source: mainline/uspace/app/pcc/os/win32/pcc.iss@ b705ecc

[Setup]
AppName={#AppName}
AppID={#AppNameLower}
AppVerName={#AppName} {#AppVersion}
AppPublisher=PCC Project
AppPublisherURL=http://pcc.ludd.ltu.se/
DefaultDirName={pf}\{#AppNameLower}
DefaultGroupName={#AppName}
Compression=lzma/ultra
InternalCompressLevel=ultra
SolidCompression=yes
OutputDir=.
OutputBaseFilename={#AppNameLower}-{#AppVersion}-win32
ChangesEnvironment=yes

[Files]
Source: "c:\Program Files\{#AppNameLower}\*.*"; DestDir: {app}; Flags: recursesubdirs

[Icons]
Name: {group}\{cm:UninstallProgram, {#AppName}}; FileName: {uninstallexe}

[Registry]
Root: HKLM; Subkey: System\CurrentControlSet\Control\Session Manager\Environment; ValueName: {#AppName}DIR; ValueType: string; ValueData: {app}; Flags: deletevalue

[Tasks]
Name: modifypath; Description: Add application directory to your system path; Flags: unchecked

[Code]

// Jared Breland <jbreland@legroom.net>
// http://www.legroom.net/software/modpath

procedure ModPath(BinDir : String);
var
        oldpath : String;
        newpath : String;
        pathArr : TArrayOfString;
        i : Integer;
begin
        RegQueryStringValue(HKEY_LOCAL_MACHINE, 'System\CurrentControlSet\Control\Session Manager\Environment', 'Path', oldpath);
        oldpath := oldpath + ';';
        i := 0;
        while (Pos(';', oldpath) > 0) do begin
                SetArrayLength(pathArr, i+1);
                pathArr[i] := Copy(oldpath, 0, Pos(';', oldpath) - 1);
                oldpath := Copy(oldpath, Pos(';', oldpath) + 1, Length(oldpath));
                i := i + 1;

                if BinDir = pathArr[i-1] then
                        if IsUninstaller() = true then begin
                                continue;
                        end else begin
                                abort;
                        end;

                if i = 1 then begin
                        newpath := pathArr[i-1];
                end else begin
                        newpath := newpath + ';' + pathArr[i-1];
                end;
        end;

        if IsUninstaller() = false then
                newpath := newpath + ';' + BinDir;

        RegWriteStringValue(HKEY_LOCAL_MACHINE, 'System\CurrentControlSet\Control\Session Manager\Environment', 'Path', newpath);
end;
                
procedure CurStepChanged(CurStep : TSetupStep);
var
        appdir : String;
begin
        if CurStep = ssPostInstall then
                if IsTaskSelected('modifypath') then begin
                        appdir := ExpandConstant('{app}');
                        ModPath(appdir + '\bin');
                        SaveStringToFile(appdir + '\uninsTasks.txt', WizardSelectedTasks(False), False);
                end;
end;

procedure CurUninstallStepChanged(CurUninstallStep : TUninstallStep);
var
        appdir : String;
        selectedTasks : String;
begin
        if CurUninstallStep = usUninstall then begin
                appdir := ExpandConstant('{app}');
                if LoadStringFromFile(appdir + '\uninsTasks.txt', selectedTasks) then
                        if (Pos('modifypath', selectedTasks) > 0) then
                                ModPath(appdir + '\bin');
                        DeleteFile(appdir + '\uninsTasks.txt')
        end;
end;