No stacks found for "custom" on Azure Functions v4

[Kenerator]

Environment/Versions

• macOS Sonoma Version 14.6 (23G80)
• Visual Studio Code v1.98.0
• azure-functions-core-tools@4 v4.0.6821
• Azure Functions for Visual Studio Code v1.16.2
• Azure Resources for Visual Studio Code (Preview) v0.10.7
• Go for Visual Studio Code v0.46.1

Description
When attempting to create a simple Azure Function in Golang, using the Custom Handler example provided at learn.microsoft.com, the tool fails with an error message saying: No stacks found for "custom" on Azure Functions v4.

Steps to reproduce

• With the above-mentioned tools installed, follow the steps in the tutorial given at this link:
  learn.microsoft.com
• At section "Create the function app in Azure", step # 2/3, there is no prompt for "Select a runtime stack"
• At section "Create the function app in Azure", step # 2/3, after selecting a location/region, the error message is displayed: No stacks found for "custom" on Azure Functions v4.

[Kenerator]

More information and a workaround are described here...
https://learn.microsoft.com/en-us/answers/questions/2202570/

[clairewood]

I'm having this same issue when creating a Rust function app

[nturinski]

Could you share a screenshot of the error that you're seeing?

[mikerossiter]

Same here. Trying to follow the tutorial to create an Azure Function in Rust. "No stacks found for "custom" on Azure Functions v4. I'm using updated version of VS Code on Debian with latest core tools installed.

[mikerossiter]

I had some success doing this.
In .vscode/settings.json change "azureFunctions.projectLanguage": "Custom", to "azureFunctions.projectLanguage": "custom",
like literally change the "C" in Custom to a lower case "c".

Then I stopped getting the error but still there was no Rust or Go in the stacks so I selected Node 20.

[mikerossiter]

I got the app function to work with a curl command but the vs code execute function returned a HTTP method not allowed so I'm still blocked on that front but it ultimately worked. More support is needed though.

[nturinski]

Thanks for investigation @mikerossiter. I'll have to investigate why custom doesn't return any stacks. Is this happening when you're creating the local Function project or the function app in Azure?

Also related to #4497

[mikerossiter]

Thanks for investigation @mikerossiter. I'll have to investigate why custom doesn't return any stacks. Is this happening when you're creating the local Function project or the function app in Azure?

Also related to #4497

Not locally but only when I connect VS Code to Azure so not sure if it's specific to the plugin. Thanks. Locally it worked fine.

[nturinski]

Okay, thanks for help. It sounds like I'll have to investigate why the stacks API isn't returning anything for custom.