//Prepare the hroot output
func (d *Hroot) PrepareOutput() {
switch d.dest.scheme {
case "graph":
//Look up the graph, and clear any unwanted state
d.dest.graph = dex.NewGraph(d.folders.Graph)
//If the user's git config isn't ready, we want to tell them *before* building.
if !d.dest.graph.IsConfigReady() {
ExitGently("\n" +
"Git could not find a user name & email." + "\n" +
"You'll need to set up git with the following commands:" + "\n\n" +
"git config --global user.email \"[email protected]\"" + "\n" +
"git config --global user.name \"Your Name\"")
}
//Cleanse the graph unless it'd be redundant.
Println("Opening destination repository")
case "file":
//If the user did not specify an image path, set one
if d.dest.path == "" {
d.dest.path = "./image.tar"
}
//If the user is insane and wants to overwrite his source tar, stop him.
// Not at all robust (absolute paths? what are those? etc)
if d.source.scheme == "file" && d.source.path == d.dest.path {
ExitGently("Tar location is same for source and destination:", d.source.path)
}
case "index":
ExitGently("Destination", d.dest.scheme, "is not supported yet.")
}
}
//Prepare the hroot input
func (d *Hroot) PrepareInput() {
//If you're using an index key with a non-index source, or upstream key with index source, reject.
//Runs here (not LoadHroot) so commands have a chance to change settings.
if d.source.scheme == "index" && d.image.Index == "" {
ExitGently("You asked to pull from the index but have no index key configured.")
} else if d.source.scheme != "index" && d.image.Upstream == "" {
if d.source.scheme == "docker" {
Println("Running an index image from docker cache.")
} else {
ExitGently("You asked to run from from", d.source.scheme, "but have no upstream key configured.")
}
}
switch d.source.scheme {
case "graph":
//Look up the graph, and clear any unwanted state
d.source.graph = dex.NewGraph(d.folders.Graph)
Println("Opening source repository")
case "file":
//If the user did not specify an image path, set one
if d.source.path == "" {
d.source.path = "./image.tar"
}
case "index":
//If pulling from the index, use the index key instead (protect URL namespace from docker)
d.launchImage = d.image.Index
}
}