Fix auto-detection of syntax, use a polymorphic variant to ensure all functions were updated.

src/bin/cli.ml

@@ -45,7 +45,7 @@ let source n =
   let open Arg in
   let info =
     let docv = "SOURCE_FILE" in
-    let doc = "$(docv) is the path to the .ligo file of the contract." in
+    let doc = "$(docv) is the path to the .ligo or .mligo file of the contract." in
     info ~docv ~doc [] in
   required @@ pos n (some string) None info
 
@@ -85,7 +85,7 @@ let compile_file =
     toplevel @@
     let%bind contract =
       trace (simple_info "compiling contract to michelson") @@
-      Ligo.Run.compile_contract_file source entry_point syntax in
+      Ligo.Run.compile_contract_file source entry_point (Syntax_name syntax) in
     Format.printf "%s\n" contract ;
     ok ()
   in
@@ -100,7 +100,7 @@ let compile_parameter =
     toplevel @@
     let%bind value =
       trace (simple_error "compile-input") @@
-      Ligo.Run.compile_contract_parameter source entry_point expression syntax in
+      Ligo.Run.compile_contract_parameter source entry_point expression (Syntax_name syntax) in
     Format.printf "%s\n" value;
     ok ()
   in
@@ -115,7 +115,7 @@ let compile_storage =
     toplevel @@
     let%bind value =
       trace (simple_error "compile-storage") @@
-      Ligo.Run.compile_contract_storage source entry_point expression syntax in
+      Ligo.Run.compile_contract_storage source entry_point expression (Syntax_name syntax) in
     Format.printf "%s\n" value;
     ok ()
   in
@@ -129,7 +129,7 @@ let dry_run =
   let f source entry_point storage input amount syntax =
     toplevel @@
     let%bind output =
-      Ligo.Run.run_contract ~amount source entry_point storage input syntax in
+      Ligo.Run.run_contract ~amount source entry_point storage input (Syntax_name syntax) in
     Format.printf "%a\n" Ast_simplified.PP.expression output ;
     ok ()
   in
@@ -143,7 +143,7 @@ let run_function =
   let f source entry_point parameter amount syntax =
     toplevel @@
     let%bind output =
-      Ligo.Run.run_function ~amount source entry_point parameter syntax in
+      Ligo.Run.run_function ~amount source entry_point parameter (Syntax_name syntax) in
     Format.printf "%a\n" Ast_simplified.PP.expression output ;
     ok ()
   in
@@ -157,7 +157,7 @@ let evaluate_value =
   let f source entry_point amount syntax =
     toplevel @@
     let%bind output =
-      Ligo.Run.evaluate_value ~amount source entry_point syntax in
+      Ligo.Run.evaluate_value ~amount source entry_point (Syntax_name syntax) in
     Format.printf "%a\n" Ast_simplified.PP.expression output ;
     ok ()
   in

src/main/run_source.ml

@@ -95,40 +95,54 @@ let parsify_expression_ligodity = fun source ->
     Simplify.Ligodity.simpl_expression raw in
   ok simplified
 
-let detect_syntax = fun syntax source ->
-  if String.equal syntax "auto" then
-    begin
-      let subr s n =
-        String.sub s (String.length s - n) n in
-      if String.equal (subr source 5) ".ligo"
-      then ok "pascaligo"
-      else if String.equal (subr source 6) ".mligo"
-      then ok "cameligo"
-      else simple_fail "cannot auto-detect syntax, pleas use -s name_of_syntax"
-    end
-  else
-    ok syntax
+type s_syntax = Syntax_name of string
+type v_syntax =  [`pascaligo | `cameligo ]
 
