diff --git a/bin/gencovg b/bin/gencovg
new file mode 100755
index 0000000000..7d606b0b5a
--- /dev/null
+++ b/bin/gencovg
@@ -0,0 +1,25 @@
+#!/bin/bash -e
+
+function emit_file_url() {
+  local report="$1"
+  local path="$2"
+  local fullpath=$(realpath ${ROOT})
+  echo "Coverage Report"
+  echo "  ${name}"
+  if [[ -f "${fullpath}/${path}" ]]; then
+    echo "  file://${fullpath}/${path}"
+  else
+    echo "  Missing ${path}"
+  fi
+  echo
+}
+
+ROOT=$(dirname $0)/..
+BASE=..
+cd $ROOT
+
+pubber/bin/build covg
+validator/bin/build covg
+
+emit_file_url pubber pubber/build/jacocoHtml/index.html
+emit_file_url validator validator/build/jacocoHtml/index.html 
diff --git a/pubber/bin/build b/pubber/bin/build
index 7eef9b55fc..8c81eae180 100755
--- a/pubber/bin/build
+++ b/pubber/bin/build
@@ -1,16 +1,23 @@
 #!/bin/bash -e
 
-if [[ $1 == check ]]; then
+while [[ $# -gt 0 ]]; do
+  if [[ "$1" == "check" ]]; then
     check=check
     shift
-fi
+  elif [[ "$1" == "covg" ]]; then
+    covg=jacocoTestReport
+    shift
+  else
+    break
+  fi
+done
 
 rundir=$(dirname $0)
 cd $rundir/..
 
 newest=$(ls -rt `find src/ ../gencode/java -type f` | tail -n 1)
 jarfile=build/libs/pubber-1.0-SNAPSHOT-all.jar
-if [[ -z $check && -f $jarfile && $jarfile -nt $newest ]]; then
+if [[ -z $check && -z $covg && -f $jarfile && $jarfile -nt $newest ]]; then
     echo $jarfile up to date, skipping build.
     exit 0
 fi
@@ -18,7 +25,7 @@ fi
 echo Building pubber in $PWD
 
 rm -rf build
-./gradlew shadow $check
+./gradlew shadow $check $covg
 
 ls -l $jarfile
 
diff --git a/pubber/build.gradle b/pubber/build.gradle
index 143464553a..b11a5b372a 100644
--- a/pubber/build.gradle
+++ b/pubber/build.gradle
@@ -14,6 +14,7 @@ plugins {
     id 'com.github.johnrengelman.shadow' version '7.1.2'
     id 'com.adarshr.test-logger' version '3.2.0'
     id 'java'
+    id 'jacoco'
     id 'checkstyle'
 }
 
@@ -36,6 +37,17 @@ sourceSets {
     }
 }
 
+jacocoTestReport {
+    dependsOn test
+    reports {
+        xml.required = true
+        csv.required = false
+        html.outputLocation = layout.BuildDirectory.dir('jacocoHtml')
+    }
+}
+
+// TODO(future): jacocoTestCoverageVerification
+
 checkstyle {
     ignoreFailures = false
     maxWarnings = 0
diff --git a/validator/bin/build b/validator/bin/build
index 9d2874d3ea..2b39aa394c 100755
--- a/validator/bin/build
+++ b/validator/bin/build
@@ -1,9 +1,16 @@
 #!/bin/bash -e
 
-if [[ $1 == check ]]; then
+while [[ $# -gt 0 ]]; do
+  if [[ "$1" == "check" ]]; then
     check=check
     shift
-fi
+  elif [[ "$1" == "covg" ]]; then
+    covg=jacocoTestReport
+    shift
+  else
+    break
+  fi
+done
 
 ROOT=$(dirname $0)/..
 BASE=..
@@ -12,7 +19,7 @@ cd $ROOT
 jarfile=build/libs/validator-1.0-SNAPSHOT-all.jar
 
 newest=$(ls -rt `find src/ $BASE/gencode/java -type f` | tail -n 1)
-if [[ -z $check && -f $jarfile && $jarfile -nt $newest ]]; then
+if [[ -z $check && -z $covg && -f $jarfile && $jarfile -nt $newest ]]; then
     echo $jarfile up-to-date, skipping build.
     exit 0
 fi
@@ -22,7 +29,7 @@ export JAVA_HOME=$JAVA_HOME_11_X64
 echo Building validator in $PWD
 
 rm -rf build
-./gradlew shadow $check $*
+./gradlew shadow $check $covg $*
 
 ls -l $jarfile
 
diff --git a/validator/build.gradle b/validator/build.gradle
index 36b4a64062..98cfe31dc1 100644
--- a/validator/build.gradle
+++ b/validator/build.gradle
@@ -14,6 +14,7 @@ plugins {
     id 'com.github.johnrengelman.shadow' version '7.1.2'
     id 'com.adarshr.test-logger' version '3.2.0'
     id 'java'
+    id 'jacoco'
     id 'checkstyle'
 }
 
@@ -36,6 +37,21 @@ sourceSets {
     }
 }
 
+test {
+  finalizedBy jacocoTestReport
+}
+
+jacocoTestReport {
+    dependsOn test
+    reports {
+        xml.required = true
+        csv.required = false
+        html.outputLocation = layout.BuildDirectory.dir('jacocoHtml')
+    }
+}
+
+// TODO(future): jacocoTestCoverageVerification
+
 checkstyle {
     ignoreFailures = false
     maxWarnings = 0