Big clean-up, reduced the unwrap's to 2 in the library part! Closes #36 The unwraps where replaced with more diverse error messages #14

book-example/src/cli/init.md

@@ -36,7 +36,7 @@ by appending a path to the command:
 mdbook init path/to/book
 ```
 
-#### --theme
+## --theme
 
 When you use the `--theme` argument, the default theme will be copied into a directory
 called `theme` in your source directory so that you can modify it.

src/book/bookconfig.rs

@@ -8,6 +8,7 @@ use std::path::{Path, PathBuf};
 pub struct BookConfig {
     pub title: String,
     pub author: String,
+    root: PathBuf,
     dest: PathBuf,
     src: PathBuf,
     pub indent_spaces: i32,
@@ -16,10 +17,11 @@ pub struct BookConfig {
 
 
 impl BookConfig {
-    pub fn new() -> Self {
+    pub fn new(root: &Path) -> Self {
         BookConfig {
             title: String::new(),
             author: String::new(),
+            root: root.to_owned(),
             dest: PathBuf::from("book"),
             src: PathBuf::from("src"),
             indent_spaces: 4,               // indentation used for SUMMARY.md
@@ -42,32 +44,50 @@ impl BookConfig {
 
         debug!("[*]: Reading config");
         let mut data = String::new();
-        config_file.read_to_string(&mut data).unwrap();
+
+        // Just return if an error occured.
+        // I would like to propagate the error, but I have to return `&self`
+        match config_file.read_to_string(&mut data) {
+            Err(_) => return self,
+            _ => {},
+        }
 
         // Convert to JSON
-        let config = Json::from_str(&data).unwrap();
+        if let Ok(config) = Json::from_str(&data) {
+            // Extract data
 
-        // Extract data
+            debug!("[*]: Extracting data from config");
+            // Title & author
+            if let Some(a) = config.find_path(&["title"]) { self.title = a.to_string().replace("\"", "") }
+            if let Some(a) = config.find_path(&["author"]) { self.author = a.to_string().replace("\"", "") }
 
-        debug!("[*]: Extracting data from config");
+            // Destination
-        // Title & author
+            if let Some(a) = config.find_path(&["dest"]) {
-        if let Some(a) = config.find_path(&["title"]) { self.title = a.to_string().replace("\"", "") }
+                let dest = PathBuf::from(&a.to_string().replace("\"", ""));
-        if let Some(a) = config.find_path(&["author"]) { self.author = a.to_string().replace("\"", "") }
 
-        // Destination
+                // If path is relative make it absolute from the parent directory of src
-        if let Some(a) = config.find_path(&["dest"]) {
+                match dest.is_relative() {
-            let dest = PathBuf::from(&a.to_string().replace("\"", ""));
+                    true => {
-
+                        let dest = self.get_root().join(&dest).to_owned();
-            // If path is relative make it absolute from the parent directory of src
+                        self.set_dest(&dest);
-            if dest.is_relative() {
+                    },
-                let dest = &self.get_src().parent().unwrap().join(&dest);
+                    false => { self.set_dest(&dest); },
-                self.set_dest(dest);
+                }
             }
         }
 
         self
     }
 
+    pub fn get_root(&self) -> &Path {
+        &self.root
+    }
+
+    pub fn set_root(&mut self, root: &Path) -> &mut Self {
+        self.root = root.to_owned();
+        self
+    }
+
     pub fn get_dest(&self) -> &Path {
         &self.dest
     }

src/book/mdbook.rs

@@ -1,4 +1,4 @@
-use std::path::{Path, PathBuf};
+use std::path::Path;
 use std::fs::{self, File, metadata};
 use std::io::Write;
 use std::error::Error;
@@ -12,7 +12,6 @@ use renderer::HtmlHandlebars;
 
 pub struct MDBook {
     config: BookConfig,
-    pub root: PathBuf,
     pub content: Vec<BookItem>,
     renderer: Box<Renderer>,
 }
@@ -39,9 +38,8 @@ impl MDBook {
         }
 
         MDBook {
-            root: root.to_path_buf(),
             content: vec![],
-            config: BookConfig::new()
+            config: BookConfig::new(root)
                         .set_src(&root.join("src"))
                         .set_dest(&root.join("book"))
                         .to_owned(),
@@ -106,7 +104,7 @@ impl MDBook {
                 // There is a very high chance that the error is due to the fact that
                 // the directory / file does not exist
                 debug!("[*]: {:?} does not exist, trying to create directory", dest);
-                fs::create_dir(&dest).unwrap();
+                try!(fs::create_dir(&dest));
             },
             Ok(_) => { /* If there is no error, the directory / file does exist */ }
         }
@@ -117,7 +115,7 @@ impl MDBook {
                 // There is a very high chance that the error is due to the fact that
