Fix merge dialog on protected branch with missing required statuses (#11074) (#11084)

It is possible for misconfigured protected branches to have required status checks that are not in any of the current statuses: Pending, Success, Error, Failure, or Warning - presumably because the CI has not contacted us as yet.

Fix #10636 by adding case: missing StatusChecks when these are missing

Author: 6543

options/locale/locale_en-US.ini

@@ -1062,6 +1062,7 @@ pulls.data_broken = This pull request is broken due to missing fork information.
 pulls.files_conflicted = This pull request has changes conflicting with the target branch.
 pulls.is_checking = "Merge conflict checking is in progress. Try again in few moments."
 pulls.required_status_check_failed = Some required checks were not successful.
+pulls.required_status_check_missing = Some required checks are missing.
 pulls.required_status_check_administrator = As an administrator, you may still merge this pull request.
 pulls.blocked_by_approvals = "This Pull Request doesn't have enough approvals yet. %d of %d approvals granted."
 pulls.blocked_by_rejection = "This Pull Request has changes requested by an official reviewer."

routers/repo/pull.go

@@ -413,9 +413,7 @@ func PrepareViewPullInfo(ctx *context.Context, issue *models.Issue) *git.Compare
 			}
 			return false
 		}
-		state := pull_service.MergeRequiredContextsCommitStatus(commitStatuses, pull.ProtectedBranch.StatusCheckContexts)
-		ctx.Data["RequiredStatusCheckState"] = state
-		ctx.Data["IsRequiredStatusCheckSuccess"] = state.IsSuccess()
+		ctx.Data["RequiredStatusCheckState"] = pull_service.MergeRequiredContextsCommitStatus(commitStatuses, pull.ProtectedBranch.StatusCheckContexts)
 	}
 
 	ctx.Data["HeadBranchMovedOn"] = headBranchSha != sha

templates/repo/issue/view_content/pull.tmpl

@@ -43,7 +43,7 @@
 	{{else if .IsBlockedByApprovals}}red
 	{{else if .IsBlockedByRejection}}red
 	{{else if and .EnableStatusCheck (or .RequiredStatusCheckState.IsFailure .RequiredStatusCheckState.IsError)}}red
-	{{else if and .EnableStatusCheck (or .RequiredStatusCheckState.IsPending .RequiredStatusCheckState.IsWarning)}}yellow
+	{{else if and .EnableStatusCheck (or (not $.LatestCommitStatus) .RequiredStatusCheckState.IsPending .RequiredStatusCheckState.IsWarning)}}yellow
 	{{else if .Issue.PullRequest.IsChecking}}yellow
 	{{else if .Issue.PullRequest.CanAutoMerge}}green
 	{{else}}red{{end}}"><span class="mega-octicon octicon-git-merge"></span></a>
@@ -112,7 +112,7 @@
 					<span class="octicon octicon-sync"></span>
 					{{$.i18n.Tr "repo.pulls.is_checking"}}
 				</div>
-			{{else if and (not .Issue.PullRequest.CanAutoMerge) .EnableStatusCheck (not .IsRequiredStatusCheckSuccess)}}
+			{{else if and (not .Issue.PullRequest.CanAutoMerge) .EnableStatusCheck (not .RequiredStatusCheckState.IsSuccess)}}
 				<div class="item text red">
 					<span class="octicon octicon-x"></span>
 					{{$.i18n.Tr "repo.pulls.required_status_check_failed"}}
@@ -123,9 +123,14 @@
 					<span class="octicon octicon-x"></span>
 					{{$.i18n.Tr "repo.pulls.required_status_check_failed"}}
 				</div>
+				{{else if and .EnableStatusCheck (not .RequiredStatusCheckState.IsSuccess)}}
+				<div class="item text red">
+					<span class="octicon octicon-x"></span>
+					{{$.i18n.Tr "repo.pulls.required_status_check_missing"}}
+				</div>
 				{{end}}
-				{{if or $.IsRepoAdmin (not .EnableStatusCheck) .IsRequiredStatusCheckSuccess}}
-					{{if and $.IsRepoAdmin .EnableStatusCheck (not .IsRequiredStatusCheckSuccess)}}
+				{{if or $.IsRepoAdmin (not .EnableStatusCheck) .RequiredStatusCheckState.IsSuccess}}
+					{{if and $.IsRepoAdmin .EnableStatusCheck (not .RequiredStatusCheckState.IsSuccess)}}
 						<div class="item text yellow">
 							<span class="octicon octicon-primitive-dot"></span>
 							{{$.i18n.Tr "repo.pulls.required_status_check_administrator"}}