build: add popup msgs about CreateSymLinkPrivilege

Signed-off-by: Ruslan Kuprieiev <[email protected]>

innosetup/addsymlink.iss

@@ -1,9 +1,14 @@
 procedure AddSymLink();
 var
-	ErrorCode: Integer;
-	SRCdir: String;
+    ErrorCode: Integer;
+    SRCdir: String;
 begin
-	SRCdir := ExpandConstant('{app}');
-	if isUninstaller() = false then
-		ShellExec('', 'powershell.exe', '-noninteractive -windowstyle hidden -executionpolicy bypass -File "' + SRCdir + '\addSymLinkPermissions.ps1" -mytype ' + SymLinkType, '', SW_HIDE, ewWaitUntilTerminated, ErrorCode);
+    SRCdir := ExpandConstant('{app}');
+    if isUninstaller() = false then begin
+        if not ShellExec('', 'powershell.exe', '-noninteractive -windowstyle hidden -executionpolicy bypass -File "' + SRCdir + '\addSymLinkPermissions.ps1" -mytype ' + SymLinkType, '', SW_HIDE, ewWaitUntilTerminated, ErrorCode) then begin
+            MsgBox('Failed to automatically grant SeCreateSymbolicLinkPrivilege. Please download Polsedit(www.southsoftware.com/polsedit.zip). Launch polseditx32.exe or polseeditx64.exe (depending on your Windows version), navigate to "Security Settings" -> "User Rights Assignment", add the account(s) to the list named "Create symbolic links", logoff and login back into your account. More info at https://github.com/git-for-windows/git/wiki/Symbolic-Links.', mbInformation, MB_OK);
+        end else begin
+            MsgBox('Automatically added SeCreateSymbolicLinkPrivilege. Please logoff and login back into your account in order for the change to take effect.', mbInformation, MB_OK);
+        end;
+    end;
 end;