added watch command with optional auto-reload

5 years ago · 8b25596a8a
parent 5b0cc03ac8
commit 8b25596a8a
22 changed files with 802 additions and 202 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@ -169,6 +169,23 @@ name = "byteorder"
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@ -221,6 +238,16 @@ dependencies = [
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@ -283,6 +310,27 @@ name = "fake-simd"
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@ -299,6 +347,37 @@ name = "fnv"
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@ -315,6 +394,16 @@ dependencies = [
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@ -328,6 +417,11 @@ dependencies = [
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@ -341,11 +435,56 @@ dependencies = [
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@ -389,6 +528,7 @@ version = "0.4.8"
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@ -396,6 +536,11 @@ name = "maplit"
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@ -409,6 +554,46 @@ dependencies = [
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@ -417,11 +602,25 @@ dependencies = [
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@ -433,6 +632,24 @@ dependencies = [
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@ -490,6 +707,11 @@ name = "peeking_take_while"
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@ -547,6 +769,11 @@ dependencies = [
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@ -584,6 +811,43 @@ dependencies = [
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@ -692,6 +956,16 @@ name = "shlex"
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@ -817,6 +1091,22 @@ name = "unchecked-index"
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@ -837,6 +1127,16 @@ name = "unicode_categories"
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@ -875,6 +1185,11 @@ dependencies = [
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--- a/Cargo.toml
+++ b/Cargo.toml
@ -28,6 +28,10 @@ serde = { version = "1.0", features = ["derive"] }
 toml = "0.5"
 lazy_static = "1.4"
 chrono = "0.4"
 notify = "4.0"
 ws = "0.9"
 fern = { version = "0.5", features = ["colored"] }
 log = { version = "0.4", features = ["max_level_debug", "release_max_level_info", "std", "serde"] }
 [build-dependencies]
 sass-rs = "0.2"
--- a/docs-src/01-introduction.md
+++ b/docs-src/01-introduction.md
@ -35,6 +35,7 @@ SUBCOMMANDS:
    build    build the book
    help     Prints this message or the help of the given subcommand(s)
    init     initialize a mkbook directory tree
    watch    build the book and continually rebuild whenever the source changes
 ```
 ### The Init Command
@ -77,3 +78,24 @@ OPTIONS:
    -i, --in <in>      an optional directory to take the book sources from [default: src]
    -o, --out <out>    an optional directory to render the contents into [default: book]
 ```
 ### The Watch Command
 The watch command is basically the same as the `build` command, however after building it continues to monitor the source directory and if _any_ changes are made (a file is saved, renamed, removed, created, etc), the entire book is re-built. In the future, this will hopefully be smarter but for now it just the whole thing at once. Stop watching using <kbd>Ctrl+C</kbd> or sending `SIGINT`.
 ```sh
 $ mkbook build --help
 mkbook-watch 
 build the book and continually rebuild whenever the source changes
 USAGE:
    mkbook watch [OPTIONS]
 FLAGS:
    -h, --help       Prints help information
    -V, --version    Prints version information
 OPTIONS:
    -i, --in <in>      an optional directory to take the book sources from [default: src]
    -o, --out <out>    an optional directory to render the contents into [default: book]
 ```
--- a/docs/01-introduction/index.html
+++ b/docs/01-introduction/index.html
@ -12,7 +12,7 @@
        <meta property="og:url" content="https://hamaluik.github.io/mkbook//01-introduction/index.html" />
        <meta property="book:author" content="Kenton Hamaluik" />
-        <meta property="book:release_date" content="2019-12-01T18:55:05.215513238+00:00" />
+        <meta property="book:release_date" content="2019-12-02T20:05:16.402897505+00:00" />
    </head>
    <body>
@ -124,6 +124,7 @@
 </span><span style="color:#d3d0c8;">    </span><span style="color:#6699cc;">build</span><span style="color:#d3d0c8;">    build the book
 </span><span style="color:#d3d0c8;">    </span><span style="color:#66cccc;">help</span><span style="color:#d3d0c8;">     Prints this message or the help of the given subcommand(s)
 </span><span style="color:#d3d0c8;">    </span><span style="color:#6699cc;">init</span><span style="color:#d3d0c8;">     initialize a mkbook directory tree
 </span><span style="color:#d3d0c8;">    </span><span style="color:#6699cc;">watch</span><span style="color:#d3d0c8;">    build the book and continually rebuild whenever the source changes
 </span></pre>
 <h3><a href="#the-init-command" aria-hidden="true" class="anchor" id="headerthe-init-command"></a>The Init Command</h3>
 <p>The init command is a tool to help you get started, and will create an initial <code>README.md</code> file and a stub of your first chapter.</p>
