[Task] Dockefile to Dofigen sub-command

[taorepoara]

What should be done

Create a new CLI sub-command to generate a Dofigen configuration from a Dockerfile.

The sub-command should be parse and by default, it will parse the Dockerfile and .dockerignore of the current directory to create a dofigen.yml file in the same dir.

Here are some options for this sub-command:

• --file or -f: the path to the Dockerfile. If the value is -, the Dockerfile data will be read from the STDIN. Default value: Dockerfile
• --output, --out or -o: the path to the generated Dofigen configuration file. If the value is -, the Dofigen conf will be written to the STDOUT. Default value dofigen.yml
• --language, --lang or -l: The expected output language. Value is not case sensitive and is one of yaml (yml is allowed as an alias), json and jsonc (JSON with comments). The default value is yaml

The output and language options are linked.
Here is a table of the possible values and behaviour:

output option	language option	Applied output	Applied language
Not defined	Not defined	dofigen.yml	yaml
dofigen.yml	Not defined	dofigen.yml	yaml
dofigen.yaml	Not defined	dofigen.yaml	yaml
Not defined	yaml	dofigen.yml	yaml
Not defined	yml	dofigen.yml	yaml
dofigen.wtf	yaml	dofigen.wtf	yaml
dofigen.json	Not defined	dofigen.json	jsonc
Not defined	jsonc	dofigen.json	jsonc
Not defined	json	dofigen.json	json

Technical recommendation

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Ecological concerns

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Is this task linked with any other ?

#348