refactor: code style / error handling improvements

cli/catalogue/generate.go

@@ -136,7 +136,7 @@ A new catalogue copy can be published to the recipes repository by passing the
 
 				isClean, err := gitPkg.IsClean(rm.Name)
 				if err != nil {
-					return
+					logrus.Fatal(err)
 				}
 
 				if !isClean {
@@ -175,6 +175,9 @@ A new catalogue copy can be published to the recipes repository by passing the
 			}
 
 			features, category, err := catalogue.GetRecipeFeaturesAndCategory(recipeMeta.Name)
+			if err != nil {
+				logrus.Fatal(err)
+			}
 
 			catl[recipeMeta.Name] = catalogue.RecipeMeta{
 				Name:          recipeMeta.Name,

pkg/catalogue/catalogue.go

@@ -374,18 +374,18 @@ func ReadReposMetadata() (RepoCatalogue, error) {
 	return reposMeta, nil
 }
 
-func GetStringInBetween(str string, start string, end string) (result string) {
+func GetStringInBetween(str, start, end string) (result string, err error) {
 	// GetStringInBetween returns empty string if no start or end string found
 	s := strings.Index(str, start)
 	if s == -1 {
-		return
+		return "", fmt.Errorf("marker string '%s' not found", start)
 	}
 	s += len(start)
 	e := strings.Index(str[s:], end)
 	if e == -1 {
-		return
+		return "", fmt.Errorf("end marker '%s' not found", end)
 	}
-	return str[s : s+e]
+	return str[s : s+e], nil
 }
 
 func GetImageMetadata(imageRowString string) (image, error) {
@@ -394,11 +394,11 @@ func GetImageMetadata(imageRowString string) (image, error) {
 	imgFields := strings.Split(imageRowString, ",")
 
 	for i, elem := range imgFields {
-			imgFields[i] = strings.TrimSpace(elem)
+		imgFields[i] = strings.TrimSpace(elem)
 	}
 
 	if len(imgFields) < 3 {
-		logrus.Warnf("Image string has incorrect format: %s", imageRowString)
+		logrus.Warnf("image string has incorrect format: %s", imageRowString)
 		return img, nil
 	}
 
@@ -407,11 +407,17 @@ func GetImageMetadata(imageRowString string) (image, error) {
 
 	imgString := imgFields[0]
 
-	img.Image = GetStringInBetween(imgString, "[", "]")
-	img.URL = GetStringInBetween(imgString, "(", ")")
+	imageName, err := GetStringInBetween(imgString, "[", "]")
+	if err != nil {
+		logrus.Fatal(err)
+	}
+	img.Image = imageName
 
-	logrus.Debugf("Image: %s", img.Image)
-	logrus.Debugf("URL: %s", img.URL)
+	imageURL, err := GetStringInBetween(imgString, "(", ")")
+	if err != nil {
+		logrus.Fatal(err)
+	}
+	img.URL = imageURL
 
 	return img, nil
 }
@@ -430,14 +436,19 @@ func GetRecipeFeaturesAndCategory(recipeName string) (features, string, error) {
 		return feat, category, err
 	}
 
-	readmeLines := strings.Split(  // Array item from lines
-		strings.ReplaceAll(  // Remove \t tabs
-			GetStringInBetween(  // Find text between delimiters
-				string(readmeFS), 
-				"<!-- metadata -->", "<!-- endmetadata -->",
-			), "\t", "",
-		), 
-	"\n")
+	readmeMetadata, err := GetStringInBetween( // Find text between delimiters
+		string(readmeFS),
+		"<!-- metadata -->", "<!-- endmetadata -->",
+	)
+	if err != nil {
+		logrus.Fatal(err)
+	}
+
+	readmeLines := strings.Split( // Array item from lines
+		strings.ReplaceAll( // Remove \t tabs
+			readmeMetadata, "\t", "",
+		),
+		"\n")
 
 	for _, val := range readmeLines {
 		if strings.Contains(val, "**Category**") {