From 7b06d1c161825e2dff7faae1a5dd1cf5e9b5f400 Mon Sep 17 00:00:00 2001
From: knoflook <knoflook@disroot.org>
Date: Sun, 3 Oct 2021 10:09:22 +0200
Subject: [PATCH] fix: Tag.UpgradeElement() fails when missing minor or patch

---
 tagcmp.go | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/tagcmp.go b/tagcmp.go
index ae40544..bce89e0 100644
--- a/tagcmp.go
+++ b/tagcmp.go
@@ -177,31 +177,31 @@ func (curTag Tag) UpgradeElement(newTag Tag) (Tag, error) {
 	if err != nil {
 		return Tag{}, err
 	}
-	curMinor, err := strconv.Atoi(curTag.Minor)
-	if err != nil {
-		return Tag{}, err
-	}
-	curPatch, err := strconv.Atoi(curTag.Patch)
-	if err != nil {
-		return Tag{}, err
-	}
 	newMajor, err := strconv.Atoi(newTag.Major)
 	if err != nil {
 		return Tag{}, err
 	}
-	newMinor, err := strconv.Atoi(newTag.Minor)
-	if err != nil {
-		return Tag{}, err
-	}
-	newPatch, err := strconv.Atoi(newTag.Patch)
-	if err != nil {
-		return Tag{}, err
-	}
 	diff.Major = strconv.Itoa(newMajor - curMajor)
 	if !curTag.MissingMinor {
+		curMinor, err := strconv.Atoi(curTag.Minor)
+		if err != nil {
+			return Tag{}, err
+		}
+		newMinor, err := strconv.Atoi(newTag.Minor)
+		if err != nil {
+			return Tag{}, err
+		}
 		diff.Minor = strconv.Itoa(newMinor - curMinor)
 	}
 	if !curTag.MissingPatch {
+		curPatch, err := strconv.Atoi(curTag.Patch)
+		if err != nil {
+			return Tag{}, err
+		}
+		newPatch, err := strconv.Atoi(newTag.Patch)
+		if err != nil {
+			return Tag{}, err
+		}
 		diff.Patch = strconv.Itoa(newPatch - curPatch)
 	}