@ -160,6 +161,24 @@
 </span><span style="color:#d3d0c8;">    </span><span style="color:#6699cc;">-i,</span><span style="color:#f2777a;"> --in </span><span style="color:#d3d0c8;">&lt;in&gt;      an optional directory to take the book sources from </span><span style="color:#cc99cc;">[</span><span style="color:#d3d0c8;">default: src</span><span style="color:#cc99cc;">]
 </span><span style="color:#d3d0c8;">    </span><span style="color:#6699cc;">-o,</span><span style="color:#f2777a;"> --out </span><span style="color:#d3d0c8;">&lt;out&gt;    an optional directory to render the contents into </span><span style="color:#cc99cc;">[</span><span style="color:#d3d0c8;">default: book</span><span style="color:#cc99cc;">]
 </span></pre>
 <h3><a href="#the-watch-command" aria-hidden="true" class="anchor" id="headerthe-watch-command"></a>The Watch Command</h3>
 <p>The watch command is basically the same as the <code>build</code> command, however after building it continues to monitor the source directory and if <em>any</em> changes are made (a file is saved, renamed, removed, created, etc), the entire book is re-built. In the future, this will hopefully be smarter but for now it just the whole thing at once. Stop watching using <kbd>Ctrl+C</kbd> or sending <code>SIGINT</code>.</p>
 <pre style="background-color:#2d2d2d;">
 <span style="color:#6699cc;">$</span><span style="color:#d3d0c8;"> mkbook build</span><span style="color:#f2777a;"> --help
 </span><span style="color:#6699cc;">mkbook-watch 
 </span><span style="color:#6699cc;">build</span><span style="color:#d3d0c8;"> the book and continually rebuild whenever the source changes
 </span><span style="color:#d3d0c8;">
 </span><span style="color:#6699cc;">USAGE:
 </span><span style="color:#d3d0c8;">    </span><span style="color:#6699cc;">mkbook</span><span style="color:#d3d0c8;"> watch </span><span style="color:#cc99cc;">[</span><span style="color:#d3d0c8;">OPTIONS</span><span style="color:#cc99cc;">]
 </span><span style="color:#d3d0c8;">
 </span><span style="color:#6699cc;">FLAGS:
 </span><span style="color:#d3d0c8;">    </span><span style="color:#6699cc;">-h,</span><span style="color:#f2777a;"> --help</span><span style="color:#d3d0c8;">       Prints help information
 </span><span style="color:#d3d0c8;">    </span><span style="color:#6699cc;">-V,</span><span style="color:#f2777a;"> --version</span><span style="color:#d3d0c8;">    Prints version information
 </span><span style="color:#d3d0c8;">
 </span><span style="color:#6699cc;">OPTIONS:
 </span><span style="color:#d3d0c8;">    </span><span style="color:#6699cc;">-i,</span><span style="color:#f2777a;"> --in </span><span style="color:#d3d0c8;">&lt;in&gt;      an optional directory to take the book sources from </span><span style="color:#cc99cc;">[</span><span style="color:#d3d0c8;">default: src</span><span style="color:#cc99cc;">]
 </span><span style="color:#d3d0c8;">    </span><span style="color:#6699cc;">-o,</span><span style="color:#f2777a;"> --out </span><span style="color:#d3d0c8;">&lt;out&gt;    an optional directory to render the contents into </span><span style="color:#cc99cc;">[</span><span style="color:#d3d0c8;">default: book</span><span style="color:#cc99cc;">]
 </span></pre>
@ -176,5 +195,6 @@
        <footer><p>&copy; 2019 Kenton Hamaluik</p></footer>
        </article>
    </body>
 </html>
--- a/docs/02-markdown/01-commonmark.html
+++ b/docs/02-markdown/01-commonmark.html
@ -12,7 +12,7 @@
        <meta property="og:url" content="https://hamaluik.github.io/mkbook//02-markdown/01-commonmark.html" />
        <meta property="book:author" content="Kenton Hamaluik" />
-        <meta property="book:release_date" content="2019-12-01T18:55:05.215513238+00:00" />
+        <meta property="book:release_date" content="2019-12-02T20:05:16.402897505+00:00" />
    </head>
    <body>
@ -164,5 +164,6 @@
        <footer><p>&copy; 2019 Kenton Hamaluik</p></footer>
        </article>
    </body>
 </html>
--- a/docs/02-markdown/02-syntax-highlighting.html
+++ b/docs/02-markdown/02-syntax-highlighting.html
@ -12,7 +12,7 @@
        <meta property="og:url" content="https://hamaluik.github.io/mkbook//02-markdown/02-syntax-highlighting.html" />
        <meta property="book:author" content="Kenton Hamaluik" />
-        <meta property="book:release_date" content="2019-12-01T18:55:05.215513238+00:00" />
+        <meta property="book:release_date" content="2019-12-02T20:05:16.402897505+00:00" />
    </head>
    <body>
@ -625,5 +625,6 @@
        <footer><p>&copy; 2019 Kenton Hamaluik</p></footer>
        </article>
    </body>
 </html>
--- a/docs/02-markdown/03-plantuml-diagrams.html
+++ b/docs/02-markdown/03-plantuml-diagrams.html
@ -12,7 +12,7 @@
        <meta property="og:url" content="https://hamaluik.github.io/mkbook//02-markdown/03-plantuml-diagrams.html" />
        <meta property="book:author" content="Kenton Hamaluik" />
-        <meta property="book:release_date" content="2019-12-01T18:55:05.215513238+00:00" />
+        <meta property="book:release_date" content="2019-12-02T20:05:16.402897505+00:00" />
    </head>
    <body>
@ -137,5 +137,6 @@
