support simple cli

[podhmo]

like net/http handler, lift action to simple cli interface.

• in web, action -> net/http.Handler
• in cli, action -> ????

[podhmo]

maybe use translate package internally

[podhmo]

simulation

if taking the action, definition is following.

type HelloOutput struct {
        Message string `json: "message"`
}

type HelloInput struct {
     Name string `json:"name"`
}
func Hello(ctx context.Context, logger *log.Logger, input HelloInput) (*HelloOutput, error) {
        logger.Printf("hello")
        return &HelloOutput{Message: "hello " + input.Name}, nil
}

[podhmo]

• display output ?
• how to get components (in this case, logger)
• how to handle primitive arguments (in web, these are treated as path parameter)
• how to handle primitive pointer arguments (in web, these are treated as query-string)
• how to handle data

[podhmo]

If implements correctly, be able to run generated code, like something below.

$ hello -name foo
hello
{"message": "hello foo"}

• display by json.Encoder
• convert struct to flag options

But, but How should I handle primitive arguments (and primitive pointer arguments) ?

[podhmo]

And how should I handling config for components ? (e.g. log.NewLogger() 's io.Writer and flags)

[podhmo]

• set the value of config from environment variable
• pass the values for data with file
• convert primitive pointer to cli flags
• convert primitive value to ??? -- poisitional arguments?

$ DEBUG=1 hello --data <(echo '{"name": "foo"}') --verbose 111

[podhmo]

more simply, all value is passed by stdin.

$ echo '{"data": {"name": "foo"}, "verbose": true}' | hello -debug

[podhmo]

https://github.com/podhmo/apikit/blob/70d7902ea2b309d3d90d610c3072e836f4be15d5/resolve/def.go#L54-L63