我想使用expect重定向jshell输入,这样我就可以模拟输入录制的演示。但是,虽然我可以从一个期望脚本生成一个 jshell 进程,它也可以识别 jshell 提示符,但在那之后就没有任何效果了。期望输出看起来像控制序列的东西,比如^[[24;9R
,我没有看到来自 jshell 的任何输出。不同的终端类型产生不同的字符序列,但它们都不起作用。这种行为在 Ubuntu 和 Mac OS 上的期望是一致的。欢迎任何有关如何调查此问题的建议。expect -d
没有帮助。
这是我要模拟的 jshell 会话的记录
$ jshell
| Welcome to JShell -- Version 9.0.1
| For an introduction type: /help intro
jshell> 3
$1 ==> 3
jshell>
这是我认为应该这样做的脚本:
#!/usr/bin/expect -f
spawn jshell
expect jshell>
send "3\r"
expect jshell>
当我运行该脚本(在 Mac OS 10.11.6 上,但在 Ubuntu 上得到非常相似的结果)时,我看到了这个输出
spawn jshell
| Welcome to JShell -- Version 9.0.1
| For an introduction type: /help intro
jshell> ^[[24;9R
然后期望超时,并且最后一行输出被 shell 提示符覆盖(因此看起来好像在超时时正在写入更多控制字符)。
添加-d
到脚本第 1 行中的期望标志会产生以下输出:
expect version 5.45
argv[0] = /usr/bin/expect argv[1] = -d argv[2] = -f argv[3] = ./expectscript
set argc 0
set argv0 "./expectscript"
set argv ""
executing commands from command file ./expectscript
spawn jshell
parent: waiting for sync byte
parent: telling child to go ahead
parent: now unsynchronized from child
spawn: returns {19712}
expect: does "" (spawn_id exp8) match glob pattern "jshell>"? no
| Welcome to JShell -- Version 9.0.1
| For an introduction type: /help intro
expect: does "| Welcome to JShell -- Version 9.0.1\r\n| For an introduction type: /help intro\r\n" (spawn_id exp8) match glob pattern "jshell>"? no
jshell>
expect: does "| Welcome to JShell -- Version 9.0.1\r\n| For an introduction type: /help intro\r\n\r\njshell> " (spawn_id exp8) match glob pattern "jshell>"? yes
expect: set expect_out(0,string) "| Welcome to JShell -- Version 9.0.1\r\n| For an introduction type: /help intro\r\n\r\njshell> "
expect: set expect_out(spawn_id) "exp8"
expect: set expect_out(buffer) "| Welcome to JShell -- Version 9.0.1\r\n| For an introduction type: /help intro\r\n\r\njshell> "
send: sending "3\r" to { exp8 }
expect: does "" (spawn_id exp8) match glob pattern "jshell>"? no
expect: does "\u001b[6n" (spawn_id exp8) match glob pattern "jshell>"? no
^[[32;1Rexpect: timed out