From 5d50a660bc6ac480b1f92db47bcb3974104bf4d1 Mon Sep 17 00:00:00 2001
From: Andrey Kleshchev <andreykproductengine@lindenlab.com>
Date: Wed, 27 Aug 2025 22:03:32 +0300
Subject: #4588 Unable to direct silent installation

---
 .../installers/windows/installer_template.nsi      | 86 +++++++++++++++++++++-
 1 file changed, 85 insertions(+), 1 deletion(-)

(limited to 'indra/newview/installers')

diff --git a/indra/newview/installers/windows/installer_template.nsi b/indra/newview/installers/windows/installer_template.nsi
index 77f24ac6a6..0e36698018 100644
--- a/indra/newview/installers/windows/installer_template.nsi
+++ b/indra/newview/installers/windows/installer_template.nsi
@@ -163,6 +163,74 @@ Var DO_UNINSTALL_V2     # If non-null, path to a previous Viewer 2 installation
 !include 'LogicLib.nsh'     # for value comparison
 !include "x64.nsh"			# for 64bit detection
 
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;; Substring function
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+!define StrStr "!insertmacro StrStr"
+ 
+!macro StrStr ResultVar String SubString
+  Push `${String}`
+  Push `${SubString}`
+  Call StrStr
+  Pop `${ResultVar}`
+!macroend
+ 
+Function StrStr
+
+# After this point:
+# ------------------------------------------
+# $R0 = SubString (input)
+# $R1 = String (input)
+# $R2 = SubStringLen (temp)
+# $R3 = StrLen (temp)
+# $R4 = StartCharPos (temp)
+# $R5 = TempStr (temp)
+# function from nsis.sourceforge.io/StrStr
+ 
+  ;Get input from user
+  Exch $R0
+  Exch
+  Exch $R1
+  Push $R2
+  Push $R3
+  Push $R4
+  Push $R5
+ 
+  ;Get "String" and "SubString" length
+  StrLen $R2 $R0
+  StrLen $R3 $R1
+  ;Start "StartCharPos" counter
+  StrCpy $R4 0
+ 
+  ;Loop until "SubString" is found or "String" reaches its end
+  ${Do}
+    ;Remove everything before and after the searched part ("TempStr")
+    StrCpy $R5 $R1 $R2 $R4
+ 
+    ;Compare "TempStr" with "SubString"
+    ${IfThen} $R5 == $R0 ${|} ${ExitDo} ${|}
+    ;If not "SubString", this could be "String"'s end
+    ${IfThen} $R4 >= $R3 ${|} ${ExitDo} ${|}
+    ;If not, continue the loop
+    IntOp $R4 $R4 + 1
+  ${Loop}
+ 
+# After this point:
+# ------------------------------------------
+# $R0 = ResultVar (output)
+ 
+  ;Remove part before "SubString" on "String" (if there has one)
+  StrCpy $R0 $R1 `` $R4
+ 
+  ;Return output to user
+  Pop $R5
+  Pop $R4
+  Pop $R3
+  Pop $R2
+  Pop $R1
+  Exch $R0
+FunctionEnd
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;; Pre-directory page callback
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -190,15 +258,31 @@ Function .onInit
 # However, SL-10506 complains about the resulting behavior, so the logic below
 # is adapted from before we introduced MultiUser.nsh.
 
+# Check if user specified /D= on the command line
+System::Call 'kernel32::GetCommandLine()t .r0'
+Push $0
+Push " /D="
+Call StrStr
+Pop $1
+${If} $1 != ""
+    # /D= was specified, extract the path
+    # spaces are allowed in path after /D=, it's expected to be the last parameter
+    StrLen $2 $1 
+    StrCpy $INSTDIR $1 $2 4	# Skip over " /D="
+    Goto after_instdir
+${EndIf}
+
 # if $0 is empty, this is the first time for this viewer name
 ReadRegStr $0 SHELL_CONTEXT "${INSTNAME_KEY}" ""
 
 # viewer with this name was installed before
 ${If} $0 != ""
-	# use the value we got from registry as install location
+    # use the value we got from registry as install location
     StrCpy $INSTDIR $0
 ${EndIf}
 
+after_instdir:
+
 Call CheckCPUFlags							# Make sure we have SSE2 support
 Call CheckWindowsVersion					# Don't install On unsupported systems
     Push $0
-- 
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