tools/android/android_sdk_repository_template.bzl - bazel - Git at Google

 """Template for the build file used in android_sdk_repository."""
 # Copyright 2016 The Bazel Authors. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #    http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.

 load("@rules_java//java:defs.bzl", "java_binary", "java_import")

 def create_config_setting_rule():
     """Create config_setting rule for windows.

     These represent the matching --host_cpu values.
     """
     name = "windows"
     if not native.existing_rule(name):
         native.config_setting(
             name = name,
             values = {"host_cpu": "x64_" + name},
         )

     native.config_setting(
         name = "d8_standalone_dexer",
         values = {"define": "android_standalone_dexing_tool=d8_compat_dx"},
     )

     native.config_setting(
         name = "dx_standalone_dexer",
         values = {"define": "android_standalone_dexing_tool=dx_compat_dx"},
     )

 def create_android_sdk_rules(
         name,
         build_tools_version,
         build_tools_directory,
         api_levels,
         default_api_level):
     """Generate android_sdk rules for the API levels in the Android SDK.

     Args:
       name: string, the name of the repository being generated.
       build_tools_version: string, the version of Android's build tools to use.
       build_tools_directory: string, the directory name of the build tools in
           sdk's build-tools directory.
       api_levels: list of ints, the API levels from which to get android.jar
           et al. and create android_sdk rules.
       default_api_level: int, the API level to alias the default sdk to if
           --android_sdk is not specified on the command line.
     """

     create_config_setting_rule()

     windows_only_files = [
         "build-tools/%s/aapt.exe" % build_tools_directory,
         "build-tools/%s/aidl.exe" % build_tools_directory,
         "build-tools/%s/zipalign.exe" % build_tools_directory,
         "platform-tools/adb.exe",
     ] + native.glob(
         ["build-tools/%s/aapt2.exe" % build_tools_directory],
         allow_empty = True,
     )

     linux_only_files = [
         "build-tools/%s/aapt" % build_tools_directory,
         "build-tools/%s/aidl" % build_tools_directory,
         "build-tools/%s/zipalign" % build_tools_directory,
         "platform-tools/adb",
     ] + native.glob(
         ["extras", "build-tools/%s/aapt2" % build_tools_directory],
         exclude_directories = 0,
         allow_empty = True,
     )

     # This filegroup is used to pass the minimal contents of the SDK to the
     # Android integration tests. Note that in order to work on Windows, we cannot
     # include directories and must keep the size small.
     native.filegroup(
         name = "files",
         srcs = [
             "build-tools/%s/lib/apksigner.jar" % build_tools_directory,
             "build-tools/%s/lib/dx.jar" % build_tools_directory,
             "build-tools/%s/mainDexClasses.rules" % build_tools_directory,
         ] + [
             "platforms/android-%d/%s" % (api_level, filename)
             for api_level in api_levels
             for filename in ["android.jar", "framework.aidl"]
         ] + select({
             ":windows": windows_only_files,
             "//conditions:default": linux_only_files,
         }),
     )

     for api_level in api_levels:
         if api_level >= 23:
             # Android 23 removed most of org.apache.http from android.jar and moved it
             # to a separate jar.
             java_import(
                 name = "org_apache_http_legacy-%d" % api_level,
                 jars = ["platforms/android-%d/optional/org.apache.http.legacy.jar" % api_level],
             )

         if api_level >= 28:
             # Android 28 removed most of android.test from android.jar and moved it
             # to separate jars.
             java_import(
                 name = "legacy_test-%d" % api_level,
                 jars = [
                     "platforms/android-%d/optional/android.test.base.jar" % api_level,
                     "platforms/android-%d/optional/android.test.mock.jar" % api_level,
                     "platforms/android-%d/optional/android.test.runner.jar" % api_level,
                 ],
                 neverlink = 1,
             )

