Merge pull request #6073 from geoffw0/loc

C++: Add lines of user code query

cpp/ql/src/Summary/LinesOfUserCode.ql

@@ -0,0 +1,17 @@
+/**
+ * @name Total lines of user written C/C++ code in the database
+ * @description The total number of lines of C/C++ code from the source code directory, excluding auto-generated files. This query counts the lines of code, excluding whitespace or comments. Note: If external libraries are included in the codebase either in a checked-in virtual environment or as vendored code, that will currently be counted as user written code.
+ * @kind metric
+ * @tags summary
+ *       lines-of-code
+ * @id cpp/summary/lines-of-user-code
+ */
+
+import cpp
+import semmle.code.cpp.AutogeneratedFile
+
+select sum(File f |
+    f.fromSource() and exists(f.getRelativePath()) and not f instanceof AutogeneratedFile
+  |
+    f.getMetrics().getNumberOfLinesOfCode()
+  )