Inno Setup: How to automatically uninstall previous installed version? - installation

I'm using Inno Setup to create an installer.
I want the installer to automatically uninstall the previous installed version, instead of overwriting it. How can I do that?

I have used the following. I'm not sure it's the simplest way to do it but it works.
This uses {#emit SetupSetting("AppId")} which relies on the Inno Setup Preprocessor. If you don't use that, cut-and-paste your App ID in directly.
[Code]
{ ///////////////////////////////////////////////////////////////////// }
function GetUninstallString(): String;
var
sUnInstPath: String;
sUnInstallString: String;
begin
sUnInstPath := ExpandConstant('Software\Microsoft\Windows\CurrentVersion\Uninstall\{#emit SetupSetting("AppId")}_is1');
sUnInstallString := '';
if not RegQueryStringValue(HKLM, sUnInstPath, 'UninstallString', sUnInstallString) then
RegQueryStringValue(HKCU, sUnInstPath, 'UninstallString', sUnInstallString);
Result := sUnInstallString;
end;
{ ///////////////////////////////////////////////////////////////////// }
function IsUpgrade(): Boolean;
begin
Result := (GetUninstallString() <> '');
end;
{ ///////////////////////////////////////////////////////////////////// }
function UnInstallOldVersion(): Integer;
var
sUnInstallString: String;
iResultCode: Integer;
begin
{ Return Values: }
{ 1 - uninstall string is empty }
{ 2 - error executing the UnInstallString }
{ 3 - successfully executed the UnInstallString }
{ default return value }
Result := 0;
{ get the uninstall string of the old app }
sUnInstallString := GetUninstallString();
if sUnInstallString <> '' then begin
sUnInstallString := RemoveQuotes(sUnInstallString);
if Exec(sUnInstallString, '/SILENT /NORESTART /SUPPRESSMSGBOXES','', SW_HIDE, ewWaitUntilTerminated, iResultCode) then
Result := 3
else
Result := 2;
end else
Result := 1;
end;
{ ///////////////////////////////////////////////////////////////////// }
procedure CurStepChanged(CurStep: TSetupStep);
begin
if (CurStep=ssInstall) then
begin
if (IsUpgrade()) then
begin
UnInstallOldVersion();
end;
end;
end;
Alternatives
See also this blog post "Inno Setup Script Sample for Version Comparison" which goes one step further, and reads the version number of any previously installed version, and compares that version number with that of the current installation package.

You should be able to read the uninstall string from the registry, given the AppId (i.e. the value you used for AppID in the [Setup]-section). It could be found under Software\Microsoft\Windows\CurrentVersion\Uninstall\{AppId}\ (could be either HKLM or HKCU, so best check both) where {AppId} should be substituted with the actual value you used. Look for the UninstallString or QuietUninstallString values and use the Exec function to run it from your InitializeSetup() event function.

If you "just want to remove the old icons" (because yours have changed/updated) you can use this:
; attempt to remove previous versions' icons
[InstallDelete]
Type: filesandordirs; Name: {group}\*;
This is run "at the beginning of installation" so basically removes the old icons, and your new ones will still be installed there after this is completely done.
I just do this with every install "in case anything has changed" icon wise (it all gets reinstalled anyway).

When using Inno Setup, there's no reason to uninstall a previous version unless that version was installed by a different installer program. Otherwise upgrades are handled automatically.

Here is a simplified version based on answer from Craig McQueen:
const
UninstallRegisterPath = 'Software\Microsoft\Windows\CurrentVersion\Uninstall\' + '{#emit SetupSetting("AppName")}' + '_is1';
function GetUninstallerPath(): String;
begin
result := '';
if (not RegQueryStringValue(HKLM, UninstallRegisterPath, 'UninstallString', result)) then
RegQueryStringValue(HKCU, UninstallRegisterPath, 'UninstallString', result);
end;
procedure UninstallOldVersion();
var
UninstallerPath: String;
ResultCode: Integer;
begin
UninstallerPath := GetUninstallerPath();
if (UninstallerPath <> '') then begin
Exec(UninstallerPath, '/VERYSILENT /NORESTART /SUPPRESSMSGBOXES', '', SW_HIDE, ewWaitUntilTerminated, ResultCode);
end;
end;
procedure CurStepChanged(CurStep: TSetupStep);
begin
if (CurStep = ssInstall) then
begin
UninstallOldVersion();
end;
end;
Note: in my case, I use AppName instead of AppId.

