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f4312aef8a
* Fix Dockerfile base Go version Signed-off-by: dusanb94 <dusan.borovcanin@mainflux.com> * Update Go version and dependencies Signed-off-by: dusanb94 <dusan.borovcanin@mainflux.com>
31 lines
774 B
Go
31 lines
774 B
Go
package 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 validated, and it's up to the application inside the container
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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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arr := strings.SplitN(val, "=", 2)
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if arr[0] == "" {
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return "", errors.New("invalid environment variable: " + val)
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}
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if len(arr) > 1 {
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return val, nil
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}
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if envVal, ok := os.LookupEnv(arr[0]); ok {
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return arr[0] + "=" + envVal, nil
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}
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return val, nil
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}
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