        <footer><p>&copy; 2019 Kenton Hamaluik</p></footer>
        </article>
    </body>
 </html>
--- a/docs/02-markdown/04-katex-formulas.html
+++ b/docs/02-markdown/04-katex-formulas.html
@ -12,7 +12,7 @@
        <meta property="og:url" content="https://hamaluik.github.io/mkbook//02-markdown/04-katex-formulas.html" />
        <meta property="book:author" content="Kenton Hamaluik" />
-        <meta property="book:release_date" content="2019-12-01T18:55:05.215513238+00:00" />
+        <meta property="book:release_date" content="2019-12-02T20:05:16.402897505+00:00" />
        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/katex@0.11.1/dist/katex.min.css" integrity="sha384-zB1R0rpPzHqg7Kpt0Aljp8JPLqbXI3bhnPWROx27a9N0Ll6ZP/+DiW/UqRcLbRjq" crossorigin="anonymous">
    </head>
    <body>
@ -145,5 +145,6 @@ M834 80h400000v40h-400000z'/></svg></span></span></span><span class="vlist-s">
        <footer><p>&copy; 2019 Kenton Hamaluik</p></footer>
        </article>
    </body>
 </html>
--- a/docs/02-markdown/index.html
+++ b/docs/02-markdown/index.html
@ -12,7 +12,7 @@
        <meta property="og:url" content="https://hamaluik.github.io/mkbook//02-markdown/index.html" />
        <meta property="book:author" content="Kenton Hamaluik" />
-        <meta property="book:release_date" content="2019-12-01T18:55:05.215513238+00:00" />
+        <meta property="book:release_date" content="2019-12-02T20:05:16.402897505+00:00" />
    </head>
    <body>
@ -132,5 +132,6 @@
        <footer><p>&copy; 2019 Kenton Hamaluik</p></footer>
        </article>
    </body>
 </html>
--- a/docs/03-frontmatter/index.html
+++ b/docs/03-frontmatter/index.html
@ -12,7 +12,7 @@
        <meta property="og:url" content="https://hamaluik.github.io/mkbook//03-frontmatter/index.html" />
        <meta property="book:author" content="Kenton Hamaluik" />
-        <meta property="book:release_date" content="2019-12-01T18:55:05.215513238+00:00" />
+        <meta property="book:release_date" content="2019-12-02T20:05:16.402897505+00:00" />
    </head>
    <body>
@ -162,5 +162,6 @@
        <footer><p>&copy; 2019 Kenton Hamaluik</p></footer>
        </article>
    </body>
 </html>
--- a/docs/04-structure/index.html
+++ b/docs/04-structure/index.html
@ -12,7 +12,7 @@
        <meta property="og:url" content="https://hamaluik.github.io/mkbook//04-structure/index.html" />
        <meta property="book:author" content="Kenton Hamaluik" />
-        <meta property="book:release_date" content="2019-12-01T18:55:05.215513238+00:00" />
+        <meta property="book:release_date" content="2019-12-02T20:05:16.402897505+00:00" />
    </head>
    <body>
@ -199,5 +199,6 @@
        <footer><p>&copy; 2019 Kenton Hamaluik</p></footer>
        </article>
    </body>
 </html>
--- a/docs/05-customization/index.html
+++ b/docs/05-customization/index.html
@ -12,7 +12,7 @@
        <meta property="og:url" content="https://hamaluik.github.io/mkbook//05-customization/index.html" />
        <meta property="book:author" content="Kenton Hamaluik" />
-        <meta property="book:release_date" content="2019-12-01T18:55:05.215513238+00:00" />
+        <meta property="book:release_date" content="2019-12-02T20:05:16.402897505+00:00" />
    </head>
    <body>
@ -123,5 +123,6 @@
        <footer><p>&copy; 2019 Kenton Hamaluik</p></footer>
        </article>
    </body>
 </html>
--- a/docs/06-how-it-works/index.html
+++ b/docs/06-how-it-works/index.html
@ -12,7 +12,7 @@
        <meta property="og:url" content="https://hamaluik.github.io/mkbook//06-how-it-works/index.html" />
        <meta property="book:author" content="Kenton Hamaluik" />
-        <meta property="book:release_date" content="2019-12-01T18:55:05.215513238+00:00" />
+        <meta property="book:release_date" content="2019-12-02T20:05:16.402897505+00:00" />
    </head>
    <body>
@ -124,5 +124,6 @@
        <footer><p>&copy; 2019 Kenton Hamaluik</p></footer>
        </article>
    </body>
 </html>
--- a/docs/index.html
+++ b/docs/index.html
@ -14,14 +14,14 @@
 &lt;p&gt;This tool aims to work somewhat similarly to &lt;em&gt;mdbook&lt;&#x2f;em&gt;, but is generally intended to be a more minimal alternative that is customized more towards my needs and desires than anything else.&lt;&#x2f;p&gt;
 " />
        <meta property="book:author" content="Kenton Hamaluik" />
-        <meta property="book:release_date" content="2019-12-01T18:55:05.215513238+00:00" />
+        <meta property="book:release_date" content="2019-12-02T20:05:16.402897505+00:00" />
    </head>
    <body class="toc">
        <header>
            <h1>The mkbook Book</h1>
            <h2>by Kenton Hamaluik</h2>
-            <time datetime="2019-12-01T18:55:05.215513238+00:00">Dec  1, 2019</time>
+            <time datetime="2019-12-02T20:05:16.402897505+00:00">Dec  2, 2019</time>
        </header>
        <article>
            <p><em>mkbook</em> is my simpler alternative to <a href="https://crates.io/crates/mdbook">mdbook</a> which is a great tool, but for which I really dislike some of the decisions they took, such as relying on javascript for highlighting and navigation, and including a lot of bells and whistles such as javascript-based search.</p>
