Split implementation into dependency analysis and traversal.

[goals.git] / src / main.ml

diff --git a/src/main.ml b/src/main.ml
index 6546fd5..ba4a195 100644 (file)
--- a/src/main.ml
+++ b/src/main.ml
@@ -19,44 +19,77 @@
 
 open Printf
 
+open Utils
+
+(* See comment in parser.mly. *)
+let () =
+  Parser.lexer_read := Some Lexer.read;
+  Parser.eval_substitute := Some Eval.substitute
+
 let main () =
+  (* Handle the command line. *)
+  let anon_vars, targets = Cmdline.parse () in
+
   (* Change directory (-C option). *)
-  Sys.chdir Cmdline.directory;
+  Sys.chdir (Cmdline.directory ());
+
+  (* Create the initial environment, containing the system environment
+   * and a few other standard strings.
+   *)
+  let env =
+    Array.fold_left (
+      fun env environ ->
+        let k, v = split "=" environ in
+        Ast.Env.add k (Ast.EConstant (Ast.noloc, Ast.CString v)) env
+    ) Ast.Env.empty (Unix.environment ()) in
+  let env =
+    Ast.Env.add "stdlib"
+      (Ast.EConstant (Ast.noloc, Ast.CString Cmdline.stdlibdir))
+      env in
+  (*let env =
+    if Cmdline.debug_flag then Ast.Env.add "debug" (Ast.EConstant (noloc, Ast.CBool true)) env else env in *)
 
   (* Parse the prelude. *)
   let env =
-    if Cmdline.use_prelude then
-      Parse.parse_goalfile Ast.Env.empty Cmdline.prelude_file
-    else
-      Ast.Env.empty in
+    if Cmdline.use_prelude () then
+      Parse.parse_goalfile env Cmdline.prelude_gl_file
+    else env in
 
   (* Parse the input file. *)
-  let env = Parse.parse_goalfile env Cmdline.input_file in
+  let env = Parse.parse_goalfile env (Cmdline.input_file ()) in
 
   (* Parse the command line assignments. *)
   let env =
     List.fold_left (
       fun env (name, expr) ->
-        let expr = Parse.parse_cli_expr expr in
+        let expr = Parse.parse_expr "commandline" expr in
         Ast.Env.add name expr env
-    ) env Cmdline.anon_vars in
+    ) env anon_vars in
 
   (* Parse the target expressions. *)
-  let targets = List.map Parse.parse_cli_expr Cmdline.targets in
+  let targets = List.map (Parse.parse_expr "commandline") targets in
 
   (* If no target was set on the command line, use "all ()". *)
   let targets =
     if targets <> [] then targets
-    else [Ast.ECallGoal (Ast.noloc, "all", [])] in
+    else [Ast.ECall (Ast.noloc, "all", [])] in
 
-  if Cmdline.debug_flag then
+  if Cmdline.debug_flag () then
     Ast.print_env stderr env;
 
-  (* Evaluate the target expressions in turn. *)
-  Eval.evaluate_targets env targets
+  (* Construct the dependency DAG with the root(s) being the targets. *)
+  let dag = Deps.create env targets in
+
+  (* Run the jobs. *)
+  let state = Deps.new_state dag Run.goal_runner Run.exists_runner in
+  let next_job () = Deps.next_job state in
+  let retire_job job = Deps.retire_job state job in
+  let string_of_job job = Deps.string_of_job job in
+  Jobs.run next_job retire_job string_of_job
 
 let () =
   try main ()
   with
-    Failure msg | Sys_error msg ->
-      prerr_endline ("error: " ^ msg); exit 1
+  | Failure msg | Sys_error msg ->
+     prerr_endline ("*** error: " ^ msg);
+     exit 1