Update to Zig 0.16.0

.clang-format

@@ -179,4 +179,3 @@ WhitespaceSensitiveMacros:
   - PP_STRINGIZE
   - BOOST_PP_STRINGIZE
 ---
-

.github/workflows/test.yml

@@ -1196,9 +1196,29 @@ jobs:
       - name: Test GTK Build
         run: nix develop -c zig build -Dapp-runtime=gtk -Demit-docs -Demit-webdata
 
-      # This relies on the cache being populated by the commands above.
+        # NOTE: This used to point to the Zig global cache directory before
+        # 0.16.0. Now, the cache directory exclusively stores "minified"
+        # archives of each dependency (i.e., only the paths defined in
+        # build.zig.zon), and an uncompressed, working copy is stored in
+        # PROJECT_ROOT/zig-pkg. The zig-pkg directory is warmed up during the
+        # regular fetching process from the global cache directory if
+        # possible.
+        #
+        # Nothing else should change; zon2nix's store path mimics what a
+        # zig-pkg directory should look like, so actual build steps should be
+        # fine, it's just here where we assume that all dependencies have been
+        # downloaded, and we want to test the validity of the package
+        # directory, do we need to have it pointing to zig-pkg and not the
+        # zon2nix store path.
+        #
+        # Note that this can also be attempted by running:
+        #   zig build --fetch=needed
+        #
+        # Note that --system PKGDIR should not be added to this invocation as
+        # it disables fetching altogether (even, seemingly, from the local
+        # cache).
       - name: Test System Build
-        run: nix develop -c zig build --system ${ZIG_GLOBAL_CACHE_DIR}/p
+        run: nix develop -c zig build --system "$(realpath zig-pkg)"
 
   test-lib-vt:
     if: github.repository == 'ghostty-org/ghostty' && needs.skip.outputs.skip != 'true'

.gitignore

@@ -10,6 +10,7 @@
 zig-cache/
 .zig-cache/
 zig-out/
+zig-pkg/
 build-cmake/
 CMakeCache.txt
 CMakeFiles/
@@ -29,3 +30,4 @@ glad.zip
 
 vgcore.*
 
+/sprite_face_test*

build.zig

@@ -25,9 +25,10 @@ pub fn build(b: *std.Build) !void {
     // use that as the version source of truth. Otherwise we fall back
     // to what is in the build.zig.zon.
     const file_version: ?[]const u8 = if (b.build_root.handle.readFileAlloc(
-        b.allocator,
+        b.graph.io,
         "VERSION",
-        128,
+        b.allocator,
+        .limited(128),
     )) |content| std.mem.trim(
         u8,
         content,
@@ -298,7 +299,7 @@ pub fn build(b: *std.Build) !void {
         // We need to rebuild Ghostty with a baseline CPU target.
         const valgrind_exe = exe: {
             var valgrind_config = config;
-            valgrind_config.target = valgrind_config.baselineTarget();
+            valgrind_config.target = valgrind_config.baselineTarget(b.graph.io);
             break :exe try buildpkg.GhosttyExe.init(
                 b,
                 &valgrind_config,
@@ -343,7 +344,7 @@ pub fn build(b: *std.Build) !void {
             .filters = test_filters,
             .root_module = b.createModule(.{
                 .root_source_file = b.path("src/main.zig"),
-                .target = config.baselineTarget(),
+                .target = config.baselineTarget(b.graph.io),
                 .optimize = .Debug,
                 .strip = false,
                 .omit_frame_pointer = false,
@@ -358,7 +359,7 @@ pub fn build(b: *std.Build) !void {
         // Verify our internal libghostty header.
         const ghostty_h = b.addTranslateC(.{
             .root_source_file = b.path("include/ghostty.h"),
-            .target = config.baselineTarget(),
+            .target = config.baselineTarget(b.graph.io),
             .optimize = .Debug,
         });
         test_exe.root_module.addImport("ghostty.h", ghostty_h.createModule());

build.zig.zon

@@ -3,62 +3,71 @@
     .version = "1.3.2-dev",
     .paths = .{""},
     .fingerprint = 0x64407a2a0b4147e5,
-    .minimum_zig_version = "0.15.2",
+    .minimum_zig_version = "0.16.0",
     .dependencies = .{
-        // Zig libs
+        // External translate-c
+        // NOTE: We might not need to keep this around forever, but we need it
+        // for at least the 0.16.0 release cycle since we need fixes in
+        // Aro/translate-c itself.
+        .translate_c = .{
+            .lazy = true,
+            .url = "https://codeberg.org/vancluever/translate-c/archive/a5bc193c925b03f74d44e1a4b29c117822473b91.tar.gz",
+            .hash = "translate_c-0.0.0-Q_BUWhFXBwBZBr7EnRC97AKPYXbwHkpcc4TASklMqZu9",
+        },
 