@ -77,5 +77,6 @@
            </ol>
        </nav>
        <footer><p>&copy; 2019 Kenton Hamaluik</p></footer>
    </body>
 </html>
--- a/docs/style.css
+++ b/docs/style.css
--- a/src/cli.rs
+++ b/src/cli.rs
@ -29,4 +29,24 @@ pub fn build_cli() -> App<'static, 'static> {
                .help("an optional directory to render the contents into")
            )
        )
        .subcommand(SubCommand::with_name("watch")
            .about("build the book and continually rebuild whenever the source changes")
            .arg(Arg::with_name("in")
                .short("i")
                .long("in")
                .default_value("src")
                .help("an optional directory to take the book sources from")
            )
            .arg(Arg::with_name("out")
                .short("o")
                .long("out")
                .default_value("book")
                .help("an optional directory to render the contents into")
            )
            .arg(Arg::with_name("reload")
                .short("r")
                .long("reload")
                .help("inject live-reload code so that the page automatically reloads on regeneration")
            )
        )
 }
--- a/src/main.rs
+++ b/src/main.rs
@ -1,7 +1,7 @@
 #[macro_use]
 extern crate lazy_static;
-use std::path::PathBuf;
+use std::path::{PathBuf, Path};
 use std::{fs, io};
 use comrak::ComrakOptions;
 use syntect::{parsing::SyntaxSet, highlighting::{ThemeSet, Theme}};
@ -85,7 +85,7 @@ fn create_katex_inline(src: &str) -> Result<String, Box<dyn std::error::Error>>
        .spawn() {
            Ok(c) => c,
            Err(e) => {
-                eprintln!("[WARNING] failed to launch katex, not rendering math block: {:?}", e);
+                log::warn!("failed to launch katex, not rendering math block: {:?}", e);
                return Ok(format_code("", src)?.output);
            }
        };
@ -95,12 +95,12 @@ fn create_katex_inline(src: &str) -> Result<String, Box<dyn std::error::Error>>
    let output = child.wait_with_output()?;
    if !output.status.success() {
-        eprintln!("failed to generate katex, exit code: {:?}", output.status.code());
+        log::error!("failed to generate katex, exit code: {:?}", output.status.code());
-        eprintln!("katex STDOUT:");
+        log::error!("katex STDOUT:");
-        eprintln!("{}", String::from_utf8_lossy(output.stdout.as_ref()));
+        log::error!("{}", String::from_utf8_lossy(output.stdout.as_ref()));
-        eprintln!("katex STDERR:");
+        log::error!("katex STDERR:");
-        eprintln!("{}", String::from_utf8_lossy(output.stdout.as_ref()));
+        log::error!("{}", String::from_utf8_lossy(output.stdout.as_ref()));
-        eprintln!("/katex output");
+        log::error!("/katex output");
        return Ok(format_code("", src)?.output);
    }
    let rendered: String = String::from_utf8(output.stdout)?;
@ -122,7 +122,7 @@ fn create_plantuml_svg(src: &str) -> Result<String, Box<dyn std::error::Error>>
        .spawn() {
            Ok(c) => c,
            Err(e) => {
-                eprintln!("[WARNING] failed to launch plantuml, not rendering plantuml block: {:?}", e);
+                log::warn!("failed to launch plantuml, not rendering plantuml block: {:?}", e);
                return Ok(format_code("", src)?.output);
            }
        };
@ -132,12 +132,12 @@ fn create_plantuml_svg(src: &str) -> Result<String, Box<dyn std::error::Error>>
    let output = child.wait_with_output()?;
    if !output.status.success() {
-        eprintln!("failed to generate plantuml, exit code: {:?}", output.status.code());
+        log::error!("failed to generate plantuml, exit code: {:?}", output.status.code());
-        eprintln!("plantuml STDOUT:");
+        log::error!("plantuml STDOUT:");
-        eprintln!("{}", String::from_utf8_lossy(output.stdout.as_ref()));
+        log::error!("{}", String::from_utf8_lossy(output.stdout.as_ref()));
-        eprintln!("plantuml STDERR:");
+        log::error!("plantuml STDERR:");
-        eprintln!("{}", String::from_utf8_lossy(output.stdout.as_ref()));
+        log::error!("{}", String::from_utf8_lossy(output.stdout.as_ref()));
-        eprintln!("/plantuml output");
+        log::error!("/plantuml output");
        return Ok(format_code("", src)?.output);
    }
    let svg: String = String::from_utf8(output.stdout)?;
@ -278,15 +278,17 @@ struct IndexTemplate<'a, 'b, 'c> {
    chapters: &'b Vec<Chapter>,
    book_description: &'c str,
    include_katex_css: bool,
    include_reload_script: bool,
 }
-fn generate_index<W: io::Write>(book: &FrontMatter, content: String, include_katex_css: bool, chapters: &Vec<Chapter>, mut output: W) -> Result<(), Box<dyn std::error::Error>> {
+fn generate_index<W: io::Write>(book: &FrontMatter, content: String, include_katex_css: bool, chapters: &Vec<Chapter>, mut output: W, include_reload_script: bool) -> Result<(), Box<dyn std::error::Error>> {
    // fill out our template
    let template = IndexTemplate {
        book,
        chapters,
        book_description: &content,
        include_katex_css,
        include_reload_script,
    };
    // and render!
