Fix ref links in issue overviews for tags (#8742)

* Properly generate ref URLs

Tags used to not generate correct URLs (src/branch/tags/1.0.0 instead of
src/tags/1.0.0).

Also cleans up some code around it with the created helper functions.

* Fix formatting and create migration

* Add copyright head to utils_test

* Use a raw query for the ref migration

* Remove semicolon

* Quote column and table names in migration SQL

* Change || to CONCAT, since MSSQL does not support ||

* Make migration engine aware

* Add missing import

* Move ref EndName and URL to the issue service

* Fix tests

* Add test for commit refs

* Update issue.go

* Use the right command for building JavaScript bundles

* Prepare for merge

* Check for refs/* before prepending in migration

* Update services/issue/issue_test.go

* Update modules/git/utils_test.go

Co-authored-by: techknowlogick <techknowlogick@gitea.io>
Co-authored-by: techknowlogick <matti@mdranta.net>

2 files changed, 46 insertions, 0 deletions

diff --git a/services/issue/issue.go b/services/issue/issue.go
index aa06ba4097..64d69119b7 100644
--- a/services/issue/issue.go
+++ b/services/issue/issue.go
@@ -6,7 +6,9 @@ package issue
 
 import (
 	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/notification"
+	"code.gitea.io/gitea/modules/util"
 )
 
 // NewIssue creates new issue with labels for repository.
@@ -128,3 +130,17 @@ func AddAssigneeIfNotAssigned(issue *models.Issue, doer *models.User, assigneeID
 
 	return nil
 }
+
+// GetRefEndNamesAndURLs retrieves the ref end names (e.g. refs/heads/branch-name -> branch-name)
+// and their respective URLs.
+func GetRefEndNamesAndURLs(issues []*models.Issue, repoLink string) (map[int64]string, map[int64]string) {
+	var issueRefEndNames = make(map[int64]string, len(issues))
+	var issueRefURLs = make(map[int64]string, len(issues))
+	for _, issue := range issues {
+		if issue.Ref != "" {
+			issueRefEndNames[issue.ID] = git.RefEndName(issue.Ref)
+			issueRefURLs[issue.ID] = git.RefURL(repoLink, util.PathEscapeSegments(issue.Ref))
+		}
+	}
+	return issueRefEndNames, issueRefURLs
+}
diff --git a/services/issue/issue_test.go b/services/issue/issue_test.go
new file mode 100644
index 0000000000..caae773616
--- /dev/null
+++ b/services/issue/issue_test.go
@@ -0,0 +1,30 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package issue
+
+import (
+	"testing"
+
+	"code.gitea.io/gitea/models"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetRefEndNamesAndURLs(t *testing.T) {
+	issues := []*models.Issue{
+		{ID: 1, Ref: "refs/heads/branch1"},
+		{ID: 2, Ref: "refs/tags/tag1"},
+		{ID: 3, Ref: "c0ffee"},
+	}
+	repoLink := "/foo/bar"
+
+	endNames, urls := GetRefEndNamesAndURLs(issues, repoLink)
+	assert.EqualValues(t, map[int64]string{1: "branch1", 2: "tag1", 3: "c0ffee"}, endNames)
+	assert.EqualValues(t, map[int64]string{
+		1: repoLink + "/src/branch/branch1",
+		2: repoLink + "/src/tag/tag1",
+		3: repoLink + "/src/commit/c0ffee",
+	}, urls)
+}