82 lines
2.5 KiB
Text
82 lines
2.5 KiB
Text
/-
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Copyright (c) 2021 Mac Malone. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Authors: Mac Malone
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-/
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import Lake.BuildTask
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import Lake.BuildTrace
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namespace Lake
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-- # Build Target
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structure BuildTarget (t : Type) (a : Type) where
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artifact : a
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trace : t
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buildTask : BuildTask
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-- manually derive `Inhabited` instance because automatic deriving fails
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instance [Inhabited t] [Inhabited a] : Inhabited (BuildTarget t a) :=
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⟨Inhabited.default, Inhabited.default, BuildTask.nop⟩
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namespace BuildTarget
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def pure (artifact : a) (trace : t) : BuildTarget t a :=
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{artifact, trace, buildTask := BuildTask.nop}
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def withTrace (trace : t) (self : BuildTarget r a) : BuildTarget t a :=
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{self with trace := trace}
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def discardTrace (self : BuildTarget t a) : BuildTarget PUnit a :=
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self.withTrace ()
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def withArtifact (artifact : a) (self : BuildTarget t b) : BuildTarget t a :=
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{self with artifact := artifact}
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def discardArtifact (self : BuildTarget t α) : BuildTarget t PUnit :=
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self.withArtifact ()
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def materialize (self : BuildTarget t α) : IO PUnit :=
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self.buildTask.await
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end BuildTarget
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def afterTarget (target : BuildTarget t a) (act : IO PUnit) : IO BuildTask :=
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afterTask target.buildTask act
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def afterTargetList (targets : List (BuildTarget t a)) (act : IO PUnit) : IO BuildTask :=
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afterTaskList (targets.map (·.buildTask)) act
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instance : HAndThen (BuildTarget t a) (IO PUnit) (IO BuildTask) :=
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⟨afterTarget⟩
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instance : HAndThen (List (BuildTarget t a)) (IO PUnit) (IO BuildTask) :=
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⟨afterTargetList⟩
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-- # MTIme Build Target
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abbrev MTimeBuildTarget := BuildTarget MTime
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namespace MTimeBuildTarget
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def mtime (self : MTimeBuildTarget a) :=
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self.trace
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def mk (artifact : a) (mtime : MTime := 0) (buildTask : BuildTask) : MTimeBuildTarget a :=
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{artifact, trace := mtime, buildTask}
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def pure (artifact : a) (mtime : MTime := 0) : MTimeBuildTarget a :=
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{artifact, trace := mtime, buildTask := BuildTask.nop}
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def all (targets : List (MTimeBuildTarget a)) : IO (MTimeBuildTarget PUnit) := do
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let depsMTime := MTime.listMax <| targets.map (·.mtime)
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let task ← BuildTask.all <| targets.map (·.buildTask)
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return MTimeBuildTarget.mk () depsMTime task
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def collectAll (targets : List (MTimeBuildTarget a)) : IO (MTimeBuildTarget (List a)) := do
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let artifacts := targets.map (·.artifact)
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let depsMTime := MTime.listMax <| targets.map (·.mtime)
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let task ← BuildTask.all <| targets.map (·.buildTask)
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return MTimeBuildTarget.mk artifacts depsMTime task
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end MTimeBuildTarget
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