The answer provided by Craig McQueen is totally viable. Although, I would add those comments:
The {#emit SetupSetting("AppId")} code does not work for me, so I just add my App ID.
I didn't want to execute my uninstallation program, because I have a INI config file stored in the AppData/ folder which is removed by the uninstaller, and I don't want it to be erased when installing a new version. So, I modified a bit the code provided by Craig McQueen to remove the directory where is installed the program, after retrieving its path.
So, regarding the code of Craig McQueen, changes are:
Retrieve the InstallLocation key instead of the UninstallString key.
Use the DelTree function instead of the Exec(sUnInstallString, ...)

For anyone that uses the GetUninstallString() suggested above to force an uninstall inside CurStepChanged() and has disk caching issues, see below for a related solution that actually waits a while after unistallation for the uninstaller exe to be deleted!
Disk caching issue with inno-setup?

For those interested, I wrote a DLL for Inno Setup 6 and later that provides a simple mechanism for supporting automatic uninstall.
The DLL provides a way to detect if the package you are installing is already installed (via AppId) and to decide, based on the installed version, if you want to automatically uninstall it (for example, you might want to automatically uninstall if user is downgrading).
https://github.com/Bill-Stewart/UninsIS

You can exec an uninstaller in the [code] section. You have to figure out how to get the path to the existing uninstaller. For simplicity when I install my apps I add a registry string value that points to the folder containing the uninstaller, and just exec the uninstaller in the InitializeWizard callback.
Keep in mind that Inno setup uninstaller names are all of the form uninsnnn.exe, you need to take that into account in your code.

i got edited #Crain Mc-Queen code , i think this code is better because not need to modified in different project :
[Code]
function GetNumber(var temp: String): Integer;
var
part: String;
pos1: Integer;
begin
if Length(temp) = 0 then
begin
Result := -1;
Exit;
end;
pos1 := Pos('.', temp);
if (pos1 = 0) then
begin
Result := StrToInt(temp);
temp := '';
end
else
begin
part := Copy(temp, 1, pos1 - 1);
temp := Copy(temp, pos1 + 1, Length(temp));
Result := StrToInt(part);
end;
end;
function CompareInner(var temp1, temp2: String): Integer;
var
num1, num2: Integer;
begin
num1 := GetNumber(temp1);
num2 := GetNumber(temp2);
if (num1 = -1) or (num2 = -1) then
begin
Result := 0;
Exit;
end;
if (num1 > num2) then
begin
Result := 1;
end
else if (num1 < num2) then
begin
Result := -1;
end
else
begin
Result := CompareInner(temp1, temp2);
end;
end;
function CompareVersion(str1, str2: String): Integer;
var
temp1, temp2: String;
begin
temp1 := str1;
temp2 := str2;
Result := CompareInner(temp1, temp2);
end;
function InitializeSetup(): Boolean;
var
oldVersion: String;
uninstaller: String;
ErrorCode: Integer;
vCurID :String;
vCurAppName :String;
begin
vCurID:= '{#SetupSetting("AppId")}';
vCurAppName:= '{#SetupSetting("AppName")}';
//remove first "{" of ID
vCurID:= Copy(vCurID, 2, Length(vCurID) - 1);
//
if RegKeyExists(HKEY_LOCAL_MACHINE,
'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\' + vCurID + '_is1') then
begin
RegQueryStringValue(HKEY_LOCAL_MACHINE,
'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\' + vCurID + '_is1',
'DisplayVersion', oldVersion);
if (CompareVersion(oldVersion, '{#SetupSetting("AppVersion")}') < 0) then
begin
if MsgBox('Version ' + oldVersion + ' of ' + vCurAppName + ' is already installed. Continue to use this old version?',
mbConfirmation, MB_YESNO) = IDYES then
begin
Result := False;
end
else
begin
RegQueryStringValue(HKEY_LOCAL_MACHINE,
'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\' + vCurID + '_is1',
'UninstallString', uninstaller);
ShellExec('runas', uninstaller, '/SILENT', '', SW_HIDE, ewWaitUntilTerminated, ErrorCode);
Result := True;
end;
end
else
begin
MsgBox('Version ' + oldVersion + ' of ' + vCurAppName + ' is already installed. This installer will exit.',
mbInformation, MB_OK);
Result := False;
end;
end
else
begin
Result := True;
end;
end;

