Main.lean

@@ -8,15 +8,20 @@ import Pantograph
 open Pantograph
 
 unsafe def loop : MainM Unit := do
+  let state ← get
   let command ← (← IO.getStdin).getLine
   if command.trim.length = 0 then return ()
   match parse_command command with
   | .error error =>
     let error  := Lean.toJson ({ error := "json", desc := error }: Commands.InteractionError)
-    IO.println (toString error)
+    -- Using `Lean.Json.compress` here to prevent newline
+    IO.println error.compress
   | .ok command =>
     let ret ← execute command
-    IO.println <| toString <| ret
+    let str := match state.options.printJsonPretty with
+      | true => ret.pretty
+      | false => ret.compress
+    IO.println str
   loop
 
 namespace Lean

Pantograph.lean

@@ -44,12 +44,12 @@ def execute (command: Commands.Command): MainM Lean.Json := do
       | .error ierror => return Lean.toJson ierror
     | .error error => pure $ error
   match command.cmd with
+  | "reset"           => run reset
+  | "expr.echo"       => run expr_echo
+  | "lib.catalog"     => run lib_catalog
+  | "lib.inspect"     => run lib_inspect
   | "options.set"     => run options_set
   | "options.print"   => run options_print
-  | "catalog"         => run catalog
-  | "inspect"         => run inspect
-  | "clear"           => run clear
-  | "expr.echo"       => run expr_echo
   | "proof.start"     => run proof_start
   | "proof.tactic"    => run proof_tactic
   | "proof.printTree" => run proof_print_tree
@@ -61,30 +61,19 @@ def execute (command: Commands.Command): MainM Lean.Json := do
   errorI (type desc: String): Commands.InteractionError := { error := type, desc := desc }
   errorIndex := errorI "index"
   -- Command Functions
-  options_set (args: Commands.OptionsSet): MainM (CR Commands.OptionsSetResult) := do
+  reset (_: Commands.Reset): MainM (CR Commands.ResetResult) := do
     let state ← get
-    let options := state.options
-    set { state with
-      options := {
-        -- FIXME: This should be replaced with something more elegant
-        printExprPretty := args.printExprPretty?.getD options.printExprPretty,
-        printExprAST := args.printExprAST?.getD options.printExprAST,
-        proofVariableDelta := args.proofVariableDelta?.getD options.proofVariableDelta,
-        printAuxDecls := args.printAuxDecls?.getD options.printAuxDecls,
-        printImplementationDetailHyps := args.printImplementationDetailHyps?.getD options.printImplementationDetailHyps
-      }
-    }
-    return .ok {  }
-  options_print (_: Commands.OptionsPrint): MainM (CR Commands.OptionsPrintResult) := do
-    return .ok (← get).options
-  catalog (_: Commands.Catalog): MainM (CR Commands.CatalogResult) := do
+    let nTrees := state.proofTrees.size
+    set { state with proofTrees := #[] }
+    return .ok { nTrees := nTrees }
+  lib_catalog (_: Commands.LibCatalog): MainM (CR Commands.LibCatalogResult) := do
     let env ← Lean.MonadEnv.getEnv
     let names := env.constants.fold (init := #[]) (λ acc name info =>
       match to_filtered_symbol name info with
       | .some x => acc.push x
       | .none => acc)
     return .ok { symbols := names }
-  inspect (args: Commands.Inspect): MainM (CR Commands.InspectResult) := do
+  lib_inspect (args: Commands.LibInspect): MainM (CR Commands.LibInspectResult) := do
     let state ← get
     let env ← Lean.MonadEnv.getEnv
     let name := str_to_name args.name
@@ -104,11 +93,6 @@ def execute (command: Commands.Command): MainM Lean.Json := do
         value? := ← value?.mapM (λ v => serialize_expression state.options v),
         module? := module?
       }
-  clear (_: Commands.Clear): MainM (CR Commands.ClearResult) := do
-    let state ← get
-    let nTrees := state.proofTrees.size
-    set { state with proofTrees := #[] }
-    return .ok { nTrees := nTrees }
   expr_echo (args: Commands.ExprEcho): MainM (CR Commands.ExprEchoResult) := do
     let state ← get
     let env ← Lean.MonadEnv.getEnv
@@ -126,6 +110,23 @@ def execute (command: Commands.Command): MainM Lean.Json := do
           }
         catch exception =>
           return .error $ errorI "typing" (← exception.toMessageData.toString)
+  options_set (args: Commands.OptionsSet): MainM (CR Commands.OptionsSetResult) := do
+    let state ← get
+    let options := state.options
+    set { state with
+      options := {
+        -- FIXME: This should be replaced with something more elegant
+        printJsonPretty := args.printJsonPretty?.getD options.printJsonPretty,
+        printExprPretty := args.printExprPretty?.getD options.printExprPretty,
+        printExprAST := args.printExprAST?.getD options.printExprAST,
+        proofVariableDelta := args.proofVariableDelta?.getD options.proofVariableDelta,
+        printAuxDecls := args.printAuxDecls?.getD options.printAuxDecls,
+        printImplementationDetailHyps := args.printImplementationDetailHyps?.getD options.printImplementationDetailHyps
+      }
+    }
+    return .ok {  }
+  options_print (_: Commands.OptionsPrint): MainM (CR Commands.OptionsPrintResult) := do
+    return .ok (← get).options
   proof_start (args: Commands.ProofStart): MainM (CR Commands.ProofStartResult) := do
     let state ← get
     let env ← Lean.MonadEnv.getEnv