         native.android_sdk(
             name = "sdk-%d" % api_level,
             build_tools_version = build_tools_version,
             proguard = "@bazel_tools//tools/jdk:proguard",
             aapt = select({
                 ":windows": "build-tools/%s/aapt.exe" % build_tools_directory,
                 "//conditions:default": ":aapt_binary",
             }),
             aapt2 = select({
                 ":windows": "build-tools/%s/aapt2.exe" % build_tools_directory,
                 "//conditions:default": ":aapt2_binary",
             }),
             dx = select({
                 "d8_standalone_dexer": ":d8_compat_dx",
                 "dx_standalone_dexer": ":dx_binary",
                 "//conditions:default": ":dx_binary",
             }),
             main_dex_list_creator = ":main_dex_list_creator",
             adb = select({
                 ":windows": "platform-tools/adb.exe",
                 "//conditions:default": "platform-tools/adb",
             }),
             framework_aidl = "platforms/android-%d/framework.aidl" % api_level,
             aidl = select({
                 ":windows": "build-tools/%s/aidl.exe" % build_tools_directory,
                 "//conditions:default": ":aidl_binary",
             }),
             android_jar = "platforms/android-%d/android.jar" % api_level,
             shrinked_android_jar = "platforms/android-%d/android.jar" % api_level,
             main_dex_classes = "build-tools/%s/mainDexClasses.rules" % build_tools_directory,
             apksigner = ":apksigner",
             zipalign = select({
                 ":windows": "build-tools/%s/zipalign.exe" % build_tools_directory,
                 "//conditions:default": ":zipalign_binary",
             }),
             # See https://github.com/bazelbuild/bazel/issues/8757
             tags = ["__ANDROID_RULES_MIGRATION__"],
         )

     native.alias(
         name = "org_apache_http_legacy",
         actual = ":org_apache_http_legacy-%d" % default_api_level,
     )

     native.alias(
         name = "sdk",
         actual = ":sdk-%d" % default_api_level,
     )
     java_binary(
         name = "apksigner",
         main_class = "com.android.apksigner.ApkSignerTool",
         runtime_deps = ["build-tools/%s/lib/apksigner.jar" % build_tools_directory],
     )

     native.filegroup(
         name = "build_tools_libs",
         srcs = native.glob([
             "build-tools/%s/lib/**" % build_tools_directory,
             # Build tools version 24.0.0 added a lib64 folder.
             "build-tools/%s/lib64/**" % build_tools_directory,
         ]),
     )

     for tool in ["aapt", "aapt2", "aidl", "zipalign"]:
         native.genrule(
             name = tool + "_runner",
             outs = [tool + "_runner.sh"],
             srcs = [],
             cmd = "\n".join([
                 "cat > $@ << 'EOF'",
                 "#!/bin/bash",
                 "set -eu",
                 # The tools under build-tools/VERSION require the libraries under
                 # build-tools/VERSION/lib, so we can't simply depend on them as a
                 # file like we do with aapt.
                 # On Windows however we can use these binaries directly because
                 # there's no runfiles support so Bazel just creates a junction to
                 # {SDK}/build-tools.
                 "SDK=$${0}.runfiles/%s" % name,
                 # If $${SDK} is not a directory, it means that this tool is running
                 # from a runfiles directory, in the case of
                 # android_instrumentation_test. Hence, use the androidsdk
                 # that's already present in the runfiles of the current context.
                 "if [[ ! -d $${SDK} ]] ; then",
                 "  SDK=$$(pwd)/../%s" % name,
                 "fi",
                 "exec $${SDK}/build-tools/%s/%s $$*" % (build_tools_directory, tool),
                 "EOF\n",
             ]),
         )

         native.sh_binary(
             name = tool + "_binary",
             srcs = [tool + "_runner.sh"],
             data = [
                 ":build_tools_libs",
                 "build-tools/%s/%s" % (build_tools_directory, tool),
             ],
         )

