[WIP] feat(styles): name compiled sass with sha

.gitignore

@@ -1,8 +1,9 @@
 /target/
 **/*.rs.bk
 /node_modules
-/static/styles/app.css
-/static/styles/fonts.css
 /static/styles/*.map
 .sass-cache
 localhost*
+/static/styles/vendor.css
+/static/styles/app_*.css
+/static/styles/fonts_*.css

Cargo.toml

@@ -13,6 +13,7 @@ serde_yaml = "0.8.7"
 sass-rs = "0.2.1"
 reqwest = "0.9.5"
 toml = "0.4"
+siphasher = "0.2.3"
 
 [dependencies.rocket_contrib]
 version = "*"

src/main.rs

@@ -5,6 +5,7 @@ extern crate rand;
 extern crate reqwest;
 extern crate rocket;
 extern crate sass_rs;
+extern crate siphasher;
 extern crate toml;
 
 extern crate rocket_contrib;
@@ -19,8 +20,11 @@ mod rust_version;
 use group::*;
 use production::User;
 
+use std::collections::hash_map::DefaultHasher;
 use std::collections::HashMap;
+use std::fs;
 use std::fs::File;
+use std::hash::Hasher;
 use std::io::prelude::*;
 use std::path::{Path, PathBuf};
 
@@ -226,21 +230,42 @@ fn catch_error() -> Template {
     not_found()
 }
 
+fn hash_css(css: &str) -> String {
+    let mut hasher = DefaultHasher::new();
+    hasher.write(css.as_bytes());
+    hasher.finish().to_string()
+}
+
 fn compile_sass(filename: &str) {
     let scss_file = format!("./src/styles/{}.scss", filename);
-    let css_file = format!("./static/styles/{}.css", filename);
 
     let css = compile_file(&scss_file, Options::default())
         .expect(&format!("couldn't compile sass: {}", &scss_file));
+    let css_sha = format!("{}_{}", filename, hash_css(&css));
+    let css_file = format!("./static/styles/{}.css", css_sha);
     let mut file =
         File::create(&css_file).expect(&format!("couldn't make css file: {}", &css_file));
     file.write_all(&css.into_bytes())
         .expect(&format!("couldn't write css file: {}", &css_file));
 }
 
+fn concat_vendor_css(files: Vec<&str>) {
+    let mut concatted = String::new();
+    for filestem in files {
+        let vendor_path = format!("./static/styles/{}.css", filestem);
+        let mut file = File::open(vendor_path).expect("couldn't read vendor css");
+        let mut contents = String::new();
+        file.read_to_string(&mut contents)
+            .expect("couldn't read vendor css");
+        concatted.push_str(&contents);
+    }
+    fs::write("./static/styles/vendor.css", &concatted).expect("couldn't write vendor css");
+}
+
 fn main() {
     compile_sass("app");
     compile_sass("fonts");
+    concat_vendor_css(vec!["skeleton", "tachyons"]);
 
     rocket::ignite()
         .attach(Template::fairing())