ci: add cygwin job and

install python for cygwin
Also, cygwin has a unix-like naming convention using dlls

[sdl-ci-filter cygwin]

Author: madebr

.github/workflows/create-test-plan.py

@@ -42,6 +42,7 @@ class SdlPlatform(Enum):
     Haiku = "haiku"
     LoongArch64 = "loongarch64"
     Msys2 = "msys2"
+    Cygwin = "cygwin"
     Linux = "linux"
     MacOS = "macos"
     Ios = "ios"
@@ -110,6 +111,7 @@ class JobSpec:
     "msys2-mingw64": JobSpec(name="Windows (msys2, mingw64)",               os=JobOs.WindowsLatest,     platform=SdlPlatform.Msys2,       artifact="SDL-mingw64",            msys2_platform=Msys2Platform.Mingw64, ),
     "msys2-clang64": JobSpec(name="Windows (msys2, clang64)",               os=JobOs.WindowsLatest,     platform=SdlPlatform.Msys2,       artifact="SDL-mingw64-clang",      msys2_platform=Msys2Platform.Clang64, ),
     "msys2-ucrt64": JobSpec(name="Windows (msys2, ucrt64)",                 os=JobOs.WindowsLatest,     platform=SdlPlatform.Msys2,       artifact="SDL-mingw64-ucrt",       msys2_platform=Msys2Platform.Ucrt64, ),
+    "cygwin": JobSpec(name="Cygwin",                                        os=JobOs.WindowsLatest,     platform=SdlPlatform.Cygwin,      artifact="SDL-cygwin", ),
     "msvc-x64": JobSpec(name="Windows (MSVC, x64)",                         os=JobOs.WindowsLatest,     platform=SdlPlatform.Msvc,        artifact="SDL-VC-x64",             msvc_arch=MsvcArch.X64,   msvc_project="VisualC/SDL.sln", ),
     "msvc-x86": JobSpec(name="Windows (MSVC, x86)",                         os=JobOs.WindowsLatest,     platform=SdlPlatform.Msvc,        artifact="SDL-VC-x86",             msvc_arch=MsvcArch.X86,   msvc_project="VisualC/SDL.sln", ),
     "msvc-clang-x64": JobSpec(name="Windows (MSVC, clang-cl x64)",          os=JobOs.WindowsLatest,     platform=SdlPlatform.Msvc,        artifact="SDL-clang-cl-x64",       msvc_arch=MsvcArch.X64,   clang_cl=True, ),
@@ -161,6 +163,7 @@ class StaticLibType(Enum):
 
 class SharedLibType(Enum):
     WIN32 = "SDL3.dll"
+    CYGDLL = "cygSDL3-0.dll"
     SO_0 = "libSDL3.so.0"
     SO = "libSDL3.so"
     DYLIB = "libSDL3.0.dylib"
@@ -216,6 +219,7 @@ class JobDetails:
     intel: bool = False
     msys2_msystem: str = ""
     msys2_packages: list[str] = dataclasses.field(default_factory=list)
+    cygwin_packages: list[str] = dataclasses.field(default_factory=list)
     werror: bool = True
     msvc_vcvars_arch: str = ""
     msvc_vcvars_sdk: str = ""
@@ -252,6 +256,7 @@ def to_workflow(self, enable_artifacts: bool) -> dict[str, str|bool]:
             "shell": self.shell,
             "msys2-msystem": self.msys2_msystem,
             "msys2-packages": my_shlex_join(self.msys2_packages),
+            "cygwin-packages": my_shlex_join(self.cygwin_packages),
             "android-ndk": self.android_ndk,
             "java": self.java,
             "intel": self.intel,
@@ -764,6 +769,20 @@ def spec_to_job(spec: JobSpec, key: str, trackmem_symbol_names: bool, ctest_args
                 job.msys2_packages.append(f"{msys2_env}-clang-tools-extra")
             if job.ccache:
                 job.msys2_packages.append(f"{msys2_env}-ccache")
+        case SdlPlatform.Cygwin:
+            job.ccache = True
+            job.shell = "bash --noprofile --norc -eo pipefail -o igncr {0}"
+            job.shared_lib = SharedLibType.CYGDLL
+            job.static_lib = StaticLibType.A
+            job.cygwin_packages.extend([
+                "ccache",
+                "cmake",
+                "gcc-core",
+                "gcc-g++",
+                "ninja",
+                "pkg-config",
+                "python",
+            ])
         case SdlPlatform.Riscos:
             job.ccache = False  # FIXME: enable when container gets upgrade
             # FIXME: Enable SDL_WERROR

.github/workflows/generic.yml

@@ -28,6 +28,11 @@ jobs:
         with:
           msystem: ${{ matrix.platform.msys2-msystem }}
           install: ${{ matrix.platform.msys2-packages }}
+      - name: 'Set up Cygwin'
+        if: ${{ matrix.platform.platform == 'cygwin' }}
+        uses: cygwin/cygwin-install-action@master
+        with:
+          packages: ${{ matrix.platform.cygwin-packages }}
       - name: 'About this job'
         run: |
           echo "key=${{ matrix.platform.key }}"