Tilt: Live Update with Buildah

[bandrade]

I would like to run live update as oriented on https://github.com/windmilleng/tilt-example-java/blob/master/4-recommended/Tiltfile#L19-L28 but with buildah instead of Docker. I tried to add using the following method:

custom_build(
  'backend-java-image',
  './build/jar',
  'buildah bud -t $EXPECTED_REF . && buildah push $EXPECTED_REF $EXPECTED_REF',
  ['./backend-java-image'],
  skips_local_docker = True,
  live_update = [
    sync('./build/jar/BOOT-INF/lib', '/app/lib'),
    sync('./build/jar/META-INF', '/app/META-INF'),
    sync('./build/jar/BOOT-INF/classes', '/app'),
  ],
  entrypoint = 'find . | entr -r java -noverify -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005 -cp .:./lib/* br.com.example.ExampleApplication')

But the following error was thrown:

Successfully loaded Tiltfile (3.991286ms)                                                                                      
       Traceback (most recent call last):                                                                                             
        Tiltfile:10:13: in <toplevel>                                                    
         <builtin>: in custom_build                                                                                                   
       Error: custom_build: for parameter deps: got string, want list

If we remove './build/jar' parameter, the following error is thrown:

URL: http://localhost:5005/ • http://localhost:8000/                                                                              
    ERROR:                                                                                                                            
       STEP 5: ADD BOOT-INF/lib /app/lib                                                                                              
       error building at STEP "ADD BOOT-INF/lib /app/lib": no files found matching                                                    
       "app/BOOT-INF/lib": no such file or directory                                          
       level=error msg="exit status 1"

Looks that custom_build doesn't have the parameter to specify the source directory in order to live update work.
https://github.com/windmilleng/tilt/blob/772d5b0c12abd66fea6dc72127442ad5ad9932be/internal/tiltfile/tiltfile_test.go#L2078
https://docs.tilt.dev/custom_build.html#buildah-or-any-image-builder-indepdendent-of-docker

[msmagnanijr]

+1

[nicks]

I've used buildah before, let me take a poke at this, I think this might be an easy misunderstanding. In particular, from
https://docs.tilt.dev/custom_build.html#buildah-or-any-image-builder-indepdendent-of-docker
it looks like you have the parameters in the wrong order.

[nicks]

OK, here's an example Tiltfile that I just pushed up.
https://github.com/windmilleng/tilt-example-java/blob/nicks/buildah/4-recommended/Tiltfile

Some notes:

• The Docker build context is build/jar, so the Docker build context in your buildah invocation needs to look like: buildah bud -t $EXPECTED_REF build/jar
• You got the skips_local_docker=True right!
• I needed to do some configuration work to make sure local registries (like Kind or Microk8s) work correctly with Buildah, this involved adding:

[registries.insecure]
registries = ['localhost:32000', 'localhost:5000']

to /etc/containers/registries.conf, though I'm not an expert on buildah configuration and this might be different on different platforms.

I think buildah_build would make a cool Tilt extension! https://github.com/windmilleng/tilt-extensions

[msmagnanijr]

OK, here's an example Tiltfile that I just pushed up.
https://github.com/windmilleng/tilt-example-java/blob/nicks/buildah/4-recommended/Tiltfile

Some notes:

• The Docker build context is build/jar, so the Docker build context in your buildah invocation needs to look like: buildah bud -t $EXPECTED_REF build/jar
• You got the skips_local_docker=True right!
• I needed to do some configuration work to make sure local registries (like Kind or Microk8s) work correctly with Buildah, this involved adding:

[registries.insecure]
registries = ['localhost:32000', 'localhost:5000']

to /etc/containers/registries.conf, though I'm not an expert on buildah configuration and this might be different on different platforms.

I think buildah_build would make a cool Tilt extension! https://github.com/windmilleng/tilt-extensions

Thanks a lot Man! Worked like a charm.

[bandrade]

I think buildah_build would make a cool Tilt extension! https://github.com/windmilleng/tilt-extensions.

Yeah, I would be awesome, hope we can contribute and add it in the future.

Thanks a lot Nick.