add SPDX License, remove old build tag, and replace import

README.md

@@ -5,7 +5,13 @@
 This is a port of psutil (https://github.com/giampaolo/psutil). The
 challenge is porting all psutil functions on some architectures.
 
-## v3 migration
+## migration
+
+### v4 migration
+
+See v4 release note.
+
+### v3 migration
 
 From v3.20.10, gopsutil becomes v3 which breaks backwards compatibility.
 See [v3Changes.md](_tools/v3migration/v3Changes.md) for more detailed changes.
@@ -15,10 +21,10 @@ See [v3Changes.md](_tools/v3migration/v3Changes.md) for more detailed changes.
 gopsutil tag policy is almost same as Semantic Versioning, but
 automatically increases like [Ubuntu versioning](https://calver.org/).
 
-For example, v2.17.04 means
+For example, v4.24.04 means
 
-- v2: major version
-- 17: release year, 2017
+- v4: major version
+- 24: release year, 2024
 - 04: release month
 
 gopsutil aims to keep backwards compatibility until major version change.
@@ -52,7 +58,7 @@ package main
 import (
     "fmt"
 
-    "github.com/shirou/gopsutil/v3/mem"
+    "github.com/shirou/gopsutil/v4/mem"
     // "github.com/shirou/gopsutil/mem"  // to use v2
 )
 
@@ -122,11 +128,11 @@ Be very careful that enabling the cache may cause inconsistencies. For example,
 
 ## Documentation
 
-See https://pkg.go.dev/github.com/shirou/gopsutil/v3 or https://godocs.io/github.com/shirou/gopsutil/v3
+See https://pkg.go.dev/github.com/shirou/gopsutil/v4 or https://godocs.io/github.com/shirou/gopsutil/v4
 
 ## Requirements
 
-- go1.16 or above is required.
+- go1.20 or above is required.
 
 ## More Info
 

common/env.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package common
 
 type EnvKeyType string

cpu/cpu.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 import (
@@ -11,7 +12,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 )
 
 // TimesStat contains the amounts of time the CPU has spent performing different

cpu/cpu_aix.go

@@ -1,5 +1,5 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build aix
-// +build aix
 
 package cpu
 

cpu/cpu_aix_cgo.go

@@ -1,5 +1,5 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build aix && cgo
-// +build aix,cgo
 
 package cpu
 

cpu/cpu_aix_nocgo.go

@@ -1,5 +1,5 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build aix && !cgo
-// +build aix,!cgo
 
 package cpu
 
@@ -8,7 +8,7 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 )
 
 func TimesWithContext(ctx context.Context, percpu bool) ([]TimesStat, error) {

cpu/cpu_darwin.go

@@ -1,5 +1,5 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build darwin
-// +build darwin
 
 package cpu
 

cpu/cpu_darwin_cgo.go

@@ -1,5 +1,5 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build darwin && cgo
-// +build darwin,cgo
 
 package cpu
 

cpu/cpu_darwin_nocgo.go

@@ -1,9 +1,9 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build darwin && !cgo
-// +build darwin,!cgo
 
 package cpu
 
-import "github.com/shirou/gopsutil/v3/internal/common"
+import "github.com/shirou/gopsutil/v4/internal/common"
 
 func perCPUTimes() ([]TimesStat, error) {
 	return []TimesStat{}, common.ErrNotImplementedError

cpu/cpu_darwin_test.go

@@ -1,5 +1,5 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build darwin
-// +build darwin
 
 package cpu
 

cpu/cpu_dragonfly.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 import (
@@ -10,7 +11,7 @@ import (
 	"strings"
 	"unsafe"
 
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 	"github.com/tklauser/go-sysconf"
 	"golang.org/x/sys/unix"
 )

cpu/cpu_dragonfly_amd64.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 type cpuTimes struct {

cpu/cpu_fallback.go

@@ -1,13 +1,13 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build !darwin && !linux && !freebsd && !openbsd && !netbsd && !solaris && !windows && !dragonfly && !plan9 && !aix
-// +build !darwin,!linux,!freebsd,!openbsd,!netbsd,!solaris,!windows,!dragonfly,!plan9,!aix
 
 package cpu
 
 import (
 	"context"
 	"runtime"
 
