added xpath|grep|awk coverage parsing command

.gitlab-ci.yml

@@ -41,7 +41,11 @@ pages:
   stage: deploy
   script:
     - mvn clean cobertura:cobertura
-    - grep 'coverage line-rate' usgs-api/target/site/cobertura/coverage.xml
+    # now extract the actual value from the coverage report and print it to the console
+    # [1] (xpath) extract the line-rate attribute out of the xml file, uses xpath, so 'libxml-xpath-perl' has to be installed on the runner
+    # [2] (grep)  get rid of the attribute text so only the actual number remains
+    # [3] (awk)   multiply the value (0..1) to get the need percent value
+    - xpath -q -e '/coverage/@line-rate'  workspace/gms-aux/usgs-api/target/site/cobertura/coverage.xml | grep -o '[[:digit:]]\.[[:digit:]]\{1,\}' | awk '{print "Coverage: " $0*100}'
     - mv usgs-api/target/site/cobertura/ public/
   artifacts:
     paths: