmdline-tools/latest/bin/avdmanager list avd | grep -q "$(AVD)"; then \
+ echo "AVD $(AVD) not found, creating..."; \
+ $(ANDROID_HOME)/cmdline-tools/latest/bin/avdmanager create avd -n "$(AVD)" -k "$(AVD_IMAGE)"; \
+ fi
+ @echo "Starting emulator..."
+ @$(ANDROID_HOME)/emulator/emulator -avd "$(AVD)" -logcat-output /dev/stdout -netdelay none -netspeed full &
+ @echo "Waiting for emulator to fully boot..."
+ @$(ANDROID_HOME)/platform-tools/adb wait-for-device
+ @echo "Emulator booted, installing APK..."
+ @$(ANDROID_HOME)/platform-tools/adb install -r tailscale-debug.apk
+ @echo "APK installed, launching app..."
+ @$(ANDROID_HOME)/platform-tools/adb shell am start -n "com.tailscale.ipn/com.tailscale.ipn.MainActivity"
+ @echo "Tailscale launched."
+
 install: tailscale-debug.apk ## Install the debug APK on a connected device
  adb install -r $<