Implement SpeedRunIGT Parsing

`SpeedRunIGT` is a Minecraft mod that brings a full timer with deep auto
splitting capabilities to Minecraft. They recently added support for
https://therun.gg and it seems like it's quite commonly used, probably
the most commonly used timer after LiveSplit at this point. So it makes
sense for us to be able to parse these splits.

I also snuck in a few cleanups along the way (some now possible because
of Rust 1.65).

Cargo.toml

@@ -126,7 +126,6 @@ std = [
     "serde/std",
     "simdutf8/std",
     "snafu/std",
-    "time/formatting",
     "time/local-offset",
     "tiny-skia?/std",
     "winapi",

capi/Cargo.toml

@@ -11,7 +11,7 @@ crate-type = ["staticlib", "cdylib"]
 [dependencies]
 livesplit-core = { path = "..", default-features = false, features = ["std"] }
 serde_json = { version = "1.0.8", default-features = false }
-time = { version = "0.3.4", default-features = false }
+time = { version = "0.3.4", default-features = false, features = ["formatting"] }
 simdutf8 = { version = "0.1.4", default-features = false }
 
 [features]

crates/livesplit-auto-splitting/src/runtime.rs

@@ -195,11 +195,10 @@ impl<T: Timer> Runtime<T> {
             .get_typed_func(&mut store, "update")
             .context(MissingUpdateFunction)?;
 
-        if let Some(Extern::Memory(mem)) = instance.get_export(&mut store, "memory") {
-            store.data_mut().memory = Some(mem);
-        } else {
+        let Some(Extern::Memory(mem)) = instance.get_export(&mut store, "memory") else {
             return Err(CreationError::MissingMemory);
-        }
+        };
+        store.data_mut().memory = Some(mem);
 
         Ok(Self {
             engine,

src/analysis/state_helper.rs

@@ -1,8 +1,9 @@
 //! Provides different helper functions.
 
-use crate::comparison::best_segments;
-use crate::settings::SemanticColor;
-use crate::{timing::Snapshot, Run, Segment, TimeSpan, Timer, TimerPhase, TimingMethod};
+use crate::{
+    comparison::best_segments, settings::SemanticColor, timing::Snapshot, Run, Segment, TimeSpan,
+    Timer, TimerPhase, TimingMethod,
+};
 
 /// Gets the last non-live delta in the run starting from `segment_index`.
 ///
@@ -283,11 +284,11 @@ pub fn check_live_delta(
                 && best_segment_delta.map_or(false, |d| d > TimeSpan::zero())
             || comparison_delta.map_or(false, |d| d > TimeSpan::zero())
         {
-            if split_delta {
-                return catch! { current_time? - current_split? };
+            return if split_delta {
+                catch! { current_time? - current_split? }
             } else {
-                return comparison_delta;
-            }
+                comparison_delta
+            };
         }
     }
     None

src/component/title/mod.rs

@@ -232,18 +232,16 @@ impl Component {
                     let unchanged = catch! {
                         let mut rem = &**state.line1.last()?;
 
-                        if let Some(rest) = rem.strip_prefix(game_name) {
-                            rem = rest;
-                        } else {
+                        let Some(rest) = rem.strip_prefix(game_name) else {
                             return None;
-                        }
+                        };
+                        rem = rest;
 
                         if !game_name.is_empty() && !full_category_name.is_empty() {
-                            if let Some(rest) = rem.strip_prefix(" - ") {
-                                rem = rest;
-                            } else {
+                            let Some(rest) = rem.strip_prefix(" - ") else {
                                 return None;
-                            }
+                            };
+                            rem = rest;
                         }
 
                         if rem != full_category_name {

src/run/parser/composite.rs

@@ -31,8 +31,8 @@
 
 use super::{
     face_split, flitter, livesplit, llanfair, llanfair_gered, portal2_live_timer, shit_split,
-    source_live_timer, splits_io, splitterino, splitterz, splitty, time_split_tracker, urn, wsplit,
-    TimerKind,
+    source_live_timer, speedrun_igt, splits_io, splitterino, splitterz, splitty,
+    time_split_tracker, urn, wsplit, TimerKind,
 };
 use crate::{platform::path::PathBuf, Run};
 use core::{result::Result as StdResult, str};
@@ -142,8 +142,9 @@ pub fn parse(source: &[u8], path: Option<PathBuf>, load_files: bool) -> Result<P
             return Ok(parsed(run, TimerKind::Generic(timer)));
         }
 
-        // Splitterino, SourceLiveTimer and Flitter need to be before Urn because of
-        // a false positive due to the nature of parsing json files.
+        // Splitterino, SourceLiveTimer, Flitter, and SpeedRunIGT need to be
+        // before Urn because of a false positive due to the nature of parsing
+        // JSON files.
         if let Ok(run) = splitterino::parse(source) {
             return Ok(parsed(run, TimerKind::Splitterino));
         }
@@ -156,6 +157,10 @@ pub fn parse(source: &[u8], path: Option<PathBuf>, load_files: bool) -> Result<P
             return Ok(parsed(run, TimerKind::SourceLiveTimer));
         }
 
+        if let Ok(run) = speedrun_igt::parse(source) {
+            return Ok(parsed(run, TimerKind::SpeedRunIGT));
+        }
+
         // Urn accepts entirely empty JSON files.
         if let Ok(run) = urn::parse(source) {
             return Ok(parsed(run, TimerKind::Urn));

src/run/parser/mod.rs

@@ -39,6 +39,7 @@ pub mod llanfair_gered;
 pub mod portal2_live_timer;
 pub mod shit_split;
 pub mod source_live_timer;
+pub mod speedrun_igt;
 pub mod splits_io;
 pub mod splitterino;
 pub mod splitterz;