Tool to replay a pull subscription to a topic

[tcnghia]

This tool uses the local gcloud credentials to listen to a pull subscription (intended for the pull subscription we created by default for each dead letter topic), and send it back to a topic (the original topic).

Example usage:

❯ go run . --source=nghia-...-dlq-pjxu --dest=nghia-...-us-central1 --projectID nghia-...
Listening for messages.
Found message: { "content": "this is a test" }
Found message: { "content": "this is a test" }
Found message: { "content": "this is a test" }
Found message: { "content": "this is a test" }
Found message: { "content": "this is a test" }
Found message: { "content": "this is a test" }
Found message: { "content": "this is a test" }
Found message: { "content": "this is a test" }
Found message: { "content": "this is a test" }
Replayed message: { "content": "this is a test" }
Replayed message: { "content": "this is a test" }
Replayed message: { "content": "this is a test" }
Replayed message: { "content": "this is a test" }
Replayed message: { "content": "this is a test" }
Replayed message: { "content": "this is a test" }
Replayed message: { "content": "this is a test" }
Replayed message: { "content": "this is a test" }
Replayed message: { "content": "this is a test" }
Found message: { "content": "this is a test" }
Replayed message: { "content": "this is a test" }
No messages received in the last 10s . Exiting.