Pantograph/Commands.lean

@@ -11,6 +11,9 @@ namespace Pantograph.Commands
 
 /-- Main Option structure, placed here to avoid name collision -/
 structure Options where
+  -- When false, suppress newlines in Json objects. Useful for machine-to-machine interaction.
+  -- This should be  false` by default to avoid any surprises with parsing.
+  printJsonPretty: Bool    := false
   -- When enabled, pretty print every expression
   printExprPretty: Bool    := true
   -- When enabled, print the raw AST of expressions
@@ -74,45 +77,10 @@ structure InteractionError where
 
 --- Individual command and return types ---
 
-/-- Set options; See `Options` struct above for meanings -/
-structure OptionsSet where
-  printExprPretty?: Option Bool
-  printExprAST?: Option Bool
-  proofVariableDelta?: Option Bool
-  printAuxDecls?: Option Bool
-  printImplementationDetailHyps?: Option Bool
-  deriving Lean.FromJson
-structure OptionsSetResult where
-  deriving Lean.ToJson
 
-structure OptionsPrint where
+structure Reset where
   deriving Lean.FromJson
-abbrev OptionsPrintResult := Options
-
-
--- Print all symbols in environment
-structure Catalog where
-  deriving Lean.FromJson
-structure CatalogResult where
-  symbols: Array String
-  deriving Lean.ToJson
-
--- Print the type of a symbol
-structure Inspect where
-  name: String
-  -- If true/false, show/hide the value expressions; By default definitions
-  -- values are shown and theorem values are hidden.
-  value?: Option Bool := .some false
-  deriving Lean.FromJson
-structure InspectResult where
-  type: Expression
-  value?: Option Expression := .none
-  module?: Option String
-  deriving Lean.ToJson
-
-structure Clear where
-  deriving Lean.FromJson
-structure ClearResult where
+structure ResetResult where
   nTrees: Nat
   deriving Lean.ToJson
 
@@ -125,6 +93,40 @@ structure ExprEchoResult where
   type: Expression
   deriving Lean.ToJson
 
+-- Print all symbols in environment
+structure LibCatalog where
+  deriving Lean.FromJson
+structure LibCatalogResult where
+  symbols: Array String
+  deriving Lean.ToJson
+-- Print the type of a symbol
+structure LibInspect where
+  name: String
+  -- If true/false, show/hide the value expressions; By default definitions
+  -- values are shown and theorem values are hidden.
+  value?: Option Bool := .some false
+  deriving Lean.FromJson
+structure LibInspectResult where
+  type: Expression
+  value?: Option Expression := .none
+  module?: Option String
+  deriving Lean.ToJson
+
+/-- Set options; See `Options` struct above for meanings -/
+structure OptionsSet where
+  printJsonPretty?: Option Bool
+  printExprPretty?: Option Bool
+  printExprAST?: Option Bool
+  proofVariableDelta?: Option Bool
+  printAuxDecls?: Option Bool
+  printImplementationDetailHyps?: Option Bool
+  deriving Lean.FromJson
+structure OptionsSetResult where
+  deriving Lean.ToJson
+structure OptionsPrint where
+  deriving Lean.FromJson
+abbrev OptionsPrintResult := Options
+
 structure ProofStart where
   name: Option String     -- Identifier of the proof
   -- Only one of the fields below may be populated.
@@ -134,7 +136,6 @@ structure ProofStart where
 structure ProofStartResult where
   treeId: Nat := 0 -- Proof tree id
   deriving Lean.ToJson
-
 structure ProofTactic where
   -- Identifiers for tree, state, and goal
   treeId: Nat
@@ -150,7 +151,6 @@ structure ProofTacticResult where
   -- Existence of this field shows failure
   tacticErrors?: Option (Array String) := .none
   deriving Lean.ToJson
-
 structure ProofPrintTree where
   treeId: Nat
   deriving Lean.FromJson

