cli: Allow specifying multiple component or target values in one argument

Author: jplatte

src/cli/rustup_mode.rs

@@ -318,15 +318,17 @@ pub fn cli() -> App<'static, 'static> {
                                 .long("component")
                                 .short("c")
                                 .takes_value(true)
-                                .multiple(true),
+                                .multiple(true)
+                                .use_delimiter(true),
                         )
                         .arg(
                             Arg::with_name("targets")
                                 .help("Add specific targets on installation")
                                 .long("target")
                                 .short("t")
                                 .takes_value(true)
-                                .multiple(true),
+                                .multiple(true)
+                                .use_delimiter(true),
                         )
                         .arg(
                             Arg::with_name("force")

src/cli/setup_mode.rs

@@ -67,15 +67,17 @@ pub fn main() -> Result<()> {
                 .long("component")
                 .short("c")
                 .takes_value(true)
-                .multiple(true),
+                .multiple(true)
+                .use_delimiter(true),
         )
         .arg(
             Arg::with_name("targets")
                 .help("Target name to also install")
                 .long("target")
                 .short("target")
                 .takes_value(true)
-                .multiple(true),
+                .multiple(true)
+                .use_delimiter(true),
         )
         .arg(
             Arg::with_name("no-modify-path")