Use Guava instead of Apache Commons for file ops in Ghostryde

This backs out most of [] fixes the external build (which wasn't
finding Apache Commons correctly), and makes miscellaneous tweaks and fixes,
including better handling representing the default case of decrypting to stdout.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=228877090

gradle/core/build.gradle

@@ -150,7 +150,6 @@ dependencies {
   maybeRuntime deps['com.sun.activation:javax.activation']
   maybeRuntime deps['com.thoughtworks.paranamer:paranamer']
   maybeRuntime deps['commons-codec:commons-codec']
-  compile deps['commons-io:commons-io']
   maybeRuntime deps['commons-logging:commons-logging']
   compile deps['dnsjava:dnsjava']
   maybeRuntime deps['io.netty:netty-buffer']

gradle/dependencies.gradle

@@ -74,7 +74,6 @@ ext {
       'com.jcraft:jsch:0.1.53',
       'com.jcraft:jzlib:1.1.3',
       'commons-codec:commons-codec:1.10',
-      'commons-io:commons-io:2.6',
       'commons-logging:commons-logging:1.2',
       'com.squareup:javapoet:1.8.0',
       'com.squareup:javawriter:2.5.1',

java/google/registry/repositories.bzl

@@ -106,7 +106,6 @@ def domain_registry_repositories(
         omit_com_sun_xml_bind_jaxb_xjc = False,
         omit_com_thoughtworks_paranamer = False,
         omit_commons_codec = False,
-        omit_commons_io = False,
         omit_commons_logging = False,
         omit_dnsjava = False,
         omit_io_netty_buffer = False,
@@ -338,8 +337,6 @@ def domain_registry_repositories(
         com_thoughtworks_paranamer()
     if not omit_commons_codec:
         commons_codec()
-    if not omit_commons_io:
-        commons_io()
     if not omit_commons_logging:
         commons_logging()
     if not omit_dnsjava:
@@ -1802,17 +1799,6 @@ def commons_codec():
         ],
     )
 
-def commons_io():
-    java_import_external(
-        name = "commons_io",
-        licenses = ["notice"],  # Apache License, Version 2.0
-        jar_sha256 = "a10418348d234968600ccb1d988efcbbd08716e1d96936ccc1880e7d22513474",
-        jar_urls = [
-            "http://maven.ibiblio.org/maven2/commons-io/commons-io/2.5/commons-io-2.5.jar",
-            "http://repo1.maven.org/maven2/commons-io/commons-io/2.5/commons-io-2.5.jar",
-        ],
-    )
-
 def commons_logging():
     java_import_external(
         name = "commons_logging",

java/google/registry/tools/BUILD

@@ -66,7 +66,6 @@ java_library(
         "//java/google/registry/whois",
         "//java/google/registry/xjc",
         "//java/google/registry/xml",
-        "//third_party/java/jakarta_commons_io",
         "//third_party/jaxb",
         "//third_party/objectify:objectify-v4_1",
         "@com_beust_jcommander",
@@ -93,7 +92,6 @@ java_library(
         "@com_google_oauth_client_jetty",
         "@com_google_re2j",
         "@com_googlecode_json_simple",
-        "@commons_io",
         "@io_bazel_rules_closure//closure/templates",
         "@jline",
         "@joda_time",

java/google/registry/tools/GhostrydeCommand.java

@@ -15,24 +15,23 @@
 package google.registry.tools;
 
 import static com.google.common.base.Preconditions.checkArgument;
-import static java.nio.file.StandardCopyOption.REPLACE_EXISTING;
+import static google.registry.util.PreconditionsUtils.checkArgumentNotNull;
 
 import com.beust.jcommander.Parameter;
 import com.beust.jcommander.Parameters;
 import com.google.common.io.ByteStreams;
+import com.google.common.io.Files;
 import google.registry.keyring.api.KeyModule.Key;
 import google.registry.rde.Ghostryde;
 import google.registry.tools.params.PathParameter;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import javax.annotation.Nullable;
 import javax.inject.Inject;
 import javax.inject.Provider;
-import org.apache.commons.io.IOUtils;
-import org.bouncycastle.openpgp.PGPException;
 import org.bouncycastle.openpgp.PGPPrivateKey;
 import org.bouncycastle.openpgp.PGPPublicKey;
 
