Stdout shouldn't output warning / logging messages.

[cdrage]

When doing --stdout. I don't think is should be outputting. --surpress-warnings should be set by default if passing in --stdout

WARN[0000] Unsupported key network_mode - ignoring      
WARN[0000] Unsupported key build - ignoring             
WARN[0000] Unsupported key depends_on - ignoring        
WARN[0000] Unsupported key tty - ignoring               
WARN[0000] [anitya-postgres] Service cannot be created because of missing port. 
WARN[0000] Failed to configure container volume: invalid volume format: ./lib/cucoslib:/usr/lib/python3.5/site-packages/cucoslib:ro,z 
WARN[0000] Failed to configure container volume: invalid volume format: ./server/bayesian:/usr/lib/python3.5/site-packages/bayesian:ro,z 
WARN[0000] Failed to configure container volume: invalid volume format: ./server/kerberos/keytab:/mnt:ro,z 
WARN[0000] Failed to configure container volume: invalid volume format: ./server/coreapi-httpd.conf:/etc/httpd/conf.d/coreapi-httpd.conf:ro,z 
WARN[0000] Failed to configure container volume: invalid volume format: ./server/:/coreapi/:ro,z 
WARN[0000] [redis-populate] Service cannot be created because of missing port. 
WARN[0000] [beat-scheduler] Service cannot be created because of missing port. 
WARN[0000] Failed to configure container volume: invalid volume format: ./lib/cucoslib:/usr/lib/python2.7/site-packages/cucoslib:ro,z 
WARN[0000] [worker] Service cannot be created because of missing port. 
WARN[0000] Failed to configure container volume: invalid volume format: ./lib/cucoslib:/usr/lib/python3.5/site-packages/cucoslib:ro,z 
WARN[0000] Failed to configure container volume: invalid volume format: ./mercator/mercator:/usr/lib/python3.5/site-packages/mercator:ro,z 
WARN[0000] Failed to configure container volume: invalid volume format: ./lib/hack/secrets.yaml:/var/lib/secrets/secrets.yaml:ro,z 

[kadel]

Those warning are on stderr. So it shouldn't cause any problems. Some of the warning are quite important as they are informing about things that can make application non working properly (like missing port, or skipped volumes)

[sebgoa]

agreed with kadel.

$ ./kompose -f ./examples/docker-voting.yml convert --stdout > foobar
WARN[0000] [worker] Service cannot be created because of missing port. 
sebair: kompose (preference)$ cat foobar | more
{
  "kind": "List",
  "apiVersion": "v1",