Remove StateReason feature detection for issue close

The stateReason field was added in GHES ~3.4, which is far older than
the earliest supported GHES version (3.14). The feature detection and
conditional inclusion of stateReason is therefore unnecessary.

This removes:
- StateReason field from IssueFeatures struct
- GHES introspection query in IssueFeatures() (only ActorIsAssignable
  remains, which is always false on GHES)
- Conditional stateReason field inclusion in issue list
- Feature detection guard in issue close
- Feature detection guard in FindIssueOrPR

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

internal/featuredetection/feature_detection.go

@@ -23,12 +23,10 @@ type Detector interface {
 }
 
 type IssueFeatures struct {
-	StateReason       bool
 	ActorIsAssignable bool
 }
 
 var allIssueFeatures = IssueFeatures{
-	StateReason:       true,
 	ActorIsAssignable: true,
 }
 
@@ -137,32 +135,9 @@ func (d *detector) IssueFeatures() (IssueFeatures, error) {
 		return allIssueFeatures, nil
 	}
 
-	features := IssueFeatures{
-		StateReason:       false,
+	return IssueFeatures{
 		ActorIsAssignable: false, // replaceActorsForAssignable GraphQL mutation unavailable on GHES
-	}
-
-	var featureDetection struct {
-		Issue struct {
-			Fields []struct {
-				Name string
-			} `graphql:"fields(includeDeprecated: true)"`
-		} `graphql:"Issue: __type(name: \"Issue\")"`
-	}
-
-	gql := api.NewClientFromHTTP(d.httpClient)
-	err := gql.Query(d.host, "Issue_fields", &featureDetection, nil)
-	if err != nil {
-		return features, err
-	}
-
-	for _, field := range featureDetection.Issue.Fields {
-		if field.Name == "stateReason" {
-			features.StateReason = true
-		}
-	}
-
-	return features, nil
+	}, nil
 }
 
 func (d *detector) PullRequestFeatures() (PullRequestFeatures, error) {

internal/featuredetection/feature_detection_test.go

@@ -23,7 +23,6 @@ func TestIssueFeatures(t *testing.T) {
 			name:     "github.com",
 			hostname: "github.com",
 			wantFeatures: IssueFeatures{
-				StateReason:       true,
 				ActorIsAssignable: true,
 			},
 			wantErr: false,
@@ -32,38 +31,18 @@ func TestIssueFeatures(t *testing.T) {
 			name:     "ghec data residency (ghe.com)",
 			hostname: "stampname.ghe.com",
 			wantFeatures: IssueFeatures{
-				StateReason:       true,
 				ActorIsAssignable: true,
 			},
 			wantErr: false,
 		},
 		{
-			name:     "GHE empty response",
+			name:     "GHE",
 			hostname: "git.my.org",
-			queryResponse: map[string]string{
-				`query Issue_fields\b`: `{"data": {}}`,
-			},
 			wantFeatures: IssueFeatures{
-				StateReason:       false,
 				ActorIsAssignable: false,
 			},
 			wantErr: false,
 		},
-		{
-			name:     "GHE has state reason field",
-			hostname: "git.my.org",
-			queryResponse: map[string]string{
-				`query Issue_fields\b`: heredoc.Doc(`
-					{ "data": { "Issue": { "fields": [
-						{"name": "stateReason"}
-					] } } }
-				`),
-			},
-			wantFeatures: IssueFeatures{
-				StateReason: true,
-			},
-			wantErr: false,
-		},
 	}
 
 	for _, tt := range tests {

pkg/cmd/issue/close/close.go

@@ -3,11 +3,9 @@ package close
 import (
 	"fmt"
 	"net/http"
-	"time"
 
 	"github.com/MakeNowJust/heredoc"
 	"github.com/cli/cli/v2/api"
-	fd "github.com/cli/cli/v2/internal/featuredetection"
 	"github.com/cli/cli/v2/internal/ghrepo"
 	"github.com/cli/cli/v2/pkg/cmd/issue/shared"
 	prShared "github.com/cli/cli/v2/pkg/cmd/pr/shared"
@@ -26,8 +24,6 @@ type CloseOptions struct {
 	Comment     string
 	Reason      string
 	DuplicateOf string
-
-	Detector fd.Detector
 }
 
 func NewCmdClose(f *cmdutil.Factory, runF func(*CloseOptions) error) *cobra.Command {
@@ -165,7 +161,7 @@ func closeRun(opts *CloseOptions) error {
 		}
 	}
 
-	err = apiClose(httpClient, baseRepo, issue, opts.Detector, closeReason, duplicateIssueID)
+	err = apiClose(httpClient, baseRepo, issue, closeReason, duplicateIssueID)
 	if err != nil {
 		return err
 	}
@@ -175,30 +171,11 @@ func closeRun(opts *CloseOptions) error {
 	return nil
 }
 
-func apiClose(httpClient *http.Client, repo ghrepo.Interface, issue *api.Issue, detector fd.Detector, reason string, duplicateIssueID string) error {
+func apiClose(httpClient *http.Client, repo ghrepo.Interface, issue *api.Issue, reason string, duplicateIssueID string) error {
 	if issue.IsPullRequest() {
 		return api.PullRequestClose(httpClient, repo, issue.ID)
 	}
 
