Allow cutting out a large amount of dependencies

Before this change, if you wanted to include physis you had to include
a bunch of dependencies you didn't need. For example, a launcher would
have to pull in texpresso which is completely useless. By default,
the features from before (excluding game_install) are included.

Also this creates a game_install feature for eventual Windows builds,
where unshield is not supported.

Cargo.toml

@@ -19,18 +19,33 @@ harness = false
 system-deps = "6"
 
 [package.metadata.system-deps]
-libunshield = "1.4"
+libunshield = { version = "1.4", feature = "game_install" }
 
 [dev-dependencies]
+# used for patch install checking
 walkdir = "2"
 hmac-sha512 = "1"
+
+# used while rust doesn't have native benchmarking capability
 criterion = "0.4"
+
 # used for testing our jamcrc implementation
 crc = "3"
 
 [features]
+default = ["visual_data"]
+
+# enables game install support using unshield (only supported on Linux and macOS)
+game_install = []
+
+# enables support for extracting visual data, such as models, textures, materials, etc
+# this enables a whole bunch of dependencies!
+# tip: can be safely turned off for launchers and other tools that simply need to extract the bare minimum of data
+visual_data = ["dep:half", "dep:hard-xml", "dep:serde_json", "dep:serde", "dep:glam", "dep:bitflags", "dep:texpresso"]
+
+# testing only features
 retail_game_testing = []
-patch_testing = []
+patch_testing = ["game_install"]
 
 [dependencies]
 # amazing binary parsing/writing library
@@ -44,20 +59,20 @@ bitfield-struct = "0.1"
 paste = "1"
 
 # needed for half-float support which FFXIV uses in it's model data
-half = "2"
+half = { version = "2", optional = true }
 
 # needed for havok xml parsing
-hard-xml = "1"
+hard-xml = { version = "1", optional = true }
 
 # needed for textools skel parsing
-serde_json = "1"
-serde = { version = "1", features = ["derive"] }
+serde_json = { version = "1", optional = true }
+serde = { version = "1", optional = true, features = ["derive"] }
 
 # needed for deconstructing skeleton pose matrices
-glam = "0.22"
+glam = { version = "0.22", optional = true }
 
 # needed for c-style bitflags used in some formats (such as tex files)
-bitflags = "1.3"
+bitflags = { version = "1.3", optional = true }
 
 # needed for dxt/bc decompression
-texpresso = "2"
+texpresso = { version = "2", optional = true }

src/lib.rs

@@ -19,6 +19,7 @@ mod compression;
 mod dat;
 
 /// Reading model (MDL) files.
+#[cfg(feature = "visual_data")]
 pub mod model;
 
 /// All of the races in Eorzea in a nice enum package.
@@ -45,6 +46,7 @@ pub mod blowfish;
 mod blowfish_constants;
 
 /// Initializing a new retail game install from the official retail installer. No execution required!
+#[cfg(feature = "game_install")]
 pub mod installer;
 
 /// Reading Excel header files (EXH).
@@ -54,6 +56,7 @@ pub mod exh;
 pub mod exd;
 
 /// Reading Havok XML sidecar files.
+#[cfg(feature = "visual_data")]
 pub mod skeleton;
 
 /// Reading file into files (FIIN).
@@ -63,9 +66,11 @@ pub mod fiin;
 pub mod log;
 
 /// Reading textures (TEX).
+#[cfg(feature = "visual_data")]
 pub mod tex;
 
 /// Reading material files (MTRL)
+#[cfg(feature = "visual_data")]
 pub mod mtrl;
 
 mod crc;

src/sha1.rs

@@ -6,15 +6,6 @@
 //!
 //! This implementation supports no_std.
 //!
-//! ## Example
-//!
-//! ```rust
-//! let mut m = sha1_smol::Sha1::new();
-//! m.update(b"Hello World!");
-//! assert_eq!(m.digest().to_string(),
-//!            "2ef7bde608ce5404e97d5f042f95f89f1c232871");
-//! ```
-//!
 //! The sha1 object can be updated multiple times.
 
 #![deny(missing_docs)]

tests/integration_test.rs

@@ -1,7 +1,6 @@
 use hmac_sha512::Hash;
 use physis::fiin::FileInfo;
 use physis::index;
-use physis::installer::install_game;
 use physis::patch::apply_patch;
 use std::collections::HashMap;
 use std::env;
@@ -44,7 +43,10 @@ fn test_fiin() {
     assert_eq!(fiin.entries[1].file_name, "steam_api64.dll");
 }
 
+#[cfg(feature = "patch_testing")]
 fn make_temp_install_dir(name: &str) -> String {
+    use physis::installer::install_game;
+
     let installer_exe = env::var("FFXIV_INSTALLER").unwrap();
 
     let mut game_dir = env::home_dir().unwrap();
@@ -63,6 +65,7 @@ fn make_temp_install_dir(name: &str) -> String {
     game_dir.as_path().to_str().unwrap().parse().unwrap()
 }
 
+#[cfg(feature = "patch_testing")]
 fn fill_dir_hash(game_dir: &str) -> HashMap<String, [u8; 64]> {
     let mut file_hashes: HashMap<String, [u8; 64]> = HashMap::new();
 
@@ -86,6 +89,7 @@ fn fill_dir_hash(game_dir: &str) -> HashMap<String, [u8; 64]> {
     file_hashes
 }
 
+#[cfg(feature = "patch_testing")]
 fn physis_install_patch(game_directory: &str, data_directory: &str, patch_name: &str) {
     let patch_dir = env::var("FFXIV_PATCH_DIR").unwrap();
 
@@ -95,6 +99,7 @@ fn physis_install_patch(game_directory: &str, data_directory: &str, patch_name:
     apply_patch(&data_dir, &patch_path).unwrap();
 }
 
+#[cfg(feature = "patch_testing")]
 fn xivlauncher_install_patch(game_directory: &str, data_directory: &str, patch_name: &str) {
     let patch_dir = env::var("FFXIV_PATCH_DIR").unwrap();
     let patcher_exe = env::var("FFXIV_XIV_LAUNCHER_PATCHER").unwrap();
@@ -110,7 +115,7 @@ fn xivlauncher_install_patch(game_directory: &str, data_directory: &str, patch_n
 }
 
 #[test]
-#[cfg_attr(not(feature = "patch_testing"), ignore)]
+#[cfg(feature = "patch_testing")]
 fn test_patching() {
     println!("Beginning game installation...");