add grafana package & temporary debug checks

cfg/cfg.go

@@ -0,0 +1,55 @@
+package cfg
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/alecthomas/kong"
+)
+
+type AppSettings struct {
+	GrafanaURL string
+	Token      string
+}
+
+var cliStruct struct {
+	GrafanaURL string `name:"grafana-url" env:"GRAFANA_URL" help:"Grafana URL to access the API"`
+	AuthToken  string `name:"grafana-auth-token" env:"GRAFANA_AUTH_TOKEN" help:"Grafana auth token to access the API"`
+}
+
+func Parse() *AppSettings {
+	ctx := kong.Parse(
+		&cliStruct,
+		kong.Name("grafana-backuper"),
+		kong.Description("🚀 CLI tool to backup grafana dashboards"),
+		kong.UsageOnError(),
+	)
+
+	validateFlags(ctx)
+	settings := &AppSettings{
+		GrafanaURL: cliStruct.GrafanaURL,
+		Token:      cliStruct.AuthToken,
+	}
+	return settings
+}
+
+func validateFlags(cliCtx *kong.Context) {
+	var flagsValid = true
+	var messages = []string{}
+	if cliStruct.GrafanaURL == "" {
+		messages = append(messages, "error: invalid grafana URL, must not be blank")
+		flagsValid = false
+	}
+	if cliStruct.AuthToken == "" {
+		messages = append(messages, "error: invalid auth token for grafana, must not be blank")
+		flagsValid = false
+	}
+	if !flagsValid {
+		cliCtx.PrintUsage(false)
+		fmt.Println()
+		for i := 0; i < len(messages); i++ {
+			fmt.Println(messages[i])
+		}
+		os.Exit(1)
+	}
+}