Added --sites-only argument to GATK engine

src/main/java/org/broadinstitute/hellbender/cmdline/StandardArgumentDefinitions.java

@@ -37,6 +37,7 @@ private StandardArgumentDefinitions(){}
     public static final String ANNOTATIONS_TO_EXCLUDE_LONG_NAME = "annotations-to-exclude";
     public static final String SAMPLE_NAME_LONG_NAME = "sample-name";
     public static final String PEDIGREE_FILE_LONG_NAME = "pedigree";
+    public static final String SITES_ONLY_LONG_NAME = "sites-only";
 
     public static final String INPUT_SHORT_NAME = "I";
     public static final String OUTPUT_SHORT_NAME = "O";

src/main/java/org/broadinstitute/hellbender/engine/GATKTool.java

@@ -113,6 +113,10 @@ public abstract class GATKTool extends CommandLineProgram {
             optional = true)
     public boolean disableBamIndexCaching = false;
 
+    @Argument(fullName = StandardArgumentDefinitions.SITES_ONLY_LONG_NAME,
+            doc = "If true, don't emit GT fields when writing vcf file output.", optional = true)
+    public boolean sitesOnlyMode = false;
+
     /**
      * Master sequence dictionary to be used instead of all other dictionaries (if provided).
      */
@@ -728,6 +732,10 @@ public VariantContextWriter createVCFWriter(final File outFile) {
             }
         }
 
+        if (sitesOnlyMode) {
+            options.add(Options.DO_NOT_WRITE_GENOTYPES);
+        }
+
         return GATKVariantContextUtils.createVCFWriter(
                 outFile,
                 sequenceDictionary,

src/main/java/org/broadinstitute/hellbender/tools/walkers/haplotypecaller/HaplotypeCaller.java

@@ -198,7 +198,7 @@ public void onTraversalStart() {
 
         // The HC engine will make the right kind (VCF or GVCF) of writer for us
         final SAMSequenceDictionary sequenceDictionary = getHeaderForReads().getSequenceDictionary();
-        vcfWriter = hcEngine.makeVCFWriter(outputVCF, sequenceDictionary, createOutputVariantIndex, createOutputVariantMD5);
+        vcfWriter = hcEngine.makeVCFWriter(outputVCF, sequenceDictionary, createOutputVariantIndex, sitesOnlyMode, createOutputVariantMD5);
         hcEngine.writeHeader(vcfWriter, sequenceDictionary, getDefaultToolVCFHeaderLines());
     }
 

src/main/java/org/broadinstitute/hellbender/tools/walkers/haplotypecaller/HaplotypeCallerEngine.java

@@ -322,17 +322,20 @@ public static List<ReadFilter> makeStandardHCReadFilters() {
      * @return a VCF or GVCF writer as appropriate, ready to use
      */
     public VariantContextWriter makeVCFWriter( final String outputVCF, final SAMSequenceDictionary readsDictionary,
-                                               final boolean createOutputVariantIndex, final boolean  createOutputVariantMD5 ) {
+                                               final boolean createOutputVariantIndex, final boolean sitesOnlyMode,
+                                               final boolean  createOutputVariantMD5 ) {
         Utils.nonNull(outputVCF);
         Utils.nonNull(readsDictionary);
 
+        List<Options> options = new ArrayList<>(2);
+        if (createOutputVariantIndex) {options.add(Options.INDEX_ON_THE_FLY);}
+        if (sitesOnlyMode) {options.add(Options.DO_NOT_WRITE_GENOTYPES);}
+
         VariantContextWriter writer = GATKVariantContextUtils.createVCFWriter(
                 new File(outputVCF),
                 readsDictionary,
                 createOutputVariantMD5,
-                createOutputVariantIndex ?
-                        new Options[]{Options.INDEX_ON_THE_FLY} :
-                        new Options[0]
+                options.toArray(new Options[options.size()])
         );
 
         if ( hcArgs.emitReferenceConfidence == ReferenceConfidenceMode.GVCF ) {

src/test/java/org/broadinstitute/hellbender/engine/FeatureSupportIntegrationTest.java

@@ -1,14 +1,23 @@
 package org.broadinstitute.hellbender.engine;
 
+import htsjdk.variant.variantcontext.VariantContext;
+import htsjdk.variant.vcf.VCFHeader;
+import org.apache.commons.lang3.tuple.Pair;
 import org.broadinstitute.hellbender.CommandLineProgramTest;
+import org.broadinstitute.hellbender.Main;
+import org.broadinstitute.hellbender.cmdline.StandardArgumentDefinitions;
 import org.broadinstitute.hellbender.exceptions.UserException;
+import org.broadinstitute.hellbender.tools.walkers.variantutils.SelectVariants;
 import org.broadinstitute.hellbender.utils.test.IntegrationTestSpec;
 import org.broadinstitute.hellbender.tools.examples.ExampleReadWalkerWithVariants;
+import org.broadinstitute.hellbender.utils.test.VariantContextTestUtils;
+import org.testng.Assert;
 import org.testng.annotations.Test;
 
 import java.io.File;
 import java.io.IOException;
 import java.util.Arrays;
+import java.util.List;
 
 public final class FeatureSupportIntegrationTest extends CommandLineProgramTest {
     private static final String FEATURE_INTEGRATION_TEST_DIRECTORY = publicTestDir + "org/broadinstitute/hellbender/engine/";
@@ -83,6 +92,25 @@ public void testFeaturesAsIntervalsUnrecognizedFormatFile() throws IOException {
         testSpec.executeTest("testFeaturesAsIntervals", this);
     }
 
