Fix UUID for Darwin hosts

- Addresses rs#100 based on fix suggested by @rpendleton
- Adds multi-platform matrix run strategy to actions

Author: dcarbone

.github/workflows/go.yml

@@ -10,24 +10,30 @@ on:
 
 jobs:
   test:
-    name: Test
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        platform: [ubuntu-latest, windows-latest, macos-13, macos-latest]
+    name: Test - ${{ matrix.platform }}
+    runs-on: ${{ matrix.platform }}
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-go@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
         with:
-          go-version: "1.18"
+          go-version-file: "go.mod"
           check-latest: true
-      - run: go test -race -failfast ./...
+      - run: go vet ./... && go test -race -failfast ./...
   golangci-lint:
-    name: golangci-lint
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        platform: [ ubuntu-latest, windows-latest, macos-13, macos-latest ]
+    name: golangci-lint - ${{ matrix.platform }}
+    runs-on: ${{ matrix.platform }}
     steps:
-      - uses: actions/checkout@v3
-      - uses: actions/setup-go@v3
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
         with:
-          go-version: "1.18"
+          go-version-file: "go.mod"
           check-latest: true
-      - uses: golangci/golangci-lint-action@v3
+      - uses: golangci/golangci-lint-action@v6
         with:
           version: latest

.gitignore

@@ -0,0 +1,3 @@
+/.idea
+/.vscode
+.DS_Store

hostid_darwin.go

@@ -1,9 +1,34 @@
-// +build darwin
+//go:build darwin
 
 package xid
 
-import "syscall"
+import (
+	"errors"
+	"os/exec"
+	"strings"
+)
 
 func readPlatformMachineID() (string, error) {
-	return syscall.Sysctl("kern.uuid")
+	ioreg, err := exec.LookPath("ioreg")
+	if err != nil {
+		return "", err
+	}
+
+	cmd := exec.Command(ioreg, "-rd1", "-c", "IOPlatformExpertDevice")
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		return "", err
+	}
+
+	for _, line := range strings.Split(string(out), "\n") {
+		if strings.Contains(line, "IOPlatformUUID") {
+			parts := strings.SplitAfter(line, `" = "`)
+			if len(parts) == 2 {
+				uuid := strings.TrimRight(parts[1], `"`)
+				return strings.ToLower(uuid), nil
+			}
+		}
+	}
+
+	return "", errors.New("cannot find host id")
 }