fleshed out init command

assets/01-introduction.default.md

@@ -0,0 +1,7 @@
+---
+title = "Introduction"
+---
+
+# Introduction
+
+This is my cool book, I made it all by myself (along with [mkbook](https://github.com/hamaluik/mkbook), that is!)

assets/mkbook.default.toml

@@ -0,0 +1,6 @@
+title = "My Cool Book"
+author = "Anonymous"
+url = ""
+description = """
+A **short** but sweet description of _My Cool Book_.
+"""

src/cli.rs

@@ -5,13 +5,13 @@ pub fn build_cli() -> App<'static, 'static> {
         .version(env!("CARGO_PKG_VERSION"))
         .author(env!("CARGO_PKG_AUTHORS"))
         .about(env!("CARGO_PKG_DESCRIPTION"))
-        .subcommand(SubCommand::with_name("init")
-            .about("initialized the directory structi")
-        )
         .subcommand(SubCommand::with_name("init")
             .about("initialize a mkbook directory tree")
             .arg(Arg::with_name("directory")
-                .help("an optional directory to initialize into (defaults to the CWD)")
+                .short("d")
+                .long("directory")
+                .default_value("src")
+                .help("an optional directory to initialize into")
             )
         )
         .subcommand(SubCommand::with_name("build")

src/main.rs

@@ -10,6 +10,8 @@ use askama::Template;
 pub const STYLESHEET: &'static str = include_str!(concat!(env!("OUT_DIR"), "/style.css"));
 pub const ASSET_FAVICON: &'static [u8] = include_bytes!(concat!(env!("CARGO_MANIFEST_DIR"), "/assets/favicon.ico"));
 pub const ASSET_ICONS: &'static [u8] = include_bytes!(concat!(env!("CARGO_MANIFEST_DIR"), "/assets/icons.svg"));
+pub const ASSET_DEFAULT_MKBOOK: &'static [u8] = include_bytes!(concat!(env!("CARGO_MANIFEST_DIR"), "/assets/mkbook.default.toml"));
+pub const ASSET_DEFAULT_INTRODUCTION: &'static [u8] = include_bytes!(concat!(env!("CARGO_MANIFEST_DIR"), "/assets/01-introduction.default.md"));
 
 pub const SYNTAX_TOML: &'static str = include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/assets/syntaxes/TOML.sublime-syntax"));
 pub const SYNTAX_HAXE: &'static str = include_str!(concat!(env!("CARGO_MANIFEST_DIR"), "/assets/syntaxes/haxe.sublime-syntax"));
@@ -228,8 +230,27 @@ fn format_page<W: io::Write>(book: &Book, frontmatter: FrontMatter, chapters: &V
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let matches = cli::build_cli().get_matches();
 
-    if let Some(_submatches) = matches.subcommand_matches("init") {
-        unimplemented!()
+    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());
+        fs::create_dir_all(&dest)?;
+        let book_toml_path = dest.join("mkbook.toml");
+        fs::write(&book_toml_path, ASSET_DEFAULT_MKBOOK)?;
+        let intro_path = dest.join("01-introduction.md");
+        fs::write(&intro_path, ASSET_DEFAULT_INTRODUCTION)?;
+        println!("Done!");
+
+        println!("You can now build your book by running:");
+        if dest.display().to_string() != "src" {
+            println!("mkbook build -i {}", dest.display());
+        }
+        else {
+            println!("mkbook build");
+        }
+
+        Ok(())
     }
     else if let Some(submatches) = matches.subcommand_matches("build") {
         let src = submatches.value_of("in").expect("in value");