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 )
 
 func Times(percpu bool) ([]TimesStat, error) {

cpu/cpu_freebsd.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 import (
@@ -10,7 +11,7 @@ import (
 	"strings"
 	"unsafe"
 
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 	"github.com/tklauser/go-sysconf"
 	"golang.org/x/sys/unix"
 )

cpu/cpu_freebsd_386.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 type cpuTimes struct {

cpu/cpu_freebsd_amd64.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 type cpuTimes struct {

cpu/cpu_freebsd_arm.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 type cpuTimes struct {

cpu/cpu_freebsd_arm64.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 type cpuTimes struct {

cpu/cpu_freebsd_test.go

@@ -1,11 +1,12 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 import (
 	"path/filepath"
 	"runtime"
 	"testing"
 
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 )
 
 func TestParseDmesgBoot(t *testing.T) {

cpu/cpu_linux.go

@@ -1,5 +1,5 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build linux
-// +build linux
 
 package cpu
 
@@ -13,7 +13,7 @@ import (
 
 	"github.com/tklauser/go-sysconf"
 
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 )
 
 var ClocksPerSec = float64(100)

cpu/cpu_linux_test.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 import (

cpu/cpu_netbsd.go

@@ -1,5 +1,5 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build netbsd
-// +build netbsd
 
 package cpu
 
@@ -9,7 +9,7 @@ import (
 	"runtime"
 	"unsafe"
 
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 	"github.com/tklauser/go-sysconf"
 	"golang.org/x/sys/unix"
 )

cpu/cpu_netbsd_amd64.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 type cpuTimes struct {

cpu/cpu_netbsd_arm64.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 type cpuTimes struct {

cpu/cpu_openbsd.go

@@ -1,5 +1,5 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build openbsd
-// +build openbsd
 
 package cpu
 
@@ -9,7 +9,7 @@ import (
 	"runtime"
 	"unsafe"
 
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 	"github.com/tklauser/go-sysconf"
 	"golang.org/x/sys/unix"
 )

cpu/cpu_openbsd_386.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 type cpuTimes struct {

cpu/cpu_openbsd_amd64.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 type cpuTimes struct {

cpu/cpu_openbsd_arm.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 type cpuTimes struct {

cpu/cpu_openbsd_arm64.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 type cpuTimes struct {

cpu/cpu_openbsd_riscv64.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 type cpuTimes struct {

cpu/cpu_plan9.go

@@ -1,5 +1,5 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build plan9
-// +build plan9
 
 package cpu
 
@@ -9,7 +9,7 @@ import (
 	"runtime"
 
 	stats "github.com/lufia/plan9stats"
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 )
 
 func Times(percpu bool) ([]TimesStat, error) {

cpu/cpu_plan9_test.go

@@ -1,5 +1,5 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build plan9
-// +build plan9
 
 package cpu
 

cpu/cpu_solaris.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 import (

cpu/cpu_solaris_test.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 import (

cpu/cpu_test.go

@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package cpu
 
 import (
@@ -10,7 +11,7 @@ import (
 
 	"github.com/stretchr/testify/assert"
 
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 )
 
 func skipIfNotImplementedErr(t *testing.T, err error) {

cpu/cpu_windows.go

@@ -1,5 +1,5 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build windows
-// +build windows
 
 package cpu
 
@@ -8,7 +8,7 @@ import (
 	"fmt"
 	"unsafe"
 
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 	"github.com/yusufpapurcu/wmi"
 	"golang.org/x/sys/windows"
 )

disk/disk.go

@@ -1,10 +1,11 @@
+// SPDX-License-Identifier: BSD-3-Clause
 package disk
 
 import (
 	"context"
 	"encoding/json"
 
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 )
 
 var invoke common.Invoker = common.Invoke{}

disk/disk_aix.go

@@ -1,12 +1,12 @@
+// SPDX-License-Identifier: BSD-3-Clause
 //go:build aix
-// +build aix
 
 package disk
 
 import (
 	"context"
 
-	"github.com/shirou/gopsutil/v3/internal/common"
+	"github.com/shirou/gopsutil/v4/internal/common"
 )
 
 func IOCountersWithContext(ctx context.Context, names ...string) (map[string]IOCountersStat, error) {