-let parsify = fun syntax source ->
-  let%bind syntax = detect_syntax syntax source in
-  let%bind parsify = match syntax with
-    | "pascaligo" -> ok parsify_pascaligo
-    | "cameligo" -> ok parsify_ligodity
-    | _ -> simple_fail "unrecognized parser"
+let syntax_to_variant : s_syntax -> string option -> v_syntax result =
+  fun syntax source_filename ->
+  let subr s n =
+    String.sub s (String.length s - n) n in
+  let endswith s suffix =
+    let suffixlen = String.length suffix in
+    (  String.length s >= suffixlen
+       && String.equal (subr s suffixlen) suffix)
   in
-  parsify source
+  match syntax with
+    Syntax_name syntax ->
+    begin
+      if String.equal syntax "auto" then
+        begin
+          match source_filename with
+          | Some source_filename
+            when endswith source_filename ".ligo"
+            -> ok `pascaligo
+          | Some source_filename
+            when endswith source_filename ".mligo"
+            -> ok `cameligo
+          | _ -> simple_fail "cannot auto-detect syntax, pleas use -s name_of_syntax"
+        end
+      else if String.equal syntax "pascaligo" then ok `pascaligo
+      else if String.equal syntax "cameligo" then ok `cameligo
+      else simple_fail "unrecognized parser"
+    end
+
+let parsify = fun (syntax : v_syntax) source_filename ->
+  let%bind parsify = match syntax with
+    | `pascaligo -> ok parsify_pascaligo
+    | `cameligo -> ok parsify_ligodity
+  in
+  parsify source_filename
 
 let parsify_expression = fun syntax source ->
-  let%bind syntax = detect_syntax syntax source in
   let%bind parsify = match syntax with
-    | "pascaligo" -> ok parsify_expression_pascaligo
-    | "cameligo" -> ok parsify_expression_ligodity
-    | _ -> simple_fail "unrecognized parser"
+    | `pascaligo -> ok parsify_expression_pascaligo
+    | `cameligo -> ok parsify_expression_ligodity
   in
   parsify source
 
-let compile_contract_file : string -> string -> string -> string result = fun source entry_point syntax ->
-  let%bind simplified = parsify syntax source in
+let compile_contract_file : string -> string -> s_syntax -> string result = fun source_filename entry_point syntax ->
+  let%bind syntax = syntax_to_variant syntax (Some source_filename) in
+  let%bind simplified = parsify syntax source_filename in
   let%bind () =
     assert_entry_point_defined simplified entry_point in
   let%bind typed =
@@ -144,9 +158,10 @@ let compile_contract_file : string -> string -> string -> string result = fun so
     Format.asprintf "%a" Michelson.pp_stripped michelson in
   ok str
 
-let compile_contract_parameter : string -> string -> string -> string -> string result = fun source entry_point expression syntax ->
+let compile_contract_parameter : string -> string -> string -> s_syntax -> string result = fun source_filename entry_point expression syntax ->
+  let%bind syntax = syntax_to_variant syntax (Some source_filename) in
   let%bind (program , parameter_tv) =
-    let%bind simplified = parsify syntax source in
+    let%bind simplified = parsify syntax source_filename in
     let%bind () =
       assert_entry_point_defined simplified entry_point in
     let%bind typed =
@@ -182,9 +197,10 @@ let compile_contract_parameter : string -> string -> string -> string -> string
   ok expr
 
 
-let compile_contract_storage : string -> string -> string -> string -> string result = fun source entry_point expression syntax ->
+let compile_contract_storage : string -> string -> string -> s_syntax -> string result = fun source_filename entry_point expression syntax ->
+  let%bind syntax = syntax_to_variant syntax (Some source_filename) in
   let%bind (program , storage_tv) =
-    let%bind simplified = parsify syntax source in
+    let%bind simplified = parsify syntax source_filename in
     let%bind () =
       assert_entry_point_defined simplified entry_point in
     let%bind typed =
@@ -220,8 +236,8 @@ let compile_contract_storage : string -> string -> string -> string -> string re
   ok expr
 
 let type_file ?(debug_simplify = false) ?(debug_typed = false)
-    syntax (path:string) : Ast_typed.program result =
-  let%bind simpl = parsify syntax path in
+    syntax (source_filename:string) : Ast_typed.program result =
+  let%bind simpl = parsify syntax source_filename in
   (if debug_simplify then
      Format.(printf "Simplified : %a\n%!" Ast_simplified.PP.program simpl)
   ) ;
@@ -233,9 +249,10 @@ let type_file ?(debug_simplify = false) ?(debug_typed = false)
     )) ;
   ok typed
 