@@ -62,9 +61,11 @@ final class GhostrydeCommand implements CommandWithRemoteApi {
           "Output file. If this is a directory: (a) in --encrypt mode, the output "
               + "filename will be the input filename with '.ghostryde' appended, and will have an "
               + "extra '<filename>.length' file with the original file's length; (b) In --decrypt "
-              + "mode, the output filename will be the input filename with '.decrypt' appended.",
+              + "mode, the output filename will be the input filename with '.decrypt' appended. "
+              + "Defaults to stdout in --decrypt mode.",
       validateWith = PathParameter.class)
-  private Path output = Paths.get("/dev/stdout");
+  @Nullable
+  private Path output;
 
   @Inject
   @Key("rdeStagingEncryptionKey")
@@ -78,38 +79,40 @@ final class GhostrydeCommand implements CommandWithRemoteApi {
   public final void run() throws Exception {
     checkArgument(encrypt ^ decrypt, "Please specify either --encrypt or --decrypt");
     if (encrypt) {
+      checkArgumentNotNull(output, "--output path is required in --encrypt mode");
       runEncrypt();
     } else {
       runDecrypt();
     }
   }
 
-  private void runEncrypt() throws IOException, PGPException {
-    Path outFile = Files.isDirectory(output)
-        ? output.resolve(input.getFileName() + ".ghostryde")
-        : output;
-    Path lenOutFile =
-        Files.isDirectory(output) ? output.resolve(input.getFileName() + ".length") : null;
-    try (OutputStream out = Files.newOutputStream(outFile);
-        OutputStream lenOut = lenOutFile == null ? null : Files.newOutputStream(lenOutFile);
+  private void runEncrypt() throws IOException {
+    boolean isOutputToDir = output.toFile().isDirectory();
+    Path outFile = isOutputToDir ? output.resolve(input.getFileName() + ".ghostryde") : output;
+    Path lenOutFile = isOutputToDir ? output.resolve(input.getFileName() + ".length") : null;
+    try (OutputStream out = Files.asByteSink(outFile.toFile()).openBufferedStream();
+        OutputStream lenOut =
+            (lenOutFile == null)
+                ? null
+                : Files.asByteSink(lenOutFile.toFile()).openBufferedStream();
         OutputStream ghostrydeEncoder =
             Ghostryde.encoder(out, rdeStagingEncryptionKey.get(), lenOut);
-        InputStream in = Files.newInputStream(input)) {
+        InputStream in = Files.asByteSource(input.toFile()).openBufferedStream()) {
       ByteStreams.copy(in, ghostrydeEncoder);
     }
   }
 
-  private void runDecrypt() throws IOException, PGPException {
-    try (InputStream in = Files.newInputStream(input);
+  private void runDecrypt() throws IOException {
+    try (InputStream in = Files.asByteSource(input.toFile()).openBufferedStream();
         InputStream ghostDecoder = Ghostryde.decoder(in, rdeStagingDecryptionKey.get())) {
-      System.err.println("output = " + output);
-      if (output.toString().equals("/dev/stdout")) {
-        System.err.println("doing copy");
-        IOUtils.copy(ghostDecoder, System.out);
+      if (output == null) {
+        ByteStreams.copy(ghostDecoder, System.out);
       } else {
         Path outFile =
-            Files.isDirectory(output) ? output.resolve(input.getFileName() + ".decrypt") : output;
-        Files.copy(ghostDecoder, outFile, REPLACE_EXISTING);
+            output.toFile().isDirectory()
+                ? output.resolve(input.getFileName() + ".decrypt")
+                : output;
+        Files.asByteSink(outFile.toFile()).writeFrom(ghostDecoder);
       }
     }
   }

javatests/google/registry/tools/GhostrydeCommandTest.java

@@ -15,6 +15,7 @@
 package google.registry.tools;
 
 import static com.google.common.truth.Truth.assertThat;
+import static google.registry.testing.JUnitBackports.assertThrows;
 import static java.nio.charset.StandardCharsets.UTF_8;
 
 import google.registry.keyring.api.Keyring;
@@ -26,7 +27,6 @@ import java.io.ByteArrayOutputStream;
 import java.io.PrintStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.nio.file.Paths;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;
@@ -76,10 +76,35 @@ public class GhostrydeCommandTest extends CommandTestCase<GhostrydeCommand> {
     System.setOut(orgStdout);
   }
 
