Fix signing.wont_sign.%!s(<nil>) if Require Signing commits but not signed in (#12581)

signing.wont_sign.%!s(<nil>) will be displayed if the repository needs signed
commits but the user is not logged in.

This is displayed because of complicated logic in the the template repo/issue/view_content/pull.tmpl
and a shortcut in the code of routers/repo/issue.go

This PR adds a default value of notsignedin if users are not signed in, which
although our templates will not show will prevent custom templates from showing
the above.

It also fixes the template to avoid showing signing errors if the user is not
authorized to sign.

Replaces #12564
Close #12564

Signed-off-by: Andrew Thornton <art27@cantab.net>

options/locale/locale_en-US.ini

@@ -1276,6 +1276,7 @@ signing.wont_sign.basesigned = The merge will not be signed as the base commit i
 signing.wont_sign.headsigned = The merge will not be signed as the head commit is not signed
 signing.wont_sign.commitssigned = The merge will not be signed as all the associated commits are not signed
 signing.wont_sign.approved = The merge will not be signed as the PR is not approved
+signing.wont_sign.not_signed_in = You are not signed in
 
 ext_wiki = Ext. Wiki
 ext_wiki.desc = Link to an external wiki.

routers/repo/issue.go

@@ -1212,6 +1212,8 @@ func ViewIssue(ctx *context.Context) {
 					log.Error("Error whilst checking if could sign pr %d in repo %s. Error: %v", pull.ID, pull.BaseRepo.FullName(), err)
 				}
 			}
+		} else {
+			ctx.Data["WontSignReason"] = "not_signed_in"
 		}
 		ctx.Data["IsPullBranchDeletable"] = canDelete &&
 			pull.HeadRepo != nil &&

templates/repo/issue/view_content/pull.tmpl

@@ -73,7 +73,7 @@
 	{{- else if .IsBlockedByOutdatedBranch}}red
 	{{- else if and .EnableStatusCheck (or .RequiredStatusCheckState.IsFailure .RequiredStatusCheckState.IsError)}}red
 	{{- else if and .EnableStatusCheck (or (not $.LatestCommitStatus) .RequiredStatusCheckState.IsPending .RequiredStatusCheckState.IsWarning)}}yellow
-	{{- else if and .RequireSigned (not .WillSign)}}red
+	{{- else if and .AllowMerge .RequireSigned (not .WillSign)}}red
 	{{- else if .Issue.PullRequest.IsChecking}}yellow
 	{{- else if .Issue.PullRequest.CanAutoMerge}}green
 	{{- else}}red{{end}}">{{svg "octicon-git-merge" 32}}</a>
@@ -159,7 +159,7 @@
 						<i class="icon icon-octicon">{{svg "octicon-x" 16}}</i>
 						{{$.i18n.Tr "repo.pulls.required_status_check_missing"}}
 					</div>
-				{{else if and .RequireSigned (not .WillSign)}}
+				{{else if and .AllowMerge .RequireSigned (not .WillSign)}}
 					<div class="item text red">
 						<i class="icon icon-octicon">{{svg "octicon-x" 16}}</i>
 						{{$.i18n.Tr "repo.pulls.require_signed_wont_sign"}}
@@ -170,7 +170,7 @@
 					</div>
 				{{end}}
 				{{$notAllOverridableChecksOk := or .IsBlockedByApprovals .IsBlockedByRejection .IsBlockedByOutdatedBranch (and .EnableStatusCheck (not .RequiredStatusCheckState.IsSuccess))}}
-				{{if and (or $.IsRepoAdmin (not $notAllOverridableChecksOk)) (or (not .RequireSigned) .WillSign)}}
+				{{if and (or $.IsRepoAdmin (not $notAllOverridableChecksOk)) (or (not .AllowMerge) (not .RequireSigned) .WillSign)}}
 					{{if $notAllOverridableChecksOk}}
 						<div class="item text yellow">
 							<i class="icon icon-octicon">{{svg "octicon-dot-fill" 16}}</i>
@@ -216,7 +216,7 @@
 					</div>
 				{{end}}
 
-				{{if and (or $.IsRepoAdmin (not $notAllOverridableChecksOk)) (or (not .RequireSigned) .WillSign)}}
+				{{if and (or $.IsRepoAdmin (not $notAllOverridableChecksOk)) (or (not .AllowMerge) (not .RequireSigned) .WillSign)}}
 					{{if .AllowMerge}}
 						{{$prUnit := .Repository.MustGetUnit $.UnitTypePullRequests}}
 						{{$approvers := .Issue.PullRequest.GetApprovers}}