-	if reason != "" || duplicateIssueID != "" {
-		if detector == nil {
-			cachedClient := api.NewCachedHTTPClient(httpClient, time.Hour*24)
-			detector = fd.NewDetector(cachedClient, repo.RepoHost())
-		}
-		features, err := detector.IssueFeatures()
-		if err != nil {
-			return err
-		}
-		// TODO stateReasonCleanup
-		if !features.StateReason {
-			// If StateReason is not supported silently close issue without setting StateReason.
-			if duplicateIssueID != "" {
-				return fmt.Errorf("closing as duplicate is not supported on %s", repo.RepoHost())
-			}
-			reason = ""
-		}
-	}
-
 	switch reason {
 	case "":
 		// If no reason is specified do not set it.

pkg/cmd/issue/close/close_test.go

@@ -5,7 +5,6 @@ import (
 	"net/http"
 	"testing"
 
-	fd "github.com/cli/cli/v2/internal/featuredetection"
 	"github.com/cli/cli/v2/internal/ghrepo"
 	"github.com/cli/cli/v2/pkg/cmd/issue/argparsetest"
 	"github.com/cli/cli/v2/pkg/cmdutil"
@@ -185,7 +184,6 @@ func TestCloseRun(t *testing.T) {
 			opts: &CloseOptions{
 				IssueNumber: 13,
 				Reason:      "not planned",
-				Detector:    &fd.EnabledDetectorMock{},
 			},
 			httpStubs: func(reg *httpmock.Registry) {
 				reg.Register(
@@ -213,7 +211,6 @@ func TestCloseRun(t *testing.T) {
 			opts: &CloseOptions{
 				IssueNumber: 13,
 				Reason:      "duplicate",
-				Detector:    &fd.EnabledDetectorMock{},
 			},
 			httpStubs: func(reg *httpmock.Registry) {
 				reg.Register(
@@ -241,7 +238,6 @@ func TestCloseRun(t *testing.T) {
 			opts: &CloseOptions{
 				IssueNumber: 13,
 				DuplicateOf: "99",
-				Detector:    &fd.EnabledDetectorMock{},
 			},
 			httpStubs: func(reg *httpmock.Registry) {
 				reg.Register(
@@ -338,33 +334,6 @@ func TestCloseRun(t *testing.T) {
 			wantErr: true,
 			errMsg:  "invalid value for `--duplicate-of`: invalid issue format: \"not-an-issue\"",
 		},
-		{
-			name: "close issue with reason when reason is not supported",
-			opts: &CloseOptions{
-				IssueNumber: 13,
-				Reason:      "not planned",
-				Detector:    &fd.DisabledDetectorMock{},
-			},
-			httpStubs: func(reg *httpmock.Registry) {
-				reg.Register(
-					httpmock.GraphQL(`query IssueByNumber\b`),
-					httpmock.StringResponse(`
-            { "data": { "repository": {
-              "hasIssuesEnabled": true,
-              "issue": { "id": "THE-ID", "number": 13, "title": "The title of the issue"}
-            } } }`),
-				)
-				reg.Register(
-					httpmock.GraphQL(`mutation IssueClose\b`),
-					httpmock.GraphQLMutation(`{"id": "THE-ID"}`,
-						func(inputs map[string]interface{}) {
-							assert.Equal(t, 1, len(inputs))
-							assert.Equal(t, "THE-ID", inputs["issueId"])
-						}),
-				)
-			},
-			wantStderr: "✓ Closed issue OWNER/REPO#13 (The title of the issue)\n",
-		},
 		{
 			name: "issue already closed",
 			opts: &CloseOptions{

pkg/cmd/issue/list/list.go

@@ -147,15 +147,7 @@ func listRun(opts *ListOptions) error {
 		cachedClient := api.NewCachedHTTPClient(httpClient, time.Hour*24)
 		opts.Detector = fd.NewDetector(cachedClient, baseRepo.RepoHost())
 	}
-	features, err := opts.Detector.IssueFeatures()
-	if err != nil {
-		return err
-	}
-	fields := defaultFields
-	// TODO stateReasonCleanup
-	if features.StateReason {
-		fields = append(defaultFields, "stateReason")
-	}
+	fields := append(defaultFields, "stateReason")
 
 	filterOptions := prShared.FilterOptions{
 		Entity:    "issue",

pkg/cmd/issue/shared/lookup.go

@@ -8,10 +8,8 @@ import (
 	"regexp"
 	"strconv"
 	"strings"
-	"time"
 
 	"github.com/cli/cli/v2/api"
-	fd "github.com/cli/cli/v2/internal/featuredetection"
 	"github.com/cli/cli/v2/internal/ghrepo"
 	o "github.com/cli/cli/v2/pkg/option"
 	"github.com/cli/cli/v2/pkg/set"
@@ -138,18 +136,6 @@ func FindIssuesOrPRs(httpClient *http.Client, repo ghrepo.Interface, issueNumber
 func FindIssueOrPR(httpClient *http.Client, repo ghrepo.Interface, number int, fields []string) (*api.Issue, error) {
 	fieldSet := set.NewStringSet()
 	fieldSet.AddValues(fields)
-	if fieldSet.Contains("stateReason") {
-		cachedClient := api.NewCachedHTTPClient(httpClient, time.Hour*24)
-		detector := fd.NewDetector(cachedClient, repo.RepoHost())
-		features, err := detector.IssueFeatures()
-		if err != nil {
-			return nil, err
-		}
-		// TODO stateReasonCleanup
-		if !features.StateReason {
-			fieldSet.Remove("stateReason")
-		}
-	}
 
 	var getProjectItems bool
 	if fieldSet.Contains("projectItems") {