如何在powershell中缩进命令输出

Question

我正在尝试以漂亮的缩进形式显示 ping 命令输出...但是，似乎无法正确格式化它....

我想要这样的输出：

Result: 
        Pinging google.com [216.58.208.110] with 32 bytes of data:
        Reply from 216.58.208.110: bytes=32 time=223ms TTL=61
        Reply from 216.58.208.110: bytes=32 time=129ms TTL=61

        Ping statistics for 216.58.208.110:
            Packets: Sent = 2, Received = 2, Lost = 0 (0% loss),
        Approximate round trip times in milli-seconds:
            Minimum = 129ms, Maximum = 223ms, Average = 176ms

但是 Powershell 似乎不想让我在不弄乱输出的情况下这样做

这是我正在使用的代码块

$ping = & { Invoke-Expression "ping  -n 2 google.com" } 2>&1 | Out-String
Write-Host ""
Write-Host "$ping" -ForegroundColor Green
Write-Host ""

哪种有效，但没有缩进......

当我尝试不同的变体来获得缩进时，它们都失败了......

$ping = & { Invoke-Expression "ping  -n 2 google.com" } 2>&1 | Out-String
Write-Host ""
Write-Host "      $ping" -ForegroundColor Green
Write-Host ""

结果：这种工作，但只有第一行缩进...输出的其余部分没有...

$ping = & { Invoke-Expression "ping  -n 2 google.com" } 2>&1 | Format-Table 
Write-Host ""
Write-Host "    $ping" -ForegroundColor Green
Write-Host ""

结果：Powershell 吐出一个 windows 错误，并且表格从未出现过......

$ping = & { Invoke-Expression "ping  -n 2 google.com" } 2>&1
foreach ($line in $ping ) {
  Write-Host ""
  Write-Host "      $line" -ForegroundColor Green
  Write-Host ""
}

结果：输入的前 3 行左对齐，其余行按预期缩进...

$ping = & { Invoke-Expression "ping  -n 2 google.com" } 2>&1 
$indent = $ping.PadLeft(50)
Write-Host ""
Write-Host "    $indent" -ForegroundColor Green
Write-Host ""

结果：就像我在word中点击了右对齐按钮，输出却乱七八糟...

$ping = & { Invoke-Expression "ping  -n 2 google.com" } 2>&1
foreach ($line in $ping ) {
    Write-Host ""
    Write-Host "`t $line" -ForegroundColor Green
    Write-Host ""
}

结果：选项卡从未出现，输出左对齐，没有缩进...

有人可以指出我的方式的错误...过去几天一直让我发疯...

提前致谢！

x

Answer 1

大多数命令行工具一次输出一行，所以删除 Out-String 并在每行前面加上所需数量的空格：

$ping = & { ping -n 2 google.com } 2>&1
$ping |ForEach-Object {"    $_"}

如果工具输出多行字符串（或者如果您真的很喜欢 Out-String），您可以使用 -replace 正则表达式运算符在字符串开头和之后添加前导空格任何换行符 - 无论您有多个单行字符串还是一个（或多个）多行字符串，这都会起作用：

PS ~> $ping = & { ping -n 2 google.com } 2>&1 |Out-String
PS ~> $ping -replace '(?<=^|\n)',"`t"

        Pinging google.com [142.251.36.14] with 32 bytes of data:
        Reply from 142.251.36.14: bytes=32 time=12ms TTL=117
        Reply from 142.251.36.14: bytes=32 time=13ms TTL=117

        Ping statistics for 142.251.36.14:
            Packets: Sent = 2, Received = 2, Lost = 0 (0% loss),
        Approximate round trip times in milli-seconds:
            Minimum = 12ms, Maximum = 13ms, Average = 12ms

正则表达式模式(?<=^|\n) 匹配紧接在字符串开头 (^) 或文字换行符 (\n) 之后的任何位置。 "`t" 是文字 TAB 的转义序列，因此我们告诉 PowerShell 在输入字符串中的任何此类位置插入一个制表符。