return error instead of handling it inside getLatestVersion

cli/recipe/sync.go

@@ -1,6 +1,7 @@
 package recipe
 
 import (
+	"errors"
 	"fmt"
 	"strconv"
 	"strings"
@@ -19,6 +20,9 @@ import (
 	"github.com/spf13/cobra"
 )
 
+// Errors
+var emptyVersionsInCatalogue = errors.New("Catalogue versions list is empty (unexpectedly!)")
+
 // translators: `abra recipe reset` aliases. use a comma separated list of
 // aliases with no spaces in between
 var recipeSyncAliases = i18n.G("s")
@@ -127,7 +131,10 @@ likely to change.
 			}
 
 			latestRelease := tags[len(tags)-1]
-			latestRecipeVersion := getLatestVersion(recipe, catl)
+			latestRecipeVersion, err := getLatestVersion(recipe, catl)
+			if err != nil && err != emptyVersionsInCatalogue {
+				log.Fatal(err)
+			}
 			changesTable.Headers(i18n.G("SERVICE"), latestRelease, i18n.G("PROPOSED CHANGES"))
 
 			allRecipeVersions := catl[recipe.Name].Versions
@@ -294,14 +301,13 @@ func init() {
 	)
 }
 
-func getLatestVersion(recipe recipePkg.Recipe, catl recipePkg.RecipeCatalogue) string {
+func getLatestVersion(recipe recipePkg.Recipe, catl recipePkg.RecipeCatalogue) (string, error) {
 	versions, err := recipePkg.GetRecipeCatalogueVersions(recipe.Name, catl)
 	if err != nil {
-		log.Fatal(err)
+		return "", err
 	}
-	latestRecipeVersion := "0.0.0"
 	if len(versions) > 0 {
-		latestRecipeVersion = versions[len(versions)-1]
+		return versions[len(versions)-1], nil
 	}
-	return latestRecipeVersion
+	return "", emptyVersionsInCatalogue
 }

cli/recipe/sync_test.go

@@ -7,11 +7,11 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func TestGetLatestVersionReturnsDefault(t *testing.T) {
+func TestGetLatestVersionReturnsErrorWhenVersionsIsEmpty(t *testing.T) {
 	recipe := recipePkg.Recipe{}
 	catalogue := recipePkg.RecipeCatalogue{}
-	version := getLatestVersion(recipe, catalogue)
-	assert.Equal(t, version, "0.0.0")
+	_, err := getLatestVersion(recipe, catalogue)
+	assert.Equal(t, err, emptyVersionsInCatalogue)
 }
 
 func TestGetLatestVersionReturnsLastVersion(t *testing.T) {
@@ -28,6 +28,6 @@ func TestGetLatestVersionReturnsLastVersion(t *testing.T) {
 	catalogue["test"] = recipePkg.RecipeMeta{
 		Versions: versions,
 	}
-	version := getLatestVersion(recipe, catalogue)
+	version, _ := getLatestVersion(recipe, catalogue)
 	assert.Equal(t, version, "0.0.3")
 }