NullsoftDecompiler

From NSIS Wiki

About

The NullsoftDecompiler or NSIDis

is a open source Python script that'll help you to nearly fully recover your NSIS-installation scripts.

It's currently in the 'alpha-state' however it's not far from being worth to title as beta or release.

Sample Output

...
   ;/ #000D 06_   EW_UPDATETEXT: p0: 00EB 0000 0000  p3: 0000 0000 0000
       DetailPrint "section end" 
 
Section End
 
FunctionEnd
   ;/ #000E 01_          EW_RET: p0: 0000 0000 0000  p3: 0000 0000 0000
       Return
 
Section  
 
   ;/ #000F 19_    EW_ASSIGNVAR: p0: 0001 00F7 0000  p3: 0000 0000 0000
       StrCpy $1 POOOOOOOOOOOP  
 
   ;/ #0010 06_   EW_UPDATETEXT: p0: 0105 0000 0000  p3: 0000 0000 0000
       DetailPrint "I like to be able to see what is going on (debug) $1" 
 
   ;/ #0011 33_     EW_WRITEREG: p0: -7FFFFFFE 013B 0159  p3: 0165 0001 0001
       WriteRegStr HKLM SOFTWARE\NSISTest\BigNSISTest Install_Dir $INSTDIR
...

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