Parse dune files in a versioned way.
We read the first 3 tokens of a dune file and use it recognize if the file was generated using jbuilder or dune Signed-off-by: Rudi Grinberg <rudi.grinberg@gmail.com>
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@ -45,7 +45,36 @@ let of_sexp =
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]
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let load fname =
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Sexp.Of_sexp.parse of_sexp Univ_map.empty (Io.Sexp.load ~mode:Single fname)
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Io.with_lexbuf_from_file fname ~f:(fun lexbuf ->
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let (version_loc, version) =
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let bad_dune_file = "Unable to read (dune x.y ..) line file" in
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let rec loop = function
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| [_; _; _] as a -> List.rev a
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| acc ->
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begin match (Sexp.Lexer.token lexbuf : Sexp.Lexer.Token.t) with
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| Eof ->
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Loc.fail (Loc.in_file (Path.to_string fname)) "%s" bad_dune_file
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| t -> loop (t :: acc)
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end
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in
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match loop [] with
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| [Lparen; Atom (A "dune"); Atom s] ->
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(Sexp.Loc.of_lexbuf lexbuf, Sexp.Atom.to_string s)
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| _ ->
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Loc.fail
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{ start = Lexing.lexeme_start_p lexbuf
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; stop = Lexing.lexeme_end_p lexbuf
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} "%s" bad_dune_file
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in
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match version with
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| "1" ->
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Sexp.Of_sexp.parse of_sexp Univ_map.empty
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(Io.Sexp.load ~lexer:Sexp.Lexer.jbuild_token ~mode:Single fname)
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| "2" ->
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Sexp.Of_sexp.parse of_sexp Univ_map.empty
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(Io.Sexp.load ~lexer:Sexp.Lexer.token ~mode:Single fname)
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| _ ->
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Loc.fail version_loc "unknown version %S" version)
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let gen confs =
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let sexps =
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