wip: 重新整理 install cmd

This commit is contained in:
zhaoyupeng
2026-01-13 20:13:29 +08:00
parent fcbaa5be2f
commit 760784a5ac
15 changed files with 957 additions and 665 deletions

74
pkg/syscheck/cpu.go Normal file
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package syscheck
import (
"bufio"
"context"
"fmt"
"os"
"runtime"
"strconv"
"strings"
"golang.org/x/sys/cpu"
)
type CPUInfo struct {
Cores int64
FrequencyMHz int64
SupportAES bool
IsX86V2 bool
}
func GetCPUInfo(ctx context.Context) (CPUInfo, error) {
info := CPUInfo{
Cores: int64(runtime.NumCPU()),
}
// Parse /proc/cpuinfo to get CPU frequency and model info
file, err := os.Open("/proc/cpuinfo")
if err != nil {
return info, fmt.Errorf("failed to open /proc/cpuinfo: %w", err)
}
defer file.Close()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
line := scanner.Text()
// Parse CPU MHz
if strings.HasPrefix(line, "cpu MHz") {
parts := strings.Split(line, ":")
if len(parts) == 2 {
freqStr := strings.TrimSpace(parts[1])
if freq, err := strconv.ParseFloat(freqStr, 64); err == nil {
info.FrequencyMHz = int64(freq)
break // Get first CPU frequency
}
}
}
}
if err := scanner.Err(); err != nil {
return info, fmt.Errorf("failed to read /proc/cpuinfo: %w", err)
}
// Check CPU features using x/sys/cpu package
if runtime.GOARCH == "amd64" || runtime.GOARCH == "386" {
// Check AES-NI support
info.SupportAES = cpu.X86.HasAES
// Check x86-64-v2 support
// x86-64-v2 requires: SSE3, SSSE3, SSE4.1, SSE4.2, POPCNT
info.IsX86V2 = cpu.X86.HasSSE3 &&
cpu.X86.HasSSSE3 &&
cpu.X86.HasSSE41 &&
cpu.X86.HasSSE42 &&
cpu.X86.HasPOPCNT
} else {
// For ARM or other architectures
info.SupportAES = false
info.IsX86V2 = false
}
return info, nil
}

44
pkg/syscheck/cpu_test.go Normal file
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package syscheck
import (
"testing"
)
func TestGetCPUInfo(t *testing.T) {
info, err := GetCPUInfo(t.Context())
if err != nil {
t.Fatalf("Failed to get CPU info: %v", err)
}
// Validate CPU cores
if info.Cores <= 0 {
t.Errorf("expected CPU cores > 0, got %d", info.Cores)
}
// Validate CPU frequency (should be reasonable, e.g., 500MHz - 10000MHz)
if info.FrequencyMHz <= 0 {
t.Errorf("expected CPU frequency > 0, got %.2f", info.FrequencyMHz)
}
if info.FrequencyMHz < 500 || info.FrequencyMHz > 10000 {
t.Logf("Warning: CPU frequency seems unusual: %.2f MHz", info.FrequencyMHz)
}
// Log CPU information
t.Logf("CPU Cores: %d", info.Cores)
t.Logf("CPU Frequency: %.2f MHz (%.2f GHz)", info.FrequencyMHz, info.FrequencyMHz/1000)
t.Logf("AES-NI Support: %v", info.SupportAES)
t.Logf("x86-64-v2 Compatible: %v", info.IsX86V2)
// Log feature support
if info.SupportAES {
t.Log("✓ CPU supports AES-NI hardware acceleration")
} else {
t.Log("✗ CPU does not support AES-NI")
}
if info.IsX86V2 {
t.Log("✓ CPU is x86-64-v2 compatible (SSE3, SSSE3, SSE4.1, SSE4.2, POPCNT)")
} else {
t.Log("✗ CPU is not x86-64-v2 compatible")
}
}

157
pkg/syscheck/disk.go Normal file
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package syscheck
import (
"context"
"crypto/rand"
"fmt"
"io"
"os"
"strconv"
"time"
"golang.org/x/sys/unix"
)
// GetDiskSpace returns available disk space in bytes for the root partition
func GetDiskSpace(ctx context.Context) (int64, error) {
var stat unix.Statfs_t
if err := unix.Statfs("/", &stat); err != nil {
return 0, fmt.Errorf("failed to get disk space: %w", err)
}
// Available space = Available blocks * Block size
availableSpace := int64(stat.Bavail) * int64(stat.Bsize)
return availableSpace, nil
}
// GetDiskSpeed measures disk read/write speed by writing and reading a 1GB test file
// Returns read speed and write speed in bytes per second
func GetDiskSpeed(ctx context.Context) (int64, int64, error) {
