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Put value at path

Consider the example input YAML file:

conf.yaml
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root_node:
  level_one:
    pswd: password
    usr: name

A new key-value can be added, for example:

cat conf.yaml | rickle obj put /root_node/level_one/email not@home.com

Results in the added key:

root_node:
  level_one:
     pswd: password
     usr: name
     email: not@home.com

Any path input to put will be created:

cat conf.yaml | rickle obj put /root_node/level_one/config/host/address 127.0.0.1

Results in the added key:

root_node:
  level_one:
     pswd: password
     usr: name
     email: not@home.com
     config:
        host:
           address: 127.0.0.1