Work around for YTT mixins

input.yml

version: "3.7"

---
#@ load( "@ytt:template", "template" )

#@ def init_bash_shell( service_name ):
#@overlay/match by=overlay.all
#@overlay/match-child-defaults missing_ok=True
---
services:
  #@yaml/text-templated-strings
  (@= service_name @):
    environment:
      BASH_ENV: //mnt/dot-bashrc/.bashrc
    volumes:
      #@overlay/append
      - type: volume
        source: dot-bashrc
        target: //mnt/dot-bashrc
        read_only: true
    
#@ end

#@ def init_ash_shell( service_name ):
--- #@ template.replace( init_bash_shell( service_name ) )
#@overlay/match by=overlay.all
#@overlay/match-child-defaults missing_ok=True
---
services:
  #@yaml/text-templated-strings
  (@= service_name @):
    environment:
      ENV: //mnt/dot-bashrc/.bashrc sh
      #@overlay/remove
      BASH_ENV:
      
#@ end

---
#@ load( "@ytt:template", "template" )
#@ load( "@ytt:overlay", "overlay" )
#@overlay/match by=overlay.all
#@overlay/match-child-defaults missing_ok=True
---
#@overlay/assert
version: '3.7'

services:
  first:
    image: bash:5
    volumes:
    - other://root

--- #@ template.replace( init_bash_shell( "first" ) )

---
#@ load( "@ytt:template", "template" )
#@ load( "@ytt:overlay", "overlay" )
#@overlay/match by=overlay.all
#@overlay/match-child-defaults missing_ok=True
---
#@overlay/assert
version: '3.7'

services:
  second:
    image: busybox

--- #@ template.replace( init_ash_shell( "second" ) )