open-nomad/client/taskenv/network.go

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package taskenv
import (
"github.com/hashicorp/nomad/nomad/structs"
)
// InterpolateNetworks returns an interpolated copy of the task group networks
// with values from the task's environment.
//
// Current interoperable fields:
// - Hostname
func InterpolateNetworks(taskEnv *TaskEnv, networks structs.Networks) structs.Networks {
// Guard against not having a valid taskEnv. This can be the case if the
// PreKilling or Exited hook is run before Poststart.
if taskEnv == nil || networks == nil {
return nil
}
// Create a copy of the networks array, so we can manipulate the copy.
interpolated := networks.Copy()
// Iterate the copy and perform the interpolation.
for i := range interpolated {
interpolated[i].Hostname = taskEnv.ReplaceEnv(interpolated[i].Hostname)
}
return interpolated
}