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About CodeQL packs and the CodeQL CLI

CodeQL packs are used to create, share, depend on, and run CodeQL queries and libraries.

You can use the pack command in the CodeQL CLI to create CodeQL packs, add dependencies to packs, and install or update dependencies. You can also publish and download CodeQL packs using the pack command.

Creating a CodeQL pack

You can create a CodeQL pack by running the following command from the checkout root of your project:

codeql pack init <scope>/<pack>

You must specify:

• <scope>: the name of the GitHub organization or user account that you will publish to.

• <pack>: the name for the pack that you are creating.

The codeql pack init command creates the directory structure and configuration files for a CodeQL pack. By default, the command creates a query pack. If you want to create a library pack, you must edit the qlpack.yml file to explicitly declare the file as a library pack by including the library:true property.

Creating a CodeQL model pack

Model packs can be used to expand code scanning analysis to recognize libraries and frameworks that are not supported by default. Model packs use data extensions, which are implemented as YAML and describe how to add data for new dependencies. When a model pack is specified, the data extensions in that pack will be added to the code scanning analysis automatically. For more information about CodeQL model packs and data extensions, see Using the CodeQL model editor.

A model pack is a CodeQL pack with the following characteristics in the qlpack.yml file:

• It defines library: true.
• It has no dependencies.
• It has one or more extensionTargets.
• It has a dataExtensions property that points to one or more data extension files.

A model pack will inject its specified data extensions into each query pack that is named in extensionTargets, if it falls within the specified version range. For example:

name: my-repo/my-java-model-pack
version: 1.2.3
extensionTargets:
  codeql/java-all: ~1.2.3
  codeql/util: ~4.5.6
dataExtensions:
  - models/**/*.yml

In this example, the model pack will inject all the data extensions in models/**/ into a codeql/java-all query pack that is at a version from 1.2.3 up to and including 1.3.0, and a codeql/util query pack that is at a version from 4.5.6 up to and including 4.6.0. For more information, see Using semantic versioning in the npm documentation and the Semantic versioning specification.

Once you've created a model pack, you can publish it in the same way as other CodeQL packs. For more information, see Publishing and using CodeQL packs. You can then use published model packs in a code scanning analysis with the --model-packs option. For more information, see Customizing analysis with CodeQL packs.

Adding and installing dependencies on a CodeQL pack

You can add dependencies on CodeQL packs using the command codeql pack add. You must specify the scope, name, and (optionally) a compatible version range.

codeql pack add <scope>/<name>@x.x.x <scope>/<other-name>

If you don’t specify a version range, the latest version will be added. Otherwise, the latest version that satisfies the requested range will be added.

This command updates the qlpack.yml file with the requested dependencies and downloads them into the package cache. Please note that this command will reformat the file and remove all comments.

You can also manually edit the qlpack.yml file to include dependencies and install the dependencies with the command:

codeql pack install

This command downloads all dependencies to the shared cache on the local disk.

Organizing a CodeQL pack's directory structure

A CodeQL pack must contain a file called qlpack.yml in its root directory. In the qlpack.yml file, the name: field must have a value that follows the format of <scope>/<pack>, where <scope> is the GitHub organization or user account that the pack will be published to and <pack> is the name of the pack.

Additionally, query packs and library packs with CodeQL tests contain a codeql-pack.lock.yml file that contains the resolved dependencies of the pack. This file is generated during a call to the codeql pack install command, is not meant to be edited by hand, and should be added to your version control system.

The other files and directories within the pack should be logically organized. For example, typically:

• Queries are organized into directories for specific categories.
• Queries for specific products, libraries, and frameworks are organized into their own top-level directories.

Customizing a downloaded CodeQL pack

The recommended way to experiment with changes to a pack is to clone the repository containing its source code.

If no source repository is available and you need to base modifications on a pack downloaded from the Container registry, be aware that these packs are not intended to be modified or customized after downloading, and their format may change in the future without much notice. We recommend taking the following steps after downloading a pack if you need to modify the content:

• Change the pack name in qlpack.yml so you avoid confusion with results from the unmodified pack.

• Remove all files named *.qlx anywhere in the unpacked directory structure. These files contain precompiled versions of the queries, and in some situations CodeQL will use them in preference to the QL source you have modified.