I must be missing something.
The new files are copied to the target directory before the removal of the old installation occurs.
Then comes the uninstaller deletes them and remove the directory.

Do not use the [Run] section, but the [UninstallRun].
Infact, the program under [Run] are executed after the installation, causing to uninstall your program immediately after the installation :-|
Instead, the [UninstallRun] section is evaluated before the installation.

Follow this link: http://news.jrsoftware.org/news/innosetup/msg55323.html
In InitializeSetup() function, you can call "MSIEXEC /x {your program ID}" after user prompt to uninstall old old version

Related

How to continue download on error in Inno Setup?

My Inno Setup script downloads some resources using built-in functionalities.
It creates Download Wizard Page:
DownloadPage := CreateDownloadPage(SetupMessage(msgWizardPreparing), SetupMessage(msgPreparingDesc), #OnDownloadProgress);
It adds several items that should be downloaded:
if WizardIsTaskSelected('taskA') then
begin
DownloadPage.Add('https://randomresource/taskA.zip', 'taskA.zip', '');
end;
if WizardIsTaskSelected('taskB') then
begin
DownloadPage.Add('https://randomresource/taskB.zip', 'taskB.zip', '');
end;
and last step is to show the Wizard Page and start downloading:
try
try
DownloadPage.Download;
Result := True;
except
SuppressibleMsgBox(AddPeriod(GetExceptionMessage), mbCriticalError, MB_OK, IDOK);
Result := False;
end;
finally
DownloadPage.Hide;
end;
All of the above is basically from examples provided by Inno Setup. There is one issue: if any of the downloads fails (throws exception or anything) it interrupts the whole download process and other items will not be downloaded. I would want it to continue downloading the rest of the files. I went through the Inno Setup documentation and didn't find any flag which would enable that. Is there a solution for that? Thanks in advance.
A simple solution is to download each file separately.
The below code will allow user to select what to do on each file's download error:
Retry the download
Skip the download
Abort the installation.
var
DownloadPage: TDownloadWizardPage;
function RobustDownload(
Url, BaseName, RequiredSHA256OfFile: String): Boolean;
var
Retry: Boolean;
Answer: Integer;
begin
repeat
try
DownloadPage.Clear;
DownloadPage.Add(Url, BaseName, RequiredSHA256OfFile);
DownloadPage.Download;
Retry := False;
Result := True;
except
if DownloadPage.AbortedByUser then
begin
Log('Aborted by user.')
Result := False;
Retry := False;
end
else
begin
// Make sure the page displays the URL that fails to download
DownloadPage.Msg2Label.Caption := Url;
Answer :=
SuppressibleMsgBox(
AddPeriod(GetExceptionMessage),
mbCriticalError, MB_ABORTRETRYIGNORE, IDABORT);
Retry := (Answer = IDRETRY);
Result := (Answer <> IDABORT);
end;
end;
until not Retry;
end;
function NextButtonClick(CurPageID: Integer): Boolean;
begin
if CurPageID = wpReady then
begin
try
DownloadPage :=
CreateDownloadPage(
SetupMessage(msgWizardPreparing), SetupMessage(msgPreparingDesc),
#OnDownloadProgress);
DownloadPage.Show;
Result :=
RobustDownload('https://example.com/setup1.exe', 'setup1.exe', '') and
RobustDownload('https://example.com/setup2.exe', 'setup2.exe', '') and
RobustDownload('https://example.com/setup3.exe', 'setup3.exe', '');
finally
DownloadPage.Hide;
end;
end
else Result := True;
end;

