[erl-frontend] Started ErlangTranslator

Summary:
Rebar3.capture now calls into ErlangTranslator to obtain Sil. For now,
ErlangTranslator does nothing interesting.

Reviewed By: skcho

Differential Revision: D28261799

fbshipit-source-id: 0603db671

infer/src/erlang/ErlangTranslator.ml

@@ -0,0 +1,26 @@
+(*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *)
+
+open! IStd
+module Ast = ErlangAst
+
+let to_source_and_cfg module_ =
+  let source =
+    let extract_path = function
+      | {Ast.line= _; simple_form= File {path}} ->
+          Some path
+      | _ ->
+          None
+    in
+    match List.find_map ~f:extract_path module_ with
+    | None ->
+        SourceFile.invalid __FILE__
+    | Some path ->
+        SourceFile.create path
+  in
+  let cfg = (* TODO *) Cfg.create () in
+  (source, cfg)

infer/src/erlang/ErlangTranslator.mli

@@ -0,0 +1,10 @@
+(*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *)
+
+open! IStd
+
+val to_source_and_cfg : ErlangAst.module_ -> SourceFile.t * Cfg.t

infer/src/integration/Rebar3.ml

@@ -16,9 +16,14 @@ let run_rebar result_dir args =
 
 let parse_and_store result_dir =
   let process json =
-    let _ast = ErlangJsonParser.to_module json in
-    (* TODO: Translate to Sil, load source, call [SourceFiles.add]. *)
-    ()
+    match ErlangJsonParser.to_module json with
+    | None ->
+        false
+    | Some ast ->
+        let source_file, cfg = ErlangTranslator.to_source_and_cfg ast in
+        let tenv = (* TODO: types *) Tenv.Global in
+        SourceFiles.add source_file cfg tenv None ;
+        true
   in
   let log error = L.progress "E: %s@." error in
   let read_one_ast json_file =
@@ -26,7 +31,7 @@ let parse_and_store result_dir =
       L.progress "P: parsing %s@." json_file ;
       match Utils.read_safe_json_file json_file with
       | Ok json ->
-          process json
+          if not (process json) then L.debug Capture Verbose "Failed to parse %s@." json_file
       | Error error ->
           log error )
   in