+        // Zig libs
         .libxev = .{
             // mitchellh/libxev
-            .url = "https://deps.files.ghostty.org/libxev-34fa50878aec6e5fa8f532867001ab3c36fae23e.tar.gz",
-            .hash = "libxev-0.0.0-86vtc4IcEwCqEYxEYoN_3KXmc6A9VLcm22aVImfvecYs",
+            .url = "https://github.com/mitchellh/libxev/archive/9ce8e8e6ff89e583258a7f8e7adeeeaeae8611bf.tar.gz",
+            .hash = "libxev-0.0.0-86vtcwIRFADbH4hk-EjROXxlrKIRPQdA41XiTSytYO-F",
             .lazy = true,
         },
         .vaxis = .{
             // rockorager/libvaxis
-            .url = "https://deps.files.ghostty.org/vaxis-7dbb9fd3122e4ffad262dd7c151d80d863b68558.tar.gz",
-            .hash = "vaxis-0.5.1-BWNV_LosCQAGmCCNOLljCIw6j6-yt53tji6n6rwJ2BhS",
+            .url = "https://github.com/rockorager/libvaxis/archive/1dbbe575dff4586fe51e3217aa5c3fecdcbb6089.tar.gz",
+            .hash = "vaxis-0.6.0-BWNV_CrbCQCscGpzsAlR402rYQ_tV3aAl081c2iRRkka",
             .lazy = true,
         },
         .z2d = .{
             // vancluever/z2d
-            .url = "https://deps.files.ghostty.org/z2d-0.10.0-j5P_Hu-6FgBsZNgwphIqh17jDnj8_yPtD8yzjO6PpHRQ.tar.gz",
-            .hash = "z2d-0.10.0-j5P_Hu-6FgBsZNgwphIqh17jDnj8_yPtD8yzjO6PpHRQ",
+            .url = "https://github.com/vancluever/z2d/archive/refs/tags/v0.11.0.tar.gz",
+            .hash = "z2d-0.11.0-j5P_HtLzDwBGyQt49DrT0v4BuVqI_SRs6CXsuj7eBVhR",
             .lazy = true,
         },
         .zig_objc = .{
             // mitchellh/zig-objc
-            .url = "https://deps.files.ghostty.org/zig_objc-f356ed02833f0f1b8e84d50bed9e807bf7cdc0ae.tar.gz",
-            .hash = "zig_objc-0.0.0-Ir_Sp5gTAQCvxxR7oVIrPXxXwsfKgVP7_wqoOQrZjFeK",
+            .url = "https://github.com/mitchellh/zig-objc/archive/c8de82ff80281215ad92900866dab7103a8efa8b.tar.gz",
+            .hash = "zig_objc-0.0.0-Ir_Sp9gsAQCPAJc0oF5xoWePHWP6Y6tCphDeyNUThJoi",
             .lazy = true,
         },
         .zig_js = .{
             // mitchellh/zig-js
-            .url = "https://deps.files.ghostty.org/zig_js-04db83c617da1956ac5adc1cb9ba1e434c1cb6fd.tar.gz",
-            .hash = "zig_js-0.0.0-rjCAV-6GAADxFug7rDmPH-uM_XcnJ5NmuAMJCAscMjhi",
+            .url = "https://github.com/mitchellh/zig-js/archive/3c23860e47fdcdc5af805efb7fd0bdac5fd3e9bc.tar.gz",
+            .hash = "zig_js-0.0.0-rjCAV7-GAADvMTBL7lPMuvDk7xgS9PCMIZWiOUXLZSlj",
             .lazy = true,
         },
         .uucode = .{
             // jacobsandlund/uucode
-            .url = "https://deps.files.ghostty.org/uucode-0.2.0-ZZjBPqZVVABQepOqZHR7vV_NcaN-wats0IB6o-Exj6m9.tar.gz",
-            .hash = "uucode-0.2.0-ZZjBPqZVVABQepOqZHR7vV_NcaN-wats0IB6o-Exj6m9",
+            .url = "https://github.com/jacobsandlund/uucode/archive/2826a37a4562284fdacd8fa029d49509cc9bffcd.tar.gz",
+            .hash = "uucode-0.2.0-ZZjBPlK5VADj7fdoq7G8LIHzD5o6FSkcBXXrRWr4jnrA",
         },
         .zig_wayland = .{
             // codeberg ifreund/zig-wayland
-            .url = "https://deps.files.ghostty.org/zig_wayland-1b5c038ec10da20ed3a15b0b2a6db1c21383e8ea.tar.gz",
-            .hash = "wayland-0.5.0-dev-lQa1khrMAQDJDwYFKpdH3HizherB7sHo5dKMECfvxQHe",
+            .url = "https://codeberg.org/ifreund/zig-wayland/archive/v0.6.0.tar.gz",
+            .hash = "wayland-0.6.0-lQa1kqz8AQADQmdNJsNhLoNHcnEGEUjrOaPV-dtEnEmX",
             .lazy = true,
         },
         .zf = .{
             // natecraddock/zf
-            .url = "https://deps.files.ghostty.org/zf-3c52637b7e937c5ae61fd679717da3e276765b23.tar.gz",
-            .hash = "zf-0.10.3-OIRy8RuJAACKA3Lohoumrt85nRbHwbpMcUaLES8vxDnh",
+            .url = "https://github.com/natecraddock/zf/archive/c35c421f84895193246db06c40683c1a30e616ef.tar.gz",
+            .hash = "zf-0.11.0-OIRy8X-RAAAwaRXHMYpj2uvBnuGTZWEE_3V7acqHQNtW",
             .lazy = true,
         },
         .gobject = .{
             // https://github.com/ghostty-org/zig-gobject based on zig_gobject
             // Temporary until we generate them at build time automatically.
-            .url = "https://deps.files.ghostty.org/gobject-2025-11-08-23-1.tar.zst",
-            .hash = "gobject-0.3.0-Skun7ANLnwDvEfIpVmohcppXgOvg_I6YOJFmPIsKfXk-",
+            .url = "https://github.com/ghostty-org/zig-gobject/releases/download/0.8.0-2026-04-23-26-1/ghostty-gobject-0.8.0-2026-04-23-26-1.tar.zst",
+            .hash = "gobject-0.3.1-Skun7E1KnwBGMX5nslHYG1yWHaSevywxQO8oM7tTOgIp",
             .lazy = true,
         },