# Welcome!
![Hackage: Pub](https://img.shields.io/hackage/v/pub.svg?style=flat)
![Build Status: Pub](https://travis-ci.org/ixmatus/pub.svg?branch=master)

The `pub` utility publishes input from stdin to a redis channel and the `sub`
utility consumes from a redis channel, writing to stdout.

## Quickstart
Publishing to Redis from `stdin` is easy with the `pub` utility:
```shell
$ pub --help
Pipe stdin to a redis pub/sub channel

Usage: pub --channel TEXT [--host STRING] [--port INTEGER] [--db INTEGER]
           [--version]

Available options:
  -h,--help                Show this help text
  --channel TEXT           Redis channel to publish to
  --host STRING            Redis host (default: localhost)
  --port INTEGER           Redis post (default: 6379)
  --db INTEGER             Redis db (default: 0)

$ journalctl -f nginx.service | pub --channel "nginx-loglines"
```

and subscribing to Redis channels and piping to `stdout` is also easy with the
`sub` utility:

```shell
$ sub --help
Subscribe to redis channels and pipe to stdout

Usage: sub [--channel TEXT]... [--host STRING] [--port INTEGER] [--db INTEGER]
           [--version]

Available options:
  -h,--help                Show this help text
  --channel TEXT...        Redis channel(s) to subscribe to
  --host STRING            Redis host (default: localhost)
  --port INTEGER           Redis post (default: 6379)
  --db INTEGER             Redis db (default: 0)

$ sub --channel "nginx-loglines" --channel "haproxy-loglines" # This subscribes to both redis channels
```

## Building
You can build multiple ways:

- `stack build`
- `cabal build`
- `nix-build --not-out-link -A pub release.nix`
- `nix-shell -A pub.env release.nix`