Correctly convert multi argument entrypoint

[cgzones]

Currently a compose entrypoint of

/usr/bin/tini -- wait-for-it opensearch:9200 -- /docker-entrypoint.sh

gets translated into

Entrypoint=/usr/bin/tini -- wait-for-it opensearch:9200 -- /docker-entrypoint.sh

while it should be

Entrypoint=["/usr/bin/tini", "--", "wait-for-it opensearch:9200", "--", "/docker-entrypoint.sh"]

[k9withabone]

Huh, I thought podman run --entrypoint worked the same way as the ENTRYPOINT instruction in a Containerfile/Dockerfile (using the string form as an argument to /bin/sh -c), but after testing it out just now it seems that it doesn't.

Do you know how Docker Compose works with the different forms for entrypoint? Does it act like docker run --entrypoint (which presumably works the same as Podman), or like the ENTRYPOINT instruction (in which case the correct conversion would add "/bin/sh", "-c" to the beginning)? The Compose Specification is frustratingly vague on if the entrypoint string form can even contain multiple arguments.

As a workaround, you can use a list/array for the Compose service entrypoint as well:

services:
  foo:
    image: bar
    entrypoint: ["/usr/bin/tini", "--", "wait-for-it opensearch:9200", "--", "/docker-entrypoint.sh"]

Which converts to:

# foo.container
[Container]
Entrypoint=["/usr/bin/tini","--","wait-for-it opensearch:9200","--","/docker-entrypoint.sh"]
Image=bar