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31 lines
493 B
Go
31 lines
493 B
Go
package eval
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import (
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"errors"
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"os"
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)
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var errNonExistentEnvVar = errors.New("non-existent environment variable")
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func init() {
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addBuiltinFns(map[string]interface{}{
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"has-env": hasEnv,
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"get-env": getEnv,
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"set-env": os.Setenv,
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"unset-env": os.Unsetenv,
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})
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}
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func hasEnv(key string) bool {
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_, ok := os.LookupEnv(key)
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return ok
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}
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func getEnv(key string) (string, error) {
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value, ok := os.LookupEnv(key)
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if !ok {
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return "", errNonExistentEnvVar
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}
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return value, nil
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}
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