Copy system environment into initial env, and also add %stdlib.

[goals.git] / src / main.ml

diff --git a/src/main.ml b/src/main.ml
index 30ba31f..2b74a4f 100644 (file)
--- a/src/main.ml
+++ b/src/main.ml
@@ -19,37 +19,66 @@
 
 open Printf
 
-let usage =
-  "\
-goals: Build software.
+open Utils
 
- goals [-f Goalfile] ['var = value' ...] [target ...]
+(* See comment in parser.mly. *)
+let () =
+  Parser.lexer_read := Some Lexer.read;
+  Parser.eval_substitute := Some Eval.substitute
 
-For detailed help see goals(1).
+let main () =
+  (* Change directory (-C option). *)
+  Sys.chdir Cmdline.directory;
 
-Options:"
+  (* 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 *)
 
-let main () =
-  (* Command line arguments. *)
-  let filename = ref "Goalfile" in
-
-  let argspec = [
-    "-f",        Arg.Set_string filename,
-                 "filename Set name of Goalfile";
-    "--file",    Arg.Set_string filename,
-                 "filename Set name of Goalfile";
-  ] in
-  let argspec = Arg.align argspec in
-  let args = ref [] in
-  let anon_fun s = args := s :: !args in
-  Arg.parse argspec anon_fun usage;
-
-  (*let args = List.rev !args in*)
-  let filename = !filename in
+  (* Parse the prelude. *)
+  let env =
+    if Cmdline.use_prelude then
+      Parse.parse_goalfile env Cmdline.prelude_gl_file
+    else env in
 
   (* Parse the input file. *)
-  let file = Parse.parse_from_file filename 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_expr "commandline" expr in
+        Ast.Env.add name expr env
+    ) env Cmdline.anon_vars in
+
+  (* Parse the target expressions. *)
+  let targets = List.map (Parse.parse_expr "commandline") Cmdline.targets in
+
+  (* If no target was set on the command line, use "all ()". *)
+  let targets =
+    if targets <> [] then targets
+    else [Ast.ECall (Ast.noloc, "all", [])] in
+
+  if Cmdline.debug_flag then
+    Ast.print_env stderr env;
 
-  Ast.print_file stdout file
+  (* Run the target expressions. *)
+  Run.run_targets env targets
 
-let () = main ()
+let () =
+  try main ()
+  with
+    Failure msg | Sys_error msg ->
+      prerr_endline ("error: " ^ msg); exit 1