Add commit statuses reports on pull request view (#6845)

* Add commit statuses reports on pull view

* Add some translations

* improve the UI

* fix fmt

* fix tests

* add a new test git repo to fix tests

* fix bug when headRepo or headBranch missing

* fix tests

* fix tests

* fix consistency

* fix tests

* fix tests

* change the test repo

* fix tests

* fix tests

* fix migration

* keep db size consistency

* fix translation

* change commit hash status table unique index

* remove unused table

* use char instead varchar

* make hashCommitStatusContext private

* split merge section with status check on pull view ui

* fix tests; fix arc-green theme on pull ui

3 files changed, 69 insertions, 1 deletions

diff --git a/models/migrations/migrations.go b/models/migrations/migrations.go
index e8fb42c492..7a5b0c4184 100644
--- a/models/migrations/migrations.go
+++ b/models/migrations/migrations.go
@@ -229,6 +229,8 @@ var migrations = []Migration{
 	NewMigration("add http method to webhook", addHTTPMethodToWebhook),
 	// v87 -> v88
 	NewMigration("add avatar field to repository", addAvatarFieldToRepository),
+	// v88 -> v89
+	NewMigration("add commit status context field to commit_status", addCommitStatusContext),
 }
 
 // Migrate database to current version
diff --git a/models/migrations/v87.go b/models/migrations/v87.go
index 94711ac669..c8c7011a08 100644
--- a/models/migrations/v87.go
+++ b/models/migrations/v87.go
@@ -1,4 +1,4 @@
-// Copyright 2019 Gitea. All rights reserved.
+// Copyright 2019 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.
 
diff --git a/models/migrations/v88.go b/models/migrations/v88.go
new file mode 100644
index 0000000000..fef425db0a
--- /dev/null
+++ b/models/migrations/v88.go
@@ -0,0 +1,66 @@
+// Copyright 2019 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 migrations
+
+import (
+	"crypto/sha1"
+	"fmt"
+
+	"github.com/go-xorm/xorm"
+)
+
+func hashContext(context string) string {
+	return fmt.Sprintf("%x", sha1.Sum([]byte(context)))
+}
+
+func addCommitStatusContext(x *xorm.Engine) error {
+	type CommitStatus struct {
+		ID          int64  `xorm:"pk autoincr"`
+		ContextHash string `xorm:"char(40) index"`
+		Context     string `xorm:"TEXT"`
+	}
+
+	if err := x.Sync2(new(CommitStatus)); err != nil {
+		return err
+	}
+
+	sess := x.NewSession()
+	defer sess.Close()
+
+	var start = 0
+	for {
+		var statuses = make([]*CommitStatus, 0, 100)
+		err := sess.OrderBy("id").Limit(100, start).Find(&statuses)
+		if err != nil {
+			return err
+		}
+		if len(statuses) == 0 {
+			break
+		}
+
+		if err = sess.Begin(); err != nil {
+			return err
+		}
+
+		for _, status := range statuses {
+			status.ContextHash = hashContext(status.Context)
+			if _, err := sess.ID(status.ID).Cols("context_hash").Update(status); err != nil {
+				return err
+			}
+		}
+
+		if err := sess.Commit(); err != nil {
+			return err
+		}
+
+		if len(statuses) < 100 {
+			break
+		}
+
+		start += len(statuses)
+	}
+
+	return nil
+}