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docs/olddocs/system_zh-CN.md

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+# System
+
+system 包含 os, runtime, shell command 相关函数。
+
+<div STYLE="page-break-after: always;"></div>
+
+## 源码:
+
+-   [https://github.com/duke-git/lancet/blob/main/system/os.go](https://github.com/duke-git/lancet/blob/main/system/os.go)
+
+<div STYLE="page-break-after: always;"></div>
+
+## 用法:
+
+```go
+import (
+    "github.com/duke-git/lancet/v2/system"
+)
+```
+
+<div STYLE="page-break-after: always;"></div>
+
+## 目录
+
+-   [IsWindows](#IsWindows)
+-   [IsLinux](#IsLinux)
+-   [IsMac](#IsMac)
+-   [GetOsEnv](#GetOsEnv)
+-   [SetOsEnv](#SetOsEnv)
+-   [RemoveOsEnv](#RemoveOsEnv)
+-   [CompareOsEnv](#CompareOsEnv)
+-   [ExecCommand](#ExecCommand)
+-   [GetOsBits](#GetOsBits)
+
+<div STYLE="page-break-after: always;"></div>
+
+## 文档
+
+### <span id="IsWindows">IsWindows</span>
+
+<p>检查当前操作系统是否是windows</p>
+
+<b>函数签名:</b>
+
+```go
+func IsWindows() bool
+```
+
+<b>示例:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/system"
+)
+
+func main() {
+    isOsWindows := system.IsWindows()
+    fmt.Println(isOsWindows)
+}
+```
+
+### <span id="IsLinux">IsLinux</span>
+
+<p>检查当前操作系统是否是linux</p>
+
+<b>函数签名:</b>
+
+```go
+func IsLinux() bool
+```
+
+<b>示例:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/system"
+)
+
+func main() {
+    isOsLinux := system.IsLinux()
+    fmt.Println(isOsLinux)
+}
+```
+
+### <span id="IsMac">IsMac</span>
+
+<p>检查当前操作系统是否是macos</p>
+
+<b>函数签名:</b>
+
+```go
+func IsMac() bool
+```
+
+<b>示例:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/system"
+)
+
+func main() {
+    isOsMac := system.IsMac()
+    fmt.Println(isOsMac)
+}
+```
+
+### <span id="GetOsEnv">GetOsEnv</span>
+
+<p>获取key命名的环境变量的值</p>
+
+<b>函数签名:</b>
+
+```go
+func GetOsEnv(key string) string
+```
+
+<b>示例:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/system"
+)
+
+func main() {
+    err := system.SetOsEnv("foo", "abc")
+    result := system.GetOsEnv("foo")
+
+    fmt.Println(err)
+    fmt.Println(result)
+    // Output:
+    // <nil>
+    // abc
+}
+```
+
+### <span id="SetOsEnv">SetOsEnv</span>
+
+<p>设置由key命名的环境变量的值</p>
+
+<b>函数签名:</b>
+
+```go
+func SetOsEnv(key, value string) error
+```
+
+<b>示例:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/system"
+)
+
+func main() {
+    err := system.SetOsEnv("foo", "abc")
+    result := system.GetOsEnv("foo")
+
+    fmt.Println(err)
+    fmt.Println(result)
+    // Output:
+    // <nil>
+    // abc
+}
+```
+
+### <span id="RemoveOsEnv">RemoveOsEnv</span>
+
+<p>删除单个环境变量</p>
+
+<b>函数签名:</b>
+
+```go
+func RemoveOsEnv(key string) error
+```
+
+<b>示例:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/system"
+)
+
+func main() {
+    err1 := system.SetOsEnv("foo", "abc")
+    result1 := GetOsEnv("foo")
+
+    err2 := system.RemoveOsEnv("foo")
+    result2 := GetOsEnv("foo")
+
+    fmt.Println(err1)
+    fmt.Println(err2)
+    fmt.Println(result1)
+    fmt.Println(result2)
+
+    // Output:
+    // <nil>
+    // <nil>
+    // abc
+    //
+}
+```
+
+### <span id="CompareOsEnv">CompareOsEnv</span>
+
+<p>获取key命名的环境变量值并与compareEnv进行比较</p>
+
+<b>函数签名:</b>
+
+```go
+func CompareOsEnv(key, comparedEnv string) bool
+```
+
+<b>示例:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/system"
+)
+
+func main() {
+    err := system.SetOsEnv("foo", "abc")
+    if err != nil {
+        return
+    }
+
+    result := system.CompareOsEnv("foo", "abc")
+
+    fmt.Println(result)
+
+    // Output:
+    // true
+}
+```
+
+### <span id="ExecCommand">ExecCommand</span>
+
+<p>执行shell命令，返回命令的stdout和stderr字符串，如果出现错误，则返回错误。参数`command`是一个完整的命令字符串，如ls-a（linux），dir（windows），ping 127.0.0.1。在linux中，使用/bin/bash-c执行命令，在windows中，使用powershell.exe执行命令。</p>
+
+<b>函数签名:</b>
+
+```go
+type (
+	Option func(*exec.Cmd)
+)
+func ExecCommand(command string, opts ...Option) (stdout, stderr string, err error)
+```
+
+<b>示例:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/system"
+)
+
+func main() {
+    // linux or mac
+    stdout, stderr, err := system.ExecCommand("ls")
+    fmt.Println("std out: ", stdout)
+    fmt.Println("std err: ", stderr)
+    assert.Equal("", stderr)
+
+    // windows
+    stdout, stderr, err = system.ExecCommand("dir")
+    fmt.Println("std out: ", stdout)
+    fmt.Println("std err: ", stderr)
+
+    // error command
+    stdout, stderr, err = system.ExecCommand("abc")
+    fmt.Println("std out: ", stdout)
+    fmt.Println("std err: ", stderr)
+    if err != nil {
+        fmt.Println(err.Error())
+    }
+}
+```
+
+### <span id="GetOsBits">GetOsBits</span>
+
+<p>获取当前操作系统位数，返回32或64</p>
+
+<b>函数签名:</b>
+
+```go
+func GetOsBits() int
+```
+
+<b>示例:</b>
+
+```go
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/system"
+)
+
+func main() {
+    osBit := system.GetOsBits()
+    fmt.Println(osBit) // 32 or 64
+}
+```