#ahk #frontend to gnu #diff #tool

diff.ahk

#NoEnv
#SingleInstance, force
SetWorkingDir %A_ScriptDir%
FileEncoding UTF-8

 args = %0%
a_old = %1%
a_new = %2%

global timestamp, diffout
global log := SubStr(A_ScriptName, 1, -4) ".log"
SplitPath, a_new,, savedir,, basename
diffout := savedir "\" basename ".diff"
FormatTime, timestamp, , dd.MM. HH:mm:ss tt 
diffpath = "c:\Program Files (x86)\GnuWin32\bin\diff.exe"
diffargs = -U3 -Bib

if (args <> 2)                                                                  ; two arguments
  logMessage("wrong number of arguments: " . args . " found, 2 expected", "error")
else if (!FileExist(a_old))                                                                                   ; two files
  logMessage("file not found: " . a_old, "error")
else if (!FileExist(a_new))
  logMessage("file not found: " . a_new, "error")  
logMessage("--- "  . a_old . "`t`t+++ " . a_new, "comp")
RunWait, %comspec% /c %diffpath% %diffargs% %a_old% %a_new% > %diffout%, , Hide UseErrorLevel
if ErrorLevel = ERROR 
  logMessage("Diff could not be launched from " . diffpath, "error") 
else  
  logMessage(">>> " . diffout, "save")
exit

logMessage(text, mode = "info") {
  StringUpper, mode, mode
  FileAppend, [%timestamp%] [%mode%] %text%`n, %log% 
  if mode = ERROR
  {
    Msgbox,262208 , %mode%, %text%`n`n`nUsage:`n%A_ScriptName% <oldfile> <newfile>  
    Exit
  }
}