From e1ed2a76b16cb1acba39dd841e2dd1425e4daf09 Mon Sep 17 00:00:00 2001
From: 6543 <6543@obermui.de>
Date: Sun, 11 Oct 2020 22:56:51 +0200
Subject: [PATCH] Migration Tool: Backport GitLab Label Color Normalizer
 (#12793) (#13100)

fix bug mentioned in #13085

backport of #12793
---
 modules/migrations/gitlab.go | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/modules/migrations/gitlab.go b/modules/migrations/gitlab.go
index cca036aa2..09e1a77d3 100644
--- a/modules/migrations/gitlab.go
+++ b/modules/migrations/gitlab.go
@@ -241,6 +241,19 @@ func (g *GitlabDownloader) GetMilestones() ([]*base.Milestone, error) {
 	return milestones, nil
 }
 
+func (g *GitlabDownloader) normalizeColor(val string) string {
+	val = strings.TrimLeft(val, "#")
+	val = strings.ToLower(val)
+	if len(val) == 3 {
+		c := []rune(val)
+		val = fmt.Sprintf("%c%c%c%c%c%c", c[0], c[0], c[1], c[1], c[2], c[2])
+	}
+	if len(val) != 6 {
+		return ""
+	}
+	return val
+}
+
 // GetLabels returns labels
 func (g *GitlabDownloader) GetLabels() ([]*base.Label, error) {
 	if g == nil {
@@ -259,7 +272,7 @@ func (g *GitlabDownloader) GetLabels() ([]*base.Label, error) {
 		for _, label := range ls {
 			baseLabel := &base.Label{
 				Name:        label.Name,
-				Color:       strings.TrimLeft(label.Color, "#)"),
+				Color:       g.normalizeColor(label.Color),
 				Description: label.Description,
 			}
 			labels = append(labels, baseLabel)