@ -306,9 +308,10 @@ struct PageTemplate<'a, 'b, 'c, 'd, 'e, 'g> {
    next_chapter: Option<&'e Chapter>,
    book: &'g FrontMatter,
    include_katex_css: bool,
    include_reload_script: bool,
 }
-fn format_page<W: io::Write>(book: &FrontMatter, chapter: &Chapter, chapters: &Vec<Chapter>, prev_chapter: Option<&Chapter>, next_chapter: Option<&Chapter>, content: &str, include_katex_css: bool, mut output: W) -> Result<(), Box<dyn std::error::Error>> {
+fn format_page<W: io::Write>(book: &FrontMatter, chapter: &Chapter, chapters: &Vec<Chapter>, prev_chapter: Option<&Chapter>, next_chapter: Option<&Chapter>, content: &str, include_katex_css: bool, mut output: W, include_reload_script: bool) -> Result<(), Box<dyn std::error::Error>> {
    // fill out our template
    let template = PageTemplate {
        chapter,
@ -318,6 +321,7 @@ fn format_page<W: io::Write>(book: &FrontMatter, chapter: &Chapter, chapters: &V
        next_chapter,
        book,
        include_katex_css,
        include_reload_script,
    };
    // and render!
@ -327,27 +331,278 @@ fn format_page<W: io::Write>(book: &FrontMatter, chapter: &Chapter, chapters: &V
    Ok(())
 }
 fn build<PIn: AsRef<Path>, POut: AsRef<Path>>(src: PIn, dest: POut, include_reload_script: bool) -> Result<(), Box<dyn std::error::Error>> {
    let src = PathBuf::from(src.as_ref());
    let dest = PathBuf::from(dest.as_ref());
    std::fs::create_dir_all(&dest)?;
    // load our book
    let book_readme_path = src.join("README.md");
    let (book_front, book_description) = if book_readme_path.exists() {
        let contents = fs::read_to_string(&book_readme_path)?;
        let (front, contents) = extract_frontmatter(&contents)?;
        (front, contents)
    }
    else {
        let content = String::new();
        (None, content)
    };
    let book_front = FrontMatter::from_root(book_front.unwrap_or_default());
    let FormatResponse { output, include_katex_css } = format_markdown(&book_description)?;
    let book_description = output;
    // load all our chapters
    let mut chapters: Vec<Chapter> = Vec::default();
    for entry in src.read_dir()? {
        let entry = entry?;
        let path = entry.path();
        if entry.file_type()?.is_dir() {
            // try to find a `README.md` file and parse it to get the chapter's title, fall back to the directory
            // name if we can't do that
            let chapter_name = path.file_name().map(std::ffi::OsStr::to_str).flatten().unwrap_or_default();
            let index_path = path.join("README.md");
            let (front, contents) = if index_path.exists() {
                let contents = fs::read_to_string(&index_path)?;
                let (front, contents) = extract_frontmatter(&contents)?;
                let front = front.unwrap_or_default().into_front(&book_front, chapter_name, &format!("{}/index.html", chapter_name));
                (front, contents)
            }
            else {
                (ParsedFrontMatter::default().into_front(&book_front, chapter_name, &format!("{}/index.html", chapter_name)), String::new())
            };
            let mut chapter: Chapter = Chapter {
                front,
                sections: Vec::default(),
                source: path.clone(),
                contents,
            };
            for entry in path.read_dir()? {
                let entry = entry?;
                let path = entry.path();
                if let Some("md") = path.extension().map(std::ffi::OsStr::to_str).flatten() {
                    let name = path.file_stem().map(std::ffi::OsStr::to_str).flatten();
                    if name.is_none() { continue; }
                    let name = name.unwrap();
                    if name == "README" {
                        continue;
                    }
                    let contents = fs::read_to_string(&path)?;
                    let (front, contents) = extract_frontmatter(&contents)?;
                    let front = front.unwrap_or_default().into_front(&book_front, name, &format!("{}/{}.html", chapter_name, name));
                    chapter.sections.push(Chapter {
                        front,
                        sections: Vec::new(),
                        source: path,
                        contents,
                    });
                }
            }
            chapters.push(chapter);
        }
        else if let Some("md") = path.extension().map(std::ffi::OsStr::to_str).flatten() {
            let name = path.file_stem().map(std::ffi::OsStr::to_str).flatten();
            if name.is_none() { continue; }
            let name = name.unwrap();
            if name == "README" {
                continue;
            }
            let contents = fs::read_to_string(&path)?;
            let (front, contents) = extract_frontmatter(&contents)?;
            let front = front.unwrap_or_default().into_front(&book_front, name, &format!("{}/index.html", name));
            chapters.push(Chapter {
                front,
                sections: Vec::new(),
                source: path,
                contents,
            });
        }
    }
    // sort all the chapters
    chapters.sort_by(|a, b| a.front.url.cmp(&b.front.url));
    for chapter in chapters.iter_mut() {
        chapter.sections.sort_by(|a, b| a.front.url.cmp(&b.front.url));
    }
    // generate our index
    let index_out_path = dest.join("index.html");
    let index_out = fs::File::create(&index_out_path)?;
    let index_out = io::BufWriter::new(index_out);
    generate_index(&book_front, book_description, include_katex_css, &chapters, index_out, include_reload_script)?;
    log::info!("Rendered index into `{}`", index_out_path.display());
    // compile markdown and write the actual pages
    let mut prev_chapter = None;
    for (chapter_index, chapter) in chapters.iter().enumerate() {
        // render the index
        let chapter_root = dest.join(chapter.source.file_stem().map(std::ffi::OsStr::to_str).flatten().unwrap());
        let out = chapter_root.join("index.html");