                 // the directory / file does not exist
                 debug!("[*]: {:?} does not exist, trying to create directory", src);
-                fs::create_dir(&src).unwrap();
+                try!(fs::create_dir(&src));
             },
             Ok(_) => { /* If there is no error, the directory / file does exist */ }
         }
@@ -128,7 +126,7 @@ impl MDBook {
                 // There is a very high chance that the error is due to the fact that
                 // the directory / file does not exist
                 debug!("[*]: {:?} does not exist, trying to create SUMMARY.md", src.join("SUMMARY.md"));
-                Ok(File::create(&src.join("SUMMARY.md")).unwrap())
+                Ok(try!(File::create(&src.join("SUMMARY.md"))))
             },
             Ok(_) => {
                 /* If there is no error, the directory / file does exist */
@@ -143,7 +141,7 @@ impl MDBook {
             try!(writeln!(f, ""));
             try!(writeln!(f, "- [Chapter 1](./chapter_1.md)"));
 
-            let mut chapter_1 = File::create(&src.join("chapter_1.md")).unwrap();
+            let mut chapter_1 = try!(File::create(&src.join("chapter_1.md")));
             try!(writeln!(chapter_1, "# Chapter 1"));
         }
 
@@ -181,7 +179,7 @@ impl MDBook {
                 // There is a very high chance that the error is due to the fact that
                 // the directory / file does not exist
                 debug!("[*]: {:?} does not exist, trying to create directory", theme_dir);
-                fs::create_dir(&theme_dir).unwrap();
+                try!(fs::create_dir(&theme_dir));
             },
             Ok(_) => { /* If there is no error, the directory / file does exist */ }
         }
@@ -226,7 +224,8 @@ impl MDBook {
     /// of the current working directory by using a relative path instead of an absolute path.
 
     pub fn read_config(mut self) -> Self {
-        self.config.read_config(&self.root);
+        let root = self.config.get_root().to_owned();
+        self.config.read_config(&root);
         self
     }
 
@@ -256,7 +255,16 @@ impl MDBook {
     }
 
     pub fn set_dest(mut self, dest: &Path) -> Self {
-        self.config.set_dest(&self.root.join(dest));
+
+        // Handle absolute and relative paths
+        match dest.is_absolute() {
+            true => { self.config.set_dest(dest); },
+            false => {
+                let dest = self.config.get_root().join(dest).to_owned();
+                self.config.set_dest(&dest);
+            }
+        }
+
         self
     }
 
@@ -265,7 +273,16 @@ impl MDBook {
     }
 
     pub fn set_src(mut self, src: &Path) -> Self {
-        self.config.set_src(&self.root.join(src));
+
+        // Handle absolute and relative paths
+        match src.is_absolute() {
+            true => { self.config.set_src(src); },
+            false => {
+                let src = self.config.get_root().join(src).to_owned();
+                self.config.set_src(&src);
+            }
+        }
+
         self
     }
 

src/renderer/html_handlebars/hbs_renderer.rs

@@ -72,7 +72,11 @@ impl Renderer for HtmlHandlebars {
 
                 // Remove content from previous file and render content for this one
                 data.remove("path");
-                data.insert("path".to_string(), item.path.to_str().unwrap().to_json());
+                match item.path.to_str() {
+                    Some(p) => { data.insert("path".to_string(), p.to_json()); },
+                    None => return Err(Box::new(io::Error::new(io::ErrorKind::Other, "Could not convert path to str"))),
+                }
+
 
                 // Remove content from previous file and render content for this one
                 data.remove("content");
@@ -144,7 +148,10 @@ fn make_data(book: BookItems, config: &BookConfig) -> Result<BTreeMap<String,Jso
         let mut chapter = BTreeMap::new();
         chapter.insert("section".to_string(), section.to_json());
         chapter.insert("name".to_string(), item.name.to_json());
-        chapter.insert("path".to_string(), item.path.to_str().unwrap().to_json());
+        match item.path.to_str() {
+            Some(p) => { chapter.insert("path".to_string(), p.to_json()); },
+            None => return Err(Box::new(io::Error::new(io::ErrorKind::Other, "Could not convert path to str"))),
+        }
 
         chapters.push(chapter);
     }

src/renderer/html_handlebars/helpers/navigation.rs

@@ -30,9 +30,13 @@ pub fn previous(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext
 
     debug!("[*]: Decode chapters from JSON");
     // Decode json format
-    let decoded: Vec<BTreeMap<String, String>> = json::decode(&chapters.to_string()).unwrap();
+    let decoded: Vec<BTreeMap<String, String>> = match json::decode(&chapters.to_string()) {
