Merge pull request github#6073 from geoffw0/loc

C++: Add lines of user code query

Author: criemen

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()
+  )

cpp/ql/test/query-tests/Summary/LinesOfCode.expected

@@ -1 +1 @@
-| 93 |
+| 96 |

cpp/ql/test/query-tests/Summary/LinesOfUserCode.expected

@@ -0,0 +1 @@
+| 93 |

cpp/ql/test/query-tests/Summary/LinesOfUserCode.qlref

@@ -0,0 +1 @@
+Summary/LinesOfUserCode.ql

cpp/ql/test/query-tests/Summary/generated-file.cpp

@@ -0,0 +1,12 @@
+/**
+ * This file is generated by abc.xyz.  Do not edit!
+ *
+ * (except that this isn't really a generated file, but the above is the typical sort of comment
+ *  you see at the beginning of a true generated file).
+ */
+
+int generated_function() {
+	// ...
+
+	return 1;
+}