feat: migrate to golang

internal/core/platform.go

@@ -0,0 +1,61 @@
+package core
+
+import (
+	"path/filepath"
+	"runtime"
+)
+
+// binaryNames maps GOOS -> GOARCH -> mihomo release asset base name.
+// Mirrors core_manager.py's platform_map (core_manager.py:38-55). Unlike the
+// Python version, no separate arch-normalization table is needed since
+// runtime.GOARCH already reports "amd64"/"386"/"arm64"/"arm".
+var binaryNames = map[string]map[string]string{
+	"windows": {
+		"amd64": "mihomo-windows-amd64",
+		"386":   "mihomo-windows-386",
+		"arm64": "mihomo-windows-arm64",
+		"arm":   "mihomo-windows-arm32v7",
+	},
+	"linux": {
+		"amd64": "mihomo-linux-amd64",
+		"386":   "mihomo-linux-386",
+		"arm64": "mihomo-linux-arm64",
+		"arm":   "mihomo-linux-armv7",
+	},
+	"darwin": {
+		"amd64": "mihomo-darwin-amd64",
+		"arm64": "mihomo-darwin-arm64",
+	},
+}
+
+// platformInfo returns (system, arch, binaryNameBase), or ok=false if the
+// current platform/arch combination is unsupported.
+func platformInfo() (system, arch, binaryName string, ok bool) {
+	system = runtime.GOOS
+	arch = runtime.GOARCH
+
+	archs, systemSupported := binaryNames[system]
+	if !systemSupported {
+		return "", "", "", false
+	}
+	name, archSupported := archs[arch]
+	if !archSupported {
+		return "", "", "", false
+	}
+	return system, arch, name, true
+}
+
+// binaryPath returns the local path where the mihomo executable for the
+// current platform is (or will be) stored.
+func binaryPath(binDir string) string {
+	system, arch, _, ok := platformInfo()
+	if !ok {
+		system, arch = runtime.GOOS, runtime.GOARCH
+	}
+	suffix := "-" + system + "-" + arch
+	name := "mihomo" + suffix
+	if system == "windows" {
+		name += ".exe"
+	}
+	return filepath.Join(binDir, name)
+}