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(.module:
[lux (#- Name)
[abstract
[equivalence (#+ Equivalence)]
[monoid (#+ Monoid)]
["." monad (#+ do)]]
[control
["." try (#+ Try)]
["." exception (#+ exception:)]]
[data
["." text
["%" format (#+ format)]]
[collection
["." dictionary (#+ Dictionary)]
["." set (#+ Set)]
["." list ("#\." fold)]]]]
["." // #_
["#" profile (#+ Name Profile)]])
(def: #export file
"project.lux")
(type: #export Project
(Dictionary Name Profile))
(def: #export (project name profile)
(-> Name Profile Project)
(dictionary.from-list text.hash (list [name profile])))
(def: #export equivalence
(Equivalence Project)
(dictionary.equivalence //.equivalence))
(structure: #export monoid
(Monoid Project)
(def: identity
(dictionary.new text.hash))
(def: compose
(dictionary.merge-with (\ //.monoid compose))))
(exception: #export (unknown-profile {name Name})
(exception.report
["Name" (%.text name)]))
(exception: #export (circular-dependency {dependee Name} {dependent Name})
(exception.report
["Dependent" (%.text dependent)]
["Dependee" (%.text dependee)]))
(def: (profile' lineage project name)
(-> (Set Name) Project Name (Try Profile))
(case (dictionary.get name project)
(#.Some profile)
(case (list.find (set.member? lineage)
(get@ #//.parents profile))
(#.Some ouroboros)
(exception.throw ..circular-dependency [ouroboros name])
#.None
(do {! try.monad}
[parents (monad.map ! (profile' (set.add name lineage) project)
(get@ #//.parents profile))]
(wrap (list\fold (function (_ parent child)
(\ //.monoid compose child parent))
(set@ #//.parents (list) profile)
parents))))
#.None
(exception.throw ..unknown-profile [name])))
(def: #export (profile name project)
(-> Name Project (Try Profile))
(..profile' (set.new text.hash) project name))
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