1 files changed, 19 insertions, 23 deletions

diff --git a/vendor/mdbook/src/main.rs b/vendor/mdbook/src/main.rs
index 35562e64b..3e576c5b5 100644
--- a/vendor/mdbook/src/main.rs
+++ b/vendor/mdbook/src/main.rs
@@ -5,7 +5,7 @@ extern crate log;
 
 use anyhow::anyhow;
 use chrono::Local;
-use clap::{App, AppSettings, Arg, ArgMatches};
+use clap::{Arg, ArgMatches, Command};
 use clap_complete::Shell;
 use env_logger::Builder;
 use log::LevelFilter;
@@ -13,7 +13,7 @@ use mdbook::utils;
 use std::env;
 use std::ffi::OsStr;
 use std::io::Write;
-use std::path::{Path, PathBuf};
+use std::path::PathBuf;
 
 mod cmd;
 
@@ -22,10 +22,10 @@ const VERSION: &str = concat!("v", crate_version!());
 fn main() {
     init_logger();
 
-    let app = create_clap_app();
+    let command = create_clap_command();
 
-    // Check which subcomamnd the user ran...
-    let res = match app.get_matches().subcommand() {
+    // Check which subcommand the user ran...
+    let res = match command.get_matches().subcommand() {
         Some(("init", sub_matches)) => cmd::init::execute(sub_matches),
         Some(("build", sub_matches)) => cmd::build::execute(sub_matches),
         Some(("clean", sub_matches)) => cmd::clean::execute(sub_matches),
@@ -35,15 +35,13 @@ fn main() {
         Some(("serve", sub_matches)) => cmd::serve::execute(sub_matches),
         Some(("test", sub_matches)) => cmd::test::execute(sub_matches),
         Some(("completions", sub_matches)) => (|| {
-            let shell: Shell = sub_matches
-                .value_of("shell")
-                .ok_or_else(|| anyhow!("Shell name missing."))?
-                .parse()
-                .map_err(|s| anyhow!("Invalid shell: {}", s))?;
+            let shell = sub_matches
+                .get_one::<Shell>("shell")
+                .ok_or_else(|| anyhow!("Shell name missing."))?;
 
-            let mut complete_app = create_clap_app();
+            let mut complete_app = create_clap_command();
             clap_complete::generate(
-                shell,
+                *shell,
                 &mut complete_app,
                 "mdbook",
                 &mut std::io::stdout().lock(),
@@ -61,13 +59,13 @@ fn main() {
 }
 
 /// Create a list of valid arguments and sub-commands
-fn create_clap_app() -> App<'static> {
-    let app = App::new(crate_name!())
+fn create_clap_command() -> Command {
+    let app = Command::new(crate_name!())
         .about(crate_description!())
         .author("Mathieu David <mathieudavid@mathieudavid.org>")
         .version(VERSION)
-        .setting(AppSettings::PropagateVersion)
-        .setting(AppSettings::ArgRequiredElseHelp)
+        .propagate_version(true)
+        .arg_required_else_help(true)
         .after_help(
             "For more information about a specific command, try `mdbook <command> --help`\n\
              The source code for mdBook is available at: https://github.com/rust-lang/mdBook",
@@ -77,12 +75,11 @@ fn create_clap_app() -> App<'static> {
         .subcommand(cmd::test::make_subcommand())
         .subcommand(cmd::clean::make_subcommand())
         .subcommand(
-            App::new("completions")
+            Command::new("completions")
                 .about("Generate shell completions for your shell to stdout")
                 .arg(
                     Arg::new("shell")
-                        .takes_value(true)
-                        .possible_values(Shell::possible_values())
+                        .value_parser(clap::value_parser!(Shell))
                         .help("the shell to generate completions for")
                         .value_name("SHELL")
                         .required(true),
@@ -124,11 +121,10 @@ fn init_logger() {
 }
 
 fn get_book_dir(args: &ArgMatches) -> PathBuf {
-    if let Some(dir) = args.value_of("dir") {
+    if let Some(p) = args.get_one::<PathBuf>("dir") {
         // Check if path is relative from current dir, or absolute...
-        let p = Path::new(dir);
         if p.is_relative() {
-            env::current_dir().unwrap().join(dir)
+            env::current_dir().unwrap().join(p)
         } else {
             p.to_path_buf()
         }
@@ -146,5 +142,5 @@ fn open<P: AsRef<OsStr>>(path: P) {
 
 #[test]
 fn verify_app() {
-    create_clap_app().debug_assert();
+    create_clap_command().debug_assert();
 }