     native.sh_binary(
         name = "fail",
         srcs = select({
             ":windows": [":generate_fail_cmd"],
             "//conditions:default": [":generate_fail_sh"],
         }),
     )

     native.genrule(
         name = "generate_fail_sh",
         executable = 1,
         outs = ["fail.sh"],
         cmd = "echo -e '#!/bin/bash\\nexit 1' >> $@; chmod +x $@",
     )

     native.genrule(
         name = "generate_fail_cmd",
         executable = 1,
         outs = ["fail.cmd"],
         cmd = "echo @exit /b 1 > $@",
     )

     native.genrule(
         name = "main_dex_list_creator_source",
         srcs = [],
         outs = ["main_dex_list_creator.sh"],
         cmd = "\n".join([
             "cat > $@ <<'EOF'",
             "#!/bin/bash",
             "",
             "MAIN_DEX_LIST=$$1",
             "STRIPPED_JAR=$$2",
             "JAR=$$3",
             "" +
             "JAVA_BINARY=$$0.runfiles/%s/main_dex_list_creator_java" % name,
             "$$JAVA_BINARY $$STRIPPED_JAR $$JAR > $$MAIN_DEX_LIST",
             "exit $$?",
             "",
             "EOF\n",
         ]),
     )

     native.sh_binary(
         name = "main_dex_list_creator",
         srcs = ["main_dex_list_creator.sh"],
         data = [":main_dex_list_creator_java"],
     )
     java_binary(
         name = "main_dex_list_creator_java",
         main_class = "com.android.multidex.ClassReferenceListBuilder",
         runtime_deps = [":dx_jar_import"],
     )
     java_binary(
         name = "dx_binary",
         main_class = "com.android.dx.command.Main",
         runtime_deps = [":dx_jar_import"],
     )
     java_import(
         name = "dx_jar_import",
         jars = ["build-tools/%s/lib/dx.jar" % build_tools_directory],
     )
     java_binary(
         name = "d8_compat_dx",
         main_class = "com.android.tools.r8.compatdx.CompatDx",
         runtime_deps = [":d8_jar_import"],
     )
     java_import(
         name = "d8_jar_import",
         jars = ["build-tools/%s/lib/d8.jar" % build_tools_directory],
     )

 TAGDIR_TO_TAG_MAP = {
     "google_apis_playstore": "playstore",
     "google_apis": "google",
     "default": "android",
     "android-tv": "tv",
     "android-wear": "wear",
 }

 ARCHDIR_TO_ARCH_MAP = {
     "x86": "x86",
     "armeabi-v7a": "arm",
 }

 def create_system_images_filegroups(system_image_dirs):
     """Generate filegroups for the system images in the Android SDK.

     Args:
       system_image_dirs: list of strings, the directories containing system image
           files to be used to create android_device rules.
     """

     # These images will need to be updated as Android releases new system images.
     # We are intentionally not adding future releases because there is no
     # guarantee that they will work out of the box. Supported system images should
     # be added here once they have been confirmed to work with the Bazel Android
     # testing infrastructure.
     system_images = [
         (tag, str(api), arch)
         for tag in ["android", "google"]
         for api in [10] + list(range(15, 20)) + list(range(21, 30))
         for arch in ("x86", "arm")
     ] + [
         ("playstore", str(api), "x86")
         for api in list(range(24, 30))
     ]
     tv_images = [
         ("tv", str(api), "x86")
         for api in range(21, 30)
     ] + [
         ("tv", "21", "arm"),
         ("tv", "23", "arm"),
     ]
     wear_images = [
         ("wear", str(api), "x86")
         for api in [23, 25, 26, 28]
     ] + [
         ("wear", str(api), "arm")
         for api in [23, 25]
     ]
     supported_system_images = system_images + tv_images + wear_images

