Second post-bundle attempt

Cargo.toml

@@ -22,6 +22,7 @@ clap = "2.33.3"
 atom_syndication = "0.11.0"
 chrono = "0.4.19"
 url = { version = "2.2.2", features = ["serde"] }
+walkdir = "2.3.2"
 
 [features]
 fail-on-warnings = []

src/build.rs

@@ -25,7 +25,8 @@ pub fn build_site(config: Config) -> Result<()> {
     );
 
     // collect all posts
-    let posts = post_parser.parse_posts(&config.posts_source_directory)?;
+    let (posts, static_files) =
+        post_parser.parse_posts(&config.posts_source_directory)?;
 
     // Parse the template files.
     let index_template = parse_template(config.index_template.iter())?;
@@ -56,6 +57,9 @@ pub fn build_site(config: Config) -> Result<()> {
     };
     writer.write_posts(&posts)?;
 
+    // write the static files
+    writer.write_static_files(&static_files)?;
+
     // copy static directory
     copy_dir(
         &config.static_source_directory,

src/markdown.rs

@@ -56,6 +56,29 @@ impl<'a> EventConverter<'a> {
             // intercepting heading tags and returning the tag size + 2.
             Tag::Heading(s) => Tag::Heading(s + 2),
 
+            // Internal image links (links from blog posts, pages, and assets
+            // *to* posts, pages, and assets) need to be converted from their
+            // input formats to their output formats (e.g., a post linking to
+            // another post as `foo.md` will need to be converted to an
+            // equivalent link ending in `foo.html`).
+            Tag::Image(
+                link @ (LinkType::Inline
+                | LinkType::Reference
+                | LinkType::ReferenceUnknown
+                | LinkType::Shortcut
+                | LinkType::Autolink
+                | LinkType::Collapsed
+                | LinkType::CollapsedUnknown),
+                url,
+                title,
+            ) => Tag::Image(
+                link,
+                CowStr::Boxed(
+                    self.link_converter.convert(&url)?.into_boxed_str(),
+                ),
+                title,
+            ),
+
             // Internal links (links from blog posts, pages, and assets *to*
             // posts, pages, and assets) need to be converted from their input
             // formats to their output formats (e.g., a post linking to another