Published image does not have CMD set

[dry nacelle]

Hi everyone,

I am using Dagger to create a couple of Docker images in a Jenkins pipeline. My code is structured as follows:

• BuildEnv method: This method creates the Docker image using From, WithExec, and WithDefaultTerminalCmd.
• Publish method: This method publishes the container returned by the BuildEnv method.

The container I'm building in the BuildEnv method has an entrypoint that I previously set in the Dockerfile using the CMD directive. I assumed that WithDefaultTerminalCmd in Dagger would function the same as CMD, but it doesn't seem to work as expected. When I run the container, it immediately exits without executing the entrypoint, which is a simple shell script

[toxic pelican]

you can use the entrypoint by setting the UseEntrypoint arg on WithExec and family
But not sure about Terminal - cc @thick shuttle

[dry nacelle]

I cannot use the entrypoint unfortunately that's why I was looking to use CMD

[thick shuttle]

• CMD → Container.withDefaultArgs
• ENTRYPOINT → Container.withEntrypoint

The "terminal" stuff relates to running a shell with dagger call, i.e., it's dagger specific and doesn't set any OCI metadata. Example:

❯ dagger core container from --address=bash terminal

To execute CMD, you need a Container.withExec, with empty arguments:

ctr.WithExec([]string{})

[dry nacelle]

That makes sense. I didn't even see the WithDefaultArgs method. Thank you very much, I'll try it immediately