add skip_slides toml entry feature

README.md

@@ -20,6 +20,8 @@ It will create a new HTML file for every chapter in your `mdbook`. Each HTML fil
 
 You can also pass `--index-template ./index-template.html` and a file called `${OUTPUT_DIR}/index.html` will be created using that template, replacing `$INDEX` with a series of HTML headings, subheadings and links to each slide deck.
 
+You may also use a `skip_slides = ["some-file.md", "another-file.md"]` toml entry under `[book]` in your `book.toml` to skip those files from being included in the slides entirely.
+
 You can see an example of using this tool at <https://github.com/ferrous-systems/rust-training>.
 
 ## MSRV

src/lib.rs

@@ -75,8 +75,10 @@ pub fn run(
         .get("src")
         .and_then(|v| v.as_str())
         .ok_or(Error::NoSrcField)?;
+    let book_skip_slides = book_config.get("skip_slides");
     log::info!("Book title: {:?}", book_title);
     log::info!("Book src: {:?}", book_src);
+    log::info!("Book skip list: {:?}", book_skip_slides);
 
     let mdbook_summary_path = {
         let mut path = mdbook_path.join(book_src);
@@ -86,6 +88,29 @@ pub fn run(
 
     log::info!("Loading book summary: {}", mdbook_summary_path.display());
     let summary_src = std::fs::read_to_string(&mdbook_summary_path)?;
+
+    // Filter out any slides given in the `skip_slides` toml array entry
+    let summary_src =  match book_skip_slides {
+        None => summary_src,
+        Some(skip_list) => summary_src
+            .lines()
+            // We can unwrap because we already matched on the `skip_list` being a toml array
+            .filter(|haystack| { 
+                let skip_list = skip_list.as_array().unwrap();
+                skip_list.iter().all(|needle| {
+                    // toml string arrays give you the opening and closing quotes - we need to trim them
+                    let needle = &needle.to_string();
+                    let needle = needle.trim_matches('"');
+                    if haystack.contains(&needle.to_string()) {
+                        log::info!("Skipped: {needle}");
+                    }
+                    !haystack.contains(&needle.to_string())
+                })
+            })
+            // .lines() iterator chopped off the newlines, we have to put them back in
+            .map(|s| s.to_string() + "\n")
+            .collect::<String>(),
+    };
     let index_entries = load_book(&summary_src)?;
 
     std::fs::create_dir_all(output_dir)?;