Add --output_filter option

Fixes #309.

--
MOS_MIGRATED_REVID=98639996

2 files changed, 23 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/buildtool/BuildRequest.java b/src/main/java/com/google/devtools/build/lib/buildtool/BuildRequest.java
index afe7597b30..f9277a9b3e 100644
--- a/src/main/java/com/google/devtools/build/lib/buildtool/BuildRequest.java
+++ b/src/main/java/com/google/devtools/build/lib/buildtool/BuildRequest.java
@@ -47,6 +47,7 @@ import java.util.List;
 import java.util.Set;
 import java.util.UUID;
 import java.util.concurrent.ExecutionException;
+import java.util.regex.Pattern;
 
 /**
  * A BuildRequest represents a single invocation of the build tool by a user.
@@ -120,6 +121,14 @@ public class BuildRequest implements OptionsClassProvider {
             + "Has no effect if --explain is not enabled.")
     public boolean verboseExplanations;
 
+    @Option(name = "output_filter",
+        converter = Converters.RegexPatternConverter.class,
+        defaultValue = "null",
+        category = "flags",
+        help = "Only shows warnings for rules with a name matching the provided regular "
+            + "expression.")
+    public Pattern outputFilter;
+
     @Deprecated
     @Option(name = "dump_makefile",
             defaultValue = "false",
diff --git a/src/main/java/com/google/devtools/build/lib/buildtool/BuildTool.java b/src/main/java/com/google/devtools/build/lib/buildtool/BuildTool.java
index d728c63db5..0fe2562fe0 100644
--- a/src/main/java/com/google/devtools/build/lib/buildtool/BuildTool.java
+++ b/src/main/java/com/google/devtools/build/lib/buildtool/BuildTool.java
@@ -53,6 +53,7 @@ import com.google.devtools.build.lib.buildtool.buildevent.TestFilteringCompleteE
 import com.google.devtools.build.lib.cmdline.TargetParsingException;
 import com.google.devtools.build.lib.collect.nestedset.NestedSet;
 import com.google.devtools.build.lib.events.Event;
+import com.google.devtools.build.lib.events.OutputFilter;
 import com.google.devtools.build.lib.events.Reporter;
 import com.google.devtools.build.lib.packages.InputFile;
 import com.google.devtools.build.lib.packages.License;
@@ -83,6 +84,7 @@ import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.TimeUnit;
 import java.util.logging.Logger;
+import java.util.regex.Pattern;
 
 /**
  * Provides the bulk of the implementation of the 'blaze build' command.
@@ -397,6 +399,8 @@ public class BuildTool {
     Profiler.instance().markPhase(ProfilePhase.LOAD);
     runtime.throwPendingException();
 
+    initializeOutputFilter(request);
+
     final boolean keepGoing = request.getViewOptions().keepGoing;
 
     Callback callback = new Callback() {
@@ -422,6 +426,16 @@ public class BuildTool {
   }
 
   /**
+   * Initializes the output filter to the value given with {@code --output_filter}.
+   */
+  private void initializeOutputFilter(BuildRequest request) {
+    Pattern outputFilter = request.getBuildOptions().outputFilter;
+    if (outputFilter != null) {
+      getReporter().setOutputFilter(OutputFilter.RegexOutputFilter.forPattern(outputFilter));
+    }
+  }
+
+  /**
    * Performs the initial phases 0-2 of the build: Setup, Loading and Analysis.
    * <p>
    * Postcondition: On success, populates the BuildRequest's set of targets to