     installed_system_images_dirs = {}
     for system_image_dir in system_image_dirs:
         apidir, tagdir, archdir = system_image_dir.split("/")[1:]
         if "-" not in apidir:
             continue
         api = apidir.split("-")[1]  # "android-24" --> "24", "android-O" --> "O"
         if tagdir not in TAGDIR_TO_TAG_MAP:
             continue
         tag = TAGDIR_TO_TAG_MAP[tagdir]
         if archdir not in ARCHDIR_TO_ARCH_MAP:
             continue
         arch = ARCHDIR_TO_ARCH_MAP[archdir]
         if (tag, api, arch) in supported_system_images:
             name = "emulator_images_%s_%s_%s" % (tag, api, arch)
             installed_system_images_dirs[name] = system_image_dir
         else:
             # TODO(bazel-team): If the user has an unsupported system image installed,
             # should we print a warning? This includes all 64-bit system-images.
             pass

     for (tag, api, arch) in supported_system_images:
         name = "emulator_images_%s_%s_%s" % (tag, api, arch)
         if name in installed_system_images_dirs:
             system_image_dir = installed_system_images_dirs[name]

             # For supported system images that exist in /sdk/system-images/, we
             # create a filegroup with their contents.
             native.filegroup(
                 name = name,
                 srcs = native.glob([
                     "%s/**" % system_image_dir,
                 ]),
             )
             native.filegroup(
                 name = "%s_qemu2_extra" % name,
                 srcs = native.glob(["%s/kernel-ranchu" % system_image_dir]),
             )
         else:
             # For supported system images that are not installed in the SDK, we
             # create a "poison pill" genrule to display a helpful error message to
             # a user who attempts to run a test against an android_device that
             # they don't have the system image for installed.
             native.genrule(
                 name = name,
                 outs = [
                     # Necessary so that the build doesn't fail in analysis because
                     # android_device expects a file named source.properties.
                     "poison_pill_for_%s/source.properties" % name,
                 ],
                 cmd = """echo \
           This rule requires that the Android SDK used by Bazel has the \
           following system image installed: %s. Please install this system \
           image through the Android SDK Manager and try again. ; \
           exit 1
           """ % name,
             )
             native.filegroup(
                 name = "%s_qemu2_extra" % name,
                 srcs = [],
             )
	"""Template for the build file used in android_sdk_repository."""
	# Copyright 2016 The Bazel Authors. All rights reserved.
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.

	load("@rules_java//java:defs.bzl", "java_binary", "java_import")

	def create_config_setting_rule():
	"""Create config_setting rule for windows.

	These represent the matching --host_cpu values.
	"""
	name = "windows"
	if not native.existing_rule(name):
	native.config_setting(
	name = name,
	values = {"host_cpu": "x64_" + name},
	)

	native.config_setting(
	name = "d8_standalone_dexer",
	values = {"define": "android_standalone_dexing_tool=d8_compat_dx"},
	)

	native.config_setting(
	name = "dx_standalone_dexer",
	values = {"define": "android_standalone_dexing_tool=dx_compat_dx"},
	)

	def create_android_sdk_rules(
	name,
	build_tools_version,
	build_tools_directory,
	api_levels,
	default_api_level):
	"""Generate android_sdk rules for the API levels in the Android SDK.

	Args:
	name: string, the name of the repository being generated.
	build_tools_version: string, the version of Android's build tools to use.
	build_tools_directory: string, the directory name of the build tools in
	sdk's build-tools directory.
	api_levels: list of ints, the API levels from which to get android.jar
	et al. and create android_sdk rules.
	default_api_level: int, the API level to alias the default sdk to if
	--android_sdk is not specified on the command line.
	"""

	create_config_setting_rule()

	windows_only_files = [
	"build-tools/%s/aapt.exe" % build_tools_directory,
	"build-tools/%s/aidl.exe" % build_tools_directory,
	"build-tools/%s/zipalign.exe" % build_tools_directory,
	"platform-tools/adb.exe",
	] + native.glob(
	["build-tools/%s/aapt2.exe" % build_tools_directory],
	allow_empty = True,
	)

	linux_only_files = [
	"build-tools/%s/aapt" % build_tools_directory,
	"build-tools/%s/aidl" % build_tools_directory,
	"build-tools/%s/zipalign" % build_tools_directory,
	"platform-tools/adb",
	] + native.glob(
	["extras", "build-tools/%s/aapt2" % build_tools_directory],
	exclude_directories = 0,
	allow_empty = True,
	)

