OS-specific build files

Signed-off-by: Shlomi Noach <[email protected]>

go/osutil/os.go → go/osutil/loadavg.go

@@ -18,40 +18,10 @@ package osutil
 
 import (
 	"fmt"
-	"os"
-	"os/exec"
-	"runtime"
 	"strconv"
 	"strings"
 )
 
-// LoadAvg returns the past 1 minute system load average. This works on linux and darwin systems.
-// On other systems, it returns 0 with no error.
-func LoadAvg() (float64, error) {
-	switch runtime.GOOS {
-	case "linux":
-		content, err := os.ReadFile("/proc/loadavg")
-		if err != nil {
-			return 0, err
-		}
-		return parseLoadAvg(string(content))
-	case "darwin":
-		cmd := exec.Command("sysctl", "-n", "vm.loadavg")
-		// Sample output: `{ 2.83 3.01 3.36 }`
-		output, err := cmd.CombinedOutput()
-		if err != nil {
-			return 0, err
-		}
-		if len(output) < 1 {
-			return 0, fmt.Errorf("unexpected sysctl output: %q", output)
-		}
-		output = output[1:] // Remove the leading `{ `
-		return parseLoadAvg(string(output))
-	default:
-		return 0, nil
-	}
-}
-
 // parseLoadAvg parses the load average from the content of /proc/loadavg or sysctl output.
 // Input such as "1.00 0.99 0.98 1/1 1", "2.83 3.01 3.36"
 func parseLoadAvg(content string) (float64, error) {

go/osutil/loadavg_darwin.go

@@ -0,0 +1,40 @@
+//go:build darwin
+
+/*
+Copyright 2024 The Vitess Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package osutil
+
+import (
+	"fmt"
+	"os/exec"
+)
+
+// LoadAvg returns the past 1 minute system load average. This works on linux and darwin systems.
+// On other systems, it returns 0 with no error.
+func LoadAvg() (float64, error) {
+	cmd := exec.Command("sysctl", "-n", "vm.loadavg")
+	// Sample output: `{ 2.83 3.01 3.36 }`
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return 0, err
+	}
+	if len(output) < 1 {
+		return 0, fmt.Errorf("unexpected sysctl output: %q", output)
+	}
+	output = output[1:] // Remove the leading `{ `
+	return parseLoadAvg(string(output))
+}

go/osutil/loadavg_linux.go

@@ -0,0 +1,33 @@
+//go:build linux
+
+/*
+Copyright 2024 The Vitess Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package osutil
+
+import (
+	"os"
+)
+
+// LoadAvg returns the past 1 minute system load average. This works on linux and darwin systems.
+// On other systems, it returns 0 with no error.
+func LoadAvg() (float64, error) {
+	content, err := os.ReadFile("/proc/loadavg")
+	if err != nil {
+		return 0, err
+	}
+	return parseLoadAvg(string(content))
+}

go/osutil/loadavg_other.go

@@ -0,0 +1,25 @@
+//go:build !linux && !darwin
+
+/*
+Copyright 2024 The Vitess Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package osutil
+
+// LoadAvg returns the past 1 minute system load average. This works on linux and darwin systems.
+// On other systems, it returns 0 with no error.
+func LoadAvg() (float64, error) {
+	return 0, nil
+}