mach: add centralized is_debug flag

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

src/main.zig

@@ -50,6 +50,8 @@ pub const Entities = @import("module/main.zig").Entities;
 pub const use_sysgpu = if (@hasDecl(@import("root"), "use_sysgpu")) @import("root").use_sysgpu else false;
 pub const gpu = if (use_sysgpu) sysgpu.sysgpu else wgpu;
 
+pub const is_debug = builtin.mode == .Debug;
+
 test {
     const std = @import("std");
     // TODO: refactor code so we can use this here:

src/module/Archetype.zig

@@ -9,6 +9,9 @@ const Allocator = std.mem.Allocator;
 const testing = std.testing;
 const assert = std.debug.assert;
 const builtin = @import("builtin");
+
+const is_debug = @import("../main.zig").is_debug;
+
 const StringTable = @import("StringTable.zig");
 const ComponentTypesByName = @import("module.zig").ComponentTypesByName;
 
@@ -234,8 +237,6 @@ pub fn debugPrint(storage: *Archetype) void {
     }
 }
 
-pub const is_debug = builtin.mode == .Debug;
-
 /// Returns a unique comptime usize integer representing the type T. Value will change across
 /// different compilations.
 pub fn typeId(comptime T: type) u32 {

src/module/entities.zig

@@ -3,6 +3,9 @@ const Allocator = std.mem.Allocator;
 const testing = std.testing;
 const builtin = @import("builtin");
 const assert = std.debug.assert;
+
+const is_debug = @import("../main.zig").is_debug;
+
 const Archetype = @import("Archetype.zig");
 const StringTable = @import("StringTable.zig");
 const ComponentTypesByName = @import("module.zig").ComponentTypesByName;
@@ -885,7 +888,7 @@ pub fn Database(comptime modules: anytype) type {
         }
 
         fn applyDeferredActions(e: *Self) !void {
-            if (comptime Archetype.is_debug) if (e.active_queries.items.len != 0) @panic("application may result in active query iterators being invalidated");
+            if (is_debug) if (e.active_queries.items.len != 0) @panic("application may result in active query iterators being invalidated");
             while (true) {
                 const ev = e.deferred_queue.readItem() orelse return;
                 switch (ev) {

src/module/module.zig

@@ -1,10 +1,11 @@
 const builtin = @import("builtin");
 const std = @import("std");
-const testing = @import("../testing.zig");
+
+const is_debug = @import("../main.zig").is_debug;
+const testing = @import("../main.zig").testing;
 
 const Database = @import("entities.zig").Database;
 const EntityID = @import("entities.zig").EntityID;
-const is_debug = @import("Archetype.zig").is_debug;
 const builtin_modules = @import("main.zig").builtin_modules;
 
 const log = std.log.scoped(.mach);