	# This filegroup is used to pass the minimal contents of the SDK to the
	# Android integration tests. Note that in order to work on Windows, we cannot
	# include directories and must keep the size small.
	native.filegroup(
	name = "files",
	srcs = [
	"build-tools/%s/lib/apksigner.jar" % build_tools_directory,
	"build-tools/%s/lib/dx.jar" % build_tools_directory,
	"build-tools/%s/mainDexClasses.rules" % build_tools_directory,
	] + [
	"platforms/android-%d/%s" % (api_level, filename)
	for api_level in api_levels
	for filename in ["android.jar", "framework.aidl"]
	] + select({
	":windows": windows_only_files,
	"//conditions:default": linux_only_files,
	}),
	)

	for api_level in api_levels:
	if api_level >= 23:
	# Android 23 removed most of org.apache.http from android.jar and moved it
	# to a separate jar.
	java_import(
	name = "org_apache_http_legacy-%d" % api_level,
	jars = ["platforms/android-%d/optional/org.apache.http.legacy.jar" % api_level],
	)

	if api_level >= 28:
	# Android 28 removed most of android.test from android.jar and moved it
	# to separate jars.
	java_import(
	name = "legacy_test-%d" % api_level,
	jars = [
	"platforms/android-%d/optional/android.test.base.jar" % api_level,
	"platforms/android-%d/optional/android.test.mock.jar" % api_level,
	"platforms/android-%d/optional/android.test.runner.jar" % api_level,
	],
	neverlink = 1,
	)

	native.android_sdk(
	name = "sdk-%d" % api_level,
	build_tools_version = build_tools_version,
	proguard = "@bazel_tools//tools/jdk:proguard",
	aapt = select({
	":windows": "build-tools/%s/aapt.exe" % build_tools_directory,
	"//conditions:default": ":aapt_binary",
	}),
	aapt2 = select({
	":windows": "build-tools/%s/aapt2.exe" % build_tools_directory,
	"//conditions:default": ":aapt2_binary",
	}),
	dx = select({
	"d8_standalone_dexer": ":d8_compat_dx",
	"dx_standalone_dexer": ":dx_binary",
	"//conditions:default": ":dx_binary",
	}),
	main_dex_list_creator = ":main_dex_list_creator",
	adb = select({
	":windows": "platform-tools/adb.exe",
	"//conditions:default": "platform-tools/adb",
	}),
	framework_aidl = "platforms/android-%d/framework.aidl" % api_level,
	aidl = select({
	":windows": "build-tools/%s/aidl.exe" % build_tools_directory,
	"//conditions:default": ":aidl_binary",
	}),
	android_jar = "platforms/android-%d/android.jar" % api_level,
	shrinked_android_jar = "platforms/android-%d/android.jar" % api_level,
	main_dex_classes = "build-tools/%s/mainDexClasses.rules" % build_tools_directory,
	apksigner = ":apksigner",
	zipalign = select({
	":windows": "build-tools/%s/zipalign.exe" % build_tools_directory,
	"//conditions:default": ":zipalign_binary",
	}),
	# See https://github.com/bazelbuild/bazel/issues/8757
	tags = ["__ANDROID_RULES_MIGRATION__"],
	)

	native.alias(
	name = "org_apache_http_legacy",
	actual = ":org_apache_http_legacy-%d" % default_api_level,
	)

	native.alias(
	name = "sdk",
	actual = ":sdk-%d" % default_api_level,
	)
	java_binary(
	name = "apksigner",
	main_class = "com.android.apksigner.ApkSignerTool",
	runtime_deps = ["build-tools/%s/lib/apksigner.jar" % build_tools_directory],
	)

