PowerShell5 索引 [0] 到字符串的第一个实例，索引 [1] 到第二个实例，依此类推直到完成 6800 行 windows10 批处理文件

Question

Powershell5 脚本因 Windows 10 批处理文件中的特殊字符而窒息，或者我的代码从根本上是错误的？

解析6800行Windows10个批处理文件，找到字符串{LINE2 1-9999}并将{1-9999}替换为代码所在的行号，重新编写批处理文件。 {LINE2 1-9999} 有 54 个实例。如果我解析整个批次，则会输出前 54 行，其中 none 包含字符串。

$lines = sls "LINE2" $env:windir\_61.bat | Select-Object -ExpandProperty LineNumber
gc $env:windir\_61.bat -OutVariable Content
$output = for ($index = 0; $index -lt $lines.count; $index++) {
$Content[$index] -replace "LINE2.*", "LINE2 $($lines[$index])"
} 
$output | sc "$env:TEMP\somebadhat.bat"

如果_61.bat是：

TITLE %TIME%   NO "%zmyapps1%\*.*" ARCHIVE ATTRIBUTE   LINE2 1243 
TITLE %TIME%   DOC/SET YQJ8   LINE2 1887 
SET ztitle=%TIME%: WINFOLD   LINE2 2557 
TITLE %TIME%   _*.* IN WINFOLD   LINE2 2597 
TITLE %TIME%   %%ZDATE1%% YQJ25   LINE2 3672 
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 4922

结果：

TITLE %TIME%   NO "%zmyapps1%\*.*" ARCHIVE ATTRIBUTE   LINE2 1
TITLE %TIME%   DOC/SET YQJ8   LINE2 2
SET ztitle=%TIME%: WINFOLD   LINE2 3
TITLE %TIME%   _*.* IN WINFOLD   LINE2 4
TITLE %TIME%   %%ZDATE1%% YQJ25   LINE2 5
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 6

如果_61.bat是：

TITLE %TIME%   NO "%zmyapps1%\*.*" ARCHIVE ATTRIBUTE   LINE2 1243
TITLE %TIME%   DOC/SET YQJ8   LINE2 1887
SET ztitle=%TIME%: WINFOLD   LINE2 2557
TITLE %TIME%   _*.* IN WINFOLD   LINE2 2597
TITLE %TIME%   %%ZDATE1%% YQJ25   LINE2 3672
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 4922
:: Microsoft Windows [Version 10.0.17134.345] 64-BIT
@ECHO OFF 
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 4923

结果：

TITLE %TIME%   NO "%zmyapps1%\*.*" ARCHIVE ATTRIBUTE   LINE2 1
TITLE %TIME%   DOC/SET YQJ8   LINE2 2
SET ztitle=%TIME%: WINFOLD   LINE2 3
TITLE %TIME%   _*.* IN WINFOLD   LINE2 4
TITLE %TIME%   %%ZDATE1%% YQJ25   LINE2 5
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 6
:: Microsoft Windows [Version 10.0.17134.345] 64-BIT
@ECHO OFF

TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 4923

丢失。

@有 30 个实例。例如：

SET p= & title NetFix v1.0a by Giovanni Heward (g@utahjrs.com) complete!
%PROGRAMFILES%-Zipz.exe" u -t7z -x@"%WINDIR%\_exclude7z.txt"

这是导致问题的原因吗？我会用什么代替它？为什么，如果我解析具有 54 个字符串实例的整个文件，它会输出 54 行，其中 none 包含字符串？我的代码有什么根本性的错误吗？

Answer 1

您的脚本将仅解析包含 "LINE2 nnnn" 标记的输入脚本的行数。因此，在上面的第二个输入示例中，在 9 行输入中，只有 7 行包含 "LINE2 nnnn"，因此您只处理了前 7 行。原因是这样的：

$lines = sls "LINE2" c:\temp\_61.bat | Select-Object -ExpandProperty LineNumber

此行包含包含匹配文本的所有行的数组，因此 $lines 是一个包含 7 个整数的数组。稍后在您的 for 循环中，您只迭代那么多项目：

$output = for ($index = 0; $index -lt $lines.count; $index++) {

你并不真的需要 $lines 数组，只需在内容上使用循环索引来确定行号：

gc $env:windir\_61.bat -OutVariable Content 
$output = for ($index = 0; $index -lt $Content.count; $index++) {
$Content[$index] -replace "LINE2.*", "LINE2 $($index)"
} 
$output | sc "$env:TEMP\somebadhat.bat"

请注意，您可以通过管道推送所有数据，删除临时变量来稍微清理一下脚本：

gc $env:windir\_61.bat | foreach -begin {$lc = 1} -process {
    $_ -replace "LINE2 \d*", "LINE2 $lc";
    $lc += 1
} | out-file "$env:TEMP\somebadhat.bat"

Answer 2

只是为了可视化什么是Select-String returns以及如何替换基于索引的文件内容中的行号（zdan的方法效率更高）

## Q:\Test19\SO_54712715.ps1
$FilePath = '.\_61v2.bat'
$FileContent = Get-Content $FilePath
$FileMatches = Select-String -Path $FilePath -Pattern '(?<=LINE2 )\d+\s?$'

ForEach ($FM in $FileMatches){
   "{0}:{1} [{2}=>{0}]" -f $FM.LineNumber,$FM.Line,$FM.Matches.Value
   $FileContent[$FM.LineNumber-1] = $FM.Line.Replace($FM.Matches.Value,$FM.LineNumber)
}
$FileContent | Set-Content $FilePath

示例输出：

> Q:\Test19\SO_54712715.ps1
1:TITLE %TIME%   NO "%zmyapps1%\*.*" ARCHIVE ATTRIBUTE   LINE2 1243 [1243=>1]
2:TITLE %TIME%   DOC/SET YQJ8   LINE2 1887 [1887=>2]
3:SET ztitle=%TIME%: WINFOLD   LINE2 2557 [2557=>3]
4:TITLE %TIME%   _*.* IN WINFOLD   LINE2 2597 [2597=>4]
5:TITLE %TIME%   %%ZDATE1%% YQJ25   LINE2 3672 [3672=>5]
6:TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 4922 [4922=>6]
9:TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 4923 [4923=>9]

和生成的文件内容（上述 bat 的版本 2）

> gc .\_61v2.bat
TITLE %TIME%   NO "%zmyapps1%\*.*" ARCHIVE ATTRIBUTE   LINE2 1
TITLE %TIME%   DOC/SET YQJ8   LINE2 2
SET ztitle=%TIME%: WINFOLD   LINE2 3
TITLE %TIME%   _*.* IN WINFOLD   LINE2 4
TITLE %TIME%   %%ZDATE1%% YQJ25   LINE2 5
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 6
:: Microsoft Windows [Version 10.0.17134.345] 64-BIT
@ECHO OFF
TITLE %TIME%   FINISHED. PRESS ANY KEY TO SHUTDOWN ... LINE2 9

PowerShell5 索引 [0] 到字符串的第一个实例，索引 [1] 到第二个实例，依此类推直到完成 6800 行 windows10 批处理文件

PowerShell5 index[0] to the first instance of the string, index[1] to the second instance and so on till finished on a 6800 line windows10 batch file

powershell

powershell-5.0