This is a breaking change, but the previous behaviour was broken so I'm
not concerned.
Also made most programmer errors more useful by giving type.field
context information.
Fixes#179.
This provides much more convenient composition when reusing structs in
different parts of the command grammar.
eg.
type Embedded struct {
Key string `help:"A key from ${where}."`
}
var cli struct {
Embedded `set:"where=somewhere"`
}
* Propagate errors.
* Use junit test output.
* Expand role of DecodeContext to include Scanner.
* Inject resolved flags as Path elements in the Context.
This allows all existing logic to apply seamlessly: hooks, required
flags, etc.
* Clarify that hooks can be called multiple times.
Alec Thomas