Regex 使用Powershell打印与正则表达式匹配的代码行号

我认为我们的源代码中有一堆注释掉的代码，我们没有立即删除它，而是把它留下了。现在我想做一些清理工作

因此，假设我有一个足够好的正则表达式来查找注释（下面的正则表达式很简单，我可以根据我们的编码标准对其进行扩展），我如何获取我读取的文件的结果并输出以下内容：

• 文件名
• 行号
• 实际的代码行

我想我已经有了答案的基础，但我不知道如何把我读过的文件用正则表达式解析出来，然后以这种格式输出

我不是在寻找完美的解决方案——我只是想找到大块注释掉的代码。通过查看结果并看到一堆具有相同名称和顺序行号的文件，我应该能够做到这一点

$Location = "c:\codeishere"

[regex]$Regex = "//.*;" #simple example - Will expand on this...

$Files = get-ChildItem $Location -include *cs -recurse
foreach ($File in $Files) {
    $contents = get-Content $File
    $Regex.Matches($contents) | WHAT GOES HERE?
}

---

我会考虑这样做：

dir $location -inc *.cs -rec | `
  %{ $file = $_; $n = 0; get-content $_ } | `
  %{ $_.FileName = $file; $_.Line = ++$n; $_ } | `
  ?{ $_ -match $regex } | `
  %{ "{0}:{1}: {2}" -f ($_.FileName, $_.Line, $_)}

也就是说，在字符串中添加额外的属性，以指定文件名和行号，在正则表达式匹配后可以通过管道进行传输

（使用每个对象的-begin/-end脚本块应该可以简化此过程。）

您可以执行以下操作：

dir c:\codeishere -filter *.cs -recurse | select-string -Pattern '//.*;' | select Line,LineNumber,Filename

---

select-string

cmdlet已经完全满足了您的要求，尽管显示的文件名是一个相对路径。

我个人会更进一步。我想计算以下连续行的数量。然后打印文件名、行数和行本身。您可以按行数对结果进行排序（是否删除候选行？）。 请注意，我的代码不计算注释行之间的空行数，因此此部分被视为两个注释代码块：

// int a = 10;
// int b = 20;

// DoSomething()
// SomethingAgain()

这是我的密码

$Location = "c:\codeishere"

$occurences = get-ChildItem $Location *cs -recurse | select-string '//.*;'
$grouped = $occurences | group FileName

function Compute([Microsoft.PowerShell.Commands.MatchInfo[]]$lines) {
  $local:lastLineNum = $null
  $local:lastLine = $null
  $local:blocks = @()
  $local:newBlock = $null
  $lines | 
    % { 
      if (!$lastLineNum) {                             # first line
        $lastLineNum = -2                              # some number so that the following if is $true (-2 and lower)
      }

      if ($_.LineNumber - $lastLineNum -gt 1) {        #new block of commented code
        if ($newBlock) { $blocks += $newBlock }
        $newBlock = $null
      }
      else {                                           # two consecutive lines of commented code
        if (!$newBlock) { 
          $newBlock = '' | select File,StartLine,CountOfLines,Lines
          $newBlock.File, $newBlock.StartLine, $newBlock.CountOfLines, $newBlock.Lines = $_.Filename,($_.LineNumber-1),2, @($lastLine,$_.Line)
        }
        else {
          $newBlock.CountOfLines += 1
          $newBlock.Lines += $_.Line
        }
      }
      $lastLineNum=$_.LineNumber
      $lastLine = $_.Line
    }

  if ($newBlock) { $blocks += $newBlock }
  $blocks
}

# foreach GroupInfo objects from group cmdlet
# get Group collection and compute 
$result = $grouped | % { Compute $_.Group }

#how to print
$result | % {
  write-host "`nFile $($_.File), line $($_.StartLine), count of lines: $($_.CountOfLines)" -foreground Green
  $_.Lines | % { write-host $_ }
}

# you may sort it by count of lines:
$result2 = $result | sort CountOfLines -desc
$result2 | % {
  write-host "`nFile $($_.File), line $($_.StartLine), count of lines: $($_.CountOfLines)" -foreground Green
  $_.Lines | % { write-host $_ }
}

---

如果你有任何想法如何改善代码，张贴它！我有一种感觉，我可以使用一些标准cmdlet来完成，代码可以更短。

我不确定{$\u.\u-match$regex}| `在做什么，但这一行似乎阻止了我获得结果。那有什么用？此外，我还必须将$FileName和$Line更改为$FileName和$Line，才能将其保存到run@Macho字体输入。。。will ix，应该是$\注意其他答案：select string已经捕获了文件名和行号。这超出了问题的范围，但是哇。。。这太棒了。谢谢我将使用这个。是的，超出范围，但我认为它可能有用。除此之外，这很有趣：）如果您对匹配块之间的空行也感兴趣，请告诉我。我会尝试调整脚本。有没有办法将

LineNumber

的实际整数存储到变量中，而不使用文本

LineNumber\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu
$Location = "c:\codeishere"

$occurences = get-ChildItem $Location *cs -recurse | select-string '//.*;'
$grouped = $occurences | group FileName

function Compute([Microsoft.PowerShell.Commands.MatchInfo[]]$lines) {
  $local:lastLineNum = $null
  $local:lastLine = $null
  $local:blocks = @()
  $local:newBlock = $null
  $lines | 
    % { 
      if (!$lastLineNum) {                             # first line
        $lastLineNum = -2                              # some number so that the following if is $true (-2 and lower)
      }

      if ($_.LineNumber - $lastLineNum -gt 1) {        #new block of commented code
        if ($newBlock) { $blocks += $newBlock }
        $newBlock = $null
      }
      else {                                           # two consecutive lines of commented code
        if (!$newBlock) { 
          $newBlock = '' | select File,StartLine,CountOfLines,Lines
          $newBlock.File, $newBlock.StartLine, $newBlock.CountOfLines, $newBlock.Lines = $_.Filename,($_.LineNumber-1),2, @($lastLine,$_.Line)
        }
        else {
          $newBlock.CountOfLines += 1
          $newBlock.Lines += $_.Line
        }
      }
      $lastLineNum=$_.LineNumber
      $lastLine = $_.Line
    }

  if ($newBlock) { $blocks += $newBlock }
  $blocks
}

# foreach GroupInfo objects from group cmdlet
# get Group collection and compute 
$result = $grouped | % { Compute $_.Group }

#how to print
$result | % {
  write-host "`nFile $($_.File), line $($_.StartLine), count of lines: $($_.CountOfLines)" -foreground Green
  $_.Lines | % { write-host $_ }
}

# you may sort it by count of lines:
$result2 = $result | sort CountOfLines -desc
$result2 | % {
  write-host "`nFile $($_.File), line $($_.StartLine), count of lines: $($_.CountOfLines)" -foreground Green
  $_.Lines | % { write-host $_ }
}