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Append string to text file at end of line starting with "blah"

Traitée Append string to text file at end of line starting with "blah"

  • Tuesday, July 21, 2009 7:17 PM
     
     
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    Looking to use a batch file to search a specified txt file for the line starting with "whatever" and append a certain string "appendthis" to the end of the line. How can this be done? Many thanks.
     

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  • Tuesday, July 21, 2009 8:29 PM
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    Hi GrandPixel,

    When you say "batch file", will a WSH script be OK? (Trying to do this with a cmd script will be pretty painful)

    Bill
     
  • Tuesday, July 21, 2009 8:49 PM
     
     
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    I suppose. I just had to look up what WSH is. I am new to scripting (apparently) and have only done batch scripting. Is Windows PowerShell different from WSH? I would like to learn PowerShell as I understand it to be the latest greatest scripting platform.

    Anyway, not sure what it takes to implement WSH but I'm sure that would be fine. I need to learn something more flexible than batch scripting anyway. Seems like that's now the old way of doing things.
     
  • Wednesday, July 22, 2009 7:34 AM
     
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    @echo off
    Set src_file=c:\src.txt
    Set dst_file=c:\dst.txt
    Set tmp_file=c:\tmp.txt
    set s_find=blah
    set s_append="appendthis
    findstr %s_find% > %tmp_file%
    for /F %i in (%tmp_file%) do echo %i  %s_append% > %dst_file%
     
  • Wednesday, July 22, 2009 8:21 PM
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    With PowerShell, you can do something like this:

    $original = "whatever.txt"
$tempfile = [IO.Path]::GetTempFileName()

get-content $original | foreach-object {
  if ($_ -match "^whatever") {
    $_ + "appendthis" >> $tempfile
  }
  else {
    $_ >> $tempfile
  }
}

copy-item $tempfile $original
remove-item $tempfile

    Bill