Simple installer with JRE check

Author: weebib (talk, contrib)

Description

This is a not very fancy install that has one interesting feature though. It can achieve a JRE version check. Depending on the outcome of the check procedure, it will display a Window warning the user that a newer version will be installed (or the user should install it manually).

As it has been pointed out in the forum, there ought to be another solution to perform a much more thorough search for the JRE than the one achieved by the present installer.

The big effort of this install was to use an (optional) InstFile window while installing the jre.

The Script

; Credit given to so many people of the NSIS forum.
 
!define JRE_VERSION "1.4.1"
 
!include "MUI.nsh"
!include "Sections.nsh"
 
!define TEMP $R0
!define TEMP2 $R1
!define VAL1 $R2
!define VAL2 $R3
 
!define DOWNLOAD_JRE_FLAG $8
 
; define your own download path
!define JRE_URL "<path to a jre install>/jre.exe"
 
;--------------------------------
;Configuration
 
  ;General
  Name "JRE Test"
  OutFile "jretest.exe"
 
  ;Folder selection page
  InstallDir "$PROGRAMFILES\JRE Test"
 
  ;Get install folder from registry if available
  InstallDirRegKey HKLM "SOFTWARE\JRE Test" ""
 
;--------------------------------
;Pages
 
  Page custom CheckInstalledJRE
  !insertmacro MUI_PAGE_INSTFILES
  !define MUI_PAGE_CUSTOMFUNCTION_PRE myPreInstfiles
  !define MUI_PAGE_CUSTOMFUNCTION_LEAVE RestoreSections
  !insertmacro MUI_PAGE_DIRECTORY
  !insertmacro MUI_PAGE_INSTFILES
 
  !insertmacro MUI_UNPAGE_CONFIRM
  !insertmacro MUI_UNPAGE_INSTFILES
 
;--------------------------------
;Modern UI Configuration
 
  !define MUI_ABORTWARNING
 
;--------------------------------
;Languages
 
  !insertmacro MUI_LANGUAGE "English"
 
;--------------------------------
;Language Strings
 
  ;Description
  LangString DESC_SecJRETest ${LANG_ENGLISH} "Application files copy"
 
  ;Header
  LangString TEXT_JRE_TITLE ${LANG_ENGLISH} "Java Runtime Environment"
  LangString TEXT_JRE_SUBTITLE ${LANG_ENGLISH} "Installation"
  LangString TEXT_PRODVER_TITLE ${LANG_ENGLISH} \
"Installed version of JRE Test"
  LangString TEXT_PRODVER_SUBTITLE ${LANG_ENGLISH} "Installation cancelled"
 
;--------------------------------
;Reserve Files
 
  ;Only useful for BZIP2 compression
 
  ReserveFile "jre.ini"
  !insertmacro MUI_RESERVEFILE_INSTALLOPTIONS
 
;--------------------------------
;Installer Sections
 
Section -installjre jre
  DetailPrint "Starting the JRE installation"
  !ifdef WEB_INSTALL
    DetailPrint "Downloading the JRE setup"
    NSISdl::download /TIMEOUT=30000 ${JRE_URL} "$TEMP\jre_setup.exe"
    Pop $0 ;Get the return value
    StrCmp $0 "success" InstallJRE 0
    StrCmp $0 "cancel" 0 +3
    Push "Download cancelled."
    Goto ExitInstallJRE
    Push "Unkown error during download."
    Goto ExitInstallJRE
  !else
    File /oname=$TEMP\jre_setup.exe j2re-setup.exe
  !endif
InstallJRE:
  DetailPrint "Launching JRE setup"
  ExecWait "$TEMP\jre_setup.exe" $0
  DetailPrint "Setup finished"
  Delete "$TEMP\jre_setup.exe"
  StrCmp $0 "0" InstallVerif 0
  Push "The JRE setup has been abnormally interrupted."
  Goto ExitInstallJRE
 
