You can use a variety of tools to set up code scanning in your repository. For more information, see "Setting up code scanning for a repository."
The log and diagnostic information available to you depends on the method you use for code scanning in your repository. You can check the type of code scanning you're using in the Security tab of your repository, by using the Tool drop-down menu in the alert list. For more information, see "Managing code scanning alerts for your repository."
You can see analysis and diagnostic information for code scanning run using CodeQL analysis on GitHub.
Analysis information is shown for the most recent analysis in a header at the top of the list of alerts. For more information, see "Managing code scanning alerts for your repository."
Diagnostic information is displayed in the Action workflow logs and consists of summary metrics and extractor diagnostics. For information about accessing code scanning logs on GitHub, see "Viewing the logging output from code scanning" below.
If you're using the CodeQL CLI outside GitHub, you'll see diagnostic information in the output generated during database analysis. This information is also included in the SARIF results file you upload to GitHub with the code scanning results.
For information about the CodeQL CLI, see "Configuring CodeQL CLI in your CI system."
You can see more detailed information about CodeQL extractor errors and warnings that occurred during database creation by enabling debug logging. For more information, see "Troubleshooting the CodeQL workflow."
This section applies to code scanning run using GitHub Actions (CodeQL or third-party).
After setting up code scanning for your repository, you can watch the output of the actions as they run.
Under your repository name, click Actions.
You'll see a list that includes an entry for running the code scanning workflow. The text of the entry is the title you gave your commit message.
Click the entry for the code scanning workflow.
Click the job name on the left. For example, Analyze (LANGUAGE).
Review the logging output from the actions in this workflow as they run.
Once all jobs are complete, you can view the details of any code scanning alerts that were identified. For more information, see "Managing code scanning alerts for your repository."
Note: If you raised a pull request to add the code scanning workflow to the repository, alerts from that pull request aren't displayed directly on the Code scanning page until the pull request is merged. If any alerts were found you can view these, before the pull request is merged, by clicking the n alerts found link in the banner on the Code scanning page.