59 lines
1.5 KiB
Go
59 lines
1.5 KiB
Go
package cfg
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import (
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"fmt"
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"os"
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"github.com/alecthomas/kong"
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)
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type AppSettings struct {
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ServerAddress string
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DataFile string
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DataURL string
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}
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var cliStruct struct {
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ServerAddress string `name:"listen-address" env:"GEOIP_LISTEN_ADDRESS" help:"Address to use for the metrics server" default:"${default_address}"`
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DataFile string `name:"data-file" env:"GEOIP_DATA_FILE" help:"path to data file" default:"${default_file_path}"`
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DataURL string `name:"data-url" env:"GEOIP_DATA_URL" help:"url to data file" default:"${default_file_url}"`
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}
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func Parse() *AppSettings {
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ctx := kong.Parse(
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&cliStruct,
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kong.Vars{
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"default_address": ":8080",
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"default_file_path": "./data.csv",
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"default_file_url": "https://data.example.com/test.csv",
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},
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kong.Name("country_geo_locations"),
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kong.Description("🚀 Start a simple web server for GeoIP data"),
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kong.UsageOnError(),
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)
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validateFlags(ctx)
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settings := &AppSettings{
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ServerAddress: cliStruct.ServerAddress,
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DataFile: cliStruct.DataFile,
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DataURL: cliStruct.DataURL,
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}
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return settings
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}
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func validateFlags(cliCtx *kong.Context) {
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var flagsValid = true
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var messages = []string{}
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if cliStruct.ServerAddress == "" {
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messages = append(messages, "error: invalid server address, must not be blank")
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flagsValid = false
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}
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if !flagsValid {
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cliCtx.PrintUsage(false)
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fmt.Println()
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for i := 0; i < len(messages); i++ {
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fmt.Println(messages[i])
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}
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os.Exit(1)
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}
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}
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