Ruby: Add rb/diagnostics/extraction-warnings so that we don't miss anything we had before.

Author: geoffw0

ruby/ql/src/queries/diagnostics/ExtractionWarnings.ql

@@ -0,0 +1,19 @@
+/**
+ * @name Extraction warnings
+ * @description List all extraction warnings for files in the source code directory.
+ * @kind diagnostic
+ * @id rb/diagnostics/extraction-warnings
+ */
+
+import codeql.ruby.AST
+import codeql.ruby.Diagnostics
+
+/** Gets the SARIF severity to associate with a warning. */
+int getSeverity() { result = 1 }
+
+from ExtractionWarning warning, File f
+where
+  f = warning.getLocation().getFile() and
+  exists(f.getRelativePath())
+select warning, "Extraction warning in " + f + " with message " + warning.getMessage(),
+  getSeverity()

ruby/ql/test/query-tests/diagnostics/ExtractionWarnings.expected

@@ -0,0 +1 @@
+| src/not_ruby.rb:5:25:5:26 | A parse error occurred. Check the syntax of the file. If the file is invalid, correct the error or exclude the file from analysis. | Extraction warning in src/not_ruby.rb with message A parse error occurred. Check the syntax of the file. If the file is invalid, correct the error or exclude the file from analysis. | 1 |

ruby/ql/test/query-tests/diagnostics/ExtractionWarnings.qlref

@@ -0,0 +1 @@
+queries/diagnostics/ExtractionWarnings.ql