fix(ci)!: disable lua 5.1 and luajit on master, drop 0.15.2 support

Now that nightly builds of Zig 0.16 have sufficiently diverged from
0.15.2, it's time to drop CI support on the main branch of ziglua in
order to continue merging PRs.

Unfortunately, the latest versions of `zig translate-c` appear to be
unable to deal with the `LUA_QL` macro present in Lua 5.1 and LuaJIT.
I've opened an issue, which is linked below. Once that issue is
resolved, these tests should be reenabled.

https://codeberg.org/ziglang/translate-c/issues/282

Author: robbielyman

.github/workflows/tests.yml

@@ -28,24 +28,24 @@ jobs:
       run: make test_zig_nightly
 
   #------ zig-0.15 ------
-  test_zig_015:
-    strategy:
-      matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest, ubuntu-24.04-arm]
+  #test_zig_015:
+  #  strategy:
+  #    matrix:
+  #      os: [ubuntu-latest, macos-latest, windows-latest, ubuntu-24.04-arm]
 
-    runs-on: ${{matrix.os}}
+  #  runs-on: ${{matrix.os}}
 
-    steps:
-    - name: Clone Ziglua
-      uses: actions/checkout@v3
+  #  steps:
+  #  - name: Clone Ziglua
+  #    uses: actions/checkout@v3
 
-    - name: Setup Zig
-      uses: mlugg/setup-zig@v2
-      with:
-        version: "0.15.2"
+  #  - name: Setup Zig
+  #    uses: mlugg/setup-zig@v2
+  #    with:
+  #      version: "0.15.2"
 
-    - name: Run tests
-      run: make test_zig_stable
+  #  - name: Run tests
+  #    run: make test_zig_stable
 
   #------ cross compilation ------
   test_cross:

makefile

@@ -1,7 +1,8 @@
 .PHONY: test docs
 
 test_zig_nightly:
-	zig build test --summary failures -Dlang=lua51
+	# FIXME: reenable after resolution of https://codeberg.org/ziglang/translate-c/issues/282
+	# zig build test --summary failures -Dlang=lua51
 	zig build test --summary failures -Dlang=lua52
 	zig build test --summary failures -Dlang=lua53
 	zig build test --summary failures -Dlang=lua54
@@ -11,7 +12,8 @@ test_zig_nightly:
 	zig build install-example-zig-function
 	zig build -Dlang=luau install-example-luau-bytecode
 
-	zig build -Dlang=luajit
+	# FIXME: reenable after resolution of https://codeberg.org/ziglang/translate-c/issues/282
+	# zig build -Dlang=luajit
 
 # A subset of tests that are expected to work also on stable builds of zig
 test_zig_stable:
@@ -25,18 +27,20 @@ test_zig_stable:
 	zig build install-example-zig-function
 	zig build -Dlang=luau install-example-luau-bytecode
 
-test_cross:
-	zig build -Dlang=lua51 -Dtarget=aarch64-linux
-	zig build -Dlang=lua51 -Dtarget=aarch64-linux-gnu
-	zig build -Dlang=luajit -Dtarget=aarch64-linux
-	zig build -Dlang=luajit -Dtarget=aarch64-linux-gnu
-
-	zig build -Dlang=lua51 -Dtarget=x86_64-linux
-	zig build -Dlang=lua51 -Dtarget=x86_64-linux-gnu
-	zig build -Dlang=luajit -Dtarget=x86_64-linux
-	zig build -Dlang=luajit -Dtarget=x86_64-linux-gnu
-
-	zig build -Dlang=luajit -Dtarget=aarch64-macos
+# TODO: audit this; is it expected that cross-compilation should be an issue?
+# FIXME: reenable after resolution of https://codeberg.org/ziglang/translate-c/issues/282
+# test_cross:
+# 	zig build -Dlang=lua51 -Dtarget=aarch64-linux
+# 	zig build -Dlang=lua51 -Dtarget=aarch64-linux-gnu
+# 	zig build -Dlang=luajit -Dtarget=aarch64-linux
+# 	zig build -Dlang=luajit -Dtarget=aarch64-linux-gnu
+# 
+# 	zig build -Dlang=lua51 -Dtarget=x86_64-linux
+# 	zig build -Dlang=lua51 -Dtarget=x86_64-linux-gnu
+# 	zig build -Dlang=luajit -Dtarget=x86_64-linux
+# 	zig build -Dlang=luajit -Dtarget=x86_64-linux-gnu
+# 
+# 	zig build -Dlang=luajit -Dtarget=aarch64-macos
 
 docs:
 	zig build docs