ifFileExists - compile time

Here's what I'm trying to do and am not sure if it's actually possible:

;compileTime
IfFileExists onLocalMachine
Do
;Runtime
Unregister dll
Copy dll from local to dest
Register dll
Done
Endif

In other words, I want to ignore a section of code if a certain file doesn't exist at compile time.

Thanks,
Eric

I think I know the answer to this. Tell me if I'm wrong:

IfFileExists is compile time
FindFirst is run time

If that's the case, I'm square. I'm going to code based on this assumption.

Thanks,
Eric

Looks to me like I'm wrong based on the documentation for DLL/TLB Library Setup. IfFileExists is looking on the destination machine.

Doing a forum search usually helps.



-Stu

I tried, but I guess you are better at searching this forum. So, I tried to do basically what they're doing and failed. Any help on what I'm doing wrong?

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;Backgound Colors
BGGradient 800080 000000 FFFFFF
BrandingText " "

Name "Test"

;Output File Name
OutFile "test.exe"

;The Default Installation Directory
InstallDir "D:\NoWhereLand"

Section "Install"

!system 'IF EXIST "D:\myFile.txt" ECHO !define MyVar'

!ifdef MyVar
MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION \
"file exists $\n$\nClick `OK` to continue \
or `Cancel` to abort." \
IDOK +1

!endif

MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION \
"finished $\n$\nClick `OK` to continue \
or `Cancel` to abort." \
IDOK +1

SectionEnd

Section "Shortcuts"
;Add Shortcuts
SectionEnd
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

Thanks,
Eric

Nevermind, I see what I missed:

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;Backgound Colors
BGGradient 800080 000000 FFFFFF
BrandingText " "

Name "Test"

;Output File Name
OutFile "test.exe"

;The Default Installation Directory
InstallDir "D:\NoWhereLand"

Section "Install"

!system 'IF EXIST "D:\myFile.txt" ECHO !define MyVar>"%TEMP%\Temp$$$.nsh"'
!include "$%TEMP%\Temp$$$.nsh"
!system 'DEL "%TEMP%\Temp$$$.nsh"'


!ifdef MyVar
MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION \
"file exists $\n$\nClick `OK` to continue \
or `Cancel` to abort." \
IDOK +1

!endif

MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION \
"finished $\n$\nClick `OK` to continue \
or `Cancel` to abort." \
IDOK +1

SectionEnd

Section "Shortcuts"
;Add Shortcuts
SectionEnd

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

You're missing about 80% of the code.

!system 'IF EXIST "C:\NsisBuilds\MaybeFileMaybeNot\file.txt" ECHO !insertmacro MUI_INSTALLOPTIONS_WRITE "Menu.ini" "Field 3" "Flags" "DISABLED">"%TEMP%\Temp$$$.nsh"'

!include "$%TEMP%\Temp$$$.nsh"

!system 'DEL "%TEMP%\Temp$$$.nsh"'

It's writing a define to a temp file and then !including that temp file (and then deleting it).
You're missing those 3 main parts.

Edit: You just updated your post when I posted 🙂

-Stu

Is there a way to modularize this? I tried, but it doesn't seem to work. Anyone see what I'm doing wrong?

;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;Backgound Colors
BGGradient 800080 000000 FFFFFF
BrandingText " "

Name "Test"

;Output File Name
OutFile "test2.exe"

;The Default Installation Directory
InstallDir "D:\NoWhereLand"

Section "Install"

StrCpy $8 'D:\myFile.txt'
call checkFileExists

!ifdef MyVar
MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION \
"D:\myFile.txt file exists $\n$\nClick `OK` to continue \
or `Cancel` to abort." \
IDOK +1
!endif
!ifndef MyVar
MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION \
"myFile.txt file doesn't exist $\n$\nClick `OK` to continue \
or `Cancel` to abort." \
IDOK +1
!endif

StrCpy $8 'D:\noFile.txt'
call checkFileExists

!ifdef MyVar
MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION \
"D:\noFile.txt file exists $\n$\nClick `OK` to continue \
or `Cancel` to abort." \
IDOK +1
!endif
!ifndef MyVar
MessageBox MB_OKCANCEL|MB_ICONEXCLAMATION \
"noFile.txt file doesn't exist $\n$\nClick `OK` to continue \
or `Cancel` to abort." \
IDOK +1
!endif


SectionEnd

Section "Shortcuts"
;Add Shortcuts
SectionEnd

Function checkFileExists

!ifdef MyVar
!undef MyVar
!endif

!system 'ECHO ;$8 FileCheck>"%TEMP%\Temp$$$.nsh"'
!system 'IF EXIST "$8" ECHO !define MyVar>"%TEMP%\Temp$$$.nsh"'
!include "$%TEMP%\Temp$$$.nsh"
!system 'DEL "%TEMP%\Temp$$$.nsh"'


FunctionEnd
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

All NSIS variables $0-$9 ... are run-time.

Name "Test"

OutFile "Test.exe"



Section "Install"

	!ifdef MyVar

	!undef MyVar

	!endif



	!system 'IF EXIST "D:\myFile.txt" IF EXIST "D:\noFile.txt" ECHO !define MyVar>>"%TEMP%\Temp$$$.nsh"'

	!include "$%TEMP%\Temp$$$.nsh"

	!system 'DEL "%TEMP%\Temp$$$.nsh"'



	!ifdef MyVar

	MessageBox MB_OK '"D:\myFile.txt" and "D:\noFile.txt" were exist at compile-time'

	!endif



	!ifndef MyVar

	MessageBox MB_OK '"D:\myFile.txt" and "D:\noFile.txt" were not exist at compile-time'

	!endif

SectionEnd