I believe the GitLab CI entrypoint behaviour boils down to OCI configuration, compare Debian's image:
skopeo inspect --config docker://debian:12
...
"config": {
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"bash"
]
},
The images I generate via 'guix pack':
skopeo inspect --config
docker://registry.gitlab.com/debdistutils/guix/container:stage1
...
"config": {
"Env": [
"PATH=/gnu/store/5n0rm83hn6xwf57iwlrn6sfcr5bfjdv3-profile/bin"
]
},
Using `guix pack --entry-point` changes it into:
"config": {
"Env": [
"PATH=/gnu/store/0plsn32m4xzv4i9ixbx02d42nhbw5hx6-profile/bin"
],
"Entrypoint": [
"/gnu/store/0plsn32m4xzv4i9ixbx02d42nhbw5hx6-profile/bash"
]
},
However if we want the same behaviour as the debian:12 container image,
we want to set "Cmd" instead of "Entrypoint".
I found the code for this in guix/docker.scm and guix/scripts/pack.scm
but making changes this deep down is beyond me right now. Help?
IMHO the best would be if Guix container images looked like this:
"config": {
"Env": [
"PATH=/gnu/store/5n0rm83hn6xwf57iwlrn6sfcr5bfjdv3-profile/bin"
],
"Cmd": [
"bash"
]
},
Comparing some other well-known images, fedora:42 has:
"config": {
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"DISTTAG=f42container",
"FGC=f42",
"FBR=f42"
],
"Cmd": [
"/bin/bash"
],
"WorkingDir": "/",
"Labels": {
"maintainer": "Clement Verna \u003ccve...@fedoraproject.org\u003e"
}
},
AlmaLinux:8 and AlmaLinux:9 has:
"config": {
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/bash"
],
"WorkingDir": "/"
},
Alpine:latest has:
"config": {
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/sh"
],
"WorkingDir": "/"
},
ArchLinux:latest has:
"config": {
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"LANG=C.UTF-8"
],
"Cmd": [
"/usr/bin/bash"
],
"WorkingDir": "/",
Ubuntu:24.04 has:
"config": {
"Env": [
"PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
],
"Cmd": [
"/bin/bash"
],
/Simon
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