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

modules/repofiles/commit_status.go

@@ -0,0 +1,39 @@
+// 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 repofiles
+
+import (
+	"fmt"
+
+	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/git"
+)
+
+// CreateCommitStatus creates a new CommitStatus given a bunch of parameters
+// NOTE: All text-values will be trimmed from whitespaces.
+// Requires: Repo, Creator, SHA
+func CreateCommitStatus(repo *models.Repository, creator *models.User, sha string, status *models.CommitStatus) error {
+	repoPath := repo.RepoPath()
+
+	// confirm that commit is exist
+	gitRepo, err := git.OpenRepository(repoPath)
+	if err != nil {
+		return fmt.Errorf("OpenRepository[%s]: %v", repoPath, err)
+	}
+	if _, err := gitRepo.GetCommit(sha); err != nil {
+		return fmt.Errorf("GetCommit[%s]: %v", sha, err)
+	}
+
+	if err := models.NewCommitStatus(models.NewCommitStatusOptions{
+		Repo:         repo,
+		Creator:      creator,
+		SHA:          sha,
+		CommitStatus: status,
+	}); err != nil {
+		return fmt.Errorf("NewCommitStatus[repo_id: %d, user_id: %d, sha: %s]: %v", repo.ID, creator.ID, sha, err)
+	}
+
+	return nil
+}