const (
testSize = 1024 * 1024 * 1024 // 1GB
bufferSize = 1024 * 1024 // 1MB buffer
)
tmpFile := "/tmp/diskspeed_test_" + strconv.FormatInt(time.Now().UnixNano(), 10)
defer func() {
// Clean up test file
_ = os.Remove(tmpFile)
}()
// Test write speed
writeSpeed, err := measureWriteSpeed(ctx, tmpFile, testSize, bufferSize)
if err != nil {
return 0, 0, fmt.Errorf("failed to measure write speed: %w", err)
}
// Test read speed
readSpeed, err := measureReadSpeed(ctx, tmpFile, bufferSize)
if err != nil {
return 0, 0, fmt.Errorf("failed to measure read speed: %w", err)
}
return readSpeed, writeSpeed, nil
}
// measureWriteSpeed writes test data to a file and measures the speed
func measureWriteSpeed(ctx context.Context, filename string, totalSize, bufferSize int64) (int64, error) {
// Create file
file, err := os.Create(filename)
if err != nil {
return 0, fmt.Errorf("failed to create test file: %w", err)
}
defer file.Close()
// Prepare buffer with random data
buffer := make([]byte, bufferSize)
if _, err := rand.Read(buffer); err != nil {
return 0, fmt.Errorf("failed to generate random data: %w", err)
}
// Start timing
startTime := time.Now()
var written int64
// Write data in chunks
for written < totalSize {
// Check context cancellation
select {
case <-ctx.Done():
return 0, ctx.Err()
default:
}
// Write buffer
n, err := file.Write(buffer)
if err != nil {
return 0, fmt.Errorf("failed to write data: %w", err)
}
written += int64(n)
}
// Sync to ensure data is written to disk
if err := file.Sync(); err != nil {
return 0, fmt.Errorf("failed to sync file: %w", err)
}
// Calculate speed
duration := time.Since(startTime)
speed := int64(float64(written) / duration.Seconds())
return speed, nil
}
// measureReadSpeed reads the test file and measures the speed
func measureReadSpeed(ctx context.Context, filename string, bufferSize int64) (int64, error) {
// Open file
file, err := os.Open(filename)
if err != nil {
return 0, fmt.Errorf("failed to open test file: %w", err)
}
defer file.Close()
// Get file size
fileInfo, err := file.Stat()
if err != nil {
return 0, fmt.Errorf("failed to stat file: %w", err)
}
totalSize := fileInfo.Size()
// Prepare buffer
buffer := make([]byte, bufferSize)
// Start timing
startTime := time.Now()
var totalRead int64
// Read data in chunks
for {
// Check context cancellation
select {
case <-ctx.Done():
return 0, ctx.Err()
default:
}
// Read buffer
n, err := file.Read(buffer)
if err == io.EOF {
break
}
if err != nil {
return 0, fmt.Errorf("failed to read data: %w", err)
}
totalRead += int64(n)
}
// Calculate speed
duration := time.Since(startTime)
speed := int64(float64(totalRead) / duration.Seconds())
// Verify we read the entire file
if totalRead != totalSize {
return 0, fmt.Errorf("read size mismatch: expected %d, got %d", totalSize, totalRead)
}
return speed, nil
}

42
pkg/syscheck/disk_test.go Normal file
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package syscheck
import (
"context"
"testing"
)
func TestGetDiskSpace(t *testing.T) {
size, err := GetDiskSpace(context.Background())
if err != nil {
t.Fatalf("Failed to get disk space: %v", err)
}
if size <= 0 {
t.Errorf("expected disk space to be greater than 0, got %d", size)
}
t.Logf("Available disk space: %d bytes (%.2f GB)", size, float64(size)/(1024*1024*1024))
}
func TestGetDiskSpeed(t *testing.T) {
// Test with real disk I/O (warning: this writes 1GB to disk)
// Skip in short mode
if testing.Short() {
t.Skip("Skipping disk speed test in short mode")
}
rs, ws, err := GetDiskSpeed(context.Background())
if err != nil {
t.Fatalf("Failed to get disk speed: %v", err)
}
if rs <= 0 {
t.Errorf("expected read speed > 0, got %d", rs)
}