	native.filegroup(
	name = "build_tools_libs",
	srcs = native.glob([
	"build-tools/%s/lib/**" % build_tools_directory,
	# Build tools version 24.0.0 added a lib64 folder.
	"build-tools/%s/lib64/**" % build_tools_directory,
	]),
	)

	for tool in ["aapt", "aapt2", "aidl", "zipalign"]:
	native.genrule(
	name = tool + "_runner",
	outs = [tool + "_runner.sh"],
	srcs = [],
	cmd = "\n".join([
	"cat > $@ << 'EOF'",
	"#!/bin/bash",
	"set -eu",
	# The tools under build-tools/VERSION require the libraries under
	# build-tools/VERSION/lib, so we can't simply depend on them as a
	# file like we do with aapt.
	# On Windows however we can use these binaries directly because
	# there's no runfiles support so Bazel just creates a junction to
	# {SDK}/build-tools.
	"SDK=$${0}.runfiles/%s" % name,
	# If $${SDK} is not a directory, it means that this tool is running
	# from a runfiles directory, in the case of
	# android_instrumentation_test. Hence, use the androidsdk
	# that's already present in the runfiles of the current context.
	"if [[ ! -d $${SDK} ]] ; then",
	" SDK=$$(pwd)/../%s" % name,
	"fi",
	"exec $${SDK}/build-tools/%s/%s $$*" % (build_tools_directory, tool),
	"EOF\n",
	]),
	)

	native.sh_binary(
	name = tool + "_binary",
	srcs = [tool + "_runner.sh"],
	data = [
	":build_tools_libs",
	"build-tools/%s/%s" % (build_tools_directory, tool),
	],
	)

	native.sh_binary(
	name = "fail",
	srcs = select({
	":windows": [":generate_fail_cmd"],
	"//conditions:default": [":generate_fail_sh"],
	}),
	)

	native.genrule(
	name = "generate_fail_sh",
	executable = 1,
	outs = ["fail.sh"],
	cmd = "echo -e '#!/bin/bash\\nexit 1' >> $@; chmod +x $@",
	)

	native.genrule(
	name = "generate_fail_cmd",
	executable = 1,
	outs = ["fail.cmd"],
	cmd = "echo @exit /b 1 > $@",
	)

	native.genrule(
	name = "main_dex_list_creator_source",
	srcs = [],
	outs = ["main_dex_list_creator.sh"],
	cmd = "\n".join([
	"cat > $@ <<'EOF'",
	"#!/bin/bash",
	"",
	"MAIN_DEX_LIST=$$1",
	"STRIPPED_JAR=$$2",
	"JAR=$$3",
	"" +
	"JAVA_BINARY=$$0.runfiles/%s/main_dex_list_creator_java" % name,
	"$$JAVA_BINARY $$STRIPPED_JAR $$JAR > $$MAIN_DEX_LIST",
	"exit $$?",
	"",
	"EOF\n",
	]),
	)

	native.sh_binary(
	name = "main_dex_list_creator",
	srcs = ["main_dex_list_creator.sh"],
	data = [":main_dex_list_creator_java"],
	)
	java_binary(
	name = "main_dex_list_creator_java",
	main_class = "com.android.multidex.ClassReferenceListBuilder",
	runtime_deps = [":dx_jar_import"],
	)
	java_binary(
	name = "dx_binary",
	main_class = "com.android.dx.command.Main",
	runtime_deps = [":dx_jar_import"],
	)
	java_import(
	name = "dx_jar_import",
	jars = ["build-tools/%s/lib/dx.jar" % build_tools_directory],
	)
	java_binary(
	name = "d8_compat_dx",
	main_class = "com.android.tools.r8.compatdx.CompatDx",
	runtime_deps = [":d8_jar_import"],
	)
	java_import(
	name = "d8_jar_import",
	jars = ["build-tools/%s/lib/d8.jar" % build_tools_directory],
	)

