Pulled index rendering out into its own method

src/renderer/html_handlebars/hbs_renderer.rs

@@ -1,7 +1,7 @@
 use renderer::html_handlebars::helpers;
 use renderer::Renderer;
 use book::MDBook;
-use book::bookitem::BookItem;
+use book::bookitem::{BookItem, Chapter};
 use utils;
 use theme::{self, Theme};
 use regex::{Regex, Captures};
@@ -28,7 +28,7 @@ impl HtmlHandlebars {
     }
 
     fn render_item(&self, item: &BookItem, book: &MDBook, data: &mut serde_json::Map<String, serde_json::Value>,
-                   print_content: &mut String, handlebars: &mut Handlebars, index: &mut bool, destination: &Path)
+                   print_content: &mut String, handlebars: &mut Handlebars, is_index: bool, destination: &Path)
                    -> Result<(), Box<Error>> {
         // FIXME: This should be made DRY-er and rely less on mutable state
         match *item {
@@ -75,7 +75,18 @@ impl HtmlHandlebars {
                     book.write_file(filename, &rendered.into_bytes())?;
 
                     // Create an index.html from the first element in SUMMARY.md
-                    if *index {
+                    if is_index {
+                        self.render_index(book, ch, destination)?;
+                    }
+                }
+            },
+            _ => {},
+        }
+
+        Ok(())
+    }
+
+    fn render_index(&self, book: &MDBook, ch: &Chapter, destination: &Path) -> Result<(), Box<Error>> {
                             debug!("[*]: index.html");
 
                             let mut content = String::new();
@@ -99,12 +110,6 @@ impl HtmlHandlebars {
                                     .expect("If the HTML renderer is called, one would assume the HtmlConfig is \
                                             set... (4)")
                                     .join(&ch.path.with_extension("html")));
-                        *index = false;
-                    }
-                }
-            },
-            _ => {},
-        }
 
                                     Ok(())
     }
@@ -216,9 +221,9 @@ impl Renderer for HtmlHandlebars {
                                                "Unexpected error when constructing destination path")));
         }
 
-        let mut index = true;
-        for item in book.iter() {
-            self.render_item(item, book, &mut data, &mut print_content, &mut handlebars, &mut index, &destination)?;
+        for (i, item) in book.iter().enumerate() {
+            let is_index = i == 0;
+            self.render_item(item, book, &mut data, &mut print_content, &mut handlebars, is_index, &destination)?;
         }
 
         // Print version