Replace duplicated IsEnterprise and IsTenancy functions in api pkg with auth pkg

pkg/api/graphql_client.go

@@ -10,6 +10,7 @@ import (
 	"net/http"
 	"strings"
 
+	"github.com/cli/go-gh/v2/pkg/auth"
 	graphql "github.com/cli/shurcooL-graphql"
 )
 
@@ -171,8 +172,8 @@ func graphQLEndpoint(host string) string {
 	if isGarage(host) {
 		return fmt.Sprintf("https://%s/api/graphql", host)
 	}
-	host = normalizeHostname(host)
-	if isEnterprise(host) {
+	host = auth.NormalizeHostname(host)
+	if auth.IsEnterprise(host) {
 		return fmt.Sprintf("https://%s/api/graphql", host)
 	}
 	if strings.EqualFold(host, localhost) {

pkg/api/http_client.go

@@ -134,36 +134,6 @@ func isGarage(host string) bool {
 	return strings.EqualFold(host, "garage.github.com")
 }
 
-func isEnterprise(host string) bool {
-	return host != github && host != localhost && !isTenancy(host)
-}
-
-// tenancyHost is the domain name of a tenancy GitHub instance.
-const tenancyHost = "ghe.com"
-
-func isTenancy(host string) bool {
-	return strings.HasSuffix(host, "."+tenancyHost)
-}
-
-func normalizeHostname(hostname string) string {
-	hostname = strings.ToLower(hostname)
-	if strings.HasSuffix(hostname, "."+github) {
-		return github
-	}
-	if strings.HasSuffix(hostname, "."+localhost) {
-		return localhost
-	}
-	// This has been copied over from the cli/cli NormalizeHostname function
-	// to ensure compatible behaviour but we don't fully understand when or
-	// why it would be useful here. We can't see what harm will come of
-	// duplicating the logic.
-	if before, found := strings.CutSuffix(hostname, "."+tenancyHost); found {
-		idx := strings.LastIndex(before, ".")
-		return fmt.Sprintf("%s.%s", before[idx+1:], tenancyHost)
-	}
-	return hostname
-}
-
 type headerRoundTripper struct {
 	headers map[string]string
 	host    string

pkg/api/http_client_test.go

@@ -157,73 +157,6 @@ func TestNewHTTPClient(t *testing.T) {
 	}
 }
 
-func TestIsEnterprise(t *testing.T) {
-	tests := []struct {
-		name    string
-		host    string
-		wantOut bool
-	}{
-		{
-			name:    "github",
-			host:    "github.com",
-			wantOut: false,
-		},
-		{
-			name:    "localhost",
-			host:    "github.localhost",
-			wantOut: false,
-		},
-		{
-			name:    "enterprise",
-			host:    "mygithub.com",
-			wantOut: true,
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			out := isEnterprise(tt.host)
-			assert.Equal(t, tt.wantOut, out)
-		})
-	}
-}
-
-func TestNormalizeHostname(t *testing.T) {
-	tests := []struct {
-		name     string
-		host     string
-		wantHost string
-	}{
-		{
-			name:     "github domain",
-			host:     "test.github.com",
-			wantHost: "github.com",
-		},
-		{
-			name:     "capitalized",
-			host:     "GitHub.com",
-			wantHost: "github.com",
-		},
-		{
-			name:     "localhost domain",
-			host:     "test.github.localhost",
-			wantHost: "github.localhost",
-		},
-		{
-			name:     "enterprise domain",
-			host:     "mygithub.com",
-			wantHost: "mygithub.com",
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			normalized := normalizeHostname(tt.host)
-			assert.Equal(t, tt.wantHost, normalized)
-		})
-	}
-}
-
 type tripper struct {
 	roundTrip func(*http.Request) (*http.Response, error)
 }

pkg/api/rest_client.go

@@ -7,6 +7,8 @@ import (
 	"io"
 	"net/http"
 	"strings"
+
+	"github.com/cli/go-gh/v2/pkg/auth"
 )
 
 // RESTClient wraps methods for the different types of
@@ -159,8 +161,8 @@ func restPrefix(hostname string) string {
 	if isGarage(hostname) {
 		return fmt.Sprintf("https://%s/api/v3/", hostname)
 	}
-	hostname = normalizeHostname(hostname)
-	if isEnterprise(hostname) {
+	hostname = auth.NormalizeHostname(hostname)
+	if auth.IsEnterprise(hostname) {
 		return fmt.Sprintf("https://%s/api/v3/", hostname)
 	}
 	if strings.EqualFold(hostname, localhost) {

pkg/auth/auth.go

@@ -26,6 +26,7 @@ const (
 	hostsKey              = "hosts"
 	localhost             = "github.localhost"
 	oauthToken            = "oauth_token"
+	tenancyHost           = "ghe.com" // TenancyHost is the domain suffix of a tenancy GitHub instance.
 )
 
 // TokenForHost retrieves an authentication token and the source of that token for the specified
@@ -61,7 +62,7 @@ func TokenFromEnvOrConfig(host string) (string, string) {
 }
 
 func tokenForHost(cfg *config.Config, host string) (string, string) {
-	host = normalizeHostname(host)
+	host = NormalizeHostname(host)
 	if IsEnterprise(host) {
 		if token := os.Getenv(ghEnterpriseToken); token != "" {
 			return token, ghEnterpriseToken
@@ -149,24 +150,24 @@ func defaultHost(cfg *config.Config) (string, string) {
 	return github, defaultSource
 }
 
-// TenancyHost is the domain name of a tenancy GitHub instance.
-const tenancyHost = "ghe.com"
-
 // IsEnterprise determines if a provided host is a GitHub Enterprise Server instance,
 // rather than GitHub.com or a tenancy GitHub instance.
 func IsEnterprise(host string) bool {
-	normalizedHost := normalizeHostname(host)
+	normalizedHost := NormalizeHostname(host)
 	return normalizedHost != github && normalizedHost != localhost && !IsTenancy(normalizedHost)
 }
 
 // IsTenancy determines if a provided host is a tenancy GitHub instance,
 // rather than GitHub.com or a GitHub Enterprise Server instance.
 func IsTenancy(host string) bool {
-	normalizedHost := normalizeHostname(host)
+	normalizedHost := NormalizeHostname(host)
 	return strings.HasSuffix(normalizedHost, "."+tenancyHost)
 }
 
-func normalizeHostname(host string) string {
+// NormalizeHostname ensures the host matches the values used throughout
+// the rest of the codebase with respect to hostnames. These are github,
+// localhost, and tenancyHost.
+func NormalizeHostname(host string) string {
 	hostname := strings.ToLower(host)
 	if strings.HasSuffix(hostname, "."+github) {
 		return github

pkg/auth/auth_test.go

@@ -368,7 +368,7 @@ func TestNormalizeHostname(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			normalized := normalizeHostname(tt.host)
+			normalized := NormalizeHostname(tt.host)
 			assert.Equal(t, tt.wantHost, normalized)
 		})
 	}