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

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

options/locale/locale_en-US.ini

@@ -1098,6 +1098,7 @@ 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

@@ -451,9 +451,7 @@ 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

@@ -67,7 +67,7 @@
 	{{- 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 $.LatestCommitStatus) .RequiredStatusCheckState.IsPending .RequiredStatusCheckState.IsWarning)}}yellow
 	{{- else if and .RequireSigned (not .WillSign)}}}red
 	{{- else if .Issue.PullRequest.IsChecking}}yellow
 	{{- else if .Issue.PullRequest.CanAutoMerge}}green
@@ -143,6 +143,11 @@
 						<i class="icon icon-octicon">{{svg "octicon-x" 16}}</i>
 						{{$.i18n.Tr "repo.pulls.required_status_check_failed"}}
 					</div>
+				{{else if and .EnableStatusCheck (not .RequiredStatusCheckState.IsSuccess)}}
+					<div class="item text red">
+						<i class="icon icon-octicon">{{svg "octicon-x" 16}}</i>
+						{{$.i18n.Tr "repo.pulls.required_status_check_missing"}}
+					</div>
 				{{else if and .RequireSigned (not .WillSign)}}
 					<div class="item text red">
 						<i class="icon icon-octicon">{{svg "octicon-x" 16}}</i>
@@ -153,7 +158,7 @@
 						{{$.i18n.Tr (printf "repo.signing.wont_sign.%s" .WontSignReason) }}
 					</div>
 				{{end}}
-				{{$notAllOverridableChecksOk := or .IsBlockedByApprovals .IsBlockedByRejection (and .EnableStatusCheck (not .IsRequiredStatusCheckSuccess))}}
+				{{$notAllOverridableChecksOk := or .IsBlockedByApprovals .IsBlockedByRejection (and .EnableStatusCheck (not .RequiredStatusCheckState.IsSuccess))}}
 				{{if and (or $.IsRepoAdmin (not $notAllOverridableChecksOk)) (or (not .RequireSigned) .WillSign)}}
 					{{if $notAllOverridableChecksOk}}
 						<div class="item text yellow">
@@ -337,7 +342,7 @@
 						{{svg "octicon-x" 16}}
 					{{$.i18n.Tr "repo.pulls.blocked_by_rejection"}}
 					</div>
-				{{else if and .EnableStatusCheck (not .IsRequiredStatusCheckSuccess)}}
+				{{else if and .EnableStatusCheck (not .RequiredStatusCheckState.IsSuccess)}}
 					<div class="item text red">
 						{{svg "octicon-x" 16}}
 						{{$.i18n.Tr "repo.pulls.required_status_check_failed"}}