IfFileExists Changes Section Flags

Description

IfFileExists determines whether certain component sections are checked or unchecked.

The Script

!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