The Tor Browser: browser/installer/windows/nsis/uninstaller.nsi@6474c204b198 (annotated)

browser/installer/windows/nsis/uninstaller.nsi@6474c204b198 (annotated)

browser/installer/windows/nsis/uninstaller.nsi

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rwxr-xr-x

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 # This Source Code Form is subject to the terms of the Mozilla Public
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 # Required Plugins:
 # AppAssocReg http://nsis.sourceforge.net/Application_Association_Registration_plug-in
 # CityHash    http://mxr.mozilla.org/mozilla-central/source/other-licenses/nsis/Contrib/CityHash
 # ShellLink   http://nsis.sourceforge.net/ShellLink_plug-in
 # UAC         http://nsis.sourceforge.net/UAC_plug-in
 ; Set verbosity to 3 (e.g. no script) to lessen the noise in the build logs
 !verbose 3
 ; 7-Zip provides better compression than the lzma from NSIS so we add the files
 ; uncompressed and use 7-Zip to create a SFX archive of it
 SetDatablockOptimize on
 SetCompress off
 CRCCheck on
 RequestExecutionLevel user
 ; The commands inside this ifdef require NSIS 3.0a2 or greater so the ifdef can
 ; be removed after we require NSIS 3.0a2 or greater.
 !ifdef NSIS_PACKEDVERSION
   Unicode true
   ManifestSupportedOS all
   ManifestDPIAware true
 !endif
 !addplugindir ./
 ; On Vista and above attempt to elevate Standard Users in addition to users that
 ; are a member of the Administrators group.
 !define NONADMIN_ELEVATE
 ; prevents compiling of the reg write logging.
 !define NO_LOG
 !define MaintUninstallKey \
  "Software\Microsoft\Windows\CurrentVersion\Uninstall\MozillaMaintenanceService"
 Var TmpVal
 Var MaintCertKey
 ; Other included files may depend upon these includes!
 ; The following includes are provided by NSIS.
 !include FileFunc.nsh
 !include LogicLib.nsh
 !include MUI.nsh
 !include WinMessages.nsh
 !include WinVer.nsh
 !include WordFunc.nsh
 !insertmacro GetSize
 !insertmacro StrFilter
 !insertmacro WordReplace
 !insertmacro un.GetParent
 ; The following includes are custom.
 !include branding.nsi
 !include defines.nsi
 !include common.nsh
 !include locales.nsi
 ; This is named BrandShortName helper because we use this for software update
 ; post update cleanup.
 VIAddVersionKey "FileDescription" "${BrandShortName} Helper"
 VIAddVersionKey "OriginalFilename" "helper.exe"
 !insertmacro AddDisabledDDEHandlerValues
 !insertmacro CleanVirtualStore
 !insertmacro ElevateUAC
 !insertmacro GetLongPath
 !insertmacro GetPathFromString
 !insertmacro InitHashAppModelId
 !insertmacro IsHandlerForInstallDir
 !insertmacro IsPinnedToTaskBar
 !insertmacro IsUserAdmin
 !insertmacro LogDesktopShortcut
 !insertmacro LogQuickLaunchShortcut
 !insertmacro LogStartMenuShortcut
 !insertmacro PinnedToStartMenuLnkCount
 !insertmacro RegCleanAppHandler
 !insertmacro RegCleanMain
 !insertmacro RegCleanUninstall
 !ifdef MOZ_METRO
 !insertmacro RemoveDEHRegistrationIfMatching
 !endif
