Support environment variables source

[serbrech]

Is there any plans to add Environment variables as a source?

pseudo code :

s := staert.NewStaert(command)
env := staert.NewEnvSource("PREFIX_")
s.AddSource(env)

[ldez]

Related to #30

[serbrech]

Great, so... why was it not merged? :) Was it because it didn't use flaeg parsing? How do I pick this up?

[ldez]

The contributor gave up.
You can read this discussion https://traefik.slackarchive.io/dev/page-17/ts-1497598028679523
Come the Traefik community Slack channel in the channel #dev if you need to ask some questions about the design.

[serbrech]

Great, I'll pick this one up then :)

[serbrech]

Plan :

• Implement Pull parser.go into a separate package flaeg#40
• Pick [PROPOSAL][WIP] Enable user to extract configuration from environment variables. #30 and finish it.