37 lines
1,011 B
Go
37 lines
1,011 B
Go
package env
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import (
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"os"
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"strings"
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)
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// Get retrieves the value of the environment variable named
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// by the key. If the variable is present in the environment the
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// value (which may be empty) is returned. Otherwise it returns
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// the specified default value.
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func Get(key, defaultValue string) string {
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if v, ok := os.LookupEnv(key); ok {
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return v
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}
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return defaultValue
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}
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// Lookup retrieves the value of the environment variable named
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// by the key. If the variable is present in the environment the
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// value (which may be empty) is returned and the boolean is true.
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// Otherwise the returned value will be empty and the boolean will
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// be false.
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func Lookup(key string) (string, bool) { return os.LookupEnv(key) }
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// List all envs with a given prefix.
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func List(prefix string) (envs []string) {
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for _, env := range os.Environ() {
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if strings.HasPrefix(env, prefix) {
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values := strings.SplitN(env, "=", 2)
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if len(values) == 2 {
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envs = append(envs, values[0])
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}
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}
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}
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return envs
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}
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