CLI Config Provider

cli_provider.go

package main

import (
	"flag"
	"strings"

	"github.com/urfave/cli"
)

// CLIProvider provides configuration from the cli.Context passed into an
// Action.
type CLIProvider struct {
	Context *cli.Context
}

// Provide implements the Provider interface.
func (clip CLIProvider) Provide() (map[string]string, error) {
	var config = make(map[string]string)

	// load all the route specific flags first
	flagNames := clip.Context.FlagNames()

	for _, flagName := range flagNames {
		value := clip.Context.Generic(flagName).(flag.Value)

		config[strings.ToUpper(flagName)] = value.String()
	}

	// then load the global flags
	globalFlagNames := clip.Context.GlobalFlagNames()

	for _, globalFlagName := range globalFlagNames {
		value := clip.Context.Generic(globalFlagName).(flag.Value)

		config[strings.ToUpper(globalFlagName)] = value.String()
	}

	return config, nil
}