132 lines
3.6 KiB
Go
132 lines
3.6 KiB
Go
package ghinstance
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import (
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"errors"
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"fmt"
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"strings"
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)
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// DefaultHostname is the domain name of the default GitHub instance.
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const defaultHostname = "github.com"
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// Localhost is the domain name of a local GitHub instance.
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const localhost = "github.localhost"
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// TenancyHost is the domain name of a tenancy GitHub instance.
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const tenancyHost = "ghe.com"
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// Default returns the host name of the default GitHub instance.
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func Default() string {
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return defaultHostname
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}
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// IsEnterprise reports whether a non-normalized host name looks like a GHE instance.
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func IsEnterprise(h string) bool {
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normalizedHostName := NormalizeHostname(h)
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return normalizedHostName != defaultHostname && normalizedHostName != localhost
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}
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// IsTenancy reports whether a non-normalized host name looks like a tenancy instance.
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func IsTenancy(h string) bool {
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normalizedHostName := NormalizeHostname(h)
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return strings.HasSuffix(normalizedHostName, "."+tenancyHost)
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}
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// TenantName extracts the tenant name from tenancy host name and
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// reports whether it found the tenant name.
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func TenantName(h string) (string, bool) {
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normalizedHostName := NormalizeHostname(h)
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return cutSuffix(normalizedHostName, "."+tenancyHost)
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}
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func isGarage(h string) bool {
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return strings.EqualFold(h, "garage.github.com")
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}
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// NormalizeHostname returns the canonical host name of a GitHub instance.
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func NormalizeHostname(h string) string {
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hostname := strings.ToLower(h)
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if strings.HasSuffix(hostname, "."+defaultHostname) {
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return defaultHostname
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}
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if strings.HasSuffix(hostname, "."+localhost) {
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return localhost
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}
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if before, found := cutSuffix(hostname, "."+tenancyHost); found {
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idx := strings.LastIndex(before, ".")
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return fmt.Sprintf("%s.%s", before[idx+1:], tenancyHost)
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}
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return hostname
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}
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func HostnameValidator(hostname string) error {
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if len(strings.TrimSpace(hostname)) < 1 {
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return errors.New("a value is required")
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}
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if strings.ContainsRune(hostname, '/') || strings.ContainsRune(hostname, ':') {
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return errors.New("invalid hostname")
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}
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return nil
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}
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func GraphQLEndpoint(hostname string) string {
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if isGarage(hostname) {
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return fmt.Sprintf("https://%s/api/graphql", hostname)
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}
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if IsEnterprise(hostname) {
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return fmt.Sprintf("https://%s/api/graphql", hostname)
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}
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if strings.EqualFold(hostname, localhost) {
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return fmt.Sprintf("http://api.%s/graphql", hostname)
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}
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return fmt.Sprintf("https://api.%s/graphql", hostname)
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}
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func RESTPrefix(hostname string) string {
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if isGarage(hostname) {
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return fmt.Sprintf("https://%s/api/v3/", hostname)
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}
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if IsEnterprise(hostname) {
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return fmt.Sprintf("https://%s/api/v3/", hostname)
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}
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if strings.EqualFold(hostname, localhost) {
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return fmt.Sprintf("http://api.%s/", hostname)
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}
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return fmt.Sprintf("https://api.%s/", hostname)
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}
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func GistPrefix(hostname string) string {
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prefix := "https://"
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if strings.EqualFold(hostname, localhost) {
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prefix = "http://"
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}
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return prefix + GistHost(hostname)
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}
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func GistHost(hostname string) string {
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if isGarage(hostname) {
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return fmt.Sprintf("%s/gist/", hostname)
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}
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if IsEnterprise(hostname) {
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return fmt.Sprintf("%s/gist/", hostname)
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}
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if strings.EqualFold(hostname, localhost) {
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return fmt.Sprintf("%s/gist/", hostname)
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}
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return fmt.Sprintf("gist.%s/", hostname)
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}
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func HostPrefix(hostname string) string {
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if strings.EqualFold(hostname, localhost) {
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return fmt.Sprintf("http://%s/", hostname)
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}
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return fmt.Sprintf("https://%s/", hostname)
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}
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// Backport strings.CutSuffix from Go 1.20.
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func cutSuffix(s, suffix string) (string, bool) {
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if !strings.HasSuffix(s, suffix) {
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return s, false
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}
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return s[:len(s)-len(suffix)], true
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}
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