Replacing Lines in a Text File

Author: KiCHiK (talk, contrib)

Description

This script will replace every occurrence of the line "line to replace" with the line "replacement of line" in the file called "file.txt".

The Script

ClearErrors
FileOpen $0 "file.txt" "r"
GetTempFileName $R0
FileOpen $1 $R0 "w"
loop:
   FileRead $0 $2
   IfErrors done
   StrCmp $2 "line to replace$\r$\n" 0 +3
      FileWrite $1 "replacement of line$\r$\n"
      Goto loop
   StrCmp $2 "line to replace" 0 +3
      FileWrite $1 "replacement of line"
      Goto loop
   FileWrite $1 $2
   Goto loop
 
done:
   FileClose $0
   FileClose $1
   Delete "file.txt"
   CopyFiles /SILENT $R0 "file.txt"
   Delete $R0