fix(cli): align rustup show's --verbose behavior with rustup show active-toolchain

Author: rami3l

src/cli/rustup_mode.rs

@@ -1045,8 +1045,11 @@ fn show(cfg: &Cfg<'_>, verbose: bool) -> Result<utils::ExitCode> {
                     &active_reason,
                 )?;
                 writeln!(t.lock(), "name: {}", active_toolchain.name())?;
-                writeln!(t.lock(), "compiler: {}", active_toolchain.rustc_version())?;
                 writeln!(t.lock(), "active because: {}", active_reason)?;
+                if verbose {
+                    writeln!(t.lock(), "compiler: {}", active_toolchain.rustc_version())?;
+                    writeln!(t.lock(), "path: {}", active_toolchain.path().display())?;
+                }
 
                 // show installed targets for the active toolchain
                 writeln!(t.lock(), "installed targets:")?;

tests/suite/cli_rustup.rs

@@ -661,7 +661,6 @@ nightly-{0} (active, default)
 active toolchain
 ----------------
 name: nightly-{0}
-compiler: 1.3.0 (hash-nightly-2)
 active because: it's the default toolchain
 installed targets:
   {0}
@@ -735,7 +734,6 @@ nightly-{0} (active, default)
 active toolchain
 ----------------
 name: nightly-{0}
-compiler: 1.3.0 (hash-nightly-2)
 active because: it's the default toolchain
 installed targets:
   {0}
@@ -774,7 +772,6 @@ nightly-{0} (active, default)
 active toolchain
 ----------------
 name: nightly-{0}
-compiler: 1.3.0 (xxxx-nightly-2)
 active because: it's the default toolchain
 installed targets:
   {1}
@@ -831,7 +828,6 @@ nightly-{0} (active, default)
 active toolchain
 ----------------
 name: nightly-{0}
-compiler: 1.3.0 (xxxx-nightly-2)
 active because: it's the default toolchain
 installed targets:
   {1}
@@ -1139,7 +1135,6 @@ nightly-{0} (active, default)
 active toolchain
 ----------------
 name: nightly-{0}
-compiler: 1.3.0 (hash-nightly-2)
 active because: overridden by environment variable RUSTUP_TOOLCHAIN
 installed targets:
   {0}
@@ -1227,11 +1222,17 @@ nightly-2015-01-01-{0}
 active toolchain
 ----------------
 name: nightly-{0}
-compiler: 1.3.0 (hash-nightly-2)
 active because: it's the default toolchain
+compiler: 1.3.0 (hash-nightly-2)
+path: {2}
 installed targets:
   {0}
-"
+",
+                config
+                    .rustupdir
+                    .join("toolchains")
+                    .join(for_host!("nightly-{0}"))
+                    .display()
             ),
             r"",
         )