Working Notes-My Work Diary

param(
    [Parameter(Mandatory=$true, HelpMessage="The name of the input file.")]
    [string]$FILENAME,

    [Parameter(Mandatory=$true, HelpMessage="The string to match at the beginning of lines.")]
    [string]$STRING
)

# 檢查參數是否為有效值
if (-not (Test-Path $FILENAME)) {
    Write-Host "ERROR: The specified file '$FILENAME' does not exist."
    exit
}

try {
    $lines = Get-Content -Path $FILENAME -Encoding UTF8 | Where-Object {
        # 排除空白行、以 '#' 開頭、以指定字串開頭的行
        ($_ -notmatch '^\s*$') -and ($_ -notmatch '^#') -and ($_ -like "$STRING*")
    }

    if ($lines.Count -eq 0) {
        Write-Host "No lines matching the specified criteria were found in '$FILENAME'."
    } else {
        $FILENAME2 = $FILENAME.Replace(".", "_2.")
        $lines | Out-File -FilePath $FILENAME2 -Encoding UTF8
        Write-Host "Matching lines have been saved to '$FILENAME2'."
    }
}
catch {
    Write-Host "An error occurred while processing the file: $_"
    exit
}