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* codeql-lab: Centralized Git Repository for CodeQL Development
** Overview
codeql-lab is a consolidated Git repository that collects all relevant
CodeQL components, resources, and tooling into a single
version-controlled location.
** Purpose
The goal of this repository is to provide an integrated development
environment (“lab”) for CodeQL research, experimentation, and custom
query development. It simplifies setup by maintaining all required
submodules, configuration files, and datasets in one place.
** Repository Location
The primary repository is hosted at:
https://github.com/hohn/codeql-lab
** Intended Use Cases
- Local experimentation with CodeQL queries and libraries.
- End-to-end testing of custom model data and query logic.
This includes writing and validating custom data flow models,
adjusting model coverage, and confirming that query results behave
as expected across controlled datasets. The lab setup supports rapid
iteration on QL logic, helping detect unintended changes and enabling
reproducible evaluations of taint tracking, control flow, or API usage
patterns.
- Structured collaboration and controlled updates across all
CodeQL-related artifacts.
- Simplified onboarding and reproducible setup for new contributors or
analysis environments.
* Prerequisites
Working with this repository assumes prior experience with:
- *Git, Bash, and standard Unix command-line tools*. These are used
throughout and are required for setup and day-to-day tasks.
Tools such as [[https://man.archlinux.org/man/rg.1][ripgrep]], [[https://www.gnu.org/software/bash/][GNU Bash]], and [[https://en.wikipedia.org/wiki/Grep][grep/regex workflows]] are assumed.
- *At least one supported programming language*, such as C, C++, Java,
Python, Go, or Ruby. A solid understanding of the target language is
necessary to interpret analysis results and write effective queries.
See general background on [[https://en.wikipedia.org/wiki/Programming_language][programming languages]] if needed.
- *Basic familiarity with program structure concepts*, including
[[https://en.wikipedia.org/wiki/Abstract_syntax_tree][abstract syntax trees (ASTs)]], [[https://en.wikipedia.org/wiki/Control-flow_graph][control-flow graphs (CFGs)]], and
[[https://en.wikipedia.org/wiki/Data-flow_analysis][data-flow graphs (DFGs)]]. These are core to how CodeQL models code behavior.
- *Optional but helpful*: familiarity with structural or functional
programming languages (e.g. [[https://en.wikipedia.org/wiki/Lisp_(programming_language)][Lisp]] or [[https://en.wikipedia.org/wiki/OCaml][OCaml]]) can make working with
CodeQLs query language and type system more intuitive.
See overview of [[https://en.wikipedia.org/wiki/Functional_programming][functional programming]] for related context.
* Repository Layout
** Core Structure
- Repository is based on: https://github.com/github/vscode-codeql-starter.git
- All development work is done on the branch: qllab
- CodeQL version is pinned via the =ql/= submodule:
: commit 4d681f05bd671f8b5e31624f16a2b4d75e61c071 (tag: codeql-cli/v2.22.0)
- A prebuilt CodeQL CLI binary is included:
: 1104625939 assets/codeql-osx64.zip
- Project-specific repositories can be added directly under the root.
Example: the C dataflow workshop in =./codeql-dataflow-sql-injection=
** Additional Structure Notes
- The original upstream README.md is preserved at [[./README-vscode-codeql-starter.md]]
* Tool Setup
Some scripts are used here, found in [[./bin/]]. To ensure the ones written in
Python have access to prerequites, set up a virtual environment via
#+BEGIN_SRC sh
# 1. Create the virtualenv
python3 -m venv ~/codeql-lab/venv
# 2. Install any packages
source ~/codeql-lab/venv/bin/activate
pip install pyyaml
#+END_SRC
For any of these scripts to work, add them to the PATH via
#+BEGIN_SRC sh
export PATH="$HOME/codeql-lab/bin:$PATH"
#+END_SRC