a CMD provided in an appendix is ignored at run (not during build)

[itcarroll]

Bug description

The use of CMD in an appendix is not igrnored for build but is somehow ignored for run.

Expected behaviour

$ repo2docker --appendix 'CMD ["jupyter", "lab", "--ip", "0.0.0.0", "--no-browser"]' <source-repository>

Should build and run a docker container using the command defined by CMD.

Actual behaviour

The image is built with the CMD, but still runs with the "built-in" CMD. I don't know how.

Here's the end of the build

Step 51/52 : CMD ["jupyter", "notebook", "--ip", "0.0.0.0"]
 ---> Running in e62e373bfe20
Removing intermediate container e62e373bfe20
 ---> 7b31488d3ac1
Step 52/52 : CMD ["jupyter", "lab", "--ip", "0.0.0.0", "--no-browser"]
 ---> Running in ceba06478f9a
Removing intermediate container ceba06478f9a
 ---> 7ace45a225ff

But then jupyter notebook launches. If instead I docker run 7ace45a225ff, then I get jupyter lab.

Your personal set up

• OS: macOS Sonoma 14.7
• Docker version:

GSLAL0320120132 % docker version                                                                                                                                                                   25T16:41
Client:
 Cloud integration: v1.0.23
 Version:           20.10.14
 API version:       1.41
 Go version:        go1.16.15
 Git commit:        a224086
 Built:             Thu Mar 24 01:49:20 2022
 OS/Arch:           darwin/amd64
 Context:           default
 Experimental:      true

Server: Docker Desktop 4.7.0 (77141)
 Engine:
  Version:          20.10.14
  API version:      1.41 (minimum version 1.12)
  Go version:       go1.16.15
  Git commit:       87a90dc
  Built:            Thu Mar 24 01:46:14 2022
  OS/Arch:          linux/amd64
  Experimental:     false
 containerd:
  Version:          1.5.11
  GitCommit:        3df54a852345ae127d1fa3092b95168e4a88e2f8
 runc:
  Version:          1.0.3
  GitCommit:        v1.0.3-0-gf46b6ba
 docker-init:
  Version:          0.19.0
  GitCommit:        de40ad0

• repo2docker version: 2024.07.0