Git grep all repositories in current directory

GrepRepositories.ps1

[CmdletBinding()]

Param(
    [Parameter(Mandatory=$True,Position=1)]
    [string]$expression
)

$originalPath = $pwd.Path
$repositories = gci | ?{ $_.PSIsContainer } |  foreach { $_.Name }

# $cmd = "cd .\{0}\; git --no-pager grep -n ""{1}""; cd {2}"
# foreach ($r in $repositories) { Invoke-Expression $($cmd -f $r, $expression, $originalPath)}  

$command = "cd .\{{0}}\; git --no-pager grep -n ""{0}""; cd {1}" -f $expression, $originalPath 
foreach ($repository in $repositories) { Invoke-Expression $($command -f $repository)}  

GrepRepositories2.ps1

[CmdletBinding()]

Param(
    [Parameter(Mandatory=$True,Position=1)]
    [string]$expression
)

$quotes = [regex]::matches($expression, '"');
$singleQuotes = [regex]::matches($expression, "'");

If ($quotes.Count % 2 -ne 0 -or $singleQuotes.Count % 2 -ne 0) { 
    Write-Error "Avoid using quotes if possible" 
    exit 1
}

$originalPath = $pwd.Path
$repositories = gci | ?{ $_.PSIsContainer } |  foreach { $_.Name }

$command = "cd .\""{{0}}""\; git --no-pager grep -n ""{0}""; cd ""{1}""" -f $expression, $originalPath 
foreach ($repository in $repositories) { Invoke-Expression $($command -f $repository)}  

GrepRepositories3.ps1

# ps> GrepRepositories.ps1 "venv"
# $ powershell ./GrepRepositories.ps1 "var"
# $ powershell ./GrepRepositories.ps1 "var" | grep iter

[CmdletBinding()]

Param(
    [Parameter(Mandatory=$True,Position=1)]
    [string]$expression,

    [Parameter(Position=2)]
    [string]$wildcard
)

$safe = [regex]::matches($expression, '"'),
        [regex]::matches($expression, "'"),
        [regex]::matches($wildcard, '"'), 
        [regex]::matches($wildcard, "'")

foreach ($quoted in $safe) { If ($quoted.Count % 2 -ne 0) {
    Write-Error "Avoid using quotes if possible" 
    exit 1
}}

$originalPath = $($pwd.Path)
$repositories = gci | ?{ $_.PSIsContainer } | foreach { $_.Name }

$formattedExpr = If ($wildcard -eq $null) {'"{0}"' -f $expression} Else {'"{0}" -- "{1}"' -f $expression, $wildcard}
$command = 'cd .\"{{0}}"\; git --no-pager grep -n {0}; cd "{1}"' -f $formattedExpr, $originalPath 
foreach ($repository in $repositories) { Invoke-Expression $($command -f $repository)}  
Write-Output $("`r`nExpression: '{0}'`r`nWildCard: '{1}'" -f $expression, $wildcard)

GrepRepositories4.ps1

[CmdletBinding()]

Param(
    [Parameter(Mandatory=$True,Position=1)]
    [string]$expression,

    [Parameter(Position=2)]
    [string]$wildcard
)

$safe = [regex]::matches($expression, '"'),
        [regex]::matches($expression, "'"),
        [regex]::matches($wildcard, '"'), 
        [regex]::matches($wildcard, "'")

foreach ($quoted in $safe) { If ($quoted.Count % 2 -ne 0) {
    Write-Error "Avoid using quotes if possible" 
    exit 1
}}

$restorePath = "cd {0}" -f $($pwd.Path)
$repos = gci | ?{ $_.PSIsContainer } | foreach { $_.FullName }
$formattedExpression = '"{0}"' -f $expression
If ($wildcard -ne $null) { $formattedExpression += ' -- "{0}"' -f $wildcard }
$command = 'cd "{{0}}"; git --no-pager grep -n {0}' -f $formattedExpression
foreach ($repo in $repos) { Invoke-Expression $($command -f $repo)}
Invoke-Expression $restorePath
Write-Output $("`r`nExpression: '{0}'`r`nWildCard: '{1}'" -f $expression, $wildcard)