Automatically run jacket processing

This commit makes it so jacket processing is automatically run if any of
it's outputs are missing from the filesystem, or if the hash of the raw
jacket directory has changes since the last recorded value.

Moreover, most assets and all fonts are now embedded in the binary!

src/arcaea/jacket.rs

@@ -8,7 +8,7 @@ use num::{Integer, ToPrimitive};
 use serde::{Deserialize, Serialize};
 
 use crate::arcaea::chart::{Difficulty, Jacket, SongCache};
-use crate::assets::get_asset_dir;
+use crate::context::paths::ShimmeringPaths;
 use crate::context::Error;
 // }}}
 
@@ -83,9 +83,9 @@ pub struct JacketCache {
 }
 
 // {{{ Read jackets
-pub fn read_jackets(song_cache: &mut SongCache) -> Result<(), Error> {
+pub fn read_jackets(paths: &ShimmeringPaths, song_cache: &mut SongCache) -> Result<(), Error> {
 	let suffix = format!("_{BITMAP_IMAGE_SIZE}.jpg");
-	let songs_dir = get_asset_dir().join("songs/by_id");
+	let songs_dir = paths.jackets_path();
 	let entries = fs::read_dir(songs_dir).with_context(|| "Couldn't read songs directory")?;
 
 	for entry in entries {
@@ -150,8 +150,8 @@ pub fn read_jackets(song_cache: &mut SongCache) -> Result<(), Error> {
 
 impl JacketCache {
 	// {{{ Generate
-	pub fn new() -> Result<Self, Error> {
-		let bytes = fs::read(get_asset_dir().join("songs/recognition_matrix"))
+	pub fn new(paths: &ShimmeringPaths) -> Result<Self, Error> {
+		let bytes = fs::read(paths.recognition_matrix_path())
 			.with_context(|| "Could not read jacket recognition matrix")?;
 
 		let result = postcard::from_bytes(&bytes)?;