error: Could not unmarshal '<nil>' to type <nil>

[Hashfyre]

Platform:
os: OS X Yosemite - 10.10.5 (14F2109)
kompose: version 0.1.2 (92ea047)
compose-file:

version: '2'
services:
  <project>:
    build:
      context: .
      args:
        GIT_TOKEN:
    image: <private-img>
    links:
      - db_live
    depends_on:
      - db_live
    ports:
      - 28090:80
    environment:
      DB_HOST: db_live
  db_live:
    image: mysql:5.6
    ports:
      - 23306:3306
    environment:
      MYSQL_ROOT_PASSWORD: <passwd>
      MYSQL_DATABASE: <project>
      MYSQL_USER: <project>
      MYSQL_PASSWORD: <passwd>

Angular brackets are indicative of replacement text.

Command:

• kompose -f docker-compose.yml convert

Error Output:

• ERRO[0000] Could not parse config for project <project> : Cannot unmarshal '<nil>' to type <nil> into a string value

[cdrage]

@kadel Could it be because GIT_TOKEN is passed as GIT_TOKEN: ?

[cdrage]

@kadel @Hashfyre

Yup.. Seems that a blank GIT_TOKEN: is the cause of the issue, removing it I don't have an error:

    MYSQL_USER: foo                                                                                                                                                                                                                                                         [0/49]
  image: mysql:5.6
  ports:
  - 23306:3306
foo:
  build:
    args:
      GIT_TOKEN: null
    context: .
  depends_on:
  - db_live
  environment:
    DB_HOST: db_live
  image: foo
  links:
  - db_live
  ports:
  - 28090:80
 
ERRO Could not parse config for project wikus : Cannot unmarshal '<nil>' to type <nil> into a string value 
FATA Failed to load compose file: Cannot unmarshal '<nil>' to type <nil> into a string value 

~                                                                                                                                                                                                                                                                               ⍉
▶ vim docker-compose.yml

~                                                                                                                                                                                                                                                                                
▶ kompose convert       
WARN Unsupported depends_on key - ignoring        
WARN Kubernetes provider doesn't support build key - ignoring 
INFO file "db_live-service.yaml" created          
INFO file "foo-service.yaml" created              
INFO file "db_live-deployment.yaml" created       
INFO file "foo-deployment.yaml" created         

[cdrage]

@Hashfyre

Could you change your docker-compose file to use this instead?

args:
  - GIT_TOKEN

instead of

args:
 GIT_TOKEN:

[kadel]

I have yet to check this deeper, but it looks like that that error message is coming from libcompose. We should check if libcompose has the same problem parsing it.

[Hashfyre]

The same syntax works as per docker-compose. As in, the compose file works with:
docker-compose up -d --build
once I have exported GIT_TOKEN to my shell.

Currently, the following syntax works with kompose -f docker-compose.yml convert:

      args:
        - GIT_TOKEN

with output,

WARN[0000] Unsupported key build - ignoring
WARN[0000] Unsupported key depends_on - ignoring
INFO[0000] file "db_live-service.json" created
INFO[0000] file "app-service.json" created
INFO[0000] file "db_live-deployment.json" created
INFO[0000] file "app-deployment.json" created

If docker-compose supports the initial syntax of

      args:
        GIT_TOKEN:

shouldn't kompose also support it?
Also, from the output's WARN messages, we see build and depends_on keys seem to be unsupported, which could be because k8s doen't support builds.

I think this solves my issue, but do look into whether you could support a syntax already supported by docker-compose to retain 1:1 correspondence.

[surajssd]

@Hashfyre thanks for the feedback, build support for k8s is WIP and @rtnpro is looking at it right now in #97