Register the BuildEventStreamer

...so that it gets informed about all relevant events happening
during the build. For the time being, we only consider one transport,
that to a text file.

--
Change-Id: I429c957f39a07b795a71acbeaa1360178574a1d1
Reviewed-on: https://bazel-review.googlesource.com/#/c/6276
MOS_MIGRATED_REVID=135464059

src/main/java/com/google/devtools/build/lib/BUILD

diff --git a/src/main/java/com/google/devtools/build/lib/BUILD b/src/main/java/com/google/devtools/build/lib/BUILD
index 5bfa87b..33d1601 100644
--- a/src/main/java/com/google/devtools/build/lib/BUILD
+++ b/src/main/java/com/google/devtools/build/lib/BUILD
@@ -1001,6 +1001,7 @@
         "//src/main/java/com/google/devtools/build/docgen:docgen_javalib",
         "//src/main/java/com/google/devtools/build/lib/actions",
         "//src/main/java/com/google/devtools/build/lib/buildeventstream/proto:build_event_stream_java_proto",
+        "//src/main/java/com/google/devtools/build/lib/buildeventstream/transports",
         "//src/main/java/com/google/devtools/build/lib/cmdline",
         "//src/main/java/com/google/devtools/build/lib/query2",
         "//src/main/java/com/google/devtools/build/lib/query2:query-engine",

src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandDispatcher.java

diff --git a/src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandDispatcher.java b/src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandDispatcher.java
index 2cb9829..7d7f300 100644
--- a/src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandDispatcher.java
+++ b/src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandDispatcher.java
@@ -27,6 +27,8 @@
 import com.google.common.collect.Iterables;
 import com.google.common.collect.ListMultimap;
 import com.google.common.io.Flushables;
+import com.google.devtools.build.lib.buildeventstream.BuildEventTransport;
+import com.google.devtools.build.lib.buildeventstream.transports.TextFormatFileTransport;
 import com.google.devtools.build.lib.events.Event;
 import com.google.devtools.build.lib.events.EventHandler;
 import com.google.devtools.build.lib.events.Reporter;
@@ -452,6 +454,18 @@
     Reporter reporter = env.getReporter();
     reporter.addHandler(handler);
     env.getEventBus().register(handler);
+    if (eventHandlerOptions.buildEventTextFile.length() > 0) {
+      try {
+        BuildEventStreamer streamer =
+            new BuildEventStreamer(
+                ImmutableSet.<BuildEventTransport>of(
+                    new TextFormatFileTransport(eventHandlerOptions.buildEventTextFile)));
+        reporter.addHandler(streamer);
+        env.getEventBus().register(streamer);
+      } catch (IOException e) {
+        return ExitCode.LOCAL_ENVIRONMENTAL_ERROR.getNumericExitCode();
+      }
+    }
 
     // We register an ANSI-allowing handler associated with {@code handler} so that ANSI control
     // codes can be re-introduced later even if blaze is invoked with --color=no. This is useful

src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandEventHandler.java

diff --git a/src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandEventHandler.java b/src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandEventHandler.java
index 60e8741..7ab613f 100644
--- a/src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandEventHandler.java
+++ b/src/main/java/com/google/devtools/build/lib/runtime/BlazeCommandEventHandler.java
@@ -21,10 +21,6 @@
 import com.google.devtools.common.options.EnumConverter;
 import com.google.devtools.common.options.Option;
 import com.google.devtools.common.options.OptionsBase;
-
-import org.joda.time.format.DateTimeFormat;
-import org.joda.time.format.DateTimeFormatter;
-
 import java.io.IOException;
 import java.io.OutputStream;
 import java.io.PrintStream;
@@ -32,6 +28,8 @@
 import java.util.Set;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+import org.joda.time.format.DateTimeFormat;
+import org.joda.time.format.DateTimeFormatter;
 
 /**
  * BlazeCommandEventHandler: an event handler established for the duration of a
@@ -170,6 +168,15 @@
     )
     public int experimentalUiActionsShown;
 
+
+    @Option(
+      name = "experimental_build_event_text_file",
+      defaultValue = "",
+      category = "hidden",
+      help = "If non-empty, write a textual representation of the build event protocol to that file"
+    )
+    public String buildEventTextFile;
+
     public boolean useColor() {
       return useColorEnum == UseColor.YES || (useColorEnum == UseColor.AUTO && isATty);
     }