Testing for linux cpuinfo

internal/memory/linux_ram.go

@@ -0,0 +1,60 @@
+//go:build linux
+
+package memory
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+var numberRegex *regexp.Regexp = regexp.MustCompile(`\d+`)
+
+func getLinuxRamInfo() (MemoryInformation, error) {
+	memoryFile, err := os.Open("/proc/meminfo")
+	if err != nil {
+		return MemoryInformation{}, fmt.Errorf("Could not find /proc/meminfo. Are you sure you are on linux?")
+	}
+	defer memoryFile.Close()
+
+	fileReader := bufio.NewScanner(memoryFile)
+
+	var TotalMemory uint64
+	var AvailMemory uint64
+
+	for fileReader.Scan() {
+		line := fileReader.Text()
+
+		if strings.HasPrefix(line, "MemTotal:") {
+			TotalMemory, err = strconv.ParseUint(numberRegex.FindString(line), 10, 64)
+			if err != nil {
+				return MemoryInformation{}, fmt.Errorf("Could not parse total memory from /proc/meminfo")
+			}
+		} else if strings.HasPrefix(line, "MemAvailable:") {
+			AvailMemory, err = strconv.ParseUint(numberRegex.FindString(line), 10, 64)
+			if err != nil {
+				return MemoryInformation{}, fmt.Errorf("Could not parse available memory from /proc/meminfo")
+			}
+		}
+
+		if TotalMemory > 0 && AvailMemory > 0 {
+			break
+		}
+	}
+
+	if fileReader.Err() != nil {
+		return MemoryInformation{}, fmt.Errorf("There was an error while reading /proc/meninfo. Error: %v", fileReader.Err())
+	}
+
+	return MemoryInformation{
+		SystemMemory:    TotalMemory * 1024,
+		AvailableMemory: AvailMemory * 1024,
+	}, nil
+}
+
+func GetRamInformation() (MemoryInformation, error) {
+	return getLinuxRamInfo()
+}