Use ObjectMapper's PrettyPrintWriter for JSON output.

Author: evermind-micw

src/main/java/pl/project13/maven/git/GitCommitIdMojo.java

@@ -17,15 +17,25 @@
 
 package pl.project13.maven.git;
 
-import com.fasterxml.jackson.core.type.TypeReference;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.google.common.annotations.VisibleForTesting;
-import com.google.common.base.Function;
-import com.google.common.base.Predicate;
-import com.google.common.base.Predicates;
-import com.google.common.collect.Lists;
-import com.google.common.io.Closeables;
-import com.google.common.io.Files;
+import java.io.Closeable;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.io.Writer;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Properties;
+import java.util.TimeZone;
 
 import org.apache.maven.execution.MavenSession;
 import org.apache.maven.plugin.AbstractMojo;
@@ -37,23 +47,20 @@
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Function;
+import com.google.common.base.Predicate;
+import com.google.common.base.Predicates;
+import com.google.common.collect.Lists;
+import com.google.common.io.Closeables;
+import com.google.common.io.Files;
+
 import pl.project13.maven.git.log.LoggerBridge;
 import pl.project13.maven.git.log.MavenLoggerBridge;
 import pl.project13.maven.git.util.PropertyManager;
 
-import java.io.*;
-import java.net.InetAddress;
-import java.net.UnknownHostException;
-import java.nio.charset.Charset;
-import java.nio.charset.StandardCharsets;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.Properties;
-import java.util.TimeZone;
-
 /**
  * Puts git build-time information into property files or maven's properties.
  *
@@ -634,7 +641,7 @@ void maybeGeneratePropertiesFile(@NotNull Properties localProperties, File base,
           if (isJsonFormat) {
             log.info("Writing json file to [{}] (for module {})...", gitPropsFile.getAbsolutePath(), project.getName());
             ObjectMapper mapper = new ObjectMapper();
-            mapper.writeValue(outputWriter, localProperties);
+            mapper.writerWithDefaultPrettyPrinter().writeValue(outputWriter, localProperties);
           } else {
             log.info("Writing properties file to [{}] (for module {})...", gitPropsFile.getAbsolutePath(), project.getName());
             localProperties.store(outputWriter, "Generated by Git-Commit-Id-Plugin");