30 lines
785 B
Go
30 lines
785 B
Go
package opts // import "github.com/docker/docker/opts"
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import (
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"os"
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"strings"
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"github.com/pkg/errors"
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)
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// ValidateEnv validates an environment variable and returns it.
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// If no value is specified, it obtains its value from the current environment
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//
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// As on ParseEnvFile and related to #16585, environment variable names
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// are not validate whatsoever, it's up to application inside docker
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// to validate them or not.
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//
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// The only validation here is to check if name is empty, per #25099
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func ValidateEnv(val string) (string, error) {
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k, _, ok := strings.Cut(val, "=")
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if k == "" {
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return "", errors.New("invalid environment variable: " + val)
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}
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if ok {
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return val, nil
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}
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if envVal, ok := os.LookupEnv(k); ok {
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return k + "=" + envVal, nil
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}
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return val, nil
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}
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