Added an auxgm manual; fixed dupe gases (!)

also cargo fmt whoops.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "auxmos"
-version = "1.1.0"
+version = "1.1.1"
 authors = ["Putnam <putnam3145@gmail.com>"]
 edition = "2021"
 

docs/AUXGM.md

@@ -0,0 +1,29 @@
+Auxgm is auxtools's way of consolidating gas info and allowing gases to be added at runtime. Its name is primarily a send-up of XGM, and... it mostly means the same thing, but it's subtly different.
+
+# Requirements
+
+Auxtools expects a global proc `/proc/_auxtools_register_gas(datum/gas/gas)` and a global variable called `gas_data`, with a list called `datums`. When `gas_data` is initialized, it should go through each individual gas datum and initialize them one-by-one, at the *very least* by adding an initialized gas variable to the `datums` list, but preferably using `_auxtools_register_gas`. Duplicated entries will overwrite the previous entry (as of 1.1.1).
+
+Individual gas datums require the following entries:
+
+`id`: string
+`name`: string
+`specific_heat`: number
+
+...And that's it. The rest is optional.
+
+If you're using Auxmos's built-in tile-based atmos, auxgm also requires an `overlays` list, which is initialized alongside `datums`. This can be completely empty if you want and Auxmos will run happily. Citadel initializes it like so:
+
+```dm
+		if(gas.moles_visible)
+			visibility[g] = gas.moles_visible
+			overlays[g] = new /list(FACTOR_GAS_VISIBLE_MAX)
+			for(var/i in 1 to FACTOR_GAS_VISIBLE_MAX)
+				overlays[g][i] = new /obj/effect/overlay/gas(gas.gas_overlay, i * 255 / FACTOR_GAS_VISIBLE_MAX)
+		else
+			visibility[g] = 0
+			overlays[g] = 0```
+
+Everything except the overlays lines are unnecessary. However, overlays does need to be organized as seen here, as auxgm handles gas overlays.
+
+If you're *not* using tile-based atmos, you're done; Auxmos's update_visuals is only called from a callback in auxgm's tile processing code and thus can be ignored.

src/gas/types.rs

@@ -252,23 +252,37 @@ fn _destroy_gas_info_structs() {
 #[hook("/proc/_auxtools_register_gas")]
 fn _hook_register_gas(gas: Value) {
 	let gas_id = gas.get_string(byond_string!("id"))?;
-	let gas_cache = GasType::new(gas, TOTAL_NUM_GASES.load(Ordering::Acquire))?;
-	let cached_id = gas_id.clone();
-	let cached_idx = gas_cache.idx;
-	unsafe { GAS_INFO_BY_STRING.as_ref() }
-		.unwrap()
-		.insert(gas_id.into_boxed_str(), gas_cache.clone());
-	GAS_SPECIFIC_HEATS
-		.write()
-		.as_mut()
-		.unwrap()
-		.push(gas_cache.specific_heat);
-	GAS_INFO_BY_IDX.write().as_mut().unwrap().push(gas_cache);
-	CACHED_IDX_TO_STRINGS.with(|gas_ids| {
-		let mut map = gas_ids.borrow_mut();
-		map.insert(cached_idx, cached_id.into_boxed_str())
-	});
-	TOTAL_NUM_GASES.fetch_add(1, Ordering::Release); // this is the only thing that stores it other than shutdown
+	match {
+		unsafe { GAS_INFO_BY_STRING.as_ref() }
+			.unwrap()
+			.get_mut(&gas_id as &str)
+	} {
+		Some(mut old_gas) => {
+			let gas_cache = GasType::new(gas, old_gas.idx)?;
+			*old_gas = gas_cache.clone();
+			GAS_SPECIFIC_HEATS.write().as_mut().unwrap()[old_gas.idx] = gas_cache.specific_heat;
+			GAS_INFO_BY_IDX.write().as_mut().unwrap()[old_gas.idx] = gas_cache;
+		}
+		None => {
+			let gas_cache = GasType::new(gas, TOTAL_NUM_GASES.load(Ordering::Acquire))?;
+			let cached_id = gas_id.clone();
+			let cached_idx = gas_cache.idx;
+			unsafe { GAS_INFO_BY_STRING.as_ref() }
+				.unwrap()
+				.insert(gas_id.into_boxed_str(), gas_cache.clone());
+			GAS_SPECIFIC_HEATS
+				.write()
+				.as_mut()
+				.unwrap()
+				.push(gas_cache.specific_heat);
+			GAS_INFO_BY_IDX.write().as_mut().unwrap().push(gas_cache);
+			CACHED_IDX_TO_STRINGS.with(|gas_ids| {
+				let mut map = gas_ids.borrow_mut();
+				map.insert(cached_idx, cached_id.into_boxed_str())
+			});
+			TOTAL_NUM_GASES.fetch_add(1, Ordering::Release); // this is the only thing that stores it other than shutdown
+		}
+	}
 	Ok(Value::null())
 }
 

src/turfs/monstermos.rs

@@ -733,7 +733,9 @@ fn process_planet_turfs(
 	Ok(Value::null())
 }
 
-#[deprecated(note = "Katmos should be used intead of Monstermos or Putnamos, as that one is actively maintained.")]
+#[deprecated(
+	note = "Katmos should be used intead of Monstermos or Putnamos, as that one is actively maintained."
+)]
 pub(crate) fn equalize(
 	equalize_turf_limit: usize,
 	equalize_hard_turf_limit: usize,

src/turfs/putnamos.rs

@@ -133,7 +133,9 @@ fn explosively_depressurize(
 
 // Just floodfills to lower-pressure turfs until it can't find any more.
 
-#[deprecated(note = "Katmos should be used intead of Monstermos or Putnamos, as that one is actively maintained.")]
+#[deprecated(
+	note = "Katmos should be used intead of Monstermos or Putnamos, as that one is actively maintained."
+)]
 pub fn equalize(
 	equalize_turf_limit: usize,
 	equalize_hard_turf_limit: usize,