Commit 5c5911ec authored by Cédric Moreau's avatar Cédric Moreau
Browse files

Fix #654 Uninstall before installing a new version

parent 56576bb4
......@@ -42,10 +42,6 @@ Name: "french"; MessagesFile: "compiler:Languages\French.isl"
[Tasks]
Name: "desktopicon"; Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked
[InstallDelete]
Type: filesandordirs; Name: "{app}\nw\";
Type: filesandordirs; Name: "{app}\sources\";
[Files]
Source: "{#MyAppSrc}\nw\*"; DestDir: "{app}\nw\"; Flags: ignoreversion recursesubdirs
Source: "{#MyAppSrc}\sources\*"; DestDir: "{app}\sources\"; Flags: ignoreversion recursesubdirs
......@@ -64,3 +60,68 @@ Filename: "{app}\nw\{#MyAppExeName}"; Description: "{cm:LaunchProgram,{#StringCh
; (To generate a new GUID, click Tools | Generate GUID inside the IDE.)
AppId={{E01B0960-74D2-8ACD-734E-8B3CB033B07F}
LicenseFile="{#MyAppSrc}\sources\LICENSE"
[Code]
//////////
// Code taken from http://stackoverflow.com/a/2099805
//////////
/////////////////////////////////////////////////////////////////////
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;
\ No newline at end of file
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