 !insertmacro SetAppLSPCategories
 !insertmacro SetBrandNameVars
 !insertmacro UpdateShortcutAppModelIDs
 !insertmacro UnloadUAC
 !insertmacro WriteRegDWORD2
 !insertmacro WriteRegStr2
 !insertmacro CheckIfRegistryKeyExists
 !insertmacro un.ChangeMUIHeaderImage
 !insertmacro un.CheckForFilesInUse
 !insertmacro un.CleanUpdateDirectories
 !insertmacro un.CleanVirtualStore
 !insertmacro un.DeleteShortcuts
 !insertmacro un.GetLongPath
 !insertmacro un.GetSecondInstallPath
 !insertmacro un.InitHashAppModelId
 !insertmacro un.ManualCloseAppPrompt
 !insertmacro un.ParseUninstallLog
 !insertmacro un.RegCleanAppHandler
 !insertmacro un.RegCleanFileHandler
 !insertmacro un.RegCleanMain
 !insertmacro un.RegCleanUninstall
 !insertmacro un.RegCleanProtocolHandler
 !ifdef MOZ_METRO
 !insertmacro un.RemoveDEHRegistrationIfMatching
 !endif
 !insertmacro un.RemoveQuotesFromPath
 !insertmacro un.SetAppLSPCategories
 !insertmacro un.SetBrandNameVars
 !include shared.nsh
 ; Helper macros for ui callbacks. Insert these after shared.nsh
 !insertmacro OnEndCommon
 !insertmacro UninstallOnInitCommon
 !insertmacro un.OnEndCommon
 !insertmacro un.UninstallUnOnInitCommon
 Name "${BrandFullName}"
 OutFile "helper.exe"
 !ifdef HAVE_64BIT_OS
   InstallDir "$PROGRAMFILES64\${BrandFullName}\"
 !else
   InstallDir "$PROGRAMFILES32\${BrandFullName}\"
 !endif
 ShowUnInstDetails nevershow
 ################################################################################
 # Modern User Interface - MUI
 !define MUI_ABORTWARNING
 !define MUI_ICON setup.ico
 !define MUI_UNICON setup.ico
 !define MUI_WELCOMEPAGE_TITLE_3LINES
 !define MUI_HEADERIMAGE
 !define MUI_HEADERIMAGE_RIGHT
 !define MUI_UNWELCOMEFINISHPAGE_BITMAP wizWatermark.bmp
 ; Use a right to left header image when the language is right to left
 !ifdef ${AB_CD}_rtl
 !define MUI_HEADERIMAGE_BITMAP_RTL wizHeaderRTL.bmp
 !else
 !define MUI_HEADERIMAGE_BITMAP wizHeader.bmp
 !endif
 /**
  * Uninstall Pages
  */
 ; Welcome Page
 !define MUI_PAGE_CUSTOMFUNCTION_PRE un.preWelcome
 !define MUI_PAGE_CUSTOMFUNCTION_LEAVE un.leaveWelcome
 !insertmacro MUI_UNPAGE_WELCOME
 ; Custom Uninstall Confirm Page
 UninstPage custom un.preConfirm un.leaveConfirm
 ; Remove Files Page
 !insertmacro MUI_UNPAGE_INSTFILES
 ; Finish Page
 ; Don't setup the survey controls, functions, etc. when the application has
 ; defined NO_UNINSTALL_SURVEY
 !ifndef NO_UNINSTALL_SURVEY
 !define MUI_PAGE_CUSTOMFUNCTION_PRE un.preFinish
 !define MUI_FINISHPAGE_SHOWREADME_NOTCHECKED
 !define MUI_FINISHPAGE_SHOWREADME ""
 !define MUI_FINISHPAGE_SHOWREADME_TEXT $(SURVEY_TEXT)
 !define MUI_FINISHPAGE_SHOWREADME_FUNCTION un.Survey
 !endif
 !insertmacro MUI_UNPAGE_FINISH
 ; Use the default dialog for IDD_VERIFY for a simple Banner
 ChangeUI IDD_VERIFY "${NSISDIR}\Contrib\UIs\default.exe"
 ; This function is used to uninstall the maintenance service if the
 ; application currently being uninstalled is the last application to use the
 ; maintenance service.
