From a646e5e4068d2976f56cd7ec67751680d5441f50 Mon Sep 17 00:00:00 2001
From: Ashley Williams <ashley666ashley@gmail.com>
Date: Tue, 4 Dec 2018 16:41:48 -0500
Subject: [PATCH] feat(styles): name compiled sass with sha

---
 .gitignore  |  4 ++--
 Cargo.lock  |  1 +
 Cargo.toml  |  1 +
 src/main.rs | 12 +++++++++++-
 4 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/.gitignore b/.gitignore
index db7ed209a..574a2597f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,9 +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
diff --git a/Cargo.lock b/Cargo.lock
index 2b17b3b8f..14a8d791d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1500,6 +1500,7 @@ dependencies = [
  "serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_yaml 0.8.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "siphasher 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "toml 0.4.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
diff --git a/Cargo.toml b/Cargo.toml
index 95b33eea2..a5cb29c30 100644
--- a/Cargo.toml
+++ b/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 = "*"
diff --git a/src/main.rs b/src/main.rs
index 50ce95ae7..a708a0436 100644
--- a/src/main.rs
+++ b/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;
@@ -19,9 +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};
 
@@ -227,12 +230,19 @@ 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())