kcommand 是基于 Kotlin 特性实现的，执行 Linux/Windows 命令的库
- 简洁的命令执行方式
- 支持命令执行的超时机制
- 对 sudo 命令提供额外的支持
- 支持函数式
- 支持 CompletableFuture、RxJava 2、RxJava 3、Kotlin Coroutines
| 模块 | 最新版本 |
|---|---|
| kcommand-core |  |
| kcommand-rxjava2 | |
| kcommand-rxjava3 | |
| kcommand-coroutines | |
将它添加到项目的 root build.gradle 中：
allprojects {
repositories {
...
maven { url 'https://jitpack.io' }
}
}implementation 'com.github.fengzhizi715.kcommand:core:v1.4.0'implementation 'com.github.fengzhizi715.kcommand:rxjava2:v1.4.0'implementation 'com.github.fengzhizi715.kcommand:rxjava3:v1.4.0'implementation 'com.github.fengzhizi715.kcommand:coroutines:v1.4.0'首先，需要通过 CommandBuilder 类构建执行的命令，这些命令支持携带参数。
然后，通过 CommandExecutor.execute() 执行命令。
CommandExecutor.execute(CommandBuilder("ping").addArg("baidu.com").build())更为简洁的写法：
CommandExecutor.execute("ping baidu.com")或者：
CommandExecutor.execute{ "ping baidu.com" }CommandExecutor 的 execute() 会返回 ProcessResult 对象。然后通过 ProcessResult 的 getExecutionResult() 获取命令执行的状态。
例如：
CommandExecutor.executeCmd {
val list = mutableListOf<String>()
list.add("sh")
list.add("-c")
val psCommand = "ps aux | grep java"
list.add(psCommand)
CommandBuilder.buildRawCommand(psCommand, list.toTypedArray())
}.getExecutionResult().let {
val commandLine = it.command().string()
val exitCode = it.exitValue()
println("command line: $commandLine\nexecution finished with exit code: $exitCode\n\n")
}开发者可以使用 Append 在回调中获取命令执行的内容。
fun getPsCmd():Command {
val list = mutableListOf<String>()
list.add("sh")
list.add("-c")
val psCommand = "ps aux | grep java"
list.add(psCommand)
return CommandBuilder.buildRawCommand(psCommand, list.toTypedArray())
}
fun main() {
val cmd = getPsCmd()
CommandExecutor.execute(cmd, null, appender = object : Appender {
override fun appendStdText(text: String) {
println(text)
}
override fun appendErrText(text: String) {
System.err.println(text)
}
}).getExecutionResult().let {
val commandLine = cmd.string()
val exitCode = it.exitValue()
println("command line: $commandLine\nexecution finished with exit code: $exitCode\n\n")
}
}通过使用 CommandBuilder.buildCompositeCommand() 构造所需的复合命令，例如管道命令等
val cmd = CommandBuilder.buildCompositeCommand("ps aux | grep java")
CommandExecutor.execute(cmd).getExecutionResult().let {
val commandLine = cmd.string()
val exitCode = it.exitValue()
println("command line: $commandLine\nexecution finished with exit code: $exitCode\n\n")
}支持 sudo 命令执行一些 Linux 管理员使用的命令。
通过使用 buildSudoCommand() 方法构建 Command，需要传递 Linux 管理员的密码和执行的命令。
val cmd = CommandBuilder.buildSudoCommand("xxx","dmidecode")
CommandExecutor.execute(cmd).getExecutionResult().let {
val commandLine = cmd.string()
val exitCode = it.exitValue()
println("command line: $commandLine\nexecution finished with exit code: $exitCode\n\n")
}通过使用 buildWindowsCommand() 方法构建 Command
val cmd = CommandBuilder.buildWindowsCommand("dir")通过 ProcessResult 的扩展函数asCompletableFuture()等，返回 CompletableFuture 对象
val cmd = CommandBuilder.buildCompositeCommand("ps aux | grep java")
val executionResult = CommandExecutor.execute(cmd).asCompletableFuture().get()
val commandLine = cmd.string()
val exitCode = executionResult.exitValue()
println("command line: $commandLine\nexecution finished with exit code: $exitCode\n\n")通过 ProcessResult 的扩展函数asObservable()等，支持 RxJava2、3
val cmd = CommandBuilder.buildCompositeCommand("ps aux | grep java")
CommandExecutor.execute(cmd)
.asObservable()
.subscribe {
val commandLine = cmd.string()
val exitCode = it.exitValue()
println("command line: $commandLine\nexecution finished with exit code: $exitCode\n\n")
}或者
val cmd = CommandBuilder.buildCompositeCommand("ps aux | grep java")
val sb = StringBuilder()
CommandExecutor.executeSync(cmd = cmd,appender = object : Appender{
override fun appendStdText(text: String) {
if (text.contains(cmd.string())) {
sb.append(text)
}
}
override fun appendErrText(text: String) {
TODO("Not yet implemented")
}
}).asObservable {
sb.toString()
}.subscribe {
println(it)
}通过 ProcessResult 的getResult()返回的 Result 支持函数式，
Result 可以点击查看。
val cmd = CommandBuilder.buildCompositeCommand("ps aux | grep java")
val result = CommandExecutor.execute(cmd).getResult().get()
if (result is ExecutionResult) {
val commandLine = cmd.string()
val exitCode = result.exitValue()
println("command line: $commandLine\nexecution finished with exit code: $exitCode\n\n")
}通过 ProcessResult 的扩展函数asFlow()，返回 Flow 对象
fun main() = runBlocking{
val cmd = CommandBuilder.buildCompositeCommand("ps aux | grep java")
CommandExecutor.execute(cmd)
.asFlow()
.collect{
val commandLine = cmd.string()
val exitCode = it.exitValue()
println("command line: $commandLine\nexecution finished with exit code: $exitCode\n\n")
}
}使用 CommandExecutor.executeSync() 支持同步执行。
其实 kcommand 底层使用的是线程池，只是等待线程执行完成后将结果同步返回到 Append 。
executeSync() 方法还支持超时机制，有2个参数分别表示超时的时间、时间的单位。
val cmd = CommandBuilder("ping").addArg("baidu.com").build()
CommandExecutor.executeSync(cmd, null,5, TimeUnit.SECONDS,object :Appender{
override fun appendStdText(text: String) {
println(text)
}
override fun appendErrText(text: String) {
System.err.println(text)
}
}).getExecutionResult().let {
val commandLine = it.command().string()
val exitCode = it.exitValue()
println("command line: $commandLine\nexecution finished with exit code: $exitCode\n\n")
}通过 getExecutionResult() 方法进行异步超时。
该方法在调用 CommandExecutor.executeSync() 会无效。
val cmd = CommandBuilder("ping").addArg("baidu.com").build()
CommandExecutor.execute(cmd, null).getExecutionResult(5,TimeUnit.SECONDS).let {
val commandLine = it.command().string()
val exitCode = it.exitValue()
println("command line: $commandLine\nexecution finished with exit code: $exitCode\n\n")
}通过 getStringWithSync() 方法会同步返回命令的执行结果。
val cmd = CommandBuilder.buildCompositeCommand("ps aux | grep java")
val result = CommandExecutor.getStringWithSync(cmd, appender = object :Appender{
override fun appendStdText(text: String) {
}
override fun appendErrText(text: String) {
System.err.println(text)
}
})
println(result)CommandExecutor 有多个类似 getStringWithSync() 的扩展函数。
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