Waiting for uninstaller prompt in usPostUninstall before proceeding with installation in Inno Setup

Is there any way to pause the execution of Inno Setup until user makes some interactions with the message box. I am using a message box to confirm whether or not to keep user data. I want to stop all other executions in setup until the user selects yes or no.
procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
begin
if CurUninstallStep = usPostUninstall then
begin
if DirExists(ExpandConstant('{localappdata}\{#MyBuildId}\storage')) then
if MsgBox('Do you want to delete the saved user data?',
mbConfirmation, MB_YESNO) = IDYES
then
DelTree(ExpandConstant('{localappdata}\{#MyBuildId}\storage'), True, True, True);
end;
end;
I am using a separate procedure to uninstall the previous version in the beginning of the install.
procedure CurStepChanged(CurStep: TSetupStep);
begin
if (CurStep=ssInstall) then
begin
if (IsUpgrade()) then
begin
UnInstallOldVersion();
end;
end;
end;
So when starting to install a new setup first it uninstalls the old version. The user data deletion message box is also shown. But the execution is not pausing. It uninstalls and reinstalls the app while the message box is showing
function GetUninstallString(): String;
var
sUnInstPath: String;
sUnInstallString: String;
begin
sUnInstPath :=
ExpandConstant('Software\Microsoft\Windows\CurrentVersion\Uninstall\{#MyAppId}_is1');
sUnInstallString := '';
if not RegQueryStringValue(HKLM, sUnInstPath, 'UninstallString', sUnInstallString) then
RegQueryStringValue(HKCU, sUnInstPath, 'UninstallString', sUnInstallString);
Result := sUnInstallString;
end;
function UnInstallOldVersion(): Integer;
var
sUnInstallString: String;
iResultCode: Integer;
begin
{ Return Values: }
{ 1 - uninstall string is empty }
{ 2 - error executing the UnInstallString }
{ 3 - successfully executed the UnInstallString }
// default return value
Result := 0;
{ get the uninstall string of the old app }
sUnInstallString := GetUninstallString();
if sUnInstallString <> '' then begin
sUnInstallString := RemoveQuotes(sUnInstallString);
if Exec(sUnInstallString, '/SILENT /NORESTART','', SW_HIDE,
ewWaitUntilTerminated, iResultCode) then
Result := 3
else
Result := 2;
end else
Result := 1;
end;
When you execute the Inno Setup uninstaller .exe, it clones itself to a temporary folder and runs the clone internally. The main process waits for the clone to (almost) finish, before it terminates itself. The clone can then delete the main uninstaller .exe (as it is not locked anymore). The main process is terminated just after the actual uninstallation completes. But before CurUninstallStepChanged(usPostUninstall). So if you display your message box there, the main uninstaller process is terminated already and so is the Exec in UnInstallOldVersion.
If possible, do the data deletion on usUninstall, not on usPostUninstall.

Download and run sub install - Inno Download Plugin progress bar does not move during download