if ws <= 0 {
t.Errorf("expected write speed > 0, got %d", ws)
}
t.Logf("Read speed: %d bytes/s (%.2f MB/s)", rs, float64(rs)/(1024*1024))
t.Logf("Write speed: %d bytes/s (%.2f MB/s)", ws, float64(ws)/(1024*1024))
}

144
pkg/syscheck/mem.go Normal file
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package syscheck
import (
"context"
"crypto/rand"
"fmt"
"time"
"golang.org/x/sys/unix"
)
// GetMemorySpace returns total physical memory (RAM) in bytes, excluding swap
func GetMemorySpace(ctx context.Context) (int64, error) {
var info unix.Sysinfo_t
if err := unix.Sysinfo(&info); err != nil {
return 0, fmt.Errorf("failed to get memory info: %w", err)
}
// Total physical RAM (excluding swap)
// info.Totalram is in memory unit size (info.Unit)
totalMemory := int64(info.Totalram) * int64(info.Unit)
return totalMemory, nil
}
// GetMemorySpeed measures memory read/write speed by allocating and accessing memory
// Returns read speed and write speed in bytes per second
func GetMemorySpeed(ctx context.Context) (int64, int64, error) {
const (
testSize = 512 * 1024 * 1024 // 512MB test size
iterations = 5 // Number of iterations for averaging
)
// Test write speed
writeSpeed, err := measureMemoryWriteSpeed(ctx, testSize, iterations)
if err != nil {
return 0, 0, fmt.Errorf("failed to measure memory write speed: %w", err)
}
// Test read speed
readSpeed, err := measureMemoryReadSpeed(ctx, testSize, iterations)
if err != nil {
return 0, 0, fmt.Errorf("failed to measure memory read speed: %w", err)
}
return readSpeed, writeSpeed, nil
}
// measureMemoryWriteSpeed measures memory write speed
func measureMemoryWriteSpeed(ctx context.Context, size int64, iterations int) (int64, error) {
var totalDuration time.Duration
for i := 0; i < iterations; i++ {
// Check context cancellation
select {
case <-ctx.Done():
return 0, ctx.Err()
default:
}
// Allocate memory buffer
buffer := make([]byte, size)
// Generate random data
source := make([]byte, 1024*1024) // 1MB source buffer
if _, err := rand.Read(source); err != nil {
return 0, fmt.Errorf("failed to generate random data: %w", err)
}
// Start timing
startTime := time.Now()
// Write data to memory buffer
for offset := int64(0); offset < size; offset += int64(len(source)) {
remaining := size - offset
if remaining < int64(len(source)) {
copy(buffer[offset:], source[:remaining])
} else {
copy(buffer[offset:offset+int64(len(source))], source)
}
}
// Stop timing
duration := time.Since(startTime)
totalDuration += duration
// Force the buffer to be used to prevent optimization
_ = buffer[0]
}
// Calculate average speed
avgDuration := totalDuration / time.Duration(iterations)
speed := int64(float64(size) / avgDuration.Seconds())
return speed, nil
}
// measureMemoryReadSpeed measures memory read speed
func measureMemoryReadSpeed(ctx context.Context, size int64, iterations int) (int64, error) {
var totalDuration time.Duration
// Pre-allocate and fill buffer
buffer := make([]byte, size)
if _, err := rand.Read(buffer); err != nil {
return 0, fmt.Errorf("failed to initialize buffer: %w", err)
}
for i := 0; i < iterations; i++ {
// Check context cancellation
select {
case <-ctx.Done():
return 0, ctx.Err()
default:
}
// Start timing
startTime := time.Now()
// Read data from memory buffer
var sum int64
for offset := int64(0); offset < size; offset += 1024 {
// Read in chunks to simulate real access patterns
end := offset + 1024
if end > size {
end = size
}
for j := offset; j < end; j++ {
sum += int64(buffer[j])
}
}
// Stop timing
duration := time.Since(startTime)
totalDuration += duration
// Use sum to prevent optimization
_ = sum
}
// Calculate average speed
avgDuration := totalDuration / time.Duration(iterations)
