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How to change GitHub Actions run_number

Andrei Fedotov
I write here some notes
・1 min read

Hello everyone!

What we have

We use the well-known schema for versioning the product builds:


For example: 3.2.1234.0.

We use GitHub Actions for CI/CD needs. We use GitHub's run_number value as a build number.

The challenge

Recently we faced a challenge to set an offset for different types of build (e.g. production/test builds).

Searching over the internet had a lack of answers to the question of how to change run_number or how to increment it.

The solution

After a good bit of time spent on documentation investigation, we came up with a solution. Assume run_number is 1000. And we want the build number to be 5000. And the final product version we want to have 3.2.5000.0 We can do the following as separate step in the workflow:

    - name: Set version number
      run: |
        $version = "3.2."+(4000+$($Env:GITHUB_RUN_NUMBER))+".0"
        echo $version
        echo "VERSION_NUMBER=$version" | Out-File -FilePath $Env:GITHUB_ENV -Encoding utf-8 -Append
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That's it. Now the variable VERSION_NUMBER contains the value 3.2.5000.0.

And we can use that value across the workflow like this (e.g. we construction installer package name that containing the version):

MyProduct.${{ env.VERSION_NUMBER }}.msi.

Hope this would be helpful for you.


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