InstallVerif:
  DetailPrint "Checking the JRE Setup's outcome"
  Call DetectJRE
  Pop $0
  StrCmp $0 "OK" JavaExeVerif 0
  Push "The JRE setup failed"
  Goto ExitInstallJRE
 
JavaExeVerif:
  Pop $1
  IfFileExists $1 JREPathStorage 0
  Push "The following file : $1, cannot be found."
  Goto ExitInstallJRE
 
JREPathStorage:
  !insertmacro MUI_INSTALLOPTIONS_WRITE "jre.ini" \
"UserDefinedSection" "JREPath" $1
  Goto End
 
ExitInstallJRE:
  Pop $2
  MessageBox MB_OK "The setup is about to be interrupted for the following reason : $2"
  Quit
End:
 
SectionEnd
 
Section /o "Installation of JRE Test" SecJRETest
 
  SetOutPath $INSTDIR
  File /r "installDir\*"
 
  !insertmacro MUI_INSTALLOPTIONS_READ $0 "jre.ini" "UserDefinedSection" "JREPath"
  ;Store install folder
  WriteRegStr HKLM "SOFTWARE\JRE Test" "" $INSTDIR
 
  WriteRegStr HKLM \
"Software\Microsoft\Windows\CurrentVersion\Uninstall\JRE Test" \
"DisplayName" "JRE Test"
  WriteRegStr HKLM \
"Software\Microsoft\Windows\CurrentVersion\Uninstall\JRE Test" \
"UninstallString" '"$INSTDIR\uninstall.exe"'
  WriteRegDWORD HKLM \
"Software\Microsoft\Windows\CurrentVersion\Uninstall\JRE Test" \
"NoModify" "1"
  WriteRegDWORD HKLM \
"Software\Microsoft\Windows\CurrentVersion\Uninstall\JRE Test" \
"NoRepair" "1"
 
  ;Create uninstaller
  WriteUninstaller "$INSTDIR\Uninstall.exe"
 
SectionEnd
 
Section /o "Start menu shortcuts" SecCreateShortcut
 
  CreateDirectory "$SMPROGRAMS\JRE Test"
  CreateShortCut "$SMPROGRAMS\JRE Test\Uninstall.lnk" \
"$INSTDIR\uninstall.exe" "" "$INSTDIR\uninstall.exe" 0
  CreateShortCut "$SMPROGRAMS\JRE Test\JRE Test.lnk" \
"$INSTDIR\jretext.exe" "" "$INSTDIR\jretest.exe" 0
 
SectionEnd
 
;--------------------------------
;Descriptions
 
!insertmacro MUI_FUNCTION_DESCRIPTION_BEGIN
  !insertmacro MUI_DESCRIPTION_TEXT ${SecJRETest} $(DESC_SecJRETest)
!insertmacro MUI_FUNCTION_DESCRIPTION_END
 
;--------------------------------
;Installer Functions
 
Function .onInit
 
  ;Extract InstallOptions INI Files
  !insertmacro MUI_INSTALLOPTIONS_EXTRACT "jre.ini"
  Call SetupSections
 
FunctionEnd
 
Function myPreInstfiles
 
  Call RestoreSections
  SetAutoClose true
 
FunctionEnd
 
FunctionEnd
 
Function CheckInstalledJRE
  Call DetectJRE
  Pop ${TEMP}
  StrCmp ${TEMP} "OK" NoDownloadJRE
  Pop ${TEMP2}
  StrCmp ${TEMP2} "None" NoFound FoundOld
 
FoundOld:
  !insertmacro MUI_INSTALLOPTIONS_WRITE "jre.ini" "Field 1" "Text" "JRE Test requires a more recent version of the Java Runtime Environment \
than the one found on your computer.
The installation of JRE \
${JRE_VERSION} will start."
  !insertmacro MUI_HEADER_TEXT "$(TEXT_JRE_TITLE)" "$(TEXT_JRE_SUBTITLE)"
  !insertmacro MUI_INSTALLOPTIONS_DISPLAY_RETURN "jre.ini"
  Goto DownloadJRE
 