Pantograph/Version.lean

@@ -1,5 +1,5 @@
 namespace Pantograph
 
-def version := "0.2.1"
+def version := "0.2.2"
 
 end Pantograph

README.md

@@ -42,13 +42,13 @@ also accept lean options of the form `--key=value` e.g. `--pp.raw=true`.
 Example: (~5k symbols)
 ```
 $ build/bin/Pantograph Init
-catalog
-inspect {"name": "Nat.le_add_left"}
+lib.catalog
+lib.inspect {"name": "Nat.le_add_left"}
 ```
 Example with `mathlib4` (~90k symbols, may stack overflow, see troubleshooting)
 ```
 $ lake env build/bin/Pantograph Mathlib.Analysis.Seminorm
-catalog
+lib.catalog
 ```
 Example proving a theorem: (alternatively use `proof.start {"copyFrom": "Nat.add_comm"}`) to prime the proof
 ```
@@ -65,15 +65,15 @@ where the application of `assumption` should lead to a failure.
 ## Commands
 
 See `Pantograph/Commands.lean` for a description of the parameters and return values in Json.
-- `options.set { key: value, ... }`: Set one or more options (not Lean options; those
-  have to be set via command line arguments.)
-- `options.print`: Display the current set of options
-- `catalog`: Display a list of all safe Lean symbols in the current context
-- `inspect {"name": <name>, "value": <bool>}`: Show the type and package of a
+- `reset`: Delete all cached expressions and proof trees
+- `expr.echo {"expr": <expr>}`: Determine the type of an expression and round-trip it
+- `lib.catalog`: Display a list of all safe Lean symbols in the current context
+- `lib.inspect {"name": <name>, "value": <bool>}`: Show the type and package of a
   given symbol; If value flag is set, the value is printed or hidden. By default
   only the values of definitions are printed.
-- `clear`: Delete all cached expressions and proof trees
-- `expr.echo {"expr": <expr>}`: Determine the type of an expression and round-trip it
+- `options.set { key: value, ... }`: Set one or more options (not Lean options; those
+  have to be set via command line arguments.), for options, see `Pantograph/Commands.lean`
+- `options.print`: Display the current set of options
 - `proof.start {["name": <name>], ["expr": <expr>], ["copyFrom": <symbol>]}`: Start a new proof state from a given expression or symbol
 - `proof.tactic {"treeId": <id>, "stateId": <id>, "goalId": <id>, "tactic": string}`: Execute a tactic on a given proof state
 - `proof.printTree {"treeId": <id>}`: Print the topological structure of a proof tree

Test/Integration.lean

@@ -47,20 +47,20 @@ def test_option_print : IO LSpec.TestSeq :=
   let module? := Option.some "Init.Data.Nat.Basic"
   let options: Commands.Options := {}
   subroutine_runner [
-    subroutine_step "inspect"
+    subroutine_step "lib.inspect"
       [("name", .str "Nat.add_one")]
      (Lean.toJson ({
        type := { pp? }, module? }:
-      Commands.InspectResult)),
+      Commands.LibInspectResult)),
     subroutine_step "options.set"
       [("printExprAST", .bool true)]
      (Lean.toJson ({ }:
       Commands.OptionsSetResult)),
-    subroutine_step "inspect"
+    subroutine_step "lib.inspect"
       [("name", .str "Nat.add_one")]
      (Lean.toJson ({
        type := { pp?, sexp? }, module? }:
-      Commands.InspectResult)),
+      Commands.LibInspectResult)),
     subroutine_step "options.print"
       []
      (Lean.toJson ({ options with printExprAST := true }: