bump Cargo to 0.37

Author: RalfJung

Cargo.toml

@@ -9,7 +9,7 @@ repository = "https://github.com/sfackler/cargo-tree"
 readme = "README.md"
 
 [dependencies]
-cargo = "0.36"
+cargo = "0.37"
 env_logger = "0.6"
 failure = "0.1"
 petgraph = "0.4"

src/main.rs

@@ -16,6 +16,7 @@ use std::collections::hash_map::Entry;
 use std::collections::{HashMap, HashSet};
 use std::path::PathBuf;
 use std::str::{self, FromStr};
+use std::rc::Rc;
 use structopt::clap::AppSettings;
 use structopt::StructOpt;
 
@@ -108,6 +109,9 @@ struct Args {
     #[structopt(long = "locked")]
     /// Require Cargo.lock is up to date
     locked: bool,
+    #[structopt(long = "offline")]
+    /// Do not access the network
+    offline: bool,
     #[structopt(short = "Z", value_name = "FLAG")]
     /// Unstable (nightly-only) flags to Cargo
     unstable_flags: Vec<String>,
@@ -184,6 +188,7 @@ fn real_main(args: Args, config: &mut Config) -> CliResult {
         &args.color,
         args.frozen,
         args.locked,
+        args.offline,
         &args.target_dir,
         &args.unstable_flags,
     )?;
@@ -322,7 +327,7 @@ fn resolve<'a, 'cfg>(
 
     let method = Method::Required {
         dev_deps: !no_dev_dependencies,
-        features: &features,
+        features: Rc::new(features),
         all_features,
         uses_default_features: !no_default_features,
     };
@@ -335,7 +340,6 @@ fn resolve<'a, 'cfg>(
         None,
         &[],
         true,
-        true,
     )?;
     Ok((packages, resolve))
 }