support custom hostnames

cmd/utils_test.go

@@ -249,6 +249,8 @@ func TestParsePRURL(t *testing.T) {
 		{"standard URL", "https://github.com/owner/repo/pull/42", 42, true},
 		{"with trailing slash", "https://github.com/owner/repo/pull/42/", 42, true},
 		{"with files tab", "https://github.com/owner/repo/pull/42/files", 42, true},
+		{"GHES URL", "https://ghes.example.com/owner/repo/pull/99", 99, true},
+		{"GHES URL with trailing slash", "https://ghes.example.com/owner/repo/pull/7/", 7, true},
 		{"not a PR URL", "https://github.com/owner/repo/issues/42", 0, false},
 		{"plain number", "42", 0, false},
 		{"branch name", "feat-1", 0, false},

cmd/view.go

@@ -12,6 +12,7 @@ import (
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/github/gh-stack/internal/config"
 	"github.com/github/gh-stack/internal/git"
+	ghapi "github.com/github/gh-stack/internal/github"
 	"github.com/github/gh-stack/internal/stack"
 	"github.com/github/gh-stack/internal/tui/stackview"
 	"github.com/spf13/cobra"
@@ -65,8 +66,9 @@ func runView(cfg *config.Config, opts *viewOptions) error {
 }
 
 func viewShort(cfg *config.Config, s *stack.Stack, currentBranch string) error {
-	var repoOwner, repoName string
+	var repoHost, repoOwner, repoName string
 	if repo, err := cfg.Repo(); err == nil {
+		repoHost = repo.Host
 		repoOwner = repo.Owner
 		repoName = repo.Name
 	}
@@ -81,7 +83,7 @@ func viewShort(cfg *config.Config, s *stack.Stack, currentBranch string) error {
 		}
 
 		indicator := branchStatusIndicator(cfg, s, b)
-		prSuffix := shortPRSuffix(cfg, b, repoOwner, repoName)
+		prSuffix := shortPRSuffix(cfg, b, repoHost, repoOwner, repoName)
 		if b.Branch == currentBranch {
 			cfg.Outf("» %s%s%s %s\n", cfg.ColorBold(b.Branch), indicator, prSuffix, cfg.ColorCyan("(current)"))
 		} else if merged {
@@ -187,13 +189,13 @@ func viewJSON(cfg *config.Config, s *stack.Stack, currentBranch string) error {
 	return err
 }
 
-func shortPRSuffix(cfg *config.Config, b stack.BranchRef, owner, repo string) string {
+func shortPRSuffix(cfg *config.Config, b stack.BranchRef, host, owner, repo string) string {
 	if b.PullRequest == nil || b.PullRequest.Number == 0 {
 		return ""
 	}
 	url := b.PullRequest.URL
 	if url == "" && owner != "" && repo != "" {
-		url = fmt.Sprintf("https://github.com/%s/%s/pull/%d", owner, repo, b.PullRequest.Number)
+		url = ghapi.PRURL(host, owner, repo, b.PullRequest.Number)
 	}
 	prNum := cfg.PRLink(b.PullRequest.Number, url)
 	colorFn := cfg.ColorSuccess // green for open
@@ -251,9 +253,10 @@ func viewFullTUI(cfg *config.Config, s *stack.Stack, currentBranch string) error
 func viewFullStatic(cfg *config.Config, s *stack.Stack, currentBranch string) error {
 	client, clientErr := cfg.GitHubClient()
 
-	var repoOwner, repoName string
+	var repoHost, repoOwner, repoName string
 	repo, repoErr := cfg.Repo()
 	if repoErr == nil {
+		repoHost = repo.Host
 		repoOwner = repo.Owner
 		repoName = repo.Name
 	}
@@ -285,7 +288,7 @@ func viewFullStatic(cfg *config.Config, s *stack.Stack, currentBranch string) er
 		} else if clientErr == nil && repoErr == nil {
 			pr, err := client.FindPRForBranch(b.Branch)
 			if err == nil && pr != nil {
-				prInfo = fmt.Sprintf("  https://github.com/%s/%s/pull/%d", repoOwner, repoName, pr.Number)
+				prInfo = "  " + ghapi.PRURL(repoHost, repoOwner, repoName, pr.Number)
 			}
 		}
 

internal/config/config.go

@@ -121,5 +121,5 @@ func (c *Config) GitHubClient() (ghapi.ClientOps, error) {
 	if err != nil {
 		return nil, fmt.Errorf("determining repository: %w", err)
 	}
-	return ghapi.NewClient(repo.Owner, repo.Name)
+	return ghapi.NewClient(repo.Host, repo.Owner, repo.Name)
 }

internal/github/github.go

@@ -24,30 +24,47 @@ type PullRequest struct {
 type Client struct {
 	gql   *api.GraphQLClient
 	rest  *api.RESTClient
+	host  string
 	owner string
 	repo  string
 	slug  string
 }
 
 // NewClient creates a new GitHub API client for the given repository.
-func NewClient(owner, repo string) (*Client, error) {
-	gql, err := api.DefaultGraphQLClient()
+// The host parameter specifies the GitHub hostname (e.g. "github.com" or a
+// GHES hostname like "github.mycompany.com"). If empty, it defaults to
+// "github.com".
+func NewClient(host, owner, repo string) (*Client, error) {
+	if host == "" {
+		host = "github.com"
+	}
+	opts := api.ClientOptions{Host: host}
+	gql, err := api.NewGraphQLClient(opts)
 	if err != nil {
 		return nil, fmt.Errorf("creating GraphQL client: %w", err)
 	}
-	rest, err := api.DefaultRESTClient()
+	rest, err := api.NewRESTClient(opts)
 	if err != nil {
 		return nil, fmt.Errorf("creating REST client: %w", err)
 	}
 	return &Client{
 		gql:   gql,
 		rest:  rest,
+		host:  host,
 		owner: owner,
 		repo:  repo,
 		slug:  owner + "/" + repo,
 	}, nil
 }
 
+// PRURL constructs the web URL for a pull request on the given host.
+func PRURL(host, owner, repo string, number int) string {
+	if host == "" {
+		host = "github.com"
+	}
+	return fmt.Sprintf("https://%s/%s/%s/pull/%d", host, owner, repo, number)
+}
+
 // FindPRForBranch finds an open PR by head branch name.
 func (c *Client) FindPRForBranch(branch string) (*PullRequest, error) {
 	var query struct {

internal/github/github_test.go

@@ -0,0 +1,28 @@
+package github
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPRURL(t *testing.T) {
+	tests := []struct {
+		name   string
+		host   string
+		owner  string
+		repo   string
+		number int
+		want   string
+	}{
+		{"github.com", "github.com", "owner", "repo", 42, "https://github.com/owner/repo/pull/42"},
+		{"GHES host", "ghes.example.com", "myorg", "myrepo", 99, "https://ghes.example.com/myorg/myrepo/pull/99"},
+		{"empty host defaults to github.com", "", "owner", "repo", 1, "https://github.com/owner/repo/pull/1"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := PRURL(tt.host, tt.owner, tt.repo, tt.number)
+			assert.Equal(t, tt.want, got)
+		})
+	}
+}