 Function un.UninstallServiceIfNotUsed
   ; $0 will store if a subkey exists
   ; $1 will store the first subkey if it exists or an empty string if it doesn't
   ; Backup the old values
   Push $0
   Push $1
   ; The maintenance service always uses the 64-bit registry on x64 systems
   ${If} ${RunningX64}
     SetRegView 64
   ${EndIf}
   ; Figure out the number of subkeys
   StrCpy $0 0
 loop:
   EnumRegKey $1 HKLM "Software\Mozilla\MaintenanceService" $0
   StrCmp $1 "" doneCount
   IntOp $0 $0 + 1
   goto loop
 doneCount:
   ; Restore back the registry view
   ${If} ${RunningX64}
     SetRegView lastUsed
   ${EndIf}
   ${If} $0 == 0
     ; Get the path of the maintenance service uninstaller
     ReadRegStr $1 HKLM ${MaintUninstallKey} "UninstallString"
     ; If the uninstall string does not exist, skip executing it
     StrCmp $1 "" doneUninstall
     ; $1 is already a quoted string pointing to the install path
     ; so we're already protected against paths with spaces
     nsExec::Exec "$1 /S"
 doneUninstall:
   ${EndIf}
   ; Restore the old value of $1 and $0
   Pop $1
   Pop $0
 FunctionEnd
 ################################################################################
 # Install Sections
 ; Empty section required for the installer to compile as an uninstaller
 Section ""
 SectionEnd
 ################################################################################
 # Uninstall Sections
 Section "Uninstall"
   SetDetailsPrint textonly
   DetailPrint $(STATUS_UNINSTALL_MAIN)
   SetDetailsPrint none
   ; Delete the app exe to prevent launching the app while we are uninstalling.
   ClearErrors
   ${DeleteFile} "$INSTDIR\${FileMainEXE}"
   ${If} ${Errors}
     ; If the user closed the application it can take several seconds for it to
     ; shut down completely. If the application is being used by another user we
     ; can still delete the files when the system is restarted.
     Sleep 5000
     ${DeleteFile} "$INSTDIR\${FileMainEXE}"
     ClearErrors
   ${EndIf}
   ; setup the application model id registration value
   ${un.InitHashAppModelId} "$INSTDIR" "Software\Mozilla\${AppName}\TaskBarIDs"
   SetShellVarContext current  ; Set SHCTX to HKCU
   ${un.RegCleanMain} "Software\Mozilla"
   ${un.RegCleanUninstall}
   ${un.DeleteShortcuts}
   ; Unregister resources associated with Win7 taskbar jump lists.
   ${If} ${AtLeastWin7}
   ${AndIf} "$AppUserModelID" != ""
     ApplicationID::UninstallJumpLists "$AppUserModelID"
   ${EndIf}
   ; Remove the updates directory for Vista and above
   ${un.CleanUpdateDirectories} "Mozilla\Firefox" "Mozilla\updates"
   ; Remove any app model id's stored in the registry for this install path
   DeleteRegValue HKCU "Software\Mozilla\${AppName}\TaskBarIDs" "$INSTDIR"
   DeleteRegValue HKLM "Software\Mozilla\${AppName}\TaskBarIDs" "$INSTDIR"
   ClearErrors
   WriteRegStr HKLM "Software\Mozilla" "${BrandShortName}InstallerTest" "Write Test"
   ${If} ${Errors}
     StrCpy $TmpVal "HKCU" ; used primarily for logging
   ${Else}
     SetShellVarContext all  ; Set SHCTX to HKLM
     DeleteRegValue HKLM "Software\Mozilla" "${BrandShortName}InstallerTest"
     StrCpy $TmpVal "HKLM" ; used primarily for logging
     ${un.RegCleanMain} "Software\Mozilla"
     ${un.RegCleanUninstall}
     ${un.DeleteShortcuts}
     ${un.SetAppLSPCategories}
   ${EndIf}
 !ifdef MOZ_METRO
   ${If} ${AtLeastWin8}
     ${un.CleanupMetroBrowserHandlerValues} ${DELEGATE_EXECUTE_HANDLER_ID} \
                                            "FirefoxURL" \
                                            "FirefoxHTML"
   ${EndIf}
   ${ResetWin8PromptKeys} "HKCU" ""
   ${ResetWin8MetroSplash}
 !else
   ; The metro browser is not enabled by the mozconfig.