+  @Test
+  public void testParameters_cantSpecifyBothEncryptAndDecrypt() {
+    IllegalArgumentException thrown =
+        assertThrows(IllegalArgumentException.class, () -> runCommand("--encrypt", "--decrypt"));
+    assertThat(thrown).hasMessageThat().isEqualTo("Please specify either --encrypt or --decrypt");
+  }
+
+  @Test
+  public void testParameters_mustSpecifyOneOfEncryptOrDecrypt() {
+    IllegalArgumentException thrown =
+        assertThrows(
+            IllegalArgumentException.class,
+            () -> runCommand("--input=" + tmpDir.newFile(), "--output=" + tmpDir.newFile()));
+    assertThat(thrown).hasMessageThat().isEqualTo("Please specify either --encrypt or --decrypt");
+  }
+
+  @Test
+  public void testEncrypt_outputPathIsRequired() {
+    IllegalArgumentException thrown =
+        assertThrows(
+            IllegalArgumentException.class,
+            () -> runCommand("--encrypt", "--input=" + tmpDir.newFile()));
+    assertThat(thrown).hasMessageThat().isEqualTo("--output path is required in --encrypt mode");
+  }
+
   @Test
   public void testEncrypt_outputIsAFile_writesToFile() throws Exception {
-    Path inFile = Paths.get(tmpDir.newFile("atrain.txt").toString());
-    Path outFile = Paths.get(tmpDir.newFile().toString());
+    Path inFile = tmpDir.newFile("atrain.txt").toPath();
+    Path outFile = tmpDir.newFile().toPath();
     Files.write(inFile, SONG_BY_CHRISTINA_ROSSETTI);
     runCommand("--encrypt", "--input=" + inFile, "--output=" + outFile);
     byte[] decoded =
@@ -89,8 +114,8 @@ public class GhostrydeCommandTest extends CommandTestCase<GhostrydeCommand> {
 
   @Test
   public void testEncrypt_outputIsADirectory_appendsGhostrydeExtension() throws Exception {
-    Path inFile = Paths.get(tmpDir.newFile("atrain.txt").toString());
-    Path outDir = Paths.get(tmpDir.newFolder().toString());
+    Path inFile = tmpDir.newFile("atrain.txt").toPath();
+    Path outDir = tmpDir.newFolder().toPath();
     Files.write(inFile, SONG_BY_CHRISTINA_ROSSETTI);
     runCommand("--encrypt", "--input=" + inFile, "--output=" + outDir);
     Path lenOutFile = outDir.resolve("atrain.txt.length");
@@ -104,8 +129,8 @@ public class GhostrydeCommandTest extends CommandTestCase<GhostrydeCommand> {
 
   @Test
   public void testDecrypt_outputIsAFile_writesToFile() throws Exception {
-    Path inFile = Paths.get(tmpDir.newFile().toString());
-    Path outFile = Paths.get(tmpDir.newFile().toString());
+    Path inFile = tmpDir.newFile().toPath();
+    Path outFile = tmpDir.newFile().toPath();
     Files.write(
         inFile, Ghostryde.encode(SONG_BY_CHRISTINA_ROSSETTI, keyring.getRdeStagingEncryptionKey()));
     runCommand("--decrypt", "--input=" + inFile, "--output=" + outFile);
@@ -114,8 +139,8 @@ public class GhostrydeCommandTest extends CommandTestCase<GhostrydeCommand> {
 
   @Test
   public void testDecrypt_outputIsADirectory_AppendsDecryptExtension() throws Exception {
-    Path inFile = Paths.get(tmpDir.newFolder().toString()).resolve("atrain.ghostryde");
-    Path outDir = Paths.get(tmpDir.newFolder().toString());
+    Path inFile = tmpDir.newFolder().toPath().resolve("atrain.ghostryde");
+    Path outDir = tmpDir.newFolder().toPath();
     Files.write(
         inFile, Ghostryde.encode(SONG_BY_CHRISTINA_ROSSETTI, keyring.getRdeStagingEncryptionKey()));
     runCommand("--decrypt", "--input=" + inFile, "--output=" + outDir);
@@ -125,7 +150,7 @@ public class GhostrydeCommandTest extends CommandTestCase<GhostrydeCommand> {
 
   @Test
   public void testDecrypt_outputIsStdOut() throws Exception {
-    Path inFile = Paths.get(tmpDir.newFolder().toString()).resolve("atrain.ghostryde");
+    Path inFile = tmpDir.newFolder().toPath().resolve("atrain.ghostryde");
     Files.write(
         inFile, Ghostryde.encode(SONG_BY_CHRISTINA_ROSSETTI, keyring.getRdeStagingEncryptionKey()));
     ByteArrayOutputStream out = new ByteArrayOutputStream();