From 8b49600673765a56b5d6414cf580d4ac63778eb3 Mon Sep 17 00:00:00 2001
From: josh rotenberg <joshrotenberg@gmail.com>
Date: Tue, 10 May 2022 11:19:23 -0700
Subject: [PATCH] call first_chapter

---
 src/cmd/watch.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/cmd/watch.rs b/src/cmd/watch.rs
index 78ae1968..2effd29f 100644
--- a/src/cmd/watch.rs
+++ b/src/cmd/watch.rs
@@ -1,3 +1,4 @@
+use crate::first_chapter;
 use crate::{get_book_dir, open};
 use clap::{arg, App, Arg, ArgMatches};
 use mdbook::errors::Result;
@@ -45,7 +46,12 @@ pub fn execute(args: &ArgMatches) -> Result<()> {
 
     if args.is_present("open") {
         book.build()?;
-        open(book.build_dir_for("html").join("index.html"));
+        match first_chapter(&book)
+            .map(|path| book.build_dir_for("html").join(path).with_extension("html"))
+        {
+            Some(path) if Path::new(&path).exists() => open(path),
+            _ => warn!("No chapter available to open"),
+        }
     }
 
     trigger_on_change(&book, |paths, book_dir| {