Overwrite protection - Making sure install doesn't accidently erase anything

I'm trying to include a safeguard in the installer that will prevent a user from accidentally erasing something. Is there any way to provide a pop up window that says:

"File XXXXX already exists, would you like to overwite?

[Yes] [Yes to All] [No]"

Check for the existence of the file with "IfFileExists" and display a warning if it's already there. Depending on the user's decision you can either skip or overwrite...

Here is a macro:

!define FileOverwriteCheck "!insertmacro _FileOverwriteCheck"



!macro _FileOverwriteCheck target source

  IfFileExists "$OUTDIR\${target}" 0 +3

  MessageBox MB_YESNO 'Overwrite file: "$OUTDIR\${target}" ???' IDYES +2

  Goto +2

  File "/oname=${target}" "${source}"

!macroend



Section

  SetOuPath $INSTDIR

  ${FileOverwriteCheck} "File.foo" "C:\Data\File.foo"

  ...

SectionEnd

LoRd_MuldeR,


Thanks for the help. The macro works fine. Is there a [B}file /r[/B] version of it? Something that will allow me to copy over an entire directory and warn me of popups?

The /r switch will include all files from all subdirectories. Since you don't know which files will be extracted in advance, that won't work with the proposed macro...

Does anyone here have a macro that can employ the "Yes to all" feature when copying/overwriting files? I would have to force someone to click "yes" a 100 times when doing a re-install.

messageboxes have, at most "yes, no, cancel" and "abort, retry, ignore" as advanced options.. so a 'yes to all' or 'no to all' wouldn't be possible with a messagebox.

You could pop up two messageboxes.. one after the first that asks if the user wants the just-chosen action to be applied to any further such warnings.

Or you can try working with the MessageBox plugin:


It allows you to use 4 buttons, customize the text on them, and get the results. That way you can can certainly have [Yes] [No] [Yes to all] [No to all], or whatever tickles your fancy.