Cleanup missing use of StandardCharsets (elastic#125424)

Random annoyance that I figured, I'd just fix globally:
We can do a bit of a cleaner job when doing byte <-> string conversion here and there.

Author: original-brownbear

build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/ConcatFilesTask.java

@@ -8,6 +8,8 @@
  */
 package org.elasticsearch.gradle.internal;
 
+import com.google.common.collect.Iterables;
+
 import org.gradle.api.DefaultTask;
 import org.gradle.api.file.FileCollection;
 import org.gradle.api.tasks.Input;
@@ -85,7 +87,7 @@ public void setAdditionalLines(List<String> additionalLines) {
     public void concatFiles() throws IOException {
         if (getHeaderLine() != null) {
             getTarget().getParentFile().mkdirs();
-            Files.write(getTarget().toPath(), (getHeaderLine() + '\n').getBytes(StandardCharsets.UTF_8));
+            Files.writeString(getTarget().toPath(), getHeaderLine() + '\n');
         }
 
         // To remove duplicate lines
@@ -95,11 +97,12 @@ public void concatFiles() throws IOException {
                 uniqueLines.addAll(Files.readAllLines(f.toPath(), StandardCharsets.UTF_8));
             }
         }
-        Files.write(getTarget().toPath(), uniqueLines, StandardCharsets.UTF_8, StandardOpenOption.APPEND);
-
-        for (String additionalLine : additionalLines) {
-            Files.write(getTarget().toPath(), (additionalLine + '\n').getBytes(StandardCharsets.UTF_8), StandardOpenOption.APPEND);
-        }
+        Files.write(
+            getTarget().toPath(),
+            Iterables.concat(uniqueLines, additionalLines),
+            StandardCharsets.UTF_8,
+            StandardOpenOption.APPEND
+        );
     }
 
 }

build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/DependenciesInfoTask.java

@@ -155,7 +155,7 @@ public void generateDependenciesInfo() throws IOException {
             output.append(dep.getGroup() + ":" + dep.getName() + "," + dep.getVersion() + "," + url + "," + licenseType + "\n");
         }
 
-        Files.write(outputFile.toPath(), output.toString().getBytes("UTF-8"), StandardOpenOption.CREATE);
+        Files.writeString(outputFile.toPath(), output.toString(), StandardOpenOption.CREATE);
     }
 
     @Input

build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/doc/RestTestsFromDocSnippetTask.java

@@ -24,6 +24,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.io.PrintWriter;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.util.ArrayList;
@@ -440,7 +441,7 @@ private PrintWriter setupCurrent(Snippet test) {
             // Now setup the writer
             try {
                 Files.createDirectories(dest.getParent());
-                current = new PrintWriter(dest.toFile(), "UTF-8");
+                current = new PrintWriter(dest.toFile(), StandardCharsets.UTF_8);
                 return current;
             } catch (IOException e) {
                 throw new RuntimeException(e);

build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/precommit/FilePermissionsTask.java

@@ -103,7 +103,7 @@ public void checkInvalidPermissions() throws IOException {
         }
 
         outputMarker.getParentFile().mkdirs();
-        Files.write(outputMarker.toPath(), "done".getBytes("UTF-8"));
+        Files.writeString(outputMarker.toPath(), "done");
     }
 
     @OutputFile

build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/precommit/ForbiddenPatternsTask.java

@@ -135,7 +135,7 @@ public void checkInvalidPatterns() throws IOException {
 
         File outputMarker = getOutputMarker();
         outputMarker.getParentFile().mkdirs();
-        Files.write(outputMarker.toPath(), "done".getBytes(StandardCharsets.UTF_8));
+        Files.writeString(outputMarker.toPath(), "done");
     }
 
     @OutputFile

build-tools-internal/src/main/java/org/elasticsearch/gradle/internal/precommit/ThirdPartyAuditTask.java

