game_data: PilotRoster loader — player squadron flight assignments

Decode the UNITS/ZUNITS player-unit tables (GP_HANGAR_ARSENAL.pak) into
flight assignments: which pilot flies each callsign (Rhino1→Katana,
Bird1→Sandra, …), plus the player craft. Assignments are `Callsign<N>-
Pilot` tokens, extracted by shape.

138 configs; the distinct line-ups trace the campaign's story — Raymond
leads Rhino flight early (Rhino1=Raymond, Rhino2=Katana), then Katana
takes the lead (Rhino1=Katana, Rhino2=Ellen, Rhino3=Gene, Rhino4=Yoji).
Example `flights` prints the line-ups. +1 test.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

crates/sylpheed-formats/examples/flights.rs

@@ -0,0 +1,17 @@
+use sylpheed_formats::{game_data as gd, PakArchive};
+fn main(){
+    let disc=std::env::var("SYLPHEED_DISC").unwrap();
+    let pak=PakArchive::open(format!("{disc}/dat/GP_HANGAR_ARSENAL.pak")).unwrap();
+    let rosters=gd::load_pilot_rosters(&pak);
+    // distinct rosters by their pilot set
+    let mut seen=std::collections::BTreeSet::new(); let mut shown=0;
+    println!("{} pilot-roster configs; distinct line-ups:", rosters.len());
+    for r in &rosters{
+        let key:String=r.pilots.iter().map(|(c,p)|format!("{c}:{p}")).collect::<Vec<_>>().join(",");
+        if seen.insert(key) && shown<8 {
+            shown+=1;
+            let flt:Vec<String>=r.pilots.iter().map(|(c,p)|format!("{c}={p}")).collect();
+            println!("  {}", flt.join("  "));
+        }
+    }
+}

crates/sylpheed-formats/src/game_data.rs

@@ -623,6 +623,54 @@ pub fn load_unit_rosters(pak: &PakArchive) -> Vec<UnitRoster> {
     out
 }
 
+// ── Pilot roster (player squadron assignments) ──────────────────────────────────
+
+/// The player squadron's flight assignments for a mission — which pilot flies each
+/// callsign (`Rhino1` → `Katana`, `Bird1` → `Sandra`, …). Parsed from the
+/// `UNITS`/`ZUNITS` player-unit tables (in `GP_HANGAR_ARSENAL.pak`); assignments
+/// vary per mission (different missions field different wingmen).
+#[derive(Debug, Clone)]
+pub struct PilotRoster {
+    /// `(callsign, pilot)` pairs in flight order, e.g. `("Rhino1", "Katana")`.
+    pub pilots: Vec<(String, String)>,
+    /// The player craft unit id (`UN_f002_TCAF_DeltaSaber…`).
+    pub player_unit: Option<String>,
+}
+
+/// True for a `Callsign<N>-Pilot` token (a single hyphen, digit-suffixed callsign,
+/// alphabetic pilot) — the flight-assignment shape.
+fn is_assignment(s: &str) -> bool {
+    let Some((cs, pilot)) = s.split_once('-') else { return false };
+    !pilot.is_empty()
+        && pilot.chars().all(|c| c.is_ascii_alphabetic())
+        && cs.len() >= 2
+        && cs.as_bytes()[cs.len() - 1].is_ascii_digit()
+        && cs.chars().all(|c| c.is_ascii_alphanumeric())
+}
+
+/// Load every player pilot roster from a pak (scan `GP_HANGAR_ARSENAL.pak`). One
+/// per player-unit config; rosters with no assignment tokens are skipped.
+pub fn load_pilot_rosters(pak: &PakArchive) -> Vec<PilotRoster> {
+    let mut out = Vec::new();
+    for e in pak.entries() {
+        let Ok(b) = pak.read(e) else { continue };
+        let Ok(o) = IdxdObject::parse(&b) else { continue };
+        let t = o.tokens();
+        let pilots: Vec<(String, String)> = t
+            .iter()
+            .filter(|s| is_assignment(s))
+            .filter_map(|s| s.split_once('-').map(|(c, p)| (c.to_string(), p.to_string())))
+            .collect();
+        if pilots.len() >= 2 {
+            out.push(PilotRoster {
+                pilots,
+                player_unit: t.iter().find(|s| s.starts_with("UN_")).cloned(),
+            });
+        }
+    }
+    out
+}
+
 // ── Generic record access (any of the ~105 schemas) ─────────────────────────────
 
 /// A generically-decoded IDXD record: its table name, schema id, identity, and
@@ -808,6 +856,20 @@ mod tests {
         assert!(s01.is_some_and(|r| r.units.iter().any(|u| u.contains("DeltaSaber"))));
     }
 
+    #[test]
+    fn loads_pilot_rosters() {
+        let Ok(disc) = std::env::var("SYLPHEED_DISC") else { return };
+        let Ok(pak) = PakArchive::open(format!("{disc}/dat/GP_HANGAR_ARSENAL.pak")) else { return };
+        let rosters = load_pilot_rosters(&pak);
+        assert!(!rosters.is_empty(), "expected player pilot rosters");
+        // Some config assigns Katana to a Rhino callsign (she leads Rhino flight).
+        assert!(rosters.iter().any(|r| {
+            r.pilots.iter().any(|(cs, p)| cs.starts_with("Rhino") && p == "Katana")
+        }));
+        // Bird flight exists too.
+        assert!(rosters.iter().any(|r| r.pilots.iter().any(|(cs, _)| cs.starts_with("Bird"))));
+    }
+
     #[test]
     fn generic_records_read_any_schema() {
         let Some(pak) = pak() else { return };