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(.module:
  [lux (#- Module Source)
   [control
    [pipe (#+ case>)]
    ["<>" parser
     ["." cli (#+ Parser)]]]
   [tool
    [compiler
     [meta
      [archive
       [descriptor (#+ Module)]]]]]
   [world
    [file (#+ Path)]]])

(type: #export Source
  Path)

(type: #export Library
  Path)

(type: #export Target
  Path)

(type: #export Compilation
  [(List Source) (List Library) Target Module])

(type: #export Export
  [(List Source) Target])

(type: #export Service
  (#Compilation Compilation)
  (#Interpretation Compilation)
  (#Export Export))

(template [<name> <long> <type>]
  [(def: <name>
     (Parser <type>)
     (cli.named <long> cli.any))]

  [^source "--source" Source]
  [^library "--library" Library]
  [^target "--target" Target]
  [^module "--module" Module]
  )

(def: #export service
  (Parser Service)
  ($_ <>.or
      (<>.after (cli.this "build")
                ($_ <>.and
                    (<>.some ..^source)
                    (<>.some ..^library)
                    ..^target
                    ..^module))
      (<>.after (cli.this "repl")
                ($_ <>.and
                    (<>.some ..^source)
                    (<>.some ..^library)
                    ..^target
                    ..^module))
      (<>.after (cli.this "export")
                ($_ <>.and
                    (<>.some ..^source)
                    ..^target))
      ))

(def: #export target
  (-> Service Target)
  (|>> (case> (^or (#Compilation [sources libraries target module])
                   (#Interpretation [sources libraries target module])
                   (#Export [sources target]))
              target)))