damondouglas commented on code in PR #31796: URL: https://github.com/apache/beam/pull/31796#discussion_r1670712897
########## runners/prism/java/src/main/java/org/apache/beam/runners/prism/PrismLocator.java: ########## @@ -0,0 +1,253 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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 org.apache.beam.runners.prism; + +import static org.apache.beam.sdk.util.Preconditions.checkStateNotNull; +import static org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Preconditions.checkArgument; +import static org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Preconditions.checkState; + +import java.io.IOException; +import java.io.InputStream; +import java.io.OutputStream; +import java.net.URL; +import java.nio.charset.StandardCharsets; +import java.nio.file.Files; +import java.nio.file.Path; +import java.nio.file.Paths; +import java.nio.file.attribute.PosixFilePermission; +import java.nio.file.attribute.PosixFilePermissions; +import java.util.Iterator; +import java.util.Set; +import java.util.function.BiConsumer; +import java.util.zip.ZipEntry; +import java.util.zip.ZipInputStream; +import org.apache.beam.sdk.util.ReleaseInfo; +import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Splitter; +import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Strings; +import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.hash.HashCode; +import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.hash.Hashing; +import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.io.ByteStreams; + +/** + * Locates a Prism executable based on a user's default operating system and architecture + * environment or a {@link PrismPipelineOptions#getPrismLocation()} override. Handles the download, + * unzip, {@link PosixFilePermissions}, as needed. For {@link #GITHUB_DOWNLOAD_PREFIX} sources, + * additionally performs a SHA512 verification. + */ +class PrismLocator { + static final String OS_NAME_PROPERTY = "os.name"; + static final String ARCH_PROPERTY = "os.arch"; + static final String USER_HOME_PROPERTY = "user.home"; + + private static final String ZIP_EXT = "zip"; + private static final String SHA512_EXT = "sha512"; + private static final ReleaseInfo RELEASE_INFO = ReleaseInfo.getReleaseInfo(); + private static final String PRISM_BIN_PATH = ".apache_beam/cache/prism/bin"; + private static final Set<PosixFilePermission> PERMS = + PosixFilePermissions.fromString("rwxr-xr-x"); + private static final String GITHUB_DOWNLOAD_PREFIX = + "https://github.com/apache/beam/releases/download";; + private static final String GITHUB_TAG_PREFIX = "https://github.com/apache/beam/releases/tag";; + + private final PrismPipelineOptions options; + + PrismLocator(PrismPipelineOptions options) { + this.options = options; + } + + /** + * Downloads and prepares a Prism executable for use with the {@link PrismRunner}, executed by the + * {@link PrismExecutor}. The returned {@link String} is the absolute path to the Prism + * executable. + */ + String resolve() throws IOException { + + String from = + String.format("%s/v%s/%s.zip", GITHUB_DOWNLOAD_PREFIX, getSDKVersion(), buildFileName()); + + if (!Strings.isNullOrEmpty(options.getPrismLocation())) { + checkArgument( + !options.getPrismLocation().startsWith(GITHUB_TAG_PREFIX), + "Provided --prismLocation URL is not an Apache Beam Github " + + "Release page URL or download URL: ", + from); + + from = options.getPrismLocation(); + } + + String fromFileName = getNameWithoutExtension(from); + Path to = Paths.get(userHome(), PRISM_BIN_PATH, fromFileName); + + if (Files.exists(to)) { + return to.toString(); + } + + createDirectoryIfNeeded(to); + + if (from.startsWith("http")) { + String result = resolve(new URL(from), to); + checkState(Files.exists(to), "Resolved location does not exist: %s", result); + return result; + } + + String result = resolve(Paths.get(from), to); + checkState(Files.exists(to), "Resolved location does not exist: %s", result); + return result; + } + + private String resolve(URL from, Path to) throws IOException { + if (from.toString().startsWith(GITHUB_DOWNLOAD_PREFIX)) { + URL shaSumReference = new URL(from + "." + SHA512_EXT); + validateShaSum512(shaSumReference, from); Review Comment: Validates download happened correctly. -- This is an automated message from the Apache Git Service. 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