        log::info!("Rendering `{}` into `{}`...", chapter.source.display(), out.display());
        fs::create_dir_all(&chapter_root)?;
        let outfile = fs::File::create(&out)?;
        let outfile = io::BufWriter::new(outfile);
        let FormatResponse { output, include_katex_css } = format_markdown(&chapter.contents)?;
        let next_chapter = 
            if chapter.sections.len() > 0 {
                Some(chapter.sections.iter().nth(0).expect("section 0 exists"))
            }
            else if chapter_index < chapters.len() - 1 {
                Some(chapters.iter().nth(chapter_index + 1).expect("chapter n+1 exists"))
            }
            else {
                None
            };
        format_page(&book_front, &chapter, &chapters, prev_chapter, next_chapter, &output, include_katex_css, outfile, include_reload_script)?;
        prev_chapter = Some(chapter);
        // now the sections
        for (section_index, section) in chapter.sections.iter().enumerate() {
            let name = section.source.file_stem().map(std::ffi::OsStr::to_str).flatten().unwrap();
            let out = chapter_root.join(&format!("{}.html", name));
            log::info!("Rendering `{}` into `{}`...", section.source.display(), out.display());
            let outfile = fs::File::create(&out)?;
            let outfile = io::BufWriter::new(outfile);
            let FormatResponse { output, include_katex_css } = format_markdown(&section.contents)?;
            let next_chapter = if section_index < chapter.sections.len() - 1 {
                Some(chapter.sections.iter().nth(section_index + 1).expect("chapter n+1 exists"))
            }
            else if chapter_index < chapters.len() - 1 {
                Some(chapters.iter().nth(chapter_index + 1).expect("chapter n+1 exists"))
            }
            else {
                None
            };
            format_page(&book_front, &section, &chapters, prev_chapter, next_chapter, &output, include_katex_css, outfile, include_reload_script)?;
            prev_chapter = Some(section);
        }
    }
    // save the assets
    fs::write(dest.join("style.css"), STYLESHEET)?;
    log::info!("Wrote {}", dest.join("style.css").display());
    fs::write(dest.join("favicon.ico"), ASSET_FAVICON)?;
    log::info!("Wrote {}", dest.join("favicon.ico").display());
    fs::write(dest.join("icons.svg"), ASSET_ICONS)?;
    log::info!("Wrote {}", dest.join("icons.svg").display());
    log::info!("Done!");
    Ok(())
 }
 struct ReloadClient {
    sender: std::sync::Arc<ws::Sender>,
    reload: std::sync::Arc<std::sync::atomic::AtomicBool>,
    quitloop: std::sync::Arc<std::sync::atomic::AtomicBool>,
 }
 impl ReloadClient {
    pub fn new(sender: ws::Sender, reload: std::sync::Arc<std::sync::atomic::AtomicBool>) -> ReloadClient {
        ReloadClient {
            sender: std::sync::Arc::new(sender),
            reload,
            quitloop: std::sync::Arc::new(std::sync::atomic::AtomicBool::new(false)),
        }
    }
 }
 impl ws::Handler for ReloadClient {
    fn on_open(&mut self, _: ws::Handshake) -> ws::Result<()> {
        log::info!("reload client connected");
        let out = self.sender.clone();
        let reload = self.reload.clone();
        let quitloop = self.quitloop.clone();
        std::thread::spawn(move || {
            'sendloop: loop {
                let send_reload = reload.load(std::sync::atomic::Ordering::SeqCst);
                if send_reload {
                    log::debug!("sending reload signal...");
                    out.send("reload").expect("can send reload signal");
                    log::debug!(" ok!");
                }
                let quit = quitloop.load(std::sync::atomic::Ordering::SeqCst);
                if quit {
                    break 'sendloop;
                }
                // check at 10 Hz
                std::thread::sleep(std::time::Duration::from_millis(100));
            }
            log::warn!("shutting down reload connection");
            if let Err(e) = out.shutdown() {
                log::error!("failed to shut down reload connection: {:?}", e);
            }
        });
        Ok(())
    }
    fn on_close(&mut self, code: ws::CloseCode, reason: &str) {
        log::debug!("reload connection closed: {:?}: {}", code, reason);
        //self.quitloop.store(true, std::sync::atomic::Ordering::SeqCst);
    }
    fn on_shutdown(&mut self) {
        log::debug!("reload connection shutdown");
        self.quitloop.store(true, std::sync::atomic::Ordering::SeqCst);
    }
 }
 fn main() -> Result<(), Box<dyn std::error::Error>> {
    let matches = cli::build_cli().get_matches();
    use fern::colors::{Color, ColoredLevelConfig};
    let colors_level = ColoredLevelConfig::new()
        .error(Color::Red)
        .warn(Color::Yellow)
        .info(Color::Cyan)
        .debug(Color::Magenta)
        .trace(Color::BrightBlack);
    fern::Dispatch::new()
        .format(move |out, message, record| {
            out.finish(format_args!(
                "[{date}][\x1B[96m{target}\x1B[0m][{level}\x1B[0m] {message}",
                date = chrono::Local::now().format("%Y-%m-%d %H:%M:%S"),
                target = record.target(),
                level = colors_level.color(record.level()),
                message = message,
            ));
        })
        .level_for("ws", log::LevelFilter::Info)
        .chain(std::io::stdout())
        .apply()?;
    if let Some(submatches) = matches.subcommand_matches("init") {
        let dest = submatches.value_of("directory").expect("directory value");
        let dest = PathBuf::from(dest);
-        println!("Initializing a book into {}...", dest.display());
+        log::info!("Initializing a book into {}...", dest.display());
        fs::create_dir_all(&dest)?;
        let book_readme_path = dest.join("README.md");
        fs::write(&book_readme_path, ASSET_DEFAULT_README)?;
        let intro_path = dest.join("01-introduction.md");
        fs::write(&intro_path, ASSET_DEFAULT_INTRODUCTION)?;