   ${If} ${AtLeastWin8}
     ${RemoveDEHRegistration} ${DELEGATE_EXECUTE_HANDLER_ID} \
                              $AppUserModelID \
                              "FirefoxURL" \
                              "FirefoxHTML"
   ${EndIf}
 !endif
   ${un.RegCleanAppHandler} "FirefoxURL"
   ${un.RegCleanAppHandler} "FirefoxHTML"
   ${un.RegCleanProtocolHandler} "ftp"
   ${un.RegCleanProtocolHandler} "http"
   ${un.RegCleanProtocolHandler} "https"
   ClearErrors
   ReadRegStr $R9 HKCR "FirefoxHTML" ""
   ; Don't clean up the file handlers if the FirefoxHTML key still exists since
   ; there should be a second installation that may be the default file handler
   ${If} ${Errors}
     ${un.RegCleanFileHandler}  ".htm"   "FirefoxHTML"
     ${un.RegCleanFileHandler}  ".html"  "FirefoxHTML"
     ${un.RegCleanFileHandler}  ".shtml" "FirefoxHTML"
     ${un.RegCleanFileHandler}  ".xht"   "FirefoxHTML"
     ${un.RegCleanFileHandler}  ".xhtml" "FirefoxHTML"
     ${un.RegCleanFileHandler}  ".oga"  "FirefoxHTML"
     ${un.RegCleanFileHandler}  ".ogg"  "FirefoxHTML"
     ${un.RegCleanFileHandler}  ".ogv"  "FirefoxHTML"
     ${un.RegCleanFileHandler}  ".pdf"  "FirefoxHTML"
     ${un.RegCleanFileHandler}  ".webm"  "FirefoxHTML"
   ${EndIf}
   SetShellVarContext all  ; Set SHCTX to HKLM
   ${un.GetSecondInstallPath} "Software\Mozilla" $R9
   ${If} $R9 == "false"
     SetShellVarContext current  ; Set SHCTX to HKCU
     ${un.GetSecondInstallPath} "Software\Mozilla" $R9
   ${EndIf}
   StrCpy $0 "Software\Clients\StartMenuInternet\${FileMainEXE}\shell\open\command"
   ReadRegStr $R1 HKLM "$0" ""
   ${un.RemoveQuotesFromPath} "$R1" $R1
   ${un.GetParent} "$R1" $R1
   ; Only remove the StartMenuInternet key if it refers to this install location.
   ; The StartMenuInternet registry key is independent of the default browser
   ; settings. The XPInstall base un-installer always removes this key if it is
   ; uninstalling the default browser and it will always replace the keys when
   ; installing even if there is another install of Firefox that is set as the
   ; default browser. Now the key is always updated on install but it is only
   ; removed if it refers to this install location.
   ${If} "$INSTDIR" == "$R1"
     DeleteRegKey HKLM "Software\Clients\StartMenuInternet\${FileMainEXE}"
     DeleteRegValue HKLM "Software\RegisteredApplications" "${AppRegName}"
   ${EndIf}
   ReadRegStr $R1 HKCU "$0" ""
   ${un.RemoveQuotesFromPath} "$R1" $R1
   ${un.GetParent} "$R1" $R1
   ; Only remove the StartMenuInternet key if it refers to this install location.
   ; The StartMenuInternet registry key is independent of the default browser
   ; settings. The XPInstall base un-installer always removes this key if it is
   ; uninstalling the default browser and it will always replace the keys when
   ; installing even if there is another install of Firefox that is set as the
   ; default browser. Now the key is always updated on install but it is only
   ; removed if it refers to this install location.
   ${If} "$INSTDIR" == "$R1"
     DeleteRegKey HKCU "Software\Clients\StartMenuInternet\${FileMainEXE}"
     DeleteRegValue HKCU "Software\RegisteredApplications" "${AppRegName}"
   ${EndIf}
   StrCpy $0 "Software\Microsoft\Windows\CurrentVersion\App Paths\${FileMainEXE}"
   ${If} $R9 == "false"
     DeleteRegKey HKLM "$0"
     DeleteRegKey HKCU "$0"
     StrCpy $0 "Software\Microsoft\MediaPlayer\ShimInclusionList\${FileMainEXE}"
     DeleteRegKey HKLM "$0"
     DeleteRegKey HKCU "$0"
     StrCpy $0 "Software\Microsoft\MediaPlayer\ShimInclusionList\plugin-container.exe"
     DeleteRegKey HKLM "$0"
     DeleteRegKey HKCU "$0"
     StrCpy $0 "Software\Classes\MIME\Database\Content Type\application/x-xpinstall;app=firefox"
     DeleteRegKey HKLM "$0"
     DeleteRegKey HKCU "$0"
   ${Else}
     ReadRegStr $R1 HKLM "$0" ""
     ${un.RemoveQuotesFromPath} "$R1" $R1
     ${un.GetParent} "$R1" $R1
     ${If} "$INSTDIR" == "$R1"
       WriteRegStr HKLM "$0" "" "$R9"
       ${un.GetParent} "$R9" $R1
       WriteRegStr HKLM "$0" "Path" "$R1"
     ${EndIf}
   ${EndIf}
   ; Remove directories and files we always control before parsing the uninstall
   ; log so empty directories can be removed.
