Rust: Add lines-of-code queries.

rust/ql/src/queries/summary/LinesOfCode.ql

@@ -0,0 +1,13 @@
+/**
+ * @name Total lines of Rust code in the database
+ * @description The total number of lines of Rust code across all files, including any libraries and auto-generated files that the extractor sees. This is a useful metric of the size of a database. For all files that were seen during the build, this query counts the lines of code, excluding whitespace or comments.
+ * @kind metric
+ * @id rust/summary/lines-of-code
+ * @tags summary
+ *       lines-of-code
+ *       telemetry
+ */
+
+import rust
+
+select sum(File f | | f.getNumberOfLinesOfCode())

rust/ql/src/queries/summary/LinesOfUserCode.ql

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+/**
+ * @name Total lines of user written Rust code in the database
+ * @description The total number of lines of Rust code from the source code directory. This query counts the lines of code, excluding whitespace or comments.
+ * @kind metric
+ * @id rust/summary/lines-of-user-code
+ * @tags summary
+ *       lines-of-code
+ *       debug
+ */
+
+import rust
+
+select sum(File f | exists(f.getRelativePath()) | f.getNumberOfLinesOfCode())

rust/ql/src/queries/summary/LinesOfUserCodeInFiles.ql

@@ -0,0 +1,15 @@
+/**
+ * @name Lines of user code in files
+ * @description Measures the number of lines of code in each file from the source directory, ignoring lines that contain only comments or whitespace.
+ * @kind metric
+ * @id rust/summary/lines-of-user-code-in-files
+ * @metricType file
+ */
+
+import rust
+
+from File f, int n
+where
+  exists(f.getRelativePath()) and
+  n = f.getNumberOfLinesOfCode()
+select f, n order by n desc