+        Ok(data) => data,
+        Err(_) => return Err(RenderError{ desc: "Could not decode the JSON data"}),
+    };
     let mut previous: Option<BTreeMap<String, String>> = None;
 
+
     debug!("[*]: Search for current Chapter");
     // Search for current chapter and return previous entry
     for item in decoded {
@@ -48,22 +52,32 @@ pub fn previous(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext
                         // Create new BTreeMap to extend the context: 'title' and 'link'
                         let mut previous_chapter = BTreeMap::new();
 
-                        debug!("[*]: Inserting title: {}", previous.get("name").unwrap());
+                        // Chapter title
-                        previous_chapter.insert("title".to_string(), previous.get("name").unwrap().to_json());
+                        match previous.get("name") {
+                            Some(n) => {
+                                debug!("[*]: Inserting title: {}", n);
+                                previous_chapter.insert("title".to_string(), n.to_json())
+                            },
+                            None => {
+                                debug!("[*]: No title found for chapter");
+                                return Err(RenderError{ desc: "No title found for chapter in JSON data" })
+                            }
+                        };
 
-                        debug!("[*]: Inserting link: {}",
+                        // Chapter link
-                            path_to_root.join(
-                                Path::new(previous.get("path").unwrap())
-                                    .with_extension("html")
-                            ).to_str().unwrap());
 
-                        previous_chapter.insert(
+                        match previous.get("path") {
-                            "link".to_string(),
+                            Some(p) => {
-                            path_to_root.join(
+                                let path = path_to_root.join(Path::new(p).with_extension("html"));
-                                Path::new(previous.get("path").unwrap())
+                                debug!("[*]: Inserting link: {:?}", path);
-                                    .with_extension("html")
+
-                            ).to_str().unwrap().to_json()
+                                match path.to_str() {
-                        );
+                                    Some(p) => { previous_chapter.insert("link".to_string(), p.to_json()); },
+                                    None => return Err(RenderError{ desc: "Link could not be converted to str" })
+                                }
+                            },
+                            None => return Err(RenderError{ desc: "No path found for chapter in JSON data" })
+                        }
 
                         debug!("[*]: Inject in context");
                         // Inject in current context
@@ -71,7 +85,13 @@ pub fn previous(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext
 
                         debug!("[*]: Render template");
                         // Render template
-                        _h.template().unwrap().render(&updated_context, r, rc).unwrap();
+                        match _h.template() {
+                            Some(t) => {
+                                try!(t.render(&updated_context, r, rc));
+                            },
+                            None => return Err(RenderError{ desc: "Error with the handlebars template" })
+                        }
+
                     }
 
                     break;
@@ -81,8 +101,11 @@ pub fn previous(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext
                 }
             },
             _ => continue,
+
         }
+
     }
+
     Ok(())
 }
 
@@ -110,7 +133,10 @@ pub fn next(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext) ->
 
     debug!("[*]: Decode chapters from JSON");
     // Decode json format
-    let decoded: Vec<BTreeMap<String, String>> = json::decode(&chapters.to_string()).unwrap();
+    let decoded: Vec<BTreeMap<String, String>> = match json::decode(&chapters.to_string()) {
+        Ok(data) => data,
+        Err(_) => return Err(RenderError{ desc: "Could not decode the JSON data"}),
+    };
     let mut previous: Option<BTreeMap<String, String>> = None;
 
     debug!("[*]: Search for current Chapter");
@@ -122,37 +148,48 @@ pub fn next(c: &Context, _h: &Helper, r: &Handlebars, rc: &mut RenderContext) ->
             Some(path) if path.len() > 0 => {
 
                 if let Some(previous) = previous {
-                    if previous.get("path").unwrap() == &current {
+
+                    let path = match previous.get("path") {
+                        Some(p) => p,
