Restore warning commit status (#27504)

Partial revert of https://github.com/go-gitea/gitea/pull/25839. This
commit status is used by a number of external integrations, so I think
we should not remove it (See
https://github.com/go-gitea/gitea/pull/25839#issuecomment-1729002077).
This is a rare case where an existing migration needed to be alterted to
avoid data loss.

---------

Co-authored-by: delvh <[e-mail]>
Co-authored-by: Giteabot <[e-mail]>

models/git/commit_status_test.go

···
 	assert.Equal(t, structs.CommitStatusPending, statuses[0].State)
 	assert.Equal(t, "https://try.gitea.io/api/v1/repos/user2/repo1/statuses/1234123412341234123412341234123412341234", statuses[0].APIURL(db.DefaultContext))
 
+	assert.Equal(t, "cov/awesomeness", statuses[1].Context)
+	assert.Equal(t, structs.CommitStatusWarning, statuses[1].State)
+	assert.Equal(t, "https://try.gitea.io/api/v1/repos/user2/repo1/statuses/1234123412341234123412341234123412341234", statuses[1].APIURL(db.DefaultContext))
+
 	assert.Equal(t, "cov/awesomeness", statuses[2].Context)
 	assert.Equal(t, structs.CommitStatusSuccess, statuses[2].State)
 	assert.Equal(t, "https://try.gitea.io/api/v1/repos/user2/repo1/statuses/1234123412341234123412341234123412341234", statuses[2].APIURL(db.DefaultContext))

models/migrations/v1_21/v266.go

···
 	if _, err := sess.Exec(`UPDATE commit_status SET state='pending' WHERE state='running'`); err != nil {
 		return err
 	}
-	if _, err := sess.Exec(`UPDATE commit_status SET state='failure' WHERE state='warning'`); err != nil {
-		return err
-	}
 
 	return sess.Commit()
 }

modules/structs/commit_status.go

···
 	CommitStatusError CommitStatusState = "error"
 	// CommitStatusFailure is for when the CommitStatus is Failure
 	CommitStatusFailure CommitStatusState = "failure"
+	// CommitStatusWarning is for when the CommitStatus is Warning
+	CommitStatusWarning CommitStatusState = "warning"
 )
 
 var commitStatusPriorities = map[CommitStatusState]int{
 	CommitStatusError:   0,
 	CommitStatusFailure: 1,
-	CommitStatusPending: 2,
-	CommitStatusSuccess: 3,
+	CommitStatusWarning: 2,
+	CommitStatusPending: 3,
+	CommitStatusSuccess: 4,
 }
 
 func (css CommitStatusState) String() string {
···
 // NoBetterThan returns true if this State is no better than the given State
 // This function only handles the states defined in CommitStatusPriorities
 func (css CommitStatusState) NoBetterThan(css2 CommitStatusState) bool {
-	// NoBetterThan only handles the 4 states above
+	// NoBetterThan only handles the 5 states above
 	if _, exist := commitStatusPriorities[css]; !exist {
 		return false
 	}
···
 func (css CommitStatusState) IsFailure() bool {
 	return css == CommitStatusFailure
 }
+
+// IsWarning represents if commit status state is warning
+func (css CommitStatusState) IsWarning() bool {
+	return css == CommitStatusWarning
+}

templates/repo/commit_status.tmpl

···
 {{if eq .State "failure"}}
 	{{svg "octicon-x" 18 "commit-status icon text red"}}
 {{end}}
+{{if eq .State "warning"}}
+	{{svg "gitea-exclamation" 18 "commit-status icon text yellow"}}
+{{end}}

templates/repo/issue/view_content/pull.tmpl

···
 	{{- else if .IsBlockedByOutdatedBranch}}red
 	{{- else if .IsBlockedByChangedProtectedFiles}}red
 	{{- else if and .EnableStatusCheck (or .RequiredStatusCheckState.IsFailure .RequiredStatusCheckState.IsError)}}red
-	{{- else if and .EnableStatusCheck (or (not $.LatestCommitStatus) .RequiredStatusCheckState.IsPending)}}yellow
+	{{- else if and .EnableStatusCheck (or (not $.LatestCommitStatus) .RequiredStatusCheckState.IsPending .RequiredStatusCheckState.IsWarning)}}yellow
 	{{- else if and .AllowMerge .RequireSigned (not .WillSign)}}red
 	{{- else if .Issue.PullRequest.IsChecking}}yellow
 	{{- else if .Issue.PullRequest.IsEmpty}}grey

tests/integration/pull_status_test.go

···
 			api.CommitStatusError,
 			api.CommitStatusFailure,
 			api.CommitStatusSuccess,
+			api.CommitStatusWarning,
 		}
 
 		statesIcons := map[api.CommitStatusState]string{
···
 			api.CommitStatusSuccess: "octicon-check",
 			api.CommitStatusError:   "gitea-exclamation",
 			api.CommitStatusFailure: "octicon-x",
+			api.CommitStatusWarning: "gitea-exclamation",
 		}
 
 		testCtx := NewAPITestContext(t, "user1", "repo1", auth_model.AccessTokenScopeWriteRepository)

tests/integration/repo_commits_test.go

···
 	doTestRepoCommitWithStatus(t, "failure", "octicon-x", "red")
 }
 
+func TestRepoCommitsWithStatusWarning(t *testing.T) {
+	doTestRepoCommitWithStatus(t, "warning", "gitea-exclamation", "yellow")
+}
+
 func TestRepoCommitsStatusParallel(t *testing.T) {
 	defer tests.PrepareTestEnv(t)()
 

web_src/js/components/DashboardRepoList.vue

···
   success: {name: 'octicon-check', color: 'green'},
   error: {name: 'gitea-exclamation', color: 'red'},
   failure: {name: 'octicon-x', color: 'red'},
+  warning: {name: 'gitea-exclamation', color: 'yellow'},
 };
 
 const sfc = {