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Learn how to dynamically reference template file names in Azure DevOps pipelines using the repository name. Explore code examples and best practices!
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Accessing Dynamic Template Names in Azure DevOps Pipelines

When working with Azure DevOps pipelines, you might find yourself needing to refer to template files that are determined by specific conditions, such as the repository name. The challenge here is how to set up a pipeline so that it dynamically references these templates based on current conditions, such as when switching from one repository to another. In this guide, we'll delve into how to achieve this by dynamically referencing template names in your variables and parameters.

The Problem Statement

Imagine you want to define a variable template name that adapts according to the repository name. Here's a simple example of a code snippet that demonstrates a common setup:

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In the above setup, the expression variables['Build.Repository.Name'] is not being resolved as intended. Instead, it is treated literally. This can be a frustrating issue, as it hinders the adaptability of your pipeline configuration.

Moreover, you may have also tried using parameters for this purpose:

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While this approach seems logical, it doesn't yield the expected results, especially when trying to reference dynamic variable names in the parameters.

Solution Overview

Dynamic Template Reference

To dynamically reference template names in Azure DevOps, you can utilize the following format:

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This syntax correctly resolves the repository name and allows you to specify the template file dynamically.

Working with Parameters

If you need to access a dynamic variable name, consider using the following setup for defining the parameter:

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In this configuration, concat will form the complete variable name based on the repository name.

Example of Defining a List Variable

If you want to handle a list of values in your variable template, you can define it as follows:

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You can leverage the contains method to check if a certain value exists within this list, thus increasing your pipeline's flexibility.

Conclusion

Achieving dynamic template referencing in Azure DevOps pipelines is possible with the right syntax and approach. Using the ${{ }} syntax allows for dynamic resolution of template names based on repository conditions. Additionally, you can create truly dynamic variable names that change according to your pipelines' needs by leveraging the concat method.

By applying these techniques, you can enhance your pipelines' adaptability, enabling them to adjust seamlessly to different environments, repositories, and conditions.

With these powerful features at your disposal, working with Azure DevOps pipelines becomes much more efficient and less error-prone. Happy coding!