-        println!("Done!");
+        log::info!("Done!");
-        println!("You can now build your book by running:");
+        log::info!("You can now build your book by running:");
        if dest.display().to_string() != "src" {
-            println!("mkbook build -i {}", dest.display());
+            log::info!("mkbook build -i {}", dest.display());
        }
        else {
-            println!("mkbook build");
+            log::info!("mkbook build");
        }
        Ok(())
@ -355,179 +610,45 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
    else if let Some(submatches) = matches.subcommand_matches("build") {
        let src = submatches.value_of("in").expect("in value");
        let dest = submatches.value_of("out").expect("out value");
-
+        build(src, dest, false)
-        let src = PathBuf::from(src);
+    }
-        let dest = PathBuf::from(dest);
+    else if let Some(submatches) = matches.subcommand_matches("watch") {
-        std::fs::create_dir_all(&dest)?;
+        let reload_trigger = std::sync::Arc::new(std::sync::atomic::AtomicBool::new(false));
-
+        let do_reload = submatches.is_present("reload");
        // load our book
        let book_readme_path = src.join("README.md");
        let (book_front, book_description) = if book_readme_path.exists() {
            let contents = fs::read_to_string(&book_readme_path)?;
            let (front, contents) = extract_frontmatter(&contents)?;
            (front, contents)
        }
        else {
            let content = String::new();
            (None, content)
        };
        let book_front = FrontMatter::from_root(book_front.unwrap_or_default());
        let FormatResponse { output, include_katex_css } = format_markdown(&book_description)?;
        let book_description = output;
        // load all our chapters
        let mut chapters: Vec<Chapter> = Vec::default();
        for entry in src.read_dir()? {
            let entry = entry?;
            let path = entry.path();
            if entry.file_type()?.is_dir() {
                // try to find a `README.md` file and parse it to get the chapter's title, fall back to the directory
                // name if we can't do that
                let chapter_name = path.file_name().map(std::ffi::OsStr::to_str).flatten().unwrap_or_default();
                let index_path = path.join("README.md");
                let (front, contents) = if index_path.exists() {
                    let contents = fs::read_to_string(&index_path)?;
                    let (front, contents) = extract_frontmatter(&contents)?;
                    let front = front.unwrap_or_default().into_front(&book_front, chapter_name, &format!("{}/index.html", chapter_name));
                    (front, contents)
                }
                else {
                    (ParsedFrontMatter::default().into_front(&book_front, chapter_name, &format!("{}/index.html", chapter_name)), String::new())
                };
                let mut chapter: Chapter = Chapter {
                    front,
                    sections: Vec::default(),
                    source: path.clone(),
                    contents,
                };
                for entry in path.read_dir()? {
                    let entry = entry?;
                    let path = entry.path();
                    if let Some("md") = path.extension().map(std::ffi::OsStr::to_str).flatten() {
                        let name = path.file_stem().map(std::ffi::OsStr::to_str).flatten();
                        if name.is_none() { continue; }
                        let name = name.unwrap();
                        if name == "README" {
                            continue;
                        }
-                        let contents = fs::read_to_string(&path)?;
+        if do_reload {
-                        let (front, contents) = extract_frontmatter(&contents)?;
+            let reload_trigger = reload_trigger.clone();
-                        let front = front.unwrap_or_default().into_front(&book_front, name, &format!("{}/{}.html", chapter_name, name));
+            std::thread::spawn(move || {
-                        chapter.sections.push(Chapter {
+                log::info!("starting livereload service");
-                            front,
+                ws::listen("127.0.0.1:3456", |out| ReloadClient::new(out, reload_trigger.clone())).expect("can launch livereload service");
-                            sections: Vec::new(),
+            });
                            source: path,
                            contents,
                        });
                    }
                }
                chapters.push(chapter);
            }
            else if let Some("md") = path.extension().map(std::ffi::OsStr::to_str).flatten() {
                let name = path.file_stem().map(std::ffi::OsStr::to_str).flatten();
                if name.is_none() { continue; }
                let name = name.unwrap();
                if name == "README" {
                    continue;
                }
                let contents = fs::read_to_string(&path)?;
                let (front, contents) = extract_frontmatter(&contents)?;
                let front = front.unwrap_or_default().into_front(&book_front, name, &format!("{}/index.html", name));
                chapters.push(Chapter {
                    front,
                    sections: Vec::new(),
                    source: path,
                    contents,
                });
            }
        }
        // sort all the chapters
        chapters.sort_by(|a, b| a.front.url.cmp(&b.front.url));
        for chapter in chapters.iter_mut() {
            chapter.sections.sort_by(|a, b| a.front.url.cmp(&b.front.url));
        }
-        // generate our index
+        use notify::{RecommendedWatcher, RecursiveMode, Watcher};
        let index_out_path = dest.join("index.html");
        let index_out = fs::File::create(&index_out_path)?;
        let index_out = io::BufWriter::new(index_out);