-let run_contract ?amount source entry_point storage input syntax =
+let run_contract ?amount source_filename entry_point storage input syntax =
+  let%bind syntax = syntax_to_variant syntax (Some source_filename) in
   let%bind typed =
-    type_file syntax source in
+    type_file syntax source_filename in
   let%bind storage_simpl =
     parsify_expression syntax storage in
   let%bind input_simpl =
@@ -246,9 +263,10 @@ let run_contract ?amount source entry_point storage input syntax =
     (make_options ?amount ()) in
   Run_simplified.run_simplityped ~options typed entry_point (Ast_simplified.e_pair storage_simpl input_simpl)
 
-let run_function ?amount source entry_point parameter syntax =
+let run_function ?amount source_filename entry_point parameter syntax =
+  let%bind syntax = syntax_to_variant syntax (Some source_filename) in
   let%bind typed =
-    type_file syntax source in
+    type_file syntax source_filename in
   let%bind parameter' =
     parsify_expression syntax parameter in
   let options =
@@ -257,9 +275,10 @@ let run_function ?amount source entry_point parameter syntax =
     (make_options ?amount ()) in
   Run_simplified.run_simplityped ~options typed entry_point parameter'
 
-let evaluate_value ?amount source entry_point syntax =
+let evaluate_value ?amount source_filename entry_point syntax =
+  let%bind syntax = syntax_to_variant syntax (Some source_filename) in
   let%bind typed =
-    type_file syntax source in
+    type_file syntax source_filename in
   let options =
     let open Proto_alpha_utils.Memory_proto_alpha in
     let amount = Option.bind (fun amount -> Alpha_context.Tez.of_string amount) amount in

src/test/bin_tests.ml

@@ -4,7 +4,7 @@ open Test_helpers
 
 let compile_contract_basic () : unit result =
   let%bind _ =
-    compile_contract_file "./contracts/dispatch-counter.ligo" "main" "pascaligo"
+    compile_contract_file "./contracts/dispatch-counter.ligo" "main" (Syntax_name "pascaligo")
   in
   ok ()
 

src/test/coase_tests.ml

@@ -4,7 +4,7 @@ open Trace
 open Ligo.Run
 open Test_helpers
 
-let type_file = type_file "pascaligo"
+let type_file = type_file `pascaligo
 
 let get_program =
   let s = ref None in

src/test/heap_tests.ml

@@ -2,7 +2,7 @@ open Trace
 open Ligo.Run
 open Test_helpers
 
-let type_file = type_file "pascaligo"
+let type_file = type_file `pascaligo
 
 let get_program =
   let s = ref None in

src/test/integration_tests.ml

@@ -4,8 +4,8 @@ open Test_helpers
 
 open Ast_simplified.Combinators
 
-let mtype_file ?debug_simplify ?debug_typed = type_file ?debug_simplify ?debug_typed "cameligo"
-let type_file = type_file "pascaligo"
+let mtype_file ?debug_simplify ?debug_typed = type_file ?debug_simplify ?debug_typed `cameligo
+let type_file = type_file `pascaligo
 
 let type_alias () : unit result =
   let%bind program = type_file "./contracts/type-alias.ligo" in

src/test/vote_tests.ml

@@ -7,7 +7,7 @@ let get_program =
   fun () -> match !s with
     | Some s -> ok s
     | None -> (
-        let%bind program = type_file "cameligo" "./contracts/vote.mligo" in
+        let%bind program = type_file `cameligo "./contracts/vote.mligo" in
         s := Some program ;
         ok program
       )