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from_env.go
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package config
import (
"fmt"
"os"
"sort"
"strconv"
"github.com/cli/cli/v2/internal/ghinstance"
"github.com/cli/cli/v2/pkg/set"
)
const (
GH_HOST = "GH_HOST"
GH_TOKEN = "GH_TOKEN"
GITHUB_TOKEN = "GITHUB_TOKEN"
GH_ENTERPRISE_TOKEN = "GH_ENTERPRISE_TOKEN"
GITHUB_ENTERPRISE_TOKEN = "GITHUB_ENTERPRISE_TOKEN"
CODESPACES = "CODESPACES"
)
type ReadOnlyEnvError struct {
Variable string
}
func (e *ReadOnlyEnvError) Error() string {
return fmt.Sprintf("read-only value in %s", e.Variable)
}
func InheritEnv(c Config) Config {
return &envConfig{Config: c}
}
type envConfig struct {
Config
}
func (c *envConfig) Hosts() ([]string, error) {
hosts, err := c.Config.Hosts()
if err != nil {
return nil, err
}
hostSet := set.NewStringSet()
hostSet.AddValues(hosts)
// If GH_HOST is set then add it to list.
if host := os.Getenv(GH_HOST); host != "" {
hostSet.Add(host)
}
// If there is a valid environment variable token for the
// default host then add default host to list.
if token, _ := AuthTokenFromEnv(ghinstance.Default()); token != "" {
hostSet.Add(ghinstance.Default())
}
s := hostSet.ToSlice()
// If default host is in list then move it to the front.
sort.SliceStable(s, func(i, j int) bool { return s[i] == ghinstance.Default() })
return s, nil
}
func (c *envConfig) DefaultHost() (string, error) {
val, _, err := c.DefaultHostWithSource()
return val, err
}
func (c *envConfig) DefaultHostWithSource() (string, string, error) {
if host := os.Getenv(GH_HOST); host != "" {
return host, GH_HOST, nil
}
return c.Config.DefaultHostWithSource()
}
func (c *envConfig) Get(hostname, key string) (string, error) {
val, _, err := c.GetWithSource(hostname, key)
return val, err
}
func (c *envConfig) GetWithSource(hostname, key string) (string, string, error) {
if hostname != "" && key == "oauth_token" {
if token, env := AuthTokenFromEnv(hostname); token != "" {
return token, env, nil
}
}
return c.Config.GetWithSource(hostname, key)
}
func (c *envConfig) GetOrDefault(hostname, key string) (val string, err error) {
val, _, err = c.GetOrDefaultWithSource(hostname, key)
return
}
func (c *envConfig) GetOrDefaultWithSource(hostname, key string) (val string, src string, err error) {
val, src, err = c.GetWithSource(hostname, key)
if err == nil && val == "" {
val = c.Default(key)
}
return
}
func (c *envConfig) Default(key string) string {
return c.Config.Default(key)
}
func (c *envConfig) CheckWriteable(hostname, key string) error {
if hostname != "" && key == "oauth_token" {
if token, env := AuthTokenFromEnv(hostname); token != "" {
return &ReadOnlyEnvError{Variable: env}
}
}
return c.Config.CheckWriteable(hostname, key)
}
func AuthTokenFromEnv(hostname string) (string, string) {
if ghinstance.IsEnterprise(hostname) {
if token := os.Getenv(GH_ENTERPRISE_TOKEN); token != "" {
return token, GH_ENTERPRISE_TOKEN
}
if token := os.Getenv(GITHUB_ENTERPRISE_TOKEN); token != "" {
return token, GITHUB_ENTERPRISE_TOKEN
}
if isCodespaces, _ := strconv.ParseBool(os.Getenv(CODESPACES)); isCodespaces {
return os.Getenv(GITHUB_TOKEN), GITHUB_TOKEN
}
return "", ""
}
if token := os.Getenv(GH_TOKEN); token != "" {
return token, GH_TOKEN
}
return os.Getenv(GITHUB_TOKEN), GITHUB_TOKEN
}
func AuthTokenProvidedFromEnv() bool {
return os.Getenv(GH_ENTERPRISE_TOKEN) != "" ||
os.Getenv(GITHUB_ENTERPRISE_TOKEN) != "" ||
os.Getenv(GH_TOKEN) != "" ||
os.Getenv(GITHUB_TOKEN) != ""
}
func IsHostEnv(src string) bool {
return src == GH_HOST
}
func IsEnterpriseEnv(src string) bool {
return src == GH_ENTERPRISE_TOKEN || src == GITHUB_ENTERPRISE_TOKEN
}