speed := int64(float64(size) / avgDuration.Seconds())
return speed, nil
}

42
pkg/syscheck/mem_test.go Normal file
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package syscheck
import (
"context"
"testing"
)
func TestGetMemorySpace(t *testing.T) {
size, err := GetMemorySpace(context.Background())
if err != nil {
t.Fatalf("Failed to get memory space: %v", err)
}
if size <= 0 {
t.Errorf("expected memory space to be greater than 0, got %d", size)
}
t.Logf("Total physical memory: %d bytes (%.2f GB)", size, float64(size)/(1024*1024*1024))
}
func TestGetMemorySpeed(t *testing.T) {
// Test memory speed (may take a few seconds)
// Skip in short mode
if testing.Short() {
t.Skip("Skipping memory speed test in short mode")
}
rs, ws, err := GetMemorySpeed(context.Background())
if err != nil {
t.Fatalf("Failed to get memory speed: %v", err)
}
if rs <= 0 {
t.Errorf("expected read speed > 0, got %d", rs)
}
if ws <= 0 {
t.Errorf("expected write speed > 0, got %d", ws)
}
t.Logf("Memory read speed: %d bytes/s (%.2f GB/s)", rs, float64(rs)/(1024*1024*1024))
t.Logf("Memory write speed: %d bytes/s (%.2f GB/s)", ws, float64(ws)/(1024*1024*1024))
}

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@@ -1,318 +0,0 @@
package syscheck
import (
"context"
"fmt"
"strconv"
"strings"
)
// CheckResult represents the result of a system check
type CheckResult struct {
Name string
Passed bool
Actual string
Expected string
Message string
}
// DiskInfo represents disk information
type DiskInfo struct {
AvailableGB float64
WriteSpeed float64 // MB/s
ReadSpeed float64 // MB/s
}
// MemInfo represents memory information
type MemInfo struct {
TotalGB float64
}
// CPUInfo represents CPU information
type CPUInfo struct {
Cores int
FrequencyMHz float64
}
// CommandExecutor defines interface for executing commands
type CommandExecutor interface {
ExecuteCommand(ctx context.Context, cmds ...string) (string, error)
}
// CheckDiskSpace checks if disk space meets minimum requirements
func CheckDiskSpace(ctx context.Context, executor CommandExecutor, minGB float64) (*CheckResult, error) {
// Use df to check available disk space on root partition
output, err := executor.ExecuteCommand(ctx, "df", "-BG", "/")
if err != nil {
return nil, fmt.Errorf("failed to check disk space: %w", err)
}
lines := strings.Split(strings.TrimSpace(output), "\n")
if len(lines) < 2 {
return nil, fmt.Errorf("unexpected df output format")
}
fields := strings.Fields(lines[1])
if len(fields) < 4 {
return nil, fmt.Errorf("unexpected df fields count")
}
// Parse available space (4th field, format: "500G")
availableStr := strings.TrimSuffix(fields[3], "G")
available, err := strconv.ParseFloat(availableStr, 64)
if err != nil {
return nil, fmt.Errorf("failed to parse available disk space: %w", err)
}
result := &CheckResult{
Name: "Disk Space",
Passed: available >= minGB,
Actual: fmt.Sprintf("%.2f GB", available),
Expected: fmt.Sprintf(">= %.2f GB", minGB),
}
if !result.Passed {
result.Message = fmt.Sprintf("Insufficient disk space: %.2f GB available, %.2f GB required", available, minGB)
}
return result, nil
}
// CheckDiskPerformance checks disk read/write performance
func CheckDiskPerformance(ctx context.Context, executor CommandExecutor, minWriteMBps, minReadMBps float64) (*CheckResult, error) {
// Use dd to test write performance
writeCmd := "dd if=/dev/zero of=/tmp/test_write bs=1M count=1024 oflag=direct 2>&1 | tail -1"
writeOutput, err := executor.ExecuteCommand(ctx, "bash", "-c", writeCmd)
if err != nil {
return nil, fmt.Errorf("failed to check disk write performance: %w", err)
}
// Parse write speed from dd output (format: "... copied, X.XX s, XXX MB/s")
writeSpeed, err := parseDDSpeed(writeOutput)
