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// ----------------------------------------------------------------------------
//
// Inno Setup Ver: 5.4.2
// Script Version: 1.4.2
// Author: Jared Breland <jbreland@legroom.net>
// Homepage: https://www.legroom.net/software
// License: GNU Lesser General Public License (LGPL), version 3
// https://www.gnu.org/licenses/lgpl.html
//
// Script Function:
// Allow modification of environmental path directly from Inno Setup installers
//
// Instructions:
// Copy modpath.iss to the same directory as your setup script
//
// Add this statement to your [Setup] section
// ChangesEnvironment=true
//
// Add this statement to your [Tasks] section
// You can change the Description or Flags
// You can change the Name, but it must match the ModPathName setting below
// Name: modifypath; Description: &Add application directory to your environmental path; Flags: unchecked
//
// Add the following to the end of your [Code] section
// ModPathName defines the name of the task defined above
// ModPathType defines whether the 'user' or 'system' path will be modified;
// this will default to user if anything other than system is set
// setArrayLength must specify the total number of dirs to be added
// Result[0] contains first directory, Result[1] contains second, etc.
// const
// ModPathName = 'modifypath';
// ModPathType = 'user';
//
// function ModPathDir(): TArrayOfString;
// begin
// setArrayLength(Result, 1);
// Result[0] := ExpandConstant('{app}');
// end;
// #include "modpath.iss"
// ----------------------------------------------------------------------------
procedure ModPath();
var
oldpath: String;
newpath: String;
updatepath: Boolean;
pathArr: TArrayOfString;
aExecFile: String;
aExecArr: TArrayOfString;
i, d: Integer;
pathdir: TArrayOfString;
regroot: Integer;
regpath: String;
begin
// Get constants from main script and adjust behavior accordingly
// ModPathType MUST be 'system' or 'user'; force 'user' if invalid
if ModPathType = 'system' then begin
regroot := HKEY_LOCAL_MACHINE;
regpath := 'SYSTEM\CurrentControlSet\Control\Session Manager\Environment';
end else begin
regroot := HKEY_CURRENT_USER;
regpath := 'Environment';
end;
// Get array of new directories and act on each individually
pathdir := ModPathDir();
for d := 0 to GetArrayLength(pathdir)-1 do begin
updatepath := true;
// Modify WinNT path
if UsingWinNT() = true then begin
// Get current path, split into an array
RegQueryStringValue(regroot, regpath, '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;
// Check if current directory matches app dir
if pathdir[d] = pathArr[i-1] then begin
// if uninstalling, remove dir from path
if IsUninstaller() = true then begin
continue;
// if installing, flag that dir already exists in path
end else begin
updatepath := false;
end;
end;
// Add current directory to new path
if i = 1 then begin
newpath := pathArr[i-1];
end else begin
newpath := newpath + ';' + pathArr[i-1];
end;
end;
// Append app dir to path if not already included
if (IsUninstaller() = false) AND (updatepath = true) then
newpath := newpath + ';' + pathdir[d];
// Write new path
RegWriteStringValue(regroot, regpath, 'Path', newpath);
// Modify Win9x path
end else begin
// Convert to shortened dirname
pathdir[d] := GetShortName(pathdir[d]);
// If autoexec.bat exists, check if app dir already exists in path
aExecFile := 'C:\AUTOEXEC.BAT';
if FileExists(aExecFile) then begin
LoadStringsFromFile(aExecFile, aExecArr);
for i := 0 to GetArrayLength(aExecArr)-1 do begin
if IsUninstaller() = false then begin
// If app dir already exists while installing, skip add
if (Pos(pathdir[d], aExecArr[i]) > 0) then
updatepath := false;
break;
end else begin
// If app dir exists and = what we originally set, then delete at uninstall
if aExecArr[i] = 'SET PATH=%PATH%;' + pathdir[d] then
aExecArr[i] := '';
end;
end;
end;
// If app dir not found, or autoexec.bat didn't exist, then (create and) append to current path
if (IsUninstaller() = false) AND (updatepath = true) then begin
SaveStringToFile(aExecFile, #13#10 + 'SET PATH=%PATH%;' + pathdir[d], True);
// If uninstalling, write the full autoexec out
end else begin
SaveStringsToFile(aExecFile, aExecArr, False);
end;
end;
end;
end;
// Split a string into an array using passed delimiter.
procedure MPExplode(var Dest: TArrayOfString; Text: String; Separator: String);
var
i: Integer;
begin
i := 0;
repeat
SetArrayLength(Dest, i+1);
if Pos(Separator,Text) > 0 then begin
Dest[i] := Copy(Text, 1, Pos(Separator, Text)-1);
Text := Copy(Text, Pos(Separator,Text) + Length(Separator), Length(Text));
i := i + 1;
end else begin
Dest[i] := Text;
Text := '';
end;
until Length(Text)=0;
end;
procedure CurStepChanged(CurStep: TSetupStep);
var
taskname: String;
begin
taskname := ModPathName;
if CurStep = ssPostInstall then
if IsTaskSelected(taskname) then
ModPath();
end;
procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
var
aSelectedTasks: TArrayOfString;
i: Integer;
taskname: String;
regpath: String;
regstring: String;
appid: String;
begin
// only run during actual uninstall
if CurUninstallStep = usUninstall then begin
// get list of selected tasks saved in registry at install time
appid := '{#emit SetupSetting("AppId")}';
if appid = '' then appid := '{#emit SetupSetting("AppName")}';
regpath := ExpandConstant('Software\Microsoft\Windows\CurrentVersion\Uninstall\'+appid+'_is1');
RegQueryStringValue(HKLM, regpath, 'Inno Setup: Selected Tasks', regstring);
if regstring = '' then RegQueryStringValue(HKCU, regpath, 'Inno Setup: Selected Tasks', regstring);
// check each task; if matches modpath taskname, trigger patch removal
if regstring <> '' then begin
taskname := ModPathName;
MPExplode(aSelectedTasks, regstring, ',');
if GetArrayLength(aSelectedTasks) > 0 then begin
for i := 0 to GetArrayLength(aSelectedTasks)-1 do begin
if comparetext(aSelectedTasks[i], taskname) = 0 then
ModPath();
end;
end;
end;
end;
end;
function NeedRestart(): Boolean;
var
taskname: String;
begin
taskname := ModPathName;
if IsTaskSelected(taskname) and not UsingWinNT() then begin
Result := True;
end else begin
Result := False;
end;
end;
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