Merge pull request github#5304 from asgerf/js/non-alert-data

JS: Implement new metric queries for line counting

Author: asgerf

javascript/ql/src/Summary/LinesOfCode.ql

@@ -0,0 +1,11 @@
+/**
+ * @id js/summary/lines-of-code
+ * @name Total lines of JavaScript and TypeScript code in the database
+ * @description The total number of lines of JavaScript or TypeScript code across all files checked into the repository, except in `node_modules`. This is a useful metric of the size of a database. For all files that were seen during extraction, this query counts the lines of code, excluding whitespace or comments.
+ * @kind metric
+ * @tags summary
+ */
+
+import javascript
+
+select sum(File f | not f.getATopLevel().isExterns() | f.getNumberOfLinesOfCode())

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

@@ -0,0 +1 @@
+| 12 |

javascript/ql/test/query-tests/Summary/LinesOfCode.qlref

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+Summary/LinesOfCode.ql

javascript/ql/test/query-tests/Summary/src/.eslintrc.yml

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+rules:
+  semi: error

javascript/ql/test/query-tests/Summary/src/externs.js

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+/**
+ * @externs
+ */
+
+// Should not be counted
+
+function Object() {}
+function String() {}

javascript/ql/test/query-tests/Summary/src/javascript_file.js

@@ -0,0 +1,7 @@
+function foo(x) {
+    return x;
+}
+
+function bar(y) {
+    return y;
+}

javascript/ql/test/query-tests/Summary/src/package.json

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+{
+    "private": true,
+    "devDependencies": {
+        "typescript": "*"
+    }
+}

javascript/ql/test/query-tests/Summary/src/typescript_file.ts

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+export interface Foo {
+    x: number;
+}
+
+export function getX(f: Foo) {
+    return f.x;
+}