Butler: export Coordinator host in environment.

logdog/client/cmd/logdog_butler/subcommand_stream.go

 // Copyright 2015 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package main
 
 import (
         "os"
 
         "github.com/luci/luci-go/common/errors"
@@ skipping 60 matching lines @@
                         }.Errorf(a, "Failed to open input stream file.")
                         return runtimeErrorReturnCode
                 }
                 streamFile = file
         }
         if cmd.stream.Name == "" {
                 cmd.stream.Name = defaultStreamName
         }
 
         // We think everything should work. Configure our Output instance.
-        output, err := a.configOutput()
+        of, err := a.getOutputFactory()
+        if err != nil {
+                log.WithError(err).Errorf(a, "Failed to get output factory instance.")
+                return runtimeErrorReturnCode
+        }
+        output, err := of.configOutput(a)
         if err != nil {
                 log.WithError(err).Errorf(a, "Failed to create output instance.")
                 return runtimeErrorReturnCode
         }
         defer output.Close()
 
         // Instantiate our Processor.
         err = a.runWithButler(a, output, func(ctx context.Context, b *butler.Butler) error {
                 if err := b.AddStream(streamFile, cmd.stream.properties()); err != nil {
                         return errors.Annotate(err).Reason("failed to add stream").Err()
                 }
 
                 b.Activate()
                 return b.Wait()
         })
         if err != nil {
                 logAnnotatedErr(a, err, "Failed to stream file.")
                 return runtimeErrorReturnCode
         }
 
         return 0
 }