119 lines
5 KiB
Text
119 lines
5 KiB
Text
/-
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Copyright (c) 2024 Joseph Tooby-Smith. All rights reserved.
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Released under Apache 2.0 license.
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Authors: Joseph Tooby-Smith
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-/
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import Batteries.Lean.HashSet
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import Lean
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import HepLean.Meta.AllFilePaths
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/-!
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This file enables us to transverse tactics and test for conditions.
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## References
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The content of this file is based on the following sources (released under the Apache 2.0 license):
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- https://github.com/dwrensha/tryAtEachStep/blob/main/tryAtEachStep.lean
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- https://github.com/lean-dojo/LeanDojo/blob/main/src/lean_dojo/data_extraction/ExtractData.lean
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Modifications have been made to the original content of these files here.
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See also:
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- https://leanprover.zulipchat.com/#narrow/stream/270676-lean4/topic/Memory.20increase.20in.20loops.2E
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-/
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open Lean Elab System
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namespace transverseTactics
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partial def processCommands : Frontend.FrontendM (List (Environment × InfoState)) := do
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/- Very roughly, `Frontend.FrontendM (List (Environment × InfoState))` is equivalent
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to `Frontend.Context → Frontend.state → List (Environment × InfoState)`.
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The `←get` here is returning the inputted value of `Frontend.state`,
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from which we get the enviroment.
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-/
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let env := (←get).commandState.env
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/- Processes a single command, adding it to `env`. This is done using
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`modify fun s => { s with commands := s.commands.push cmd }` as part of
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`Frontend.processCommand`. -/
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let done ← Frontend.processCommand
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/- Gets the updated `Frontend.state`. -/
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let st := ← get
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/- Gets the infostate associated with the single command. -/
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let infoState := st.commandState.infoState
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set {st with commandState := {st.commandState with infoState := {}}}
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if done
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then return [(env, infoState)]
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else
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/- For each command, we return the enviroment before the command is processed,
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and the `infoState` associated with that command. -/
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return (env, infoState) :: (←processCommands)
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def visitInfo (file : FilePath) (env : Environment)
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(visitTacticInfo : FilePath → ContextInfo → TacticInfo → MetaM Unit) (ci : ContextInfo)
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(info : Info) (acc : List (IO Unit)) : List (IO Unit) :=
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match info with
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| .ofTacticInfo ti =>
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(ci.runMetaM default
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(do setEnv env
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try visitTacticInfo file ci ti
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catch e =>
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println! "caught: {←e.toMessageData.toString}")) :: acc
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| _ => acc
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def traverseForest (file : FilePath)
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(visitTacticInfo : FilePath → ContextInfo → TacticInfo → MetaM Unit)
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(steps : List (Environment × InfoState)) : List (IO Unit) :=
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let t := steps.map fun (env, infoState) ↦
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(infoState.trees.toList.map fun t ↦
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(Lean.Elab.InfoTree.foldInfo (visitInfo file env visitTacticInfo) [] t).reverse)
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t.join.join
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end transverseTactics
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open transverseTactics in
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unsafe def transverseTactics (file : FilePath)
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(visitTacticInfo : FilePath → ContextInfo → TacticInfo → MetaM Unit) : IO Unit := do
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searchPathRef.set compile_time_search_path%
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/- This is equivalent to `(IO.FS.readFile file).bind (fun fileContent => do ...)`. -/
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let fileContent ← IO.FS.readFile file
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enableInitializersExecution
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/- Get `Parser.InputContext` from file. -/
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let inputCtx := Parser.mkInputContext fileContent file.toString -- The input content of the file
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/- We parse the header. Recall that the parser is takes a string and
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outputs a Lean syntax object. -/
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let (header, parserState, messages) ← Parser.parseHeader inputCtx
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/- Recall that the elborator turns a Lean syntax object into a Lean Expr object.
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In the below, we process the header, creating an enviroment with the relevent imports.
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This can be thought of as creating an import only file. -/
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if messages.hasErrors then
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for msg in messages.toList do
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if msg.severity == .error then
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println! "ERROR: {← msg.toString}"
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throw $ IO.userError "Errors during import; aborting"
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for msg in messages.toList do
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println! "{← msg.toString}"
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let (env, messages) ← processHeader header {} messages inputCtx
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if messages.hasErrors then
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for msg in messages.toList do
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if msg.severity == .error then
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println! "ERROR: {← msg.toString}"
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throw $ IO.userError "Errors during import; aborting"
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/- As part of the enviroment header is the module name. This is not included
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in our current `env`. So we include it now. -/
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let env1 := env.setMainModule (← moduleNameOfFileName file none)
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/- From the enviroment, we create a state of the `Command` monad. -/
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let commandState := {Command.mkState env1 messages {} with infoState.enabled := true}
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/- We create a state of the `Frontend` monad-/
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/- Runs the `processCommands` function on the context defined by `inputCtx`, and the
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state defined by `frontendState`. -/
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let (steps, _frontendState) ← (processCommands.run { inputCtx := inputCtx }).run
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{ commandState := commandState, parserState := parserState, cmdPos := parserState.pos }
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/- Note that for us, each `infoState.trees` is actually of length 1. -/
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for t in traverseForest file visitTacticInfo steps do
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try t
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catch e =>
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println! "caught top level: {e}"
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pure ()
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