Uncheck Section IfFileExists

How do I unckeck a Section with IfFileExists?

Look at macros in Section.nsh file, probably you should use UnSelectSection macro.

Shouldn't this work?

Function CheckInstall

  IfFileExists $WINDIR\notepad.exe Skip

  !insertmacro ReverseSection SecTest

  Skip:

FunctionEnd

 



Section "Test" SecTest

  Call CheckInstall

SectionEnd

anyone?

Not quite.
The Section needs to be above the Function and the ReverseSection line needs to look like this:

!insertmacro ReverseSection ${SecTest}

-Stu

Actually, you should use the UnselectSection macro.

-Stu

I did as you said, but it doesn't work. 🙁

Your code is logically faulty. You can't unselect a section while it running!
You should call your CheckInstall in the Components page leave function.

-Stu

leave function? I need to run it before the component page load otherwise... it makes no sense. Call function needs to be in a Selection to function I read.

Sorry, I meant Pre function.

!define MUI_PAGE_CUSTOMFUNCTION_PRE ComponentsPagePre
!insertmacro MUI_PAGE_COMPONENTS

Function ComponentsPagePre
...

-Stu

Still no luck. Now it looks like this...

!define MUI_PAGE_CUSTOMFUNCTION_PRE ComponentsPagePre

!insertmacro MUI_PAGE_COMPONENTS



Function ComponentsPagePre

 Call CheckInstall

FunctionEnd



Section "Test" SecTest

  SetOutPath "$INSTDIR"

  SetOverwrite ifnewer

  ;Files Here

SectionEnd



Function CheckInstall

  IfFileExists $WINDIR\NOTEPAD.EXE Skip

   !insertmacro UnselectSection ${SecTest}

  Skip:

FunctionEnd

IfFileExists "$WINDIR\NOTEPAD.EXE" Skip

use quotes 🙂 its safer.

Scripting an installer is hopeless, and looking at the number of threads in this forum I can see I'm not the only one haveing a hard time. I'll just have to use the zip2exe wizard.

You just have to have a little patience, really... if all you need to have is an auto-extracting .zip file.. sure, zip2exe or Winzip's functionalities are just dandy if not preferable.

If you want a more complex system, NSIS is the way to go.

If you could indicate whether Comm@nder21's last comment helped at all or not, we could have a closer look - as far as I can see things should work fine though.

Just to confirm, I'm assuming that you want to uncheck the Section if Notepad doesn't exist?

-Stu

If the file already exists, then uncheck.

You should read the docs again on IfFileExists. You're skipping your code if the file exists.

-Stu

Documentation.

4.9.4.10 IfFileExists
file_to_check_for jump_if_present [jump_otherwise]
Checks for existence of file(s) file_to_check_for (which can be a wildcard, or a directory), and Gotos jump_if_present if the file exists, otherwise Gotos jump_otherwise. If you want to check to see if a file is a directory, use IfFileExists DIRECTORY\*.*

IfFileExists $WINDIR\notepad.exe 0 +2
MessageBox MB_OK "notepad is installed"

You shouldn't assume a normal person understand what is written in the manual. I don't understand it. It doesn't say how to do something if a file exist. Only option is jump.

WTF is 0 +2? 😕

The jumps are explained earlier in the manual. But a better method is explained even earlier, in the tutorial.

${If} ${FileExists} $WINDIR\notepad.exe

  DetailPrint "notepad found"

${Else}

  DetailPrint "notepad not found"

${EndIf}

Thanks. I managed to figure it out though. 🙂

  IfFileExists "file" uncheck leave

   uncheck:

   !insertmacro UnselectSection ${SecTest}

   leave:

Though I still don't know what 0 +2 is. And I don't care. The ^tutorial only said yadi yadi yada to me. 😕

0 means don't jump anywhere, i.e. carry on onto the next instruction. +2 would mean jump over the proceding instruction onto the one after (i.e. 2 instructions from the current statement).
+1 would be the same as 0.

-Stu

Ok so if I understand you correct, this code would do the same thing as the code above?

IfFileExists "file" 0 +2

   !insertmacro UnselectSection ${SecTest}

EDIT: Tried but it didn't work. Unselect was always run.

No, because macros are not one instruction. Macros often contain more than one instruction.

Ok. Thank you.

!include "MUI.nsh"

OutFile "S32.exe"



!define MUI_PAGE_CUSTOMFUNCTION_PRE ComponentsPage1Pre

!insertmacro MUI_PAGE_COMPONENTS



Function ComponentsPage1Pre

  Call Check1

  Call Check2

  Call Check3

  Call Check4

  Call Check5

FunctionEnd



Function Check1

IfFileExists $PROGRAMFILES\NSIS\NSIS.exe skip

   !insertmacro UnselectSection ${Sec60}

  skip:

FunctionEnd



Function Check2

IfFileExists $PROGRAMFILESA\A.exe skip

   !insertmacro UnselectSection ${Sec20}

  skip:

FunctionEnd



Function Check3

IfFileExists $PROGRAMFILES\DAEMON Tools\DAEMON.exe skip

   !insertmacro UnselectSection ${Sec30}

  skip:

FunctionEnd



Function Check4

IfFileExists $PROGRAMFILES\QQGAME\Game.exe skip

   !insertmacro UnselectSection ${Sec40}

  skip:

FunctionEnd



Function Check5

IfFileExists $windir\notepad skip

   !insertmacro UnselectSection ${Sec50}

  skip:

FunctionEnd 

It had another methods?

Look at IfFileExists again.

Stu

oh.yes!!!thanks

i know how to do it.

!include Sections.nsh

 

Name TestSelectSection

OutFile "TestSelectSection.exe"

 

Page components

Page instfiles

ShowInstDetails show

 

; This file will exist on most computers

Section /o "autoexec.bat detected" autoexec_detected

MessageBox MB_OK autoexec

SectionEnd

 

Section /o "Boot.ini detected" boot_detected

MessageBox MB_OK boot

SectionEnd

 

Section /o "non-existing file detected" missing_detected

MessageBox MB_OK missing

SectionEnd

 

Function .onInit

IfFileExists C:\autoexec.bat AutoexecExists PastAutoexecCheck

AutoexecExists:

  ; This is what is done by sections.nsh SelectSection macro

  SectionGetFlags "${autoexec_detected}" $0

  IntOp $0 $0 | ${SF_SELECTED}

  SectionSetFlags "${autoexec_detected}" $0

 

PastAutoexecCheck:

IfFileExists C:\boot.ini BootExists PastBootCheck

BootExists:

  ; Use the macro from sections.nsh

  !insertmacro SelectSection ${boot_detected}

 

PastBootCheck:

IfFileExists C:\xyz_missing.xyz MissingExists PastMissingCheck

MissingExists:

  !insertmacro SelectSection ${missing_detected}

 

PastMissingCheck:

FunctionEnd