+                        None => return Err(RenderError{ desc: "No path found for chapter in JSON data"})
+                    };
+
+                    if path == &current {
 
                         debug!("[*]: Found current chapter");
                         debug!("[*]: Creating BTreeMap to inject in context");
                         // Create new BTreeMap to extend the context: 'title' and 'link'
                         let mut next_chapter = BTreeMap::new();
 
-                        debug!("[*]: Inserting title: {}", item.get("name").unwrap());
+                        match item.get("name") {
-                        next_chapter.insert("title".to_string(), item.get("name").unwrap().to_json());
+                            Some(n) => {
+                                debug!("[*]: Inserting title: {}", n);
+                                next_chapter.insert("title".to_string(), n.to_json());
+                            }
+                            None => return Err(RenderError{ desc: "No title found for chapter in JSON data"})
+                        }
 
-                        debug!("[*]: Inserting link: {}",
+                        let link = path_to_root.join(Path::new(path).with_extension("html"));
-                            path_to_root.join(
+                        debug!("[*]: Inserting link: {:?}", link);
-                                Path::new(item.get("path").unwrap())
-                                    .with_extension("html")
-                            ).to_str().unwrap());
 
-                        next_chapter.insert(
+                        match link.to_str() {
-                            "link".to_string(),
+                            Some(l) => { next_chapter.insert("link".to_string(), l.to_json()); },
-                            path_to_root.join(
+                            None => return Err(RenderError{ desc: "Link could not converted to str"})
-                                Path::new(item.get("path").unwrap())
+                        }
-                                    .with_extension("html")
-                            ).to_str().unwrap().to_json()
-                        );
 
                         debug!("[*]: Inject in context");
                         // Inject in current context
                         let updated_context = c.extend(&next_chapter);
 
                         debug!("[*]: Render template");
+
                         // Render template
-                        _h.template().unwrap().render(&updated_context, r, rc).unwrap();
+                        match _h.template() {
+                            Some(t) => {
+                                try!(t.render(&updated_context, r, rc));
+                            },
+                            None => return Err(RenderError{ desc: "Error with the handlebars template" })
+                        }
 
                         break
                     }

src/theme/mod.rs

@@ -63,7 +63,9 @@ impl Theme {
         match File::open(&src.join("index.hbs")) {
             Ok(mut f) => {
                 theme.index.clear(); // Reset the value, because read_to_string appends...
-                f.read_to_end(&mut theme.index).unwrap();
+                match f.read_to_end(&mut theme.index) {
+                    _ => {}
+                };
             },
             _ => {},
         }
@@ -72,7 +74,9 @@ impl Theme {
         match File::open(&src.join("book.js")) {
             Ok(mut f) => {
                 theme.js.clear();
-                f.read_to_end(&mut theme.js).unwrap();
+                match f.read_to_end(&mut theme.js){
+                    _ => {}
+                }
             },
             _ => {},
         }
@@ -81,7 +85,9 @@ impl Theme {
         match File::open(&src.join("book.css")) {
             Ok(mut f) => {
                 theme.css.clear();
-                f.read_to_end(&mut theme.css).unwrap();
+                match f.read_to_end(&mut theme.css) {
+                    _ => {}
+                }
             },
             _ => {},
         }
@@ -90,7 +96,9 @@ impl Theme {
         match File::open(&src.join("highlight.js")) {
             Ok(mut f) => {
                 theme.highlight_js.clear();
-                f.read_to_end(&mut theme.highlight_js).unwrap();
+                match f.read_to_end(&mut theme.highlight_js) {
+                    _ => {}
+                }
             },
             _ => {},
         }
@@ -99,7 +107,9 @@ impl Theme {
         match File::open(&src.join("highlight.css")) {
             Ok(mut f) => {
                 theme.highlight_css.clear();
-                f.read_to_end(&mut theme.highlight_css).unwrap();
+                match f.read_to_end(&mut theme.highlight_css) {
+                    _ => {}
+                }
             },
             _ => {},
         }