Merge "Add a hostside Java lib to read proto paths" into main am: 1f56027906 (738ab744) · Commits · e / os / android_build

tools/aconfig/aconfig_device_paths/Android.bp

+13 −0

Original line number	Diff line number	Diff line
		@@ -56,3 +56,16 @@ java_library {
		"//apex_available:platform",
		],
		}

		genrule {
		name: "libaconfig_java_host_device_paths_src",
		srcs: ["src/HostDeviceProtosTemplate.java"],
		out: ["HostDeviceProtos.java"],
		tool_files: ["partition_aconfig_flags_paths.txt"],
		cmd: "sed -e '/TEMPLATE/{r$(location partition_aconfig_flags_paths.txt)' -e 'd}' $(in) > $(out)",
		}

		java_library_host {
		name: "aconfig_host_device_paths_java",
		srcs: [":libaconfig_java_host_device_paths_src"],
		}

tools/aconfig/aconfig_device_paths/src/HostDeviceProtosTemplate.java

0 → 100644

+82 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2024 The Android Open Source Project
		*
		* 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.
		*/
		package android.aconfig;

		import java.io.File;
		import java.util.ArrayList;
		import java.util.Arrays;
		import java.util.HashSet;
		import java.util.List;
		import java.util.Set;
		import java.util.stream.Collectors;

		/**
		* A host lib that can read all aconfig proto file paths on a given device.
		*/
		public class HostDeviceProtos {
		/**
		* An interface that executes ADB command and return the result.
		*/
		public static interface AdbCommandExecutor {
		/** Executes the ADB command. */
		String executeAdbCommand(String command);
		}

		static final String[] PATHS = {
		TEMPLATE
		};

		private static final String APEX_DIR = "/apex";
		private static final String RECURSIVELY_LIST_APEX_DIR_COMMAND = "shell find /apex \| grep aconfig_flags";
		private static final String APEX_ACONFIG_PATH_SUFFIX = "/etc/aconfig_flags.pb";


		/**
		* Returns the list of all on-device aconfig proto paths from host side.
		*/
		public static List<String> parsedFlagsProtoPaths(AdbCommandExecutor adbCommandExecutor) {
		ArrayList<String> paths = new ArrayList(Arrays.asList(PATHS));

		String adbCommandOutput = adbCommandExecutor.executeAdbCommand(
		RECURSIVELY_LIST_APEX_DIR_COMMAND);

		if (adbCommandOutput == null) {
		return paths;
		}

		Set<String> allFiles = new HashSet<>(Arrays.asList(adbCommandOutput.split("\n")));

		Set<String> subdirs = allFiles.stream().map(file -> {
		String[] filePaths = file.split("/");
		// The first element is "", the second element is "apex".
		return filePaths.length > 2 ? filePaths[2] : "";
		}).collect(Collectors.toSet());

		for (String prefix : subdirs) {
		// For each mainline modules, there are two directories, one <modulepackage>/,
		// and one <modulepackage>@<versioncode>/. Just read the former.
		if (prefix.contains("@")) {
		continue;
		}

		String protoPath = APEX_DIR + "/" + prefix + APEX_ACONFIG_PATH_SUFFIX;
		if (allFiles.contains(protoPath)) {
		paths.add(protoPath);
		}
		}
		return paths;
		}
		}