add codecov for sql plugin

.codecov.yml

@@ -0,0 +1,11 @@
+codecov:
+  require_ci_to_pass: yes
+
+coverage:
+  precision: 2
+  round: down
+  status:
+    project:
+      default:
+        target: 99%    # the required coverage value
+        threshold: 1%  # the leniency in hitting the target

.github/workflows/sql-test-and-build-workflow.yml

@@ -23,6 +23,12 @@ jobs:
         mkdir -p opendistro-sql-builds
         cp -r ./plugin/build/distributions/*.zip opendistro-sql-builds/
 
+    # This step uses the codecov-action Github action: https://github.com/codecov/codecov-action
+    - name: Upload SQL Coverage Report
+      uses: codecov/codecov-action@v1
+      with:
+        token: ${{ secrets.CODECOV_TOKEN }}
+
     - name: Upload Artifacts
       uses: actions/upload-artifact@v1
       with:

README.md

@@ -1,4 +1,6 @@
+
 [![Test and Build Workflow](https://github.com/opendistro-for-elasticsearch/sql/workflows/Java%20CI/badge.svg)](https://github.com/opendistro-for-elasticsearch/sql/actions)
+[![codecov](https://codecov.io/gh/opendistro-for-elasticsearch/sql/branch/develop/graph/badge.svg)](https://codecov.io/gh/opendistro-for-elasticsearch/sql)
 [![Documentation](https://img.shields.io/badge/api-reference-blue.svg)](https://opendistro.github.io/for-elasticsearch-docs/docs/sql/endpoints/)
 [![Chat](https://img.shields.io/badge/chat-on%20forums-blue)](https://discuss.opendistrocommunity.dev/c/sql/)
 ![PRs welcome!](https://img.shields.io/badge/PRs-welcome!-success)

core/build.gradle

@@ -43,6 +43,7 @@ jacoco {
 jacocoTestReport {
     reports {
         html.enabled true
+        xml.enabled true
     }
     afterEvaluate {
         classDirectories.setFrom(files(classDirectories.files.collect {

elasticsearch/build.gradle

@@ -37,6 +37,7 @@ jacoco {
 jacocoTestReport {
     reports {
         html.enabled true
+        xml.enabled true
     }
     afterEvaluate {
         classDirectories.setFrom(files(classDirectories.files.collect {

ppl/build.gradle

@@ -49,6 +49,7 @@ jacoco {
 jacocoTestReport {
     reports {
         html.enabled true
+        xml.enabled true
     }
     afterEvaluate {
         classDirectories.setFrom(files(classDirectories.files.collect {

protocol/build.gradle

@@ -35,6 +35,7 @@ jacoco {
 jacocoTestReport {
     reports {
         html.enabled true
+        xml.enabled true
     }
     afterEvaluate {
         classDirectories.setFrom(files(classDirectories.files.collect {

sql/build.gradle

@@ -54,6 +54,7 @@ jacoco {
 jacocoTestReport {
     reports {
         html.enabled true
+        xml.enabled true
     }
     afterEvaluate {
         classDirectories.setFrom(files(classDirectories.files.collect {