unlink file before writing it, and don't fail if it's not here

Signed-off-by: Pierre Habouzit <madcoder@debian.org>

diff --git a/tools/cpkg2c.mll b/tools/cpkg2c.mll
index c0a0453..129004b 100644 (file)
--- a/tools/cpkg2c.mll
+++ b/tools/cpkg2c.mll
@@ -631,7 +631,7 @@ int luaopen_%s(lua_State *L)
     let lexbuf = L.from_channel (open_in file) in
     let l      = (startchunk cLine file lexbuf) in
     if Sys.argv.(3) = "-o" then (
-      Unix.unlink Sys.argv.(4);
+      try Unix.unlink Sys.argv.(4) with _ -> ();
       let ob = open_out_gen [ Open_trunc ; Open_wronly; Open_creat ] 0o444 Sys.argv.(4) in
       match Sys.argv.(1) with
       | "-h" -> warn ob; do_h ob l; close_out ob