Now have a coverage report.

Makefile

@@ -47,4 +47,4 @@ win_installer:
 	powershell 'start "C:\Program Files (x86)\solicus\InstallForge\bin\ifbuilderenvx86.exe" win_installer.ifp'
 
 coverage_report:
-	echo "test"
+	powershell 'scripts/coverage_report.ps1'

scripts/coverage_report.ps1

@@ -0,0 +1,10 @@
+rm -recurse -force coverage/*
+cp *.cpp,*.hpp,*.rl builddir
+
+. .venv/Scripts/activate
+
+rm -recurse -force coverage
+
+gcovr -o coverage/ --html --html-details --gcov-ignore-errors all -e builddir/subprojects -e subprojects .
+
+start .\coverage\coverage_details.html