Use flags on commandline

[jforest]

Rolls in all the changes from my previous pull request #1 , plus adds command line flags, allowing configuration of where the targets file is, the interval, bucket, statsd_host, statsd_port, and debug.

Debug will turn on output to stdout, like before, but by default it doesn't output anything to stdout

[jaxxstorm]

Hey @jforest - wondered if you could help. Was trying to build your PR into a binary and got the following error:

# command-line-arguments
./smoketcp.go:81: cannot use s (type statsd.Statter) as type *statsd.Client in argument to doEvery: need type assertion

Not great with Go so no idea how to fix..

[jforest]

I don't see any issues at all when building:

siena-2:smoketcp jforest$ git branch
  master
* use_flags_on_commandline
siena-2:smoketcp jforest$ ls
LICENSE-2.0.txt NOTICE      README.md   smoketcp.go
siena-2:smoketcp jforest$ go build
siena-2:smoketcp jforest$ ls
LICENSE-2.0.txt NOTICE      README.md   smoketcp    smoketcp.go
siena-2:smoketcp jforest$ ./smoketcp --help
Usage of ./smoketcp:
  -bucket="smoketcp": Graphite bucket prefix
  -debug=false: if true, turn on debugging output
  -interval=10: How often to run the tests
  -statsdHost="localhost": Statsd Hostname
  -statsdPort="8125": Statsd port
  -targetFile="targets": File containing the list of targets, ex: server1:80

[jaxxstorm]

Which version of go are you using? I'm on 1.4.2, possibly need to downgrade?

~/go/src/github.com/vimeo/smoketcp $ go version
go version go1.4.2 linux/amd64

[jforest]

siena-2:smoketcp jforest$ go version
go version go1.4 darwin/amd64