src/librustc_incremental/persist/util.rs

   1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 use rustc::ty;
  12 use std::fs;
  13 use std::path::PathBuf;
  14
  15 pub fn dep_graph_path<'tcx>(tcx: &ty::TyCtxt<'tcx>) -> Option<PathBuf> {
  16     // For now, just save/load dep-graph from
  17     // directory/dep_graph.rbml
  18     tcx.sess.opts.incremental.as_ref().and_then(|incr_dir| {
  19         match fs::create_dir_all(&incr_dir){
  20             Ok(()) => {}
  21             Err(err) => {
  22                 tcx.sess.err(
  23                     &format!("could not create the directory `{}`: {}",
  24                              incr_dir.display(), err));
  25                 return None;
  26             }
  27         }
  28
  29         Some(incr_dir.join("dep_graph.rbml"))
  30     })
  31 }
  32