Add --path option to 'rustup override set'

Same as --path in 'rustup override unset'

Author: pickfire

src/rustup-cli/rustup_mode.rs

@@ -7,7 +7,7 @@ use rustup_dist::manifest::Component;
 use rustup_dist::dist::{PartialTargetTriple, PartialToolchainDesc, TargetTriple};
 use rustup_utils::utils::{self, ExitCode};
 use self_update;
-use std::path::Path;
+use std::path::{Path, PathBuf};
 use std::process::{self, Command};
 use std::iter;
 use std::error::Error;
@@ -316,6 +316,12 @@ pub fn cli() -> App<'static, 'static> {
                             Arg::with_name("toolchain")
                                 .help(TOOLCHAIN_ARG_HELP)
                                 .required(true),
+                        )
+                        .arg(
+                            Arg::with_name("path")
+                                .long("path")
+                                .takes_value(true)
+                                .help("Path to the directory"),
                         ),
                 )
                 .subcommand(
@@ -899,7 +905,12 @@ fn override_add(cfg: &Cfg, m: &ArgMatches) -> Result<()> {
         None
     };
 
-    toolchain.make_override(&utils::current_dir()?)?;
+    let path = if let Some(path) = m.value_of("path") {
+        PathBuf::from(path)
+    } else {
+        utils::current_dir()?
+    };
+    toolchain.make_override(&path)?;
 
     if let Some(status) = status {
         println!("");
@@ -928,8 +939,8 @@ fn override_remove(cfg: &Cfg, m: &ArgMatches) -> Result<()> {
         }
         list
     } else {
-        if m.is_present("path") {
-            vec![m.value_of("path").unwrap().to_string()]
+        if let Some(path) = m.value_of("path") {
+            vec![path.to_string()]
         } else {
             vec![utils::current_dir()?.to_str().unwrap().to_string()]
         }