Ok, so I created the following iss but I the progress bar does not move. I want the setup file to download and run the other setup program. Everything works fine except the progress bar does not move.
#define MyAppName "My Program Setup Downloader"
#define MySetupAppName "My Program Setup.exe"
#define MySetupUrlFolder "https://www.example.com/folder/"
#pragma include __INCLUDE__ + ";" + "c:\Program Files (x86)\Inno Download Plugin\"
[Setup]
AppName={#MyAppName}
AppVerName={#MyAppName}
DisableReadyPage=yes
DisableFinishedPage=yes
CreateAppDir=no
Uninstallable=no
#include <idp.iss>
[Code]
var FileName: string;
procedure InitializeWizard;
var DownloadUrl: String;
begin
FileName := ExpandConstant('{tmp}\{#MySetupAppName}');
DownloadUrl := '{#MySetupUrlFolder}{#MySetupAppName}';
idpAddFile(DownloadUrl, FileName);
idpDownloadAfter(wpSelectDir);
end;
function NextButtonClick(CurPageID: Integer) : boolean;
var ResultCode: Integer;
begin
if CurPageID = IDPForm.Page.ID then
begin
Result := Exec(FileName, '', '', SW_SHOW, ewWaitUntilTerminated, ResultCode);
if not Result then MsgBox('Error Running Downloaded Setup File', mbError, MB_OK);
Result := True;
end
else Result := True;
end;
Any Ideas? Everything else works fine.
Edit: I have a workaround that will show the details section. This might be more appropriate anyways. Still not sure why the Total progress is not updating.
procedure CurPageChanged(CurPageID: Integer);
begin
if CurPageID = IDPForm.Page.ID then
begin
idpShowDetails(True);
IDPForm.TotalProgressBar.Visible := false;
IDPForm.TotalProgressLabel.Visible := false;
IDPForm.TotalDownloaded.Visible := false;
IDPForm.CurrentFileLabel.Caption := 'Downloading...';
IDPForm.DetailsButton.Visible := False;
WizardForm.NextButton.Visible := False;
WizardForm.PageNameLabel.Caption := 'Downloading Setup File';
WizardForm.PageDescriptionLabel.Caption := 'Please wait while the Setup file is being downloaded.';
end;
end;
I indeed get the same behavior. I do not understand why.
But as you have a single file, you can replace the total progress bar with file progress bar:
procedure CurPageChanged(CurPageID: Integer);
begin
if CurPageID = IDPForm.Page.ID then
begin
IDPForm.TotalProgressBar.Visible := False;
IDPForm.FileProgressBar.Top := IDPForm.TotalProgressBar.Top;
IDPForm.FileProgressBar.Visible := True;
IDPForm.DetailsButton.Visible := False;
IDPForm.DetailsVisible := True;
end;
end;

Inno Setup conditional restart based on result of executable call

My Inno Setup script is used to install a driver. It runs my InstallDriver.exe after this file was copied during step ssInstall.
I need to ask the user to restart in some cases according to the value returned by InstallDriver.exe.
This means that I cannot put InstallDriver.exe in section [Run] because there's no way to monitor it's return value.
So I put it in function CurStepChanged() as follows:
procedure CurStepChanged(CurStep: TSetupStep);
var
TmpFileName, ExecStdout, msg: string;
ResultCode: Integer;
begin
if (CurStep=ssPostInstall) then
begin
Log('CurStepChanged(ssPostInstall)');
TmpFileName := ExpandConstant('{app}') + '\InstallDriver.exe';
if Exec(TmpFileName, 'I', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) then .......
However, I can't find a way to make my script restart at this stage.
I thought of using function NeedRestart() to monitor the output of the driver installer, but it is called earlier in the process.
Does it make sense to call the driver installer from within NeedRestart()?
NeedRestart does not look like the right place to install anything. But it would work, as it's fortunately called only once. You will probably want to present a progress somehow though, as the wizard form is almost empty during a call to NeedRestart.
An alternative is to use AfterInstall parameter of the InstallDriver.exe or the driver binary itself (whichever is installed later).
#define InstallDriverName "InstallDriver.exe"
[Files]
Source: "driver.sys"; DestDir: ".."
Source: "{#InstallDriverName}"; DestDir: "{app}"; AfterInstall: InstallDriver
[Code]
var
NeedRestartFlag: Boolean;
const
NeedRestartResultCode = 1;
procedure InstallDriver();
var
InstallDriverPath: string;
ResultCode: Integer;
begin
Log('Installing driver');
InstallDriverPath := ExpandConstant('{app}') + '\{#InstallDriverName}';
if not Exec(InstallDriverPath, 'I', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) then
begin
Log('Failed to execute driver installation');
end
else
begin
Log(Format('Driver installation finished with code %d', [ResultCode]))
if ResultCode = NeedRestartResultCode then
begin
Log('Need to restart to finish driver installation');
NeedRestartFlag := True;
end;
end;
end;
function NeedRestart(): Boolean;
begin
if NeedRestartFlag then
begin
Log('Need restart');
Result := True;
end
else
begin
Log('Do not need restart');
Result := False;
end;
end;

