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host.go
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80 lines (67 loc) · 1.95 KB
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package ghinstance
import (
"errors"
"fmt"
"strings"
)
const defaultHostname = "github.com"
var hostnameOverride string
// Default returns the host name of the default GitHub instance
func Default() string {
return defaultHostname
}
// OverridableDefault is like Default, except it is overridable by the GH_HOST environment variable
func OverridableDefault() string {
if hostnameOverride != "" {
return hostnameOverride
}
return defaultHostname
}
// OverrideDefault overrides the value returned from OverridableDefault. This should only ever be
// called from the main runtime path, not tests.
func OverrideDefault(newhost string) {
hostnameOverride = newhost
}
// IsEnterprise reports whether a non-normalized host name looks like a GHE instance
func IsEnterprise(h string) bool {
return NormalizeHostname(h) != defaultHostname
}
// NormalizeHostname returns the canonical host name of a GitHub instance
func NormalizeHostname(h string) string {
hostname := strings.ToLower(h)
if strings.HasSuffix(hostname, "."+defaultHostname) {
return defaultHostname
}
return hostname
}
func HostnameValidator(v interface{}) error {
hostname, valid := v.(string)
if !valid {
return errors.New("hostname is not a string")
}
if len(strings.TrimSpace(hostname)) < 1 {
return errors.New("a value is required")
}
if strings.ContainsRune(hostname, '/') || strings.ContainsRune(hostname, ':') {
return errors.New("invalid hostname")
}
return nil
}
func GraphQLEndpoint(hostname string) string {
if IsEnterprise(hostname) {
return fmt.Sprintf("https://%s/api/graphql", hostname)
}
return "https://api.github.com/graphql"
}
func RESTPrefix(hostname string) string {
if IsEnterprise(hostname) {
return fmt.Sprintf("https://%s/api/v3/", hostname)
}
return "https://api.github.com/"
}
func GistPrefix(hostname string) string {
if IsEnterprise(hostname) {
return fmt.Sprintf("https://%s/gist/", hostname)
}
return fmt.Sprintf("https://gist.%s/", hostname)
}