116 lines
4.0 KiB
Plaintext
116 lines
4.0 KiB
Plaintext
import Lean.Data.Json
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import Lean.Environment
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import Pantograph.Version
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import Pantograph
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-- Main IO functions
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open Pantograph
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/-- Parse a command either in `{ "cmd": ..., "payload": ... }` form or `cmd { ... }` form. -/
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def parseCommand (s: String): Except String Protocol.Command := do
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let s := s.trim
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match s.get? 0 with
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| .some '{' => -- Parse in Json mode
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Lean.fromJson? (← Lean.Json.parse s)
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| .some _ => -- Parse in line mode
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let offset := s.posOf ' ' |> s.offsetOfPos
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if offset = s.length then
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return { cmd := s.take offset, payload := Lean.Json.null }
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else
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let payload ← s.drop offset |> Lean.Json.parse
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return { cmd := s.take offset, payload := payload }
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| .none => throw "Command is empty"
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unsafe def loop : MainM Unit := do
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let state ← get
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let command ← (← IO.getStdin).getLine
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if command.trim.length = 0 then return ()
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match parseCommand command with
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| .error error =>
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let error := Lean.toJson ({ error := "command", desc := error }: Protocol.InteractionError)
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-- Using `Lean.Json.compress` here to prevent newline
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IO.println error.compress
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| .ok command =>
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let ret ← execute command
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let str := match state.options.printJsonPretty with
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| true => ret.pretty
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| false => ret.compress
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IO.println str
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loop
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namespace Lean
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/-- This is better than the default version since it handles `.` and doesn't
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crash the program when it fails. -/
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def setOptionFromString' (opts : Options) (entry : String) : ExceptT String IO Options := do
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let ps := (entry.splitOn "=").map String.trim
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let [key, val] ← pure ps | throw "invalid configuration option entry, it must be of the form '<key> = <value>'"
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let key := key.toName
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let defValue ← getOptionDefaultValue key
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match defValue with
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| DataValue.ofString _ => pure $ opts.setString key val
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| DataValue.ofBool _ =>
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match val with
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| "true" => pure $ opts.setBool key true
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| "false" => pure $ opts.setBool key false
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| _ => throw s!"invalid Bool option value '{val}'"
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| DataValue.ofName _ => pure $ opts.setName key val.toName
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| DataValue.ofNat _ =>
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match val.toNat? with
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| none => throw s!"invalid Nat option value '{val}'"
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| some v => pure $ opts.setNat key v
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| DataValue.ofInt _ =>
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match val.toInt? with
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| none => throw s!"invalid Int option value '{val}'"
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| some v => pure $ opts.setInt key v
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| DataValue.ofSyntax _ => throw s!"invalid Syntax option value"
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end Lean
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unsafe def main (args: List String): IO Unit := do
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-- NOTE: A more sophisticated scheme of command line argument handling is needed.
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-- Separate imports and options
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if args == ["--version"] then do
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println! s!"{version}"
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return
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Lean.enableInitializersExecution
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Lean.initSearchPath (← Lean.findSysroot)
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let options? ← args.filterMap (λ s => if s.startsWith "--" then .some <| s.drop 2 else .none)
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|>.foldlM Lean.setOptionFromString' Lean.Options.empty
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|>.run
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let options ← match options? with
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| .ok options => pure options
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| .error e => throw $ IO.userError s!"Options cannot be parsed: {e}"
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let imports:= args.filter (λ s => ¬ (s.startsWith "--"))
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let env ← Lean.importModules
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(imports := imports.toArray.map (λ str => { module := str.toName, runtimeOnly := false }))
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(opts := {})
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(trustLevel := 1)
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let context: Context := {
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imports
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}
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let coreContext: Lean.Core.Context := {
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currNamespace := Lean.Name.str .anonymous "Aniva"
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openDecls := [], -- No 'open' directives needed
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fileName := "<Pantograph>",
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fileMap := { source := "", positions := #[0], lines := #[1] },
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options := options
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}
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try
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let termElabM := loop.run context |>.run' {}
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let metaM := termElabM.run' (ctx := {
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declName? := some "_pantograph",
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errToSorry := false
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})
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let coreM := metaM.run'
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IO.println "ready."
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discard <| coreM.toIO coreContext { env := env }
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catch ex =>
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IO.println "Uncaught IO exception"
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IO.println ex.toString
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