Remove --microcoverage support

This feature is unused and depends on emma, which is obsolete.

PiperOrigin-RevId: 153713051

src/main/java/com/google/devtools/build/lib/analysis/config/BuildConfiguration.java

@@ -699,19 +699,6 @@ public static class Options extends FragmentOptions implements Cloneable {
     )
     public boolean collectCodeCoverage;
 
-    @Option(
-      name = "microcoverage",
-      defaultValue = "false",
-      category = "testing",
-      help =
-          "If specified with coverage, Blaze will collect microcoverage (per test method "
-              + "coverage) information during tests. Only targets that match "
-              + "--instrumentation_filter will be affected. Usually this option should not be "
-              + "specified directly - 'blaze coverage --microcoverage' command should be used "
-              + "instead."
-    )
-    public boolean collectMicroCoverage;
-
     @Option(
       name = "coverage_support",
       converter = LabelConverter.class,
@@ -2413,10 +2400,6 @@ public boolean isCodeCoverageEnabled() {
     return options.collectCodeCoverage;
   }
 
-  public boolean isMicroCoverageEnabled() {
-    return options.collectMicroCoverage;
-  }
-
   public boolean isLLVMCoverageMapFormatEnabled() {
     return options.useLLVMCoverageMapFormat;
   }

src/main/java/com/google/devtools/build/lib/rules/test/TestActionBuilder.java

@@ -282,16 +282,10 @@ private TestParams createTestAction(int shards) {
           coverageArtifacts.add(coverageArtifact);
         }
 
-        Artifact microCoverageArtifact = null;
-        if (collectCodeCoverage && config.isMicroCoverageEnabled()) {
-          microCoverageArtifact = ruleContext.getPackageRelativeArtifact(
-              targetName.getRelative(shardRunDir + "coverage.micro.dat"), root);
-        }
-
         env.registerAction(new TestRunnerAction(
             ruleContext.getActionOwner(), inputs, testRuntime,
             testLog, cacheStatus,
-            coverageArtifact, microCoverageArtifact,
+            coverageArtifact,
             testProperties, testEnv, executionSettings,
             shard, run, config, ruleContext.getWorkspaceName(),
             useTestRunner));

src/main/java/com/google/devtools/build/lib/rules/test/TestRunnerAction.java

@@ -86,7 +86,6 @@ public class TestRunnerAction extends AbstractAction implements NotifyOnActionCa
   private final PathFragment testInfrastructureFailure;
   private final PathFragment baseDir;
   private final Artifact coverageData;
-  private final Artifact microCoverageData;
   private final TestTargetProperties testProperties;
   private final TestTargetExecutionSettings executionSettings;
   private final int shardNum;
@@ -123,7 +122,6 @@ private static ImmutableList<Artifact> list(Artifact... artifacts) {
       Artifact testLog,
       Artifact cacheStatus,
       Artifact coverageArtifact,
-      Artifact microCoverageArtifact,
       TestTargetProperties testProperties,
       Map<String, String> extraTestEnv,
       TestTargetExecutionSettings executionSettings,
@@ -135,13 +133,12 @@ private static ImmutableList<Artifact> list(Artifact... artifacts) {
     super(owner, inputs,
         // Note that this action only cares about the runfiles, not the mapping.
         new RunfilesSupplierImpl(PathFragment.create("runfiles"), executionSettings.getRunfiles()),
-        list(testLog, cacheStatus, coverageArtifact, microCoverageArtifact));
+        list(testLog, cacheStatus, coverageArtifact));
     this.runtime = runtime;
     this.configuration = Preconditions.checkNotNull(configuration);
     this.testLog = testLog;
     this.cacheStatus = cacheStatus;
     this.coverageData = coverageArtifact;
-    this.microCoverageData = microCoverageArtifact;
     this.shardNum = shardNum;
     this.runNumber = runNumber;
     this.testProperties = Preconditions.checkNotNull(testProperties);
@@ -207,9 +204,6 @@ public List<ActionInput> getSpawnOutputs() {
     outputs.add(ActionInputHelper.fromPath(getUndeclaredOutputsAnnotationsPath()));
     if (isCoverageMode()) {
       outputs.add(getCoverageData());
-      if (isMicroCoverageMode()) {
-        outputs.add(getMicroCoverageData());
-      }
     }
     return outputs;
   }
@@ -358,8 +352,6 @@ protected void deleteOutputs(Path execRoot) throws IOException {
 
     // We cannot use coverageData artifact since it may be null. Generate coverage name instead.
     execRoot.getRelative(baseDir.getChild(coveragePrefix + ".dat")).delete();
-    // We cannot use microcoverageData artifact since it may be null. Generate filename instead.
-    execRoot.getRelative(baseDir.getChild(coveragePrefix + ".micro.dat")).delete();
 
     // Delete files fetched from remote execution.
     execRoot.getRelative(baseDir.getChild("test.zip")).delete();
@@ -441,12 +433,6 @@ public void setupEnvVariables(Map<String, String> env, int timeoutInSeconds) {
       env.put("COVERAGE_MANIFEST", getCoverageManifest().getExecPathString());
       env.put("COVERAGE_DIR", getCoverageDirectory().getPathString());
       env.put("COVERAGE_OUTPUT_FILE", getCoverageData().getExecPathString());
-      if (isMicroCoverageMode()) {
-        env.put("MICROCOVERAGE_REQUESTED", "true");
-        env.put("MICROCOVERAGE_OUTPUT_FILE", getMicroCoverageData().getExecPathString());
-      } else {
-        env.put("MICROCOVERAGE_REQUESTED", "false");
-      }
     }
   }
 
@@ -575,18 +561,6 @@ public boolean isCoverageMode() {
     return coverageData != null;
   }
 
-  /**
-   * @return microcoverage data artifact or null if code coverage was not requested.
-   */
-  @Nullable public Artifact getMicroCoverageData() {
-    return microCoverageData;
-  }
-
-  /** Returns true if micro-coverage data should be gathered. */
-  public boolean isMicroCoverageMode() {
-    return microCoverageData != null;
-  }
-
   /**
    * Returns a directory to temporarily store coverage results for the given action relative to the
    * execution root. This directory is used to store all coverage results related to the test