Fix warnings and update Readme

Signed-off-by: trivernis <trivernis@protonmail.com>

README.md

@@ -4,6 +4,20 @@
 This projects goal is to implement a fast markdown parser with an extended syntax fitted
 for my needs.
 
+## Installation
+
+You need a working rust installation, for example by using [rustup](http://rustup.rs).
+
+```sh
+cargo install snekdown
+```
+
+With pdf rendering
+
+```sh
+cargo install snekdown --features pdf
+```
+
 ## Usage
 
 ```

src/format/chromium_pdf/mod.rs

@@ -6,12 +6,9 @@ use crate::references::configuration::keys::INCLUDE_MATHJAX;
 use crate::utils::downloads::get_cached_path;
 use headless_chrome::protocol::page::PrintToPdfOptions;
 use headless_chrome::{Browser, LaunchOptionsBuilder, Tab};
-use std::error::Error;
-use std::fs::{File, OpenOptions};
-use std::io;
+use std::fs::OpenOptions;
 use std::io::BufWriter;
 use std::path::PathBuf;
-use std::sync::{Arc, Mutex};
 use std::thread;
 use std::time::{Duration, Instant};
 
@@ -40,7 +37,7 @@ pub fn render_to_pdf(document: Document) -> PdfRenderingResult<Vec<u8>> {
                     .open(file_path)?,
             );
             let mut html_writer = HTMLWriter::new(Box::new(writer));
-            document.to_html(&mut html_writer);
+            document.to_html(&mut html_writer)?;
             log::debug!("Successfully rendered temporary html file!");
             html_writer.flush()
         }

src/main.rs

@@ -54,7 +54,6 @@ fn main() {
         .filter_module("mio", LevelFilter::Warn)
         .filter_module("want", LevelFilter::Warn)
         .format(|buf, record| {
-            use std::io::Write;
             let color = get_level_style(record.level());
             writeln!(
                 buf,
@@ -133,7 +132,7 @@ fn render(opt: &Opt) -> Parser {
         .create(true)
         .open(&opt.output)
         .unwrap();
-    let mut writer = BufWriter::new(file);
+    let writer = BufWriter::new(file);
 
     render_format(opt, document, writer);
     log::info!("Rendering took:   {:?}", start_render.elapsed());
@@ -143,7 +142,7 @@ fn render(opt: &Opt) -> Parser {
 }
 
 #[cfg(not(feature = "pdf"))]
-fn render_format(opt: &Opt, document: Document, mut writer: BufWriter<File>) {
+fn render_format(opt: &Opt, document: Document, writer: BufWriter<File>) {
     match opt.format.as_str() {
         "html" => render_html(document, writer),
         _ => log::error!("Unknown format {}", opt.format),
@@ -151,7 +150,7 @@ fn render_format(opt: &Opt, document: Document, mut writer: BufWriter<File>) {
 }
 
 #[cfg(feature = "pdf")]
-fn render_format(opt: &Opt, document: Document, mut writer: BufWriter<File>) {
+fn render_format(opt: &Opt, document: Document, writer: BufWriter<File>) {
     match opt.format.as_str() {
         "html" => render_html(document, writer),
         "pdf" => render_pdf(document, writer),
@@ -159,7 +158,7 @@ fn render_format(opt: &Opt, document: Document, mut writer: BufWriter<File>) {
     }
 }
 
-fn render_html(document: Document, mut writer: BufWriter<File>) {
+fn render_html(document: Document, writer: BufWriter<File>) {
     let mut writer = HTMLWriter::new(Box::new(writer));
     document.to_html(&mut writer).unwrap();
     writer.flush().unwrap();