2380bfd459
See https://peps.python.org/pep-0758/ for more details. We implement this by extending the syntax for exceptions and exception groups so that the `type` field can now contain either an expression (which matches the old behaviour), or a comma-separated list of at least two elements (representing the new behaviour). We model the latter case using a new node type `exception_list`, which in `tsg-python` is simply mapped to a tuple. This means it matches the existing behaviour (when the tuple is surrounded by parentheses) exactly, hence we don't need to change any other code. As a consequence of this, however, we cannot directly parse the Python 2.7 syntax `except Foo, e: ...` as `except Foo as e: ...`, as this would introduce an ambiguity in the grammar. Thus, we have removed support for the (deprecated) 2.7-style syntax, and only allow `as` to indicate binding of the exception. The syntax `except Foo, e: ...` continues to be parsed (in particular, it's not suddenly a syntax error), but it will be parsed as if it were `except (Foo, e): ...`, which may not give the correct results. In principle we could extend the QL libraries to account for this case (specifically when analysing Python 2 code). In practice, however, I expect this to have a minor impact on results, and not worth the additional investment at this time.
CodeQL
This open source repository contains the standard CodeQL libraries and queries that power GitHub Advanced Security and the other application security products that GitHub makes available to its customers worldwide.
How do I learn CodeQL and run queries?
There is extensive documentation about the CodeQL language, writing CodeQL using the CodeQL extension for Visual Studio Code and using the CodeQL CLI.
Contributing
We welcome contributions to our standard library and standard checks. Do you have an idea for a new check, or how to improve an existing query? Then please go ahead and open a pull request! Before you do, though, please take the time to read our contributing guidelines. You can also consult our style guides to learn how to format your code for consistency and clarity, how to write query metadata, and how to write query help documentation for your query.
For information on contributing to CodeQL documentation, see the "contributing guide" for docs.
License
The code in this repository is licensed under the MIT License by GitHub.
The CodeQL CLI (including the CodeQL engine) is hosted in a different repository and is licensed separately. If you'd like to use the CodeQL CLI to analyze closed-source code, you will need a separate commercial license; please contact us for further help.
Visual Studio Code integration
If you use Visual Studio Code to work in this repository, there are a few integration features to make development easier.
CodeQL for Visual Studio Code
You can install the CodeQL for Visual Studio Code extension to get syntax highlighting, IntelliSense, and code navigation for the QL language, as well as unit test support for testing CodeQL libraries and queries.
Tasks
The .vscode/tasks.json file defines custom tasks specific to working in this repository. To invoke one of these tasks, select the Terminal | Run Task... menu option, and then select the desired task from the dropdown. You can also invoke the Tasks: Run Task command from the command palette.