Auto merge of #1139 - kichristensen:DisableManOnWindows, r=Diggsey

Disable man support on Windows

Disable man support on Windows.

closes #637

Author: bors

src/rustup-cli/rustup_mode.rs

@@ -113,7 +113,7 @@ pub fn main() -> Result<()> {
 }
 
 pub fn cli() -> App<'static, 'static> {
-    App::new("rustup")
+    let mut app = App::new("rustup")
         .version(common::version())
         .about("The Rust toolchain installer")
         .after_help(RUSTUP_HELP)
@@ -330,52 +330,57 @@ pub fn cli() -> App<'static, 'static> {
                  .long("std")
                  .help("Standard library API documentation"))
             .group(ArgGroup::with_name("page")
-                 .args(&["book", "std"])))
-        .subcommand(SubCommand::with_name("man")
+                 .args(&["book", "std"])));
+    
+    if cfg!(not(target_os = "windows")) {
+        app = app
+            .subcommand(SubCommand::with_name("man")
                     .about("View the man page for a given command")
                     .arg(Arg::with_name("command")
                          .required(true))
                     .arg(Arg::with_name("toolchain")
                          .long("toolchain")
-                         .takes_value(true)))
-        .subcommand(SubCommand::with_name("self")
-            .about("Modify the rustup installation")
-            .setting(AppSettings::VersionlessSubcommands)
-            .setting(AppSettings::DeriveDisplayOrder)
-            .setting(AppSettings::SubcommandRequiredElseHelp)
-            .subcommand(SubCommand::with_name("update")
-                .about("Download and install updates to rustup"))
-            .subcommand(SubCommand::with_name("uninstall")
-                .about("Uninstall rustup.")
-                .arg(Arg::with_name("no-prompt")
-                     .short("y")))
-            .subcommand(SubCommand::with_name("upgrade-data")
-                .about("Upgrade the internal data format.")))
-        .subcommand(SubCommand::with_name("telemetry")
-            .about("rustup telemetry commands")
-            .setting(AppSettings::Hidden)
-            .setting(AppSettings::VersionlessSubcommands)
-            .setting(AppSettings::DeriveDisplayOrder)
-            .setting(AppSettings::SubcommandRequiredElseHelp)
-            .subcommand(SubCommand::with_name("enable")
-                            .about("Enable rustup telemetry"))
-            .subcommand(SubCommand::with_name("disable")
-                            .about("Disable rustup telemetry"))
-            .subcommand(SubCommand::with_name("analyze")
-                            .about("Analyze stored telemetry")))
-        .subcommand(SubCommand::with_name("set")
-            .about("Alter rustup settings")
-            .setting(AppSettings::SubcommandRequiredElseHelp)
-            .subcommand(SubCommand::with_name("default-host")
-                .about("The triple used to identify toolchains when not specified")
-                .arg(Arg::with_name("host_triple")
-                    .required(true))))
-        .subcommand(SubCommand::with_name("completions")
-            .about("Generate completion scripts for your shell")
-            .after_help(COMPLETIONS_HELP)
-            .setting(AppSettings::ArgRequiredElseHelp)
-            .arg(Arg::with_name("shell")
-                .possible_values(&Shell::variants())))
+                         .takes_value(true)));
+    }
+    
+    app.subcommand(SubCommand::with_name("self")
+        .about("Modify the rustup installation")
+        .setting(AppSettings::VersionlessSubcommands)
+        .setting(AppSettings::DeriveDisplayOrder)
+        .setting(AppSettings::SubcommandRequiredElseHelp)
+        .subcommand(SubCommand::with_name("update")
+            .about("Download and install updates to rustup"))
+        .subcommand(SubCommand::with_name("uninstall")
+            .about("Uninstall rustup.")
+            .arg(Arg::with_name("no-prompt")
+                    .short("y")))
+        .subcommand(SubCommand::with_name("upgrade-data")
+            .about("Upgrade the internal data format.")))
+    .subcommand(SubCommand::with_name("telemetry")
+        .about("rustup telemetry commands")
+        .setting(AppSettings::Hidden)
+        .setting(AppSettings::VersionlessSubcommands)
+        .setting(AppSettings::DeriveDisplayOrder)
+        .setting(AppSettings::SubcommandRequiredElseHelp)
+        .subcommand(SubCommand::with_name("enable")
+                        .about("Enable rustup telemetry"))
+        .subcommand(SubCommand::with_name("disable")
+                        .about("Disable rustup telemetry"))
+        .subcommand(SubCommand::with_name("analyze")
+                        .about("Analyze stored telemetry")))
+    .subcommand(SubCommand::with_name("set")
+        .about("Alter rustup settings")
+        .setting(AppSettings::SubcommandRequiredElseHelp)
+        .subcommand(SubCommand::with_name("default-host")
+            .about("The triple used to identify toolchains when not specified")
+            .arg(Arg::with_name("host_triple")
+                .required(true))))
+    .subcommand(SubCommand::with_name("completions")
+        .about("Generate completion scripts for your shell")
+        .after_help(COMPLETIONS_HELP)
+        .setting(AppSettings::ArgRequiredElseHelp)
+        .arg(Arg::with_name("shell")
+            .possible_values(&Shell::variants())))
 }
 
 fn maybe_upgrade_data(cfg: &Cfg, m: &ArgMatches) -> Result<bool> {