	TAGDIR_TO_TAG_MAP = {
	"google_apis_playstore": "playstore",
	"google_apis": "google",
	"default": "android",
	"android-tv": "tv",
	"android-wear": "wear",
	}

	ARCHDIR_TO_ARCH_MAP = {
	"x86": "x86",
	"armeabi-v7a": "arm",
	}

	def create_system_images_filegroups(system_image_dirs):
	"""Generate filegroups for the system images in the Android SDK.

	Args:
	system_image_dirs: list of strings, the directories containing system image
	files to be used to create android_device rules.
	"""

	# These images will need to be updated as Android releases new system images.
	# We are intentionally not adding future releases because there is no
	# guarantee that they will work out of the box. Supported system images should
	# be added here once they have been confirmed to work with the Bazel Android
	# testing infrastructure.
	system_images = [
	(tag, str(api), arch)
	for tag in ["android", "google"]
	for api in [10] + list(range(15, 20)) + list(range(21, 30))
	for arch in ("x86", "arm")
	] + [
	("playstore", str(api), "x86")
	for api in list(range(24, 30))
	]
	tv_images = [
	("tv", str(api), "x86")
	for api in range(21, 30)
	] + [
	("tv", "21", "arm"),
	("tv", "23", "arm"),
	]
	wear_images = [
	("wear", str(api), "x86")
	for api in [23, 25, 26, 28]
	] + [
	("wear", str(api), "arm")
	for api in [23, 25]
	]
	supported_system_images = system_images + tv_images + wear_images

	installed_system_images_dirs = {}
	for system_image_dir in system_image_dirs:
	apidir, tagdir, archdir = system_image_dir.split("/")[1:]
	if "-" not in apidir:
	continue
	api = apidir.split("-")[1] # "android-24" --> "24", "android-O" --> "O"
	if tagdir not in TAGDIR_TO_TAG_MAP:
	continue
	tag = TAGDIR_TO_TAG_MAP[tagdir]
	if archdir not in ARCHDIR_TO_ARCH_MAP:
	continue
	arch = ARCHDIR_TO_ARCH_MAP[archdir]
	if (tag, api, arch) in supported_system_images:
	name = "emulator_images_%s_%s_%s" % (tag, api, arch)
	installed_system_images_dirs[name] = system_image_dir
	else:
	# TODO(bazel-team): If the user has an unsupported system image installed,
	# should we print a warning? This includes all 64-bit system-images.
	pass

	for (tag, api, arch) in supported_system_images:
	name = "emulator_images_%s_%s_%s" % (tag, api, arch)
	if name in installed_system_images_dirs:
	system_image_dir = installed_system_images_dirs[name]

	# For supported system images that exist in /sdk/system-images/, we
	# create a filegroup with their contents.
	native.filegroup(
	name = name,
	srcs = native.glob([
	"%s/**" % system_image_dir,
	]),
	)
	native.filegroup(
	name = "%s_qemu2_extra" % name,
	srcs = native.glob(["%s/kernel-ranchu" % system_image_dir]),
	)
	else:
	# For supported system images that are not installed in the SDK, we
	# create a "poison pill" genrule to display a helpful error message to
	# a user who attempts to run a test against an android_device that
	# they don't have the system image for installed.
	native.genrule(
	name = name,
	outs = [
	# Necessary so that the build doesn't fail in analysis because
	# android_device expects a file named source.properties.
	"poison_pill_for_%s/source.properties" % name,
	],
	cmd = """echo \
	This rule requires that the Android SDK used by Bazel has the \
	following system image installed: %s. Please install this system \
	image through the Android SDK Manager and try again. ; \
	exit 1
	""" % name,
	)
	native.filegroup(
	name = "%s_qemu2_extra" % name,
	srcs = [],
	)