   ${If} ${FileExists} "$INSTDIR\updates"
     RmDir /r /REBOOTOK "$INSTDIR\updates"
   ${EndIf}
   ${If} ${FileExists} "$INSTDIR\updated"
     RmDir /r /REBOOTOK "$INSTDIR\updated"
   ${EndIf}
   ${If} ${FileExists} "$INSTDIR\defaults\shortcuts"
     RmDir /r /REBOOTOK "$INSTDIR\defaults\shortcuts"
   ${EndIf}
   ${If} ${FileExists} "$INSTDIR\distribution"
     RmDir /r /REBOOTOK "$INSTDIR\distribution"
   ${EndIf}
   ${If} ${FileExists} "$INSTDIR\removed-files"
     Delete /REBOOTOK "$INSTDIR\removed-files"
   ${EndIf}
   ; Remove files that may be left behind by the application in the
   ; VirtualStore directory.
   ${un.CleanVirtualStore}
   ; Parse the uninstall log to unregister dll's and remove all installed
   ; files / directories this install is responsible for.
   ${un.ParseUninstallLog}
   ; Remove the uninstall directory that we control
   RmDir /r /REBOOTOK "$INSTDIR\uninstall"
   ; Explictly remove empty webapprt dir in case it exists
   ; See bug 757978
   RmDir "$INSTDIR\webapprt\components"
   RmDir "$INSTDIR\webapprt"
   RmDir /r /REBOOTOK "$INSTDIR\${TO_BE_DELETED}"
   ; Remove the installation directory if it is empty
   ${RemoveDir} "$INSTDIR"
   ; If firefox.exe was successfully deleted yet we still need to restart to
   ; remove other files create a dummy firefox.exe.moz-delete to prevent the
   ; installer from allowing an install without restart when it is required
   ; to complete an uninstall.
   ${If} ${RebootFlag}
     ${Unless} ${FileExists} "$INSTDIR\${FileMainEXE}.moz-delete"
       FileOpen $0 "$INSTDIR\${FileMainEXE}.moz-delete" w
       FileWrite $0 "Will be deleted on restart"
       Delete /REBOOTOK "$INSTDIR\${FileMainEXE}.moz-delete"
       FileClose $0
     ${EndUnless}
   ${EndIf}
   ; Refresh desktop icons otherwise the start menu internet item won't be
   ; removed and other ugly things will happen like recreation of the app's
   ; clients registry key by the OS under some conditions.
   System::Call "shell32::SHChangeNotify(i ${SHCNE_ASSOCCHANGED}, i 0, i 0, i 0)"
 !ifdef MOZ_MAINTENANCE_SERVICE
   ; Get the path the allowed cert is at and remove it
   ; Keep this block of code last since it modfies the reg view
   ServicesHelper::PathToUniqueRegistryPath "$INSTDIR"
   Pop $MaintCertKey
   ${If} $MaintCertKey != ""
     ; We always use the 64bit registry for certs
     ${If} ${RunningX64}
       SetRegView 64
     ${EndIf}
     DeleteRegKey HKLM "$MaintCertKey"
     ${If} ${RunningX64}
       SetRegView lastused
     ${EndIf}
   ${EndIf}
   Call un.UninstallServiceIfNotUsed
 !endif
 SectionEnd
 ################################################################################
 # Helper Functions
 ; Don't setup the survey controls, functions, etc. when the application has
 ; defined NO_UNINSTALL_SURVEY
 !ifndef NO_UNINSTALL_SURVEY
 Function un.Survey
   Exec "$\"$TmpVal$\" $\"${SurveyURL}$\""
 FunctionEnd
 !endif
 ################################################################################
 # Language
 !insertmacro MOZ_MUI_LANGUAGE 'baseLocale'
 !verbose push
 !verbose 3
 !include "overrideLocale.nsh"
 !include "customLocale.nsh"
 !verbose pop
 ; Set this after the locale files to override it if it is in the locale. Using
 ; " " for BrandingText will hide the "Nullsoft Install System..." branding.
