Why does clearing App Platform's build cache not work as expected?

Hi everyone, hope you’re having a wonderful Monday.

I’ve been getting increasingly frustrated over a problem I’ve been having with App Platform since the start - whenever I clear the build cache in hope of fetching updated versions of my other repos.

To clarify, I have a Python application(A) running in the App Platform, which is reliant on another repository hosted on GitHub(B). We download it and put it into the environment at build time, using build commands. We fetch versions based on tagging.

Whenever I release a new version of B, I need to re-build A. I do this with “clear build cache”, expecting the latest version of B to be fetched. In nearly all cases, A is built with the old version.

How can I make sure that the entire build cache is cleared?

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Bobby Iliev
Site Moderator
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July 4, 2023

Hey there 👋,

Hope that you are having a great start of the week too!

It sounds like the problem might be related to the fact that there have been no code changes to repo A. As a workaround, what you could do is introduce a dependency file where you change the tag version of your repo B. For example, if you were to add a file called repo_b_version to your repo A, then you could use the information in there for your build command and change the contents of that file so that it would trigger a new build each time that file is updated with the new version.

You could get the version from the dependency file in your build command using the cat command for example, e.g. version=$(cat repo_b_version).

If this workaround does not fit your needs, please reach out to our amazing support team who might be able to further assist you with the problem! :)

Hope that helps!

- Bobby.

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