inno-setuppascalscript

Uninstallation order

Can I find somewhere actual order, in which events and sections are executed during uninstall? For example, will UninstallDelete occur earlier than usPostUninstall uninstall step?

Inno Setup has "Installation order" article in manual, but it looks more like compilation order, not execution.

Solution

  • The uninstallation order is an opposite of the installation order, just as the manual says (and it is really the installation order, not a compilation order).

    It's simply because there's no programmed uninstallation order. The installer records its steps into uninstall log and the uninstaller just processes the log in an opposite order, without any option to alter the order.

    The event functions fit in the uninstallation process as follows (only major uninstallation steps shown):

    I've tested this on a simple installer:

    [Setup]
AppName=My Program
AppVersion=1.5
DefaultDirName={pf}\My Program
DefaultGroupName=My Program
UninstallDisplayIcon={app}\MyProg.exe
OutputDir=.

[Files]
Source: "MyProg.exe"; DestDir: "{app}"

[Icons]
Name: "{group}\My Program"; Filename: "{app}\MyProg.exe"

[UninstallRun]
FileName: "{app}\MyProg.exe"

[UninstallDelete]
Type: files; Name: "{app}\test.dat"

    [Code]

function InitializeUninstall(): Boolean;
begin
  Log('InitializeUninstall');
  Result := True;
end;

procedure InitializeUninstallProgressForm;
begin
  Log('InitializeUninstallProgressForm');
end;

procedure DeinitializeUninstall;
begin
  Log('DeinitializeUninstall');
end;

procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
begin
  Log('CurUninstallStepChanged + ' + IntToStr(Integer(CurUninstallStep)));
end;

    The uninstaller log is like (it does not show all the steps):

    2025-01-27 11:25:44.024   Log opened. (Time zone: UTC+01:00)
2025-01-27 11:25:44.024   Setup version: Inno Setup version 6.4.0
2025-01-27 11:25:44.024   Original Uninstall EXE: C:\Program Files (x86)\My Program\unins000.exe
2025-01-27 11:25:44.024   Uninstall DAT: C:\Program Files (x86)\My Program\unins000.dat
2025-01-27 11:25:44.024   Uninstall command line: /SECONDPHASE="C:\Program Files (x86)\My Program\unins000.exe" /FIRSTPHASEWND=$180B1A /INITPROCWND=$221010 /log="C:\test\uninstall.log" 
2025-01-27 11:25:44.024   Windows version: 10.0.26100
2025-01-27 11:25:44.024   Windows architecture: x64 (64-bit)
2025-01-27 11:25:44.025   Machine types supported by system: x86 x64
2025-01-27 11:25:44.025   User privileges: Administrative
2025-01-27 11:25:44.025   Administrative install mode: Yes
2025-01-27 11:25:44.025   Install mode root key: HKEY_LOCAL_MACHINE
2025-01-27 11:25:44.027   Created protected temporary directory: C:\Users\marti\AppData\Local\Temp\is-QNLH0.tmp
2025-01-27 11:25:44.028   InitializeUninstall
2025-01-27 11:25:44.028   Message box (Yes/No):
                          Are you sure you want to completely remove My Program and all of its components?
2025-01-27 11:25:44.833   User chose Yes.
2025-01-27 11:25:44.833   CurUninstallStepChanged + 0
2025-01-27 11:25:44.949   InitializeUninstallProgressForm
2025-01-27 11:25:45.011   CurUninstallStepChanged + 1
2025-01-27 11:25:45.011   Starting the uninstallation process.
2025-01-27 11:25:45.014   Running Exec filename: C:\Program Files (x86)\My Program\MyProg.exe
2025-01-27 11:25:46.466   Process exit code: 0
2025-01-27 11:25:46.470   Deleting registry key: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall\My Program_is1
2025-01-27 11:25:46.509   Deleting file: C:\ProgramData\Microsoft\Windows\Start Menu\Programs\My Program\My Program.lnk
2025-01-27 11:25:46.511   Deleting directory: C:\ProgramData\Microsoft\Windows\Start Menu\Programs\My Program
2025-01-27 11:25:46.513   Deleting file: C:\Program Files (x86)\My Program\MyProg.exe
2025-01-27 11:25:46.513   Deleting directory: C:\Program Files (x86)\My Program
2025-01-27 11:25:46.513   Failed to delete directory (145). Will retry later.
2025-01-27 11:25:46.513   Deleting file: C:\Program Files (x86)\My Program\test.dat
2025-01-27 11:25:46.514   Deleting Uninstall data files.
2025-01-27 11:25:47.044   Deleting directory: C:\Program Files (x86)\My Program
2025-01-27 11:25:47.048   Uninstallation process succeeded.
2025-01-27 11:25:47.048   Removed all? Yes
2025-01-27 11:25:47.048   Need to restart Windows? No
2025-01-27 11:25:47.059   CurUninstallStepChanged + 2
2025-01-27 11:25:47.059   Message box (OK):
                          My Program was successfully removed from your computer.
2025-01-27 11:25:47.657   User chose OK.
2025-01-27 11:25:47.657   CurUninstallStepChanged + 3
2025-01-27 11:25:47.657   DeinitializeUninstall
2025-01-27 11:25:47.659   Log closed.