Inno Setup: Disable components page on upgrade

Is there a way to disable the Components Page for Upgrades? I would like to enable upgrades of my software but I don't want to allow the users to change the selection of components in case of an upgrade.
Instead the installer you upgrade all existing components from the first installation.
I am worried that it the user selects less components during the upgrade those missing components will stay installed as the old version and you get a mess.
I added the following to my script:
[Setup]
DisableDirPage=auto
DisableProgramGroupPage=auto
DirExistsWarning=auto
I just need a way to disable the components page and use the selection of the previous install (full install) for the upgrade. Is that possible?
I have found a related directive:
[Setup]
UsePreviousTasks=true
UsePreviousTasks is reading the existing section out of the registry which is good. Now I need to find a way to hide the selection window.
Thanks,
Wolfgang
To hide a page from user use the ShouldSkipPage event method. If you return True in this method, the page won't be shown to user. If False, the page will be displayed as usually. Here 's an example of how to check if the installation is an upgrade and if so, skip the Select Components wizard page:
[Setup]
AppId=B75E4823-1BC9-4AC6-A645-94027A16F5A5
AppName=My Program
AppVersion=1.5
DefaultDirName={pf}\My Program
; here is the place for your [Components] section and the rest of your script
[Code]
const
UninstallKey = 'Software\Microsoft\Windows\CurrentVersion\Uninstall\{#SetupSetting("AppId")}_is1';
function IsUpgrade: Boolean;
var
Value: string;
begin
Result := (RegQueryStringValue(HKLM, UninstallKey, 'UninstallString', Value) or
RegQueryStringValue(HKCU, UninstallKey, 'UninstallString', Value)) and (Value <> '');
end;
function ShouldSkipPage(PageID: Integer): Boolean;
begin
Result := (PageID = wpSelectComponents) and IsUpgrade;
end;
Another option you mentioned might be to disable all the controls of the page. The next script shows as the previous one how to check if the installation is an upgrade and if so, disables all the controls on the Select Components wizard page:
[Setup]
AppId=B75E4823-1BC9-4AC6-A645-94027A16F5A5
AppName=My Program
AppVersion=1.5
DefaultDirName={pf}\My Program
; here is the place for your [Components] section and the rest of your script
[Code]
const
UninstallKey = 'Software\Microsoft\Windows\CurrentVersion\Uninstall\{#SetupSetting("AppId")}_is1';
function IsUpgrade: Boolean;
var
Value: string;
begin
Result := (RegQueryStringValue(HKLM, UninstallKey, 'UninstallString', Value) or
RegQueryStringValue(HKCU, UninstallKey, 'UninstallString', Value)) and (Value <> '');
end;
procedure DisablePageControls(Page: TNewNotebookPage);
var
I: Integer;
begin
Page.Enabled := False;
for I := 0 to Page.ControlCount - 1 do
Page.Controls[I].Enabled := False;
end;
procedure InitializeWizard;
begin
if IsUpgrade then
DisablePageControls(WizardForm.SelectComponentsPage);
end;
The IsUpgrade function mentioned in TLama's answer has a bug. If AppId starts with a "{" which must be doubled, this isn't resolved and they registry key will not be found. Here's a corrected function that works for me:
function IsUpgrade: Boolean;
var
Value: string;
UninstallKey: string;
begin
UninstallKey := 'Software\Microsoft\Windows\CurrentVersion\Uninstall\' +
ExpandConstant('{#SetupSetting("AppId")}') + '_is1';
Result := (RegQueryStringValue(HKLM, UninstallKey, 'UninstallString', Value) or
RegQueryStringValue(HKCU, UninstallKey, 'UninstallString', Value)) and (Value <> '');
end;
Leave the separate const away for this function, it won't work with that extra function call.
Apart from that, 64-bit systems don't seem to cause any issues. If InnoSetup runs in 32-bit mode, the registry virtualisation is in effect and redirects you to the correct key already.
Something like that:
if CurPageID=wpSelectComponents then
begin
if ExtraOptionAvailable() then
begin
Wizardform.ComponentsList.Checked[6] := true;
Wizardform.ComponentsList.ItemEnabled[6] := true;
end else begin
Wizardform.ComponentsList.Checked[6] := false;
Wizardform.ComponentsList.ItemEnabled[6] := false;
end;
end;

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