add current stable build to CI and fix 0.16.0-dev.224+f63cd9194 nightly build (#50)

- resolve `try file.readToEndAlloc(b.allocator, 8192)` being removed in
0.16.x-dev
- resolve issue where `std.io` doesn't work in 0.16.x-dev
- update CI config to cover 0.15.1 and 0.14.0 (for now)

Author: silbinarywolf

.github/workflows/ci.yml

@@ -41,13 +41,13 @@ jobs:
     # Stable Zig Builds
     #
 
-    - name: Setup Zig Stable (0.14.0)
+    - name: Setup Zig Stable (0.15.1)
       # note(jae): 2024-09-15
       # Uses download mirror first as preferred by Zig Foundation
       # see: https://ziglang.org/news/migrate-to-self-hosting/
       uses: mlugg/setup-zig@v2
       with:
-        version: "0.14.0"
+        version: "0.15.1"
 
     - name: Build Minimal Example (Zig Stable)
       run: zig build -Dandroid=true --verbose
@@ -94,6 +94,23 @@ jobs:
     #       adb shell monkey --kill-process-after-error --monitor-native-crashes --pct-touch 100 -p com.zig.sdl2 --throttle 1000 -v 2
     #     working-directory: examples/sdl2
 
+    #
+    # Previous Stable Zig Build
+    #
+
+    - name: Setup Zig Previous Stable (0.14.0)
+      uses: mlugg/setup-zig@v2
+      with:
+        version: "0.14.0"
+
+    - name: Build Minimal Example (Zig Previous Stable)
+      run: zig build -Dandroid=true --verbose
+      working-directory: examples/minimal
+
+    - name: Build SDL2 Example (Zig Previous Stable)
+      run: zig build -Dandroid=true --verbose
+      working-directory: examples/sdl2
+
     #
     # Nightly Zig Builds
     #

src/android/android.zig

@@ -176,7 +176,7 @@ const AndroidLog = struct {
         };
     }
 
-    fn log_each_newline(logger: *AndroidLog, buffer: []const u8) std.io.Writer.Error!usize {
+    fn log_each_newline(logger: *AndroidLog, buffer: []const u8) std.Io.Writer.Error!usize {
         var written: usize = 0;
         var bytes_to_log = buffer;
         while (std.mem.indexOfScalar(u8, bytes_to_log, '\n')) |newline_pos| {
@@ -191,7 +191,7 @@ const AndroidLog = struct {
         return written;
     }
 
-    fn drain(w: *std.Io.Writer, data: []const []const u8, splat: usize) std.io.Writer.Error!usize {
+    fn drain(w: *std.Io.Writer, data: []const []const u8, splat: usize) std.Io.Writer.Error!usize {
         const logger: *AndroidLog = @alignCast(@fieldParentPtr("writer", w));
         var written: usize = 0;
 

src/androidbuild/builtin_options_update.zig

@@ -43,13 +43,11 @@ fn make(step: *Step, _: Build.Step.MakeOptions) !void {
 
     const package_name_path = builtin_options_update.package_name_stdout.getPath3(b, step);
 
-    // NOTE(jae): 2025-07-23
-    // As of Zig 0.15.0-dev.1092+d772c0627, package_name_path.openFile("") is not possible as it assumes you're appending *something*
-    const file = try package_name_path.root_dir.handle.openFile(package_name_path.sub_path, .{});
-
     // Read package name from stdout and strip line feed / carriage return
     // ie. "com.zig.sdl2\n\r"
-    const package_name_filedata = try file.readToEndAlloc(b.allocator, 8192);
+    const package_name_backing_buf = try b.allocator.alloc(u8, 8192);
+    defer b.allocator.free(package_name_backing_buf);
+    const package_name_filedata = try package_name_path.root_dir.handle.readFile(package_name_path.sub_path, package_name_backing_buf);
     const package_name_stripped = std.mem.trimRight(u8, package_name_filedata, " \r\n");
     const package_name: [:0]const u8 = try b.allocator.dupeZ(u8, package_name_stripped);