NoFound:
  !insertmacro MUI_INSTALLOPTIONS_WRITE "jre.ini" "Field 1" "Text" "No Java Runtime Environment could be found on your computer \
 
The installation of JRE v${JRE_VERSION} will start."
  !insertmacro MUI_HEADER_TEXT "$(TEXT_JRE_TITLE)" "$(TEXT_JRE_SUBTITLE)"
  !insertmacro MUI_INSTALLOPTIONS_DISPLAY "jre.ini"
  Goto DownloadJRE
 
DownloadJRE:
  StrCpy ${DOWNLOAD_JRE_FLAG} "Download"
  Return
 
NoDownloadJRE:
  Pop ${TEMP2}
  StrCpy ${DOWNLOAD_JRE_FLAG} "NoDownload"
  !insertmacro MUI_INSTALLOPTIONS_WRITE "jre.ini" \
"UserDefinedSection" "JREPath" \
${TEMP2}
  Return
 
ExitInstall:
  Quit
 
FunctionEnd
 
 
Function DetectJRE
  ReadRegStr ${TEMP2} HKLM "SOFTWARE\JavaSoft\Java Runtime Environment" \
"CurrentVersion"
  StrCmp ${TEMP2} "" DetectTry2
  ReadRegStr ${TEMP3} HKLM \
"SOFTWARE\JavaSoft\Java Runtime Environment\${TEMP2}" "JavaHome"
  StrCmp ${TEMP3} "" DetectTry2
  Goto GetJRE
 
DetectTry2:
  ReadRegStr ${TEMP2} HKLM "SOFTWARE\JavaSoft\Java Development Kit" \
"CurrentVersion"
  StrCmp ${TEMP2} "" NoFound
  ReadRegStr ${TEMP3} HKLM \
"SOFTWARE\JavaSoft\Java Runtime Environment\${TEMP2}" "JavaHome"
  StrCmp ${TEMP3} "" NoFound
 
GetJRE:
  IfFileExists "${TEMP3}\bin\java.exe" 0 NoFound
  StrCpy ${VAL1} ${TEMP2} 1
  StrCpy ${VAL2} ${JRE_VERSION} 1
  IntCmp ${VAL1} ${VAL2} 0 FoundOld FoundNew
  StrCpy ${VAL1} ${TEMP2} 1 2
  StrCpy ${VAL2} ${JRE_VERSION} 1 2
  IntCmp ${VAL1} ${VAL2} FoundNew FoundOld FoundNew
 
NoFound:
  Push "None"
  Push "NOK"
  Return
 
FoundOld:
  Push ${TEMP2}
  Push "NOK"
  Return
 
FoundNew:
  Push "${TEMP3}\bin\java.exe"
  Push "OK"
  Return
 
FunctionEnd
 
Function RestoreSections
  !insertmacro UnselectSection ${jre}
  !insertmacro SelectSection ${SecJRETest}
  !insertmacro SelectSection ${SecCreateShortcut}
 
FunctionEnd
 
Function SetupSections
  !insertmacro SelectSection ${jre}
  !insertmacro UnselectSection ${SecJRETest}
  !insertmacro UnselectSection ${SecCreateShortcut}
FunctionEnd
 
;--------------------------------
;Uninstaller Section
 
Section "Uninstall"
 
  ; remove registry keys
  DeleteRegKey HKLM \
"Software\Microsoft\Windows\CurrentVersion\Uninstall\JRE Test"
  DeleteRegKey HKLM  "SOFTWARE\JRE Test"
  ; remove shortcuts, if any.
  Delete "$SMPROGRAMS\JRE Test\*.*"
  ; remove files
  RMDir /r "$INSTDIR"
 
SectionEnd