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- package eval
- import (
- "errors"
- "os"
- )
- // ErrNonExistentEnvVar is raised by the get-env command when the environment
- // variable does not exist.
- var ErrNonExistentEnvVar = errors.New("non-existent environment variable")
- func init() {
- addBuiltinFns(map[string]any{
- "has-env": hasEnv,
- "get-env": getEnv,
- "set-env": os.Setenv,
- "unset-env": os.Unsetenv,
- })
- }
- func hasEnv(key string) bool {
- _, ok := os.LookupEnv(key)
- return ok
- }
- func getEnv(key string) (string, error) {
- value, ok := os.LookupEnv(key)
- if !ok {
- return "", ErrNonExistentEnvVar
- }
- return value, nil
- }
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