@@ -369,7 +369,7 @@ private String runForbiddenAPIsCli() throws IOException {
         }
         final String forbiddenApisOutput;
         try (ByteArrayOutputStream outputStream = errorOut) {
-            forbiddenApisOutput = outputStream.toString(StandardCharsets.UTF_8.name());
+            forbiddenApisOutput = outputStream.toString(StandardCharsets.UTF_8);
         }
         if (EXPECTED_EXIT_CODES.contains(result.getExitValue()) == false) {
             throw new IllegalStateException("Forbidden APIs cli failed: " + forbiddenApisOutput);
@@ -402,7 +402,7 @@ private Set<String> runJdkJarHellCheck() throws IOException {
         }
         final String jdkJarHellCheckList;
         try (ByteArrayOutputStream outputStream = standardOut) {
-            jdkJarHellCheckList = outputStream.toString(StandardCharsets.UTF_8.name());
+            jdkJarHellCheckList = outputStream.toString(StandardCharsets.UTF_8);
         }
         return new TreeSet<>(Arrays.asList(jdkJarHellCheckList.split("\\r?\\n")));
     }

build-tools-internal/src/test/java/org/elasticsearch/gradle/internal/ConcatFilesTaskTests.java

@@ -60,8 +60,8 @@ public void testConcatenationWithUnique() throws IOException {
         file2.getParentFile().mkdirs();
         file1.createNewFile();
         file2.createNewFile();
-        Files.write(file1.toPath(), ("Hello" + System.lineSeparator() + "Hello").getBytes(StandardCharsets.UTF_8));
-        Files.write(file2.toPath(), ("Hello" + System.lineSeparator() + "नमस्ते").getBytes(StandardCharsets.UTF_8));
+        Files.writeString(file1.toPath(), "Hello" + System.lineSeparator() + "Hello");
+        Files.writeString(file2.toPath(), "Hello" + System.lineSeparator() + "नमस्ते");
 
         concatFilesTask.setFiles(project.fileTree(file1.getParentFile().getParentFile()));
 

build-tools-internal/src/test/java/org/elasticsearch/gradle/internal/precommit/DependencyLicensesTaskTests.java

@@ -244,7 +244,7 @@ private void createFileIn(File parent, String name, String content) throws IOExc
         Path file = parent.toPath().resolve(name);
         file.toFile().createNewFile();
 
-        Files.write(file, content.getBytes(StandardCharsets.UTF_8));
+        Files.writeString(file, content);
     }
 
     private TaskProvider<DependencyLicensesTask> createDependencyLicensesTask(Project project) {

build-tools-internal/src/test/java/org/elasticsearch/gradle/internal/precommit/FilePermissionsTaskTests.java

@@ -18,7 +18,7 @@
 import org.junit.Test;
 
 import java.io.File;
-import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.util.List;
 import java.util.stream.Collectors;
@@ -61,7 +61,7 @@ public void testCheckPermissionsWhenNoFileExists() throws Exception {
         filePermissionsTask.checkInvalidPermissions();
 
         File outputMarker = new File(project.getBuildDir(), "markers/filePermissions");
-        List<String> result = Files.readAllLines(outputMarker.toPath(), Charset.forName("UTF-8"));
+        List<String> result = Files.readAllLines(outputMarker.toPath(), StandardCharsets.UTF_8);
         assertEquals("done", result.get(0));
     }
 
@@ -80,7 +80,7 @@ public void testCheckPermissionsWhenNoExecutableFileExists() throws Exception {
         filePermissionsTask.checkInvalidPermissions();
 
         File outputMarker = new File(project.getBuildDir(), "markers/filePermissions");
-        List<String> result = Files.readAllLines(outputMarker.toPath(), Charset.forName("UTF-8"));
+        List<String> result = Files.readAllLines(outputMarker.toPath(), StandardCharsets.UTF_8);
         assertEquals("done", result.get(0));
 
         file.delete();

build-tools/src/main/java/org/elasticsearch/gradle/LoggedExec.java

@@ -37,7 +37,6 @@
 import java.io.IOException;
 import java.io.OutputStream;
 import java.io.UncheckedIOException;
-import java.io.UnsupportedEncodingException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.util.List;
@@ -182,11 +181,7 @@ public void run() {
                 execSpec.setWorkingDir(getWorkingDir().get());
             }
             if (getStandardInput().isPresent()) {
-                try {
-                    execSpec.setStandardInput(new ByteArrayInputStream(getStandardInput().get().getBytes("UTF-8")));
-                } catch (UnsupportedEncodingException e) {
-                    throw new GradleException("Cannot set standard input", e);
-                }
+                execSpec.setStandardInput(new ByteArrayInputStream(getStandardInput().get().getBytes(StandardCharsets.UTF_8)));
             }
         });
         int exitValue = execResult.getExitValue();