if err != nil {
return nil, fmt.Errorf("failed to parse write speed: %w, output: %s", err, writeOutput)
}
// Test read performance and clean up test file
readCmd := "dd if=/tmp/test_write of=/dev/null bs=1M count=1024 iflag=direct 2>&1 | tail -1; rm -f /tmp/test_write"
readOutput, err := executor.ExecuteCommand(ctx, "bash", "-c", readCmd)
if err != nil {
return nil, fmt.Errorf("failed to check disk read performance: %w", err)
}
// Parse read speed from dd output
readSpeed, err := parseDDSpeed(readOutput)
if err != nil {
return nil, fmt.Errorf("failed to parse read speed: %w, output: %s", err, readOutput)
}
passed := writeSpeed >= minWriteMBps && readSpeed >= minReadMBps
result := &CheckResult{
Name: "Disk Performance",
Passed: passed,
Actual: fmt.Sprintf("Write: %.2f MB/s, Read: %.2f MB/s", writeSpeed, readSpeed),
Expected: fmt.Sprintf("Write: >= %.2f MB/s, Read: >= %.2f MB/s", minWriteMBps, minReadMBps),
}
if !passed {
result.Message = fmt.Sprintf("Insufficient disk performance")
}
return result, nil
}
// parseDDSpeed parses the speed from dd command output
// Expected format: "104857600 bytes (105 MB, 100 MiB) copied, 0.125749 s, 834 MB/s"
func parseDDSpeed(output string) (float64, error) {
output = strings.TrimSpace(output)
if output == "" {
return 0, fmt.Errorf("empty output")
}
// Find the last occurrence of "MB/s" or "GB/s"
var speed float64
var unit string
// Try to match "XXX MB/s" or "XXX GB/s" pattern
if idx := strings.LastIndex(output, " MB/s"); idx != -1 {
// Extract the number before " MB/s"
fields := strings.Fields(output[:idx])
if len(fields) == 0 {
return 0, fmt.Errorf("no speed value found")
}
speedStr := fields[len(fields)-1]
var err error
speed, err = strconv.ParseFloat(speedStr, 64)
if err != nil {
return 0, fmt.Errorf("failed to parse speed value '%s': %w", speedStr, err)
}
unit = "MB/s"
} else if idx := strings.LastIndex(output, " GB/s"); idx != -1 {
// Extract the number before " GB/s"
fields := strings.Fields(output[:idx])
if len(fields) == 0 {
return 0, fmt.Errorf("no speed value found")
}
speedStr := fields[len(fields)-1]
var err error
speed, err = strconv.ParseFloat(speedStr, 64)
if err != nil {
return 0, fmt.Errorf("failed to parse speed value '%s': %w", speedStr, err)
}
unit = "GB/s"
speed *= 1024 // Convert GB/s to MB/s
} else {
return 0, fmt.Errorf("no MB/s or GB/s found in output")
}
if unit == "MB/s" || unit == "GB/s" {
return speed, nil
}
return 0, fmt.Errorf("unexpected unit: %s", unit)
}
// CheckMemory checks if system memory meets minimum requirements
func CheckMemory(ctx context.Context, executor CommandExecutor, minGB float64) (*CheckResult, error) {
// Use free -m to check memory in MB for better precision
output, err := executor.ExecuteCommand(ctx, "free", "-m")
if err != nil {
return nil, fmt.Errorf("failed to check memory: %w", err)
}
lines := strings.Split(strings.TrimSpace(output), "\n")
if len(lines) < 2 {
return nil, fmt.Errorf("unexpected free output format")
}
fields := strings.Fields(lines[1])
if len(fields) < 2 {
return nil, fmt.Errorf("unexpected free fields count")
}
// Parse total memory in MB
totalMB, err := strconv.ParseFloat(fields[1], 64)
if err != nil {
return nil, fmt.Errorf("failed to parse memory size: %w", err)
}
// Convert MB to GB (1 GB = 1024 MB)
totalGB := totalMB / 1024.0
result := &CheckResult{
Name: "Memory Size",
Passed: totalGB >= minGB,
Actual: fmt.Sprintf("%.2f GB", totalGB),
Expected: fmt.Sprintf(">= %.2f GB", minGB),
}
if !result.Passed {
result.Message = fmt.Sprintf("Insufficient memory: %.2f GB available, %.2f GB required", totalGB, minGB)
}
return result, nil
}
// CheckCPUCores checks if CPU core count meets minimum requirements
