[joshday]

The old EasyConfig would leave dangling Configs around when getindex-ing keys that didn't exist, and then delete them explicitly with EasyConfig.delete_empty! or implicitly when calling Base.isempty (which is called during Base.show).

Since I originally wrote the package I've been meaning to do something better, and now I have:

julia> c = Config()
Config()

julia> c.one.two.three
Undefined(one → two → three)

julia> c
Config()

julia> c.one.two.three = "value"
"value"

julia> c
Config{Dict{Symbol, Any}} with 1 entry:
  :one => Config(:two => Config(:three => "value"))

Explanation in the README:

• Accessing a non-existent property creates an Undefined.
• This is necessary for assigning deeply nested properties (an eventual setindex! after nested getindex-es).
  • config.a == Undefined(config, [:a]), config.a.b == Undefined(config, [:a, :b]), etc.
• config.a.b.c = 1 == Undefined(config, [:a, :b])[:c] = 1

Other new features:

• Config can now wrap any AbstractDict{Symbol,Any}, uses Dict{Symbol,Any} by default
• deepmerge/deepmerge! for merging nested configs
• Switch from CompatHelper to Dependabot. Dependabot auto-merge workflow added (requires enabling auto-merge in the repo)

[joshday]

@aviks could I recruit you to both (1) merge this PR, and (2) transfer this to JuliaPlots (PlotlyLight is the primary dependent), my user account, or some other Julia org?

[aviks]

Do you want to make a release from here before moving?

[joshday]

@aviks that would be great if you don't mind!