        generate_index(&book_front, book_description, include_katex_css, &chapters, index_out)?;
        println!("Rendered index into `{}`", index_out_path.display());
        // compile markdown and write the actual pages
        let mut prev_chapter = None;
        for (chapter_index, chapter) in chapters.iter().enumerate() {
            // render the index
            let chapter_root = dest.join(chapter.source.file_stem().map(std::ffi::OsStr::to_str).flatten().unwrap());
            let out = chapter_root.join("index.html");
            print!("Rendering `{}` into `{}`...", chapter.source.display(), out.display());
            fs::create_dir_all(&chapter_root)?;
            let outfile = fs::File::create(&out)?;
            let outfile = io::BufWriter::new(outfile);
            let FormatResponse { output, include_katex_css } = format_markdown(&chapter.contents)?;
            let next_chapter = 
                if chapter.sections.len() > 0 {
                    Some(chapter.sections.iter().nth(0).expect("section 0 exists"))
                }
                else if chapter_index < chapters.len() - 1 {
                    Some(chapters.iter().nth(chapter_index + 1).expect("chapter n+1 exists"))
                }
                else {
                    None
                };
            format_page(&book_front, &chapter, &chapters, prev_chapter, next_chapter, &output, include_katex_css, outfile)?;
            prev_chapter = Some(chapter);
-            println!(" done!");
+        let src = submatches.value_of("in").expect("in value");
-
+        let dest = submatches.value_of("out").expect("out value");
-            // now the sections
+        build(src, dest, do_reload)?;
-            for (section_index, section) in chapter.sections.iter().enumerate() {
+
-                let name = section.source.file_stem().map(std::ffi::OsStr::to_str).flatten().unwrap();
+        let (tx, rx) = std::sync::mpsc::channel();
-                let out = chapter_root.join(&format!("{}.html", name));
+        let mut watcher: RecommendedWatcher = Watcher::new(tx, std::time::Duration::from_secs(1))?;
-                print!("Rendering `{}` into `{}`...", section.source.display(), out.display());
+        watcher.watch(src, RecursiveMode::Recursive)?;
-    
+
-                let outfile = fs::File::create(&out)?;
+        loop {
-                let outfile = io::BufWriter::new(outfile);
+            match rx.recv() {
-    
+                Ok(notify::DebouncedEvent::NoticeWrite(_)) | Ok(notify::DebouncedEvent::NoticeRemove(_)) => {},
-                let FormatResponse { output, include_katex_css } = format_markdown(&section.contents)?;
+                Ok(_) => {
-
+                    build(src, dest, do_reload)?;
-                let next_chapter = if section_index < chapter.sections.len() - 1 {
+                    reload_trigger.store(true, std::sync::atomic::Ordering::SeqCst);
-                    Some(chapter.sections.iter().nth(section_index + 1).expect("chapter n+1 exists"))
+                    std::thread::sleep(std::time::Duration::from_millis(150));
-                }
+                    reload_trigger.store(false, std::sync::atomic::Ordering::SeqCst);
-                else if chapter_index < chapters.len() - 1 {
+                },
-                    Some(chapters.iter().nth(chapter_index + 1).expect("chapter n+1 exists"))
+                Err(e) => {
                    log::error!("watch error: {:?}", e);
                    return Err(Box::from(e));
                }
                else {
                    None
                };
                format_page(&book_front, &section, &chapters, prev_chapter, next_chapter, &output, include_katex_css, outfile)?;
                prev_chapter = Some(section);
                println!(" done!");
            }
        }
        // save the assets
        fs::write(dest.join("style.css"), STYLESHEET)?;
        println!("Wrote {}", dest.join("style.css").display());
        fs::write(dest.join("favicon.ico"), ASSET_FAVICON)?;
        println!("Wrote {}", dest.join("favicon.ico").display());
        fs::write(dest.join("icons.svg"), ASSET_ICONS)?;
        println!("Wrote {}", dest.join("icons.svg").display());
        println!("Done!");
        Ok(())
    }
    else {
        cli::build_cli().print_long_help()?;
--- a/style/layout.scss
+++ b/style/layout.scss
@ -50,6 +50,7 @@ body {
                font-family: $font-sansserif;
                margin-bottom: 0;
                text-align: right;
                color: #eeeeee;
            }
        }
--- a/style/style.scss
+++ b/style/style.scss
@ -3,5 +3,5 @@
@import 'layout';
@import 'toc';
@import 'icons';
-@import 'darktheme';
+//@import 'darktheme';
@import 'print';
--- a/templates/index.html
+++ b/templates/index.html
@ -42,5 +42,8 @@
            </ol>
        </nav>
        <footer><p>&copy; {{ book.pubdate|year }} {{ book.author }}</p></footer>
        {% if include_reload_script %}
        {% include "reload.html" %}
        {% endif %}
    </body>
 </html>
--- a/templates/page.html
+++ b/templates/page.html
@ -99,5 +99,8 @@
        {% endmatch %}
        <footer><p>&copy; {{ book.pubdate|year }} {{ book.author }}</p></footer>
        </article>
        {% if include_reload_script %}
        {% include "reload.html" %}
        {% endif %}
    </body>
 </html>
--- a/templates/reload.html
+++ b/templates/reload.html
@ -0,0 +1,17 @@
 <script>
    console.info("connecting to reload server...");
    var reloadSocket = new WebSocket("ws://127.0.0.1:3456");
    reloadSocket.onopen = function(event) {
        console.info("connected to reload server");
    };
    reloadSocket.onclose = function(event) {
        console.info("reload server hung up!");
    };
    reloadSocket.onerror = function(event) {
        console.error("reload server connection error:", event);
    };
    reloadSocket.onmessage = function(event) {
        console.info("recieved reload command");
        window.location.reload();
    };
 </script>