mirror of
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48 lines
1.5 KiB
Go
48 lines
1.5 KiB
Go
package config
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import (
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"fmt"
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"reflect"
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gofig "github.com/gookit/config/v2"
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"github.com/owncloud/ocis/ocis-pkg/shared"
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)
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// BindEnv takes a config `c` and a EnvBinding and binds the values from the environment to the address location in cfg.
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func BindEnv(c *gofig.Config, bindings []shared.EnvBinding) error {
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return bindEnv(c, bindings)
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}
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func bindEnv(c *gofig.Config, bindings []shared.EnvBinding) error {
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for i := range bindings {
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for j := range bindings[i].EnvVars {
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// we need to guard against v != "" because this is the condition that checks that the value is set from the environment.
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// the `ok` guard is not enough, apparently.
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if v, ok := c.GetValue(bindings[i].EnvVars[j]); ok && v != "" {
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// get the destination type from destination
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switch reflect.ValueOf(bindings[i].Destination).Type().String() {
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case "*bool":
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r := c.Bool(bindings[i].EnvVars[j])
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*bindings[i].Destination.(*bool) = r
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case "*string":
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r := c.String(bindings[i].EnvVars[j])
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*bindings[i].Destination.(*string) = r
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case "*int":
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r := c.Int(bindings[i].EnvVars[j])
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*bindings[i].Destination.(*int) = r
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case "*float64":
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// defaults to float64
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r := c.Float(bindings[i].EnvVars[j])
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*bindings[i].Destination.(*float64) = r
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default:
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// it is unlikely we will ever get here. Let this serve more as a runtime check for when debugging.
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return fmt.Errorf("invalid type for env var: `%v`", bindings[i].EnvVars[j])
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}
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}
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}
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}
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return nil
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}
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