Add CC_EXCLUDE support to exclude filetypes from reorganized reports.…

… Defaults to exclude Null. Updated documentation

BaseTools/Plugin/HostBasedUnitTestRunner/HostBasedUnitTestRunner.py

@@ -12,7 +12,6 @@
 import xml.etree.ElementTree
 from edk2toolext.environment.plugintypes.uefi_build_plugin import IUefiBuildPlugin
 from edk2toolext import edk2_logging
-import edk2toollib.windows.locate_tools as locate_tools
 from edk2toolext.environment import shell_environment
 from edk2toollib.utility_functions import RunCmd
 from edk2toollib.utility_functions import GetHostInfo
@@ -293,13 +292,14 @@ def organize_coverage(self, thebuilder) -> int:
         package = thebuilder.env.GetValue("CI_PACKAGE_NAME", "")
         file_out = package + "_coverage.xml"
         cov_file = os.path.join(buildOutputBase, file_out)
+        exclude = thebuilder.env.GetValue("CC_EXCLUDE", "*NULL*,*Null*,*null*")
 
         params = f"--database {db_path} coverage {cov_file} -o {cov_file} --by-package -ws {workspace}"
 
         params += f" -p {package}" * int(package != "")
         params += " --full" * int(thebuilder.env.GetValue("CC_FULL", "FALSE") == "TRUE")
         params += " --flatten" * int(thebuilder.env.GetValue("CC_FLATTEN", "FALSE") == "TRUE")
-
+        params += f" --exclude {exclude}" * int(exclude != "")
         return RunCmd("stuart_report", params)
 
     def parse_workspace(self, thebuilder) -> str:

UnitTestFrameworkPkg/ReadMe.md

@@ -1516,8 +1516,10 @@ or FALSE e.g. `CC_REORGANIZE=TRUE`:
 1. `CC_FULL`: Generates zero'd out coverage data for untested source files in the package.
    Default: `FALSE`
 1. `CC_FLATTEN`: Groups all source files together, rather than by INF. Default: `FALSE`
+1. `CC_EXCLUDE`: Comma separated list of fnmatch expressions to exclude from results.
+   Default: \*NULL\*,\*Null\*,\*null\*
 
-** NOTE: `CC_FULL` and `CC_FLATTEN` values only matter if `CC_REORGANIZE=TRUE`, as they only
+** NOTE: `CC_FULL` and `CC_FLATTEN` and `CC_EXCLUDE` values only matter if `CC_REORGANIZE=TRUE`, as they only
 effect how the coverage report is reorganized.
 
 **TIP: `CC_FLATTEN=TRUE/FALSE` will produce different coverage percentage results as `TRUE` de-duplicates source files