func CheckCPUCores(ctx context.Context, executor CommandExecutor, minCores int) (*CheckResult, error) {
// Read /proc/cpuinfo to get CPU core count (more universal than nproc)
output, err := executor.ExecuteCommand(ctx, "cat", "/proc/cpuinfo")
if err != nil {
return nil, fmt.Errorf("failed to check CPU cores: %w", err)
}
// Count the number of "processor" lines
cores := 0
lines := strings.Split(output, "\n")
for _, line := range lines {
if strings.HasPrefix(strings.TrimSpace(line), "processor") {
cores++
}
}
if cores == 0 {
return nil, fmt.Errorf("failed to parse CPU cores from /proc/cpuinfo")
}
result := &CheckResult{
Name: "CPU Cores",
Passed: cores >= minCores,
Actual: fmt.Sprintf("%d cores", cores),
Expected: fmt.Sprintf(">= %d cores", minCores),
}
if !result.Passed {
result.Message = fmt.Sprintf("Insufficient CPU cores: %d cores available, %d cores required", cores, minCores)
}
return result, nil
}
// CheckCPUFrequency checks if CPU frequency meets minimum requirements
func CheckCPUFrequency(ctx context.Context, executor CommandExecutor, minGHz float64) (*CheckResult, error) {
// Read /proc/cpuinfo to get CPU frequency (more universal than lscpu)
output, err := executor.ExecuteCommand(ctx, "cat", "/proc/cpuinfo")
if err != nil {
return nil, fmt.Errorf("failed to check CPU frequency: %w", err)
}
var maxFreqMHz float64
lines := strings.Split(output, "\n")
// Try to parse from "cpu MHz" field (runtime frequency)
for _, line := range lines {
line = strings.TrimSpace(line)
if strings.HasPrefix(line, "cpu MHz") {
fields := strings.Split(line, ":")
if len(fields) >= 2 {
freqStr := strings.TrimSpace(fields[1])
freq, err := strconv.ParseFloat(freqStr, 64)
if err == nil && freq > maxFreqMHz {
maxFreqMHz = freq
}
}
}
}
// If not found, try to parse from "model name" field (base frequency)
if maxFreqMHz == 0 {
for _, line := range lines {
line = strings.TrimSpace(line)
if strings.HasPrefix(line, "model name") {
// Look for pattern like "@ 2.60GHz"
if idx := strings.Index(line, "@"); idx != -1 {
freqPart := line[idx+1:]
// Extract GHz value
if ghzIdx := strings.Index(freqPart, "GHz"); ghzIdx != -1 {
freqStr := strings.TrimSpace(freqPart[:ghzIdx])
freqGHz, err := strconv.ParseFloat(freqStr, 64)
if err == nil {
maxFreqMHz = freqGHz * 1000.0
break
}
}
}
}
}
}
if maxFreqMHz == 0 {
return nil, fmt.Errorf("failed to parse CPU frequency from /proc/cpuinfo")
}
freqGHz := maxFreqMHz / 1000.0
minMHz := minGHz * 1000.0
result := &CheckResult{
Name: "CPU Frequency",
Passed: maxFreqMHz >= minMHz,
Actual: fmt.Sprintf("%.2f GHz", freqGHz),
Expected: fmt.Sprintf(">= %.2f GHz", minGHz),
}
if !result.Passed {
result.Message = fmt.Sprintf("Insufficient CPU frequency: %.2f GHz available, %.2f GHz required", freqGHz, minGHz)
}
return result, nil
}

50
pkg/tool/human/size.go Normal file
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package human
import "fmt"
func Duration(nano int64) string {
duration := float64(nano)
unit := "ns"
if duration >= 1000 {
duration /= 1000
unit = "us"
}
if duration >= 1000 {
duration /= 1000
unit = "ms"
}
if duration >= 1000 {
duration /= 1000
unit = " s"
}
return fmt.Sprintf("%6.2f%s", duration, unit)
}
func Size(size int64) string {
const (
_ = iota
KB = 1 << (10 * iota) // 1 KB = 1024 bytes
MB // 1 MB = 1024 KB
GB // 1 GB = 1024 MB
TB // 1 TB = 1024 GB
PB // 1 PB = 1024 TB
)
switch {
case size >= PB:
return fmt.Sprintf("%.2f PB", float64(size)/PB)
case size >= TB:
return fmt.Sprintf("%.2f TB", float64(size)/TB)
case size >= GB:
return fmt.Sprintf("%.2f GB", float64(size)/GB)
case size >= MB:
return fmt.Sprintf("%.2f MB", float64(size)/MB)
case size >= KB:
return fmt.Sprintf("%.2f KB", float64(size)/KB)
default:
return fmt.Sprintf("%d bytes", size)
}
}