Add a dependency manager for render-time actions.

This will be used for supporting things like copying static files or rendering code blocks like gnuplot or graphviz.

src/command/build/render.rs

@@ -7,6 +7,7 @@ use tokio::fs::DirEntry;
 use tokio::task::JoinHandle;
 
 use crate::config::Config;
+use crate::context::DependencyManager;
 use crate::context::RenderBlogPostPage;
 use crate::context::RenderBlogPostPageInput;
 use crate::context::RenderBlogStream;
@@ -85,11 +86,14 @@ impl SiteRenderer {
 
         for page in &self.pages {
             let output_path = self.output_directory.join(page.get_output_path());
+            let dependency_manager =
+                std::sync::Arc::new(std::sync::Mutex::new(DependencyManager::new()));
             let render_context = RenderContext::new(
                 config,
                 self.output_directory.as_path(),
                 output_path.as_path(),
                 None,
+                dependency_manager,
             )?;
             let render_context = RenderPage::new(render_context, page)?;
             let rendered_output = renderer_integration.render(render_context)?;
@@ -113,12 +117,15 @@ impl SiteRenderer {
                     .join(config.get_relative_path_to_post(&blog_post.id))
                     .join(blog_post_page.get_output_path());
 
+                let dependency_manager =
+                    std::sync::Arc::new(std::sync::Mutex::new(DependencyManager::new()));
                 let convert_input = RenderBlogPostPageInput::new(blog_post, blog_post_page);
                 let render_context = RenderContext::new(
                     config,
                     self.output_directory.as_path(),
                     output_path.as_path(),
                     None,
+                    dependency_manager,
                 )?;
                 let render_context = RenderBlogPostPage::new(render_context, &convert_input)?;
                 let rendered_output = renderer_integration.render(render_context)?;
@@ -127,6 +134,9 @@ impl SiteRenderer {
                     .ok_or("Output file should have a containing directory.")?;
                 tokio::fs::create_dir_all(parent_directory).await?;
                 tokio::fs::write(output_path, rendered_output).await?;
+
+                // TODO: Copy post files to output.
+                // TODO: Update link src to generate path correct for where the page is rendered.
             }
         }
 
@@ -194,12 +204,15 @@ impl SiteRenderer {
                 )?)
             };
 
+            let dependency_manager =
+                std::sync::Arc::new(std::sync::Mutex::new(DependencyManager::new()));
             let convert_input = RenderBlogStreamInput::new(chunk, older_link, newer_link);
             let render_context = RenderContext::new(
                 config,
                 self.output_directory.as_path(),
                 output_file.as_path(),
                 None,
+                dependency_manager,
             )?;
             let blog_stream = RenderBlogStream::new(render_context, &convert_input)?;