Remove ability to ingore files from spec validation (elastic#56647)

An ignore parameter was originally added to the ValidateJsonAgainstSchemaTask
to allow the build to pass for REST specs that did not properly validate
against the schema.

Since the introduction of this task, all schemas that did not validate have
been fixed to now validate properly.

This commit removes the ability to ignore specific files for validation. This
allows any consumers the assurance that all REST specs validate against the schema.

buildSrc/src/main/java/org/elasticsearch/gradle/precommit/ValidateJsonAgainstSchemaTask.java

@@ -29,10 +29,8 @@
 import org.gradle.api.DefaultTask;
 import org.gradle.api.UncheckedIOException;
 import org.gradle.api.file.FileCollection;
-import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.InputFile;
 import org.gradle.api.tasks.InputFiles;
-import org.gradle.api.tasks.Optional;
 import org.gradle.api.tasks.OutputFile;
 import org.gradle.api.tasks.TaskAction;
 import org.gradle.work.ChangeType;
@@ -42,9 +40,9 @@
 import java.io.File;
 import java.io.IOException;
 import java.io.PrintWriter;
-import java.util.Arrays;
+import java.nio.file.Files;
+import java.nio.file.StandardOpenOption;
 import java.util.Collection;
-import java.util.HashSet;
 import java.util.LinkedHashMap;
 import java.util.LinkedHashSet;
 import java.util.Map;
@@ -57,7 +55,6 @@
 public class ValidateJsonAgainstSchemaTask extends DefaultTask {
 
     private final ObjectMapper mapper = new ObjectMapper();
-    private Set<String> ignore = new HashSet<>();
     private File jsonSchema;
     private FileCollection inputFiles;
 
@@ -80,16 +77,6 @@ public void setJsonSchema(File jsonSchema) {
         this.jsonSchema = jsonSchema;
     }
 
-    @Input
-    @Optional
-    public Set<String> getIgnore() {
-        return ignore;
-    }
-
-    public void ignore(String... ignore) {
-        this.ignore.addAll(Arrays.asList(ignore));
-    }
-
     @OutputFile
     public File getReport() {
         return new File(getProject().getBuildDir(), "reports/validateJson.txt");
@@ -108,9 +95,7 @@ public void validate(InputChanges inputChanges) throws IOException {
             .filter(f -> f.getChangeType() != ChangeType.REMOVED)
             .forEach(fileChange -> {
                 File file = fileChange.getFile();
-                if (ignore.contains(file.getName())) {
-                    getLogger().debug("Ignoring file [{}] due to configuration", file.getName());
-                } else if (file.isDirectory() == false) {
+                if (file.isDirectory() == false) {
                     // validate all files and hold on to errors for a complete report if there are failures
                     getLogger().debug("Validating JSON [{}]", file.getName());
                     try {
@@ -122,9 +107,7 @@ public void validate(InputChanges inputChanges) throws IOException {
                 }
             });
         if (errors.isEmpty()) {
-            try (PrintWriter printWriter = new PrintWriter(getReport())) {
-                printWriter.println("Success! No validation errors found.");
-            }
+            Files.writeString(getReport().toPath(), "Success! No validation errors found.", StandardOpenOption.CREATE);
         } else {
             try (PrintWriter printWriter = new PrintWriter(getReport())) {
                 printWriter.printf("Schema: %s%n", jsonSchemaOnDisk);