Handle more EPIPE situations

In order to be easier for scripts to use us, until we define a
proper CLI API for that, handle EPIPE situations on all the list
type subcommands as well as the show subcommands.

Fixes rust-lang#1730

Signed-off-by: Daniel Silverstone <[email protected]>

Author: kinnison

src/cli/rustup_mode.rs

@@ -49,25 +49,25 @@ pub fn main() -> Result<()> {
         ("default", Some(m)) => default_(cfg, m)?,
         ("toolchain", Some(c)) => match c.subcommand() {
             ("install", Some(m)) => update(cfg, m)?,
-            ("list", Some(_)) => common::list_toolchains(cfg)?,
+            ("list", Some(_)) => handle_epipe(common::list_toolchains(cfg))?,
             ("link", Some(m)) => toolchain_link(cfg, m)?,
             ("uninstall", Some(m)) => toolchain_remove(cfg, m)?,
             (_, _) => unreachable!(),
         },
         ("target", Some(c)) => match c.subcommand() {
-            ("list", Some(m)) => target_list(cfg, m)?,
+            ("list", Some(m)) => handle_epipe(target_list(cfg, m))?,
             ("add", Some(m)) => target_add(cfg, m)?,
             ("remove", Some(m)) => target_remove(cfg, m)?,
             (_, _) => unreachable!(),
         },
         ("component", Some(c)) => match c.subcommand() {
-            ("list", Some(m)) => component_list(cfg, m)?,
+            ("list", Some(m)) => handle_epipe(component_list(cfg, m))?,
             ("add", Some(m)) => component_add(cfg, m)?,
             ("remove", Some(m)) => component_remove(cfg, m)?,
             (_, _) => unreachable!(),
         },
         ("override", Some(c)) => match c.subcommand() {
-            ("list", Some(_)) => common::list_overrides(cfg)?,
+            ("list", Some(_)) => handle_epipe(common::list_overrides(cfg))?,
             ("set", Some(m)) => override_add(cfg, m)?,
             ("unset", Some(m)) => override_remove(cfg, m)?,
             (_, _) => unreachable!(),