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CodeQL can scan C# projects without requiring working builds (public beta)

CodeQL, the static analysis engine that powers GitHub code scanning, can now analyze C# projects without needing a build. This public beta capability enables organizations to more easily roll out CodeQL at scale. Previously, CodeQL required a working build to analyze C# projects. By removing that requirement, our large-scale testing has shown that CodeQL can be successfully enabled for over 90% of C# repos without manual intervention.
This new way of analyzing C# codebases is now enabled by default for all code scanning users on GitHub.com. CodeQL CLI users can enable this feature using the build-mode: none flag, starting with version 2.17.6.

Repositories with an existing code scanning setup, default or advanced, will not experience any changes. If code scanning is working for you today it will continue to work as-is, and there is no need to change your configuration.

  • Repositories using code scanning default setup will automatically benefit from this new analysis approach.
  • Repositories using advanced setup for code scanning via workflow files will have the option to choose a build-mode. The default value for newly configured C# repositories will be build-mode: none.
  • CodeQL CLI users will not experience any change in the default behaviour, for compatibility with existing workflows. Users that want to enable this feature can now use the --build-mode none option. Generally, you should set the --build-mode option when using the CLI to make it easier to debug and persist the configuration should default behaviour change at any point in the future.

The new mechanism for scanning C# is available on GitHub.com and will be available with CodeQL CLI 2.17.6. While in public beta, this feature will not be available on GitHub Enterprise Server for default setup or advanced setup for code scanning. As we continue to work on scanning C# projects without the need for working builds, send us your feedback.

You can now use the REST API to create and manage code security configurations, as well as attach them to repositories at scale.

The API supports the following code security configuration actions for organizations:
– Create, get, update, and delete configurations
– Set and retrieve default configurations
– List all configurations
– Attach configurations to repositories

The API is now available as a public beta on GitHub Enterprise Cloud and will be available in GitHub Enterprise Server 3.15.0. You can learn more about security configurations, the REST API, or send us your feedback.

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GitHub is committed to a secure software ecosystem and requires most developers who contribute code on GitHub.com to enable one or more forms of two-factor authentication (2FA).To ensure that all users stay up to date with their account security configurations, we are now improving the checkup experience using various global banners that guide users to review and update their settings on a more regular basis.

These banners replace the security checkup interstitials that were previously displayed every 3 months for 2FA users. Each banner calls out the specific security configuration that needs attention (ex: user only having a single verified email), and will also include a quick link to the corresponding settings page to modify the required settings.

To learn more about the 2FA program, see our April 2024 blog post about how GitHub is securing millions of developers using 2FA, as well as the “About the mandatory 2FA program” documentation.

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