 BrandingText " "
 ################################################################################
 # Page pre, show, and leave functions
 Function un.preWelcome
   ${If} ${FileExists} "$INSTDIR\distribution\modern-wizard.bmp"
     Delete "$PLUGINSDIR\modern-wizard.bmp"
     CopyFiles /SILENT "$INSTDIR\distribution\modern-wizard.bmp" "$PLUGINSDIR\modern-wizard.bmp"
   ${EndIf}
 FunctionEnd
 Function un.leaveWelcome
   ${If} ${FileExists} "$INSTDIR\${FileMainEXE}"
     Banner::show /NOUNLOAD "$(BANNER_CHECK_EXISTING)"
     ; If the message window has been found previously give the app an additional
     ; five seconds to close.
     ${If} "$TmpVal" == "FoundMessageWindow"
       Sleep 5000
     ${EndIf}
     ${PushFilesToCheck}
     ${un.CheckForFilesInUse} $TmpVal
     Banner::destroy
     ; If there are files in use $TmpVal will be "true"
     ${If} "$TmpVal" == "true"
       ; If the message window is found the call to ManualCloseAppPrompt will
       ; abort leaving the value of $TmpVal set to "FoundMessageWindow".
       StrCpy $TmpVal "FoundMessageWindow"
       ${un.ManualCloseAppPrompt} "${WindowClass}" "$(WARN_MANUALLY_CLOSE_APP_UNINSTALL)"
       ; If the message window is not found set $TmpVal to "true" so the restart
       ; required message is displayed.
       StrCpy $TmpVal "true"
     ${EndIf}
   ${EndIf}
 FunctionEnd
 Function un.preConfirm
   ${If} ${FileExists} "$INSTDIR\distribution\modern-header.bmp"
   ${AndIf} $hHeaderBitmap == ""
     Delete "$PLUGINSDIR\modern-header.bmp"
     CopyFiles /SILENT "$INSTDIR\distribution\modern-header.bmp" "$PLUGINSDIR\modern-header.bmp"
     ${un.ChangeMUIHeaderImage} "$PLUGINSDIR\modern-header.bmp"
   ${EndIf}
   ; Setup the unconfirm.ini file for the Custom Uninstall Confirm Page
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Settings" NumFields "3"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 1" Type   "label"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 1" Text   "$(UN_CONFIRM_UNINSTALLED_FROM)"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 1" Left   "0"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 1" Right  "-1"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 1" Top    "5"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 1" Bottom "15"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" Type   "text"
   ; The contents of this control must be set as follows in the pre function
   ; ${MUI_INSTALLOPTIONS_READ} $1 "unconfirm.ini" "Field 2" "HWND"
   ; SendMessage $1 ${WM_SETTEXT} 0 "STR:$INSTDIR"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" State  ""
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" Left   "0"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" Right  "-1"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" Top    "17"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" Bottom "30"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 2" flags  "READONLY"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 3" Type   "label"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 3" Text   "$(UN_CONFIRM_CLICK)"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 3" Left   "0"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 3" Right  "-1"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 3" Top    "130"
   WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 3" Bottom "150"
   ${If} "$TmpVal" == "true"
     WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 4" Type   "label"
     WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 4" Text   "$(SUMMARY_REBOOT_REQUIRED_UNINSTALL)"
     WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 4" Left   "0"
     WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 4" Right  "-1"
     WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 4" Top    "35"
     WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Field 4" Bottom "45"
     WriteINIStr "$PLUGINSDIR\unconfirm.ini" "Settings" NumFields "4"
   ${EndIf}
   !insertmacro MUI_HEADER_TEXT "$(UN_CONFIRM_PAGE_TITLE)" "$(UN_CONFIRM_PAGE_SUBTITLE)"
   ; The Summary custom page has a textbox that will automatically receive
   ; focus. This sets the focus to the Install button instead.