+    @Test
+    public void testSitesOnlyMode() {
+        File out = createTempFile("GTStrippedOutput", "vcf");
+        String[] args = new String[] {
+                "-V",  FEATURE_INTEGRATION_TEST_DIRECTORY + "vcf_with_genotypes.vcf",
+                "--" + StandardArgumentDefinitions.SITES_ONLY_LONG_NAME,
+                "-O",
+                out.getAbsolutePath()};
+        new Main().instanceMain(makeCommandLineArgs(Arrays.asList(args), SelectVariants.class.getSimpleName()));
+
+        // Assert that the genotype field has been stripped from the file
+        Pair<VCFHeader, List<VariantContext>> results = VariantContextTestUtils.readEntireVCFIntoMemory(out.getAbsolutePath());
+
+        Assert.assertFalse(results.getLeft().hasGenotypingData());
+        for (VariantContext v: results.getRight()) {
+            Assert.assertFalse(v.hasGenotypes());
+        }
+    }
+
     @Test
     // this test asserts that a helpful exception is thrown for blockZipped files lacking an index as they may not be fully supported
     //TODO this is a temporary fix until https://github.com/broadinstitute/gatk/issues/4224 has been resolved

src/test/resources/org/broadinstitute/hellbender/engine/vcf_with_genotypes.vcf

@@ -0,0 +1,23 @@
+##fileformat=VCFv4.1
+##ALT=<ID=NON_REF,Description="Represents any possible alternative allele at this location">
+##FORMAT=<ID=AD,Number=R,Type=Integer,Description="Allelic depths for the ref and alt alleles in the order listed">
+##FORMAT=<ID=DP,Number=1,Type=Integer,Description="Approximate read depth (reads with MQ=255 or with bad mates are filtered)">
+##FORMAT=<ID=GQ,Number=1,Type=Integer,Description="Genotype Quality">
+##FORMAT=<ID=GT,Number=1,Type=String,Description="Genotype">
+##FORMAT=<ID=MIN_DP,Number=1,Type=Integer,Description="Minimum DP observed within the GVCF block">
+##FORMAT=<ID=MIN_GQ,Number=1,Type=Integer,Description="Minimum GQ observed within the GVCF block">
+##FORMAT=<ID=PL,Number=G,Type=Integer,Description="Normalized, Phred-scaled likelihoods for genotypes as defined in the VCF specification">
+##FORMAT=<ID=SB,Number=4,Type=Integer,Description="Per-sample component statistics which comprise the Fisher's Exact Test to detect strand bias.">
+##GVCFBlock=minGQ=0(inclusive),maxGQ=5(exclusive)
+#CHROM	POS	ID	REF	ALT	QUAL	FILTER	INFO	FORMAT	NA1
+20	69491	.	A	<NON_REF>	.	.	.	GT:DP:GQ:MIN_DP:MIN_GQ:PL	0/0:94:99:82:99:0,120,1800
+20	69511	.	A	G,<NON_REF>	2253.77	.	.	GT:AD:DP:GQ:PL:SB	1/1:1,79,0:80:99:2284,207,0,2287,237,2316:0,1,46,33
+20	69512	.	C	<NON_REF>	.	.	.	GT:DP:GQ:MIN_DP:MIN_GQ:PL	0/0:96:99:82:99:0,120,1800
+20	69522	.	C	<NON_REF>	.	.	.	GT:DP:GQ:MIN_DP:MIN_GQ:PL	0/0:95:0:95:0:0,0,0
+20	69549	.	C	<NON_REF>	.	.	.	GT:DP:GQ:MIN_DP:MIN_GQ:PL	0/0:156:99:56:66:0,66,990
+20	69635	.	C	T,<NON_REF>	60.77	.	.	GT:AD:DP:GQ:PL:SB	0/1:4,3,0:7:89:89,0,119,101,128,229:0,4,0,3
+20	69762	.	A	<NON_REF>	.	.	.	GT:DP:GQ:MIN_DP:MIN_GQ:PL	0/0:7:18:7:18:0,18,270
+20	69763	.	C	<NON_REF>	.	.	.	GT:DP:GQ:MIN_DP:MIN_GQ:PL	0/0:7:21:7:21:0,21,253
+20	69767	.	C	<NON_REF>	.	.	.	GT:DP:GQ:MIN_DP:MIN_GQ:PL	0/0:7:12:7:12:0,12,180
+20	69772	.	TTATC	T,<NON_REF>	60.77	.	.	GT:AD:DP:GQ:PL:SB	0/1:4,3,0:7:89:89,0,119,101,128,229:0,4,0,3
+20	69773	.	T	<NON_REF>	.	.	.	GT:DP:GQ:MIN_DP:MIN_GQ:PL	0/0:7:0:3:0:0,0,0