Add JGit binary check for plain text acceptance

Author: shanman190

rewrite-core/src/main/java/org/openrewrite/text/PlainTextParser.java

@@ -20,11 +20,15 @@
 import org.openrewrite.Parser;
 import org.openrewrite.SourceFile;
 import org.openrewrite.internal.EncodingDetectingInputStream;
+import org.openrewrite.jgit.diff.RawText;
 import org.openrewrite.tree.ParseError;
 import org.openrewrite.tree.ParsingEventListener;
 import org.openrewrite.tree.ParsingExecutionContextView;
 
 import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.PathMatcher;
 import java.nio.file.Paths;
@@ -89,7 +93,11 @@ public Stream<SourceFile> parseInputs(Iterable<Input> sources, @Nullable Path re
 
     @Override
     public boolean accept(Path path) {
-        return true;
+        try (InputStream is = Files.newInputStream(path)) {
+            return !RawText.isBinary(is);
+        } catch (IOException ignored) {
+            return false;
+        }
     }
 
     @Override
@@ -133,10 +141,11 @@ public boolean accept(Path path) {
                         }
                         // PathMather will not evaluate the path "README.md" to be matched by the pattern "**/README.md"
                         // This is counter-intuitive for most users and would otherwise require separate exclusions for files at the root and files in subdirectories
-                        if(!path.isAbsolute() && !path.startsWith(File.separator)) {
+                        if (!path.isAbsolute() && !path.startsWith(File.separator)) {
                             return accept(Paths.get("/" + path));
                         }
-                        return false;
+
+                        return super.accept(path);
                     }
                 };
             }