   !insertmacro MUI_INSTALLOPTIONS_INITDIALOG "unconfirm.ini"
   GetDlgItem $0 $HWNDPARENT 1
   System::Call "user32::SetFocus(i r0, i 0x0007, i,i)i"
   ${MUI_INSTALLOPTIONS_READ} $1 "unconfirm.ini" "Field 2" "HWND"
   SendMessage $1 ${WM_SETTEXT} 0 "STR:$INSTDIR"
   !insertmacro MUI_INSTALLOPTIONS_SHOW
 FunctionEnd
 Function un.leaveConfirm
   ; Try to delete the app executable and if we can't delete it try to find the
   ; app's message window and prompt the user to close the app. This allows
   ; running an instance that is located in another directory. If for whatever
   ; reason there is no message window we will just rename the app's files and
   ; then remove them on restart if they are in use.
   ClearErrors
   ${DeleteFile} "$INSTDIR\${FileMainEXE}"
   ${If} ${Errors}
     ${un.ManualCloseAppPrompt} "${WindowClass}" "$(WARN_MANUALLY_CLOSE_APP_UNINSTALL)"
   ${EndIf}
 FunctionEnd
 !ifndef NO_UNINSTALL_SURVEY
 Function un.preFinish
   ; Do not modify the finish page if there is a reboot pending
   ${Unless} ${RebootFlag}
     ; Setup the survey controls, functions, etc.
     StrCpy $TmpVal "SOFTWARE\Microsoft\IE Setup\Setup"
     ClearErrors
     ReadRegStr $0 HKLM $TmpVal "Path"
     ${If} ${Errors}
       !insertmacro MUI_INSTALLOPTIONS_WRITE "ioSpecial.ini" "settings" "NumFields" "3"
     ${Else}
       ExpandEnvStrings $0 "$0" ; this value will usually contain %programfiles%
       ${If} $0 != "\"
         StrCpy $0 "$0\"
       ${EndIf}
       StrCpy $0 "$0\iexplore.exe"
       ClearErrors
       GetFullPathName $TmpVal $0
       ${If} ${Errors}
         !insertmacro MUI_INSTALLOPTIONS_WRITE "ioSpecial.ini" "settings" "NumFields" "3"
       ${Else}
         ; When we add an optional action to the finish page the cancel button
         ; is enabled. This disables it and leaves the finish button as the
         ; only choice.
         !insertmacro MUI_INSTALLOPTIONS_WRITE "ioSpecial.ini" "settings" "cancelenabled" "0"
       ${EndIf}
     ${EndIf}
   ${EndUnless}
 FunctionEnd
 !endif
 ################################################################################
 # Initialization Functions
 Function .onInit
   ; Remove the current exe directory from the search order.
   ; This only effects LoadLibrary calls and not implicitly loaded DLLs.
   System::Call 'kernel32::SetDllDirectoryW(w "")'
   ; We need this set up for most of the helper.exe operations.
   ${UninstallOnInitCommon}
 FunctionEnd
 Function un.onInit
   ; Remove the current exe directory from the search order.
   ; This only effects LoadLibrary calls and not implicitly loaded DLLs.
   System::Call 'kernel32::SetDllDirectoryW(w "")'
   StrCpy $LANGUAGE 0
   ${un.UninstallUnOnInitCommon}
 ; The commands inside this ifndef are needed prior to NSIS 3.0a2 and can be
 ; removed after we require NSIS 3.0a2 or greater.
 !ifndef NSIS_PACKEDVERSION
   ${If} ${AtLeastWinVista}
     System::Call 'user32::SetProcessDPIAware()'
   ${EndIf}
 !endif
   !insertmacro InitInstallOptionsFile "unconfirm.ini"
 FunctionEnd
 Function .onGUIEnd
   ${OnEndCommon}
 FunctionEnd
 Function un.onGUIEnd
   ${un.OnEndCommon}
 FunctionEnd

The Tor Browser / annotate

browser/installer/windows/nsis/uninstaller.nsi@6474c204b198 (annotated)

browser/installer/windows/nsis/uninstaller.nsi