`CIBW_CONTAINER_ENGINE` splits on `:` when it shouldn't

[makslevental]

Description

CIBW_CONTAINER_ENGINE="docker; create_args: -p=8080:8080"

gets parsed into

  container_engine: 
    name: docker
    create_args: ['-p=8080', ':', '8080']

problem is here

cibuildwheel/cibuildwheel/util.py

Line 710 in e5d0cc0

shlexer = shlex.shlex(key_value_string, posix=True, punctuation_chars=";:")

potential fix from here:

shlexer = shlex.shlex(key_value_string, posix=True, punctuation_chars=True)
shlexer.wordchars += ':'

with this change, CIBW_CONTAINER_ENGINE="docker; create_args : -p=8080:8080" (note the space after create_args) parses to fields=[['docker'], ['create_args', ':', '-p=8080:8080']].

[joerick]

Ah, that's unfortunate. A workaround would be to quote the create_args, e.g. CIBW_CONTAINER_ENGINE="docker; create_args: '-p=8080:8080'". However, I'll work on a fix too.

[joerick]

Fix for this in #1621

[makslevental]

@joerick - I had tried quoting various ways but couldn't get it to work. Thanks for the fix!