refactored errorhandling one more time :-D

internal/app/app.go

@@ -1,10 +1,12 @@
 package app
 
 import (
+	"errors"
 	"flag"
 	"github.com/sirupsen/logrus"
 	"haefelfinger.net/piwigo/DirectoriesToAlbums/internal/pkg/localFileStructure"
 	"haefelfinger.net/piwigo/DirectoriesToAlbums/internal/pkg/piwigo/authentication"
+	"os"
 )
 
 var (
@@ -15,7 +17,10 @@ var (
 )
 
 func Run() {
-	context := configureContext()
+	context, err := configureContext()
+	if err != nil {
+		os.Exit(1)
+	}
 
 	loginToPiwigoAndConfigureContext(context)
 
@@ -62,9 +67,21 @@ func UploadImages() {
 	logrus.Warnln("Uploading missing images (NotImplemented)")
 }
 
-func configureContext() *AppContext {
+func configureContext() (*AppContext, error) {
 	logrus.Infoln("Preparing application context and configuration")
 
+	if *piwigoUrl == "" {
+		return nil, errors.New("missing piwigo url!")
+	}
+
+	if *piwigoUser == "" {
+		return nil, errors.New("missing piwigo user!")
+	}
+
+	if *piwigoPassword == "" {
+		return nil, errors.New("missing piwigo password!")
+	}
+
 	context := new(AppContext)
 	context.LocalRootPath = *imagesRootPath
 	context.Piwigo = new(authentication.PiwigoContext)
@@ -72,7 +89,7 @@ func configureContext() *AppContext {
 	context.Piwigo.Username = *piwigoUser
 	context.Piwigo.Password = *piwigoPassword
 
-	return context
+	return context, nil
 }
 
 func loginToPiwigoAndConfigureContext(context *AppContext) {

internal/pkg/localFileStructure/filesystemScanner.go

@@ -5,7 +5,7 @@ import (
 	"path/filepath"
 )
 
-func ScanLocalFileStructure(path string) (map[string]FilesystemNode,error){
+func ScanLocalFileStructure(path string) (map[string]FilesystemNode, error) {
 	fileMap := make(map[string]FilesystemNode)
 
 	err := filepath.Walk(path, func(p string, info os.FileInfo, err error) error {

internal/pkg/piwigo/authentication/authentication.go

@@ -2,9 +2,9 @@ package authentication
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"github.com/sirupsen/logrus"
-	"go/types"
 	"net/http"
 	"net/http/cookiejar"
 	"net/url"
@@ -43,7 +43,7 @@ func Login(context *PiwigoContext) error {
 	if loginResponse.Status != "ok" {
 		errorMessage := fmt.Sprintf("Login failed: %d - %s", loginResponse.ErrorNumber, loginResponse.Message)
 		logrus.Errorln(errorMessage)
-		return types.Error{Msg: errorMessage}
+		return errors.New(errorMessage)
 	}
 
 	logrus.Infof("Login succeeded: %s", loginResponse.Status)
@@ -106,7 +106,7 @@ func GetStatus(context *PiwigoContext) (*GetStatusResponse, error) {
 	if statusResponse.Status != "ok" {
 		errorMessage := fmt.Sprintf("Could not get session state from %s", context.Url)
 		logrus.Errorln(errorMessage)
-		return nil, types.Error{Msg: errorMessage}
+		return nil, errors.New(errorMessage)
 	}
 
 	return &statusResponse, nil