From ca679e98deda2739aee6963d3e7029430d71cada Mon Sep 17 00:00:00 2001
From: Joerg Bornemann <joerg.bornemann@qt.io>
Date: Mon, 15 Dec 2025 13:21:56 +0100
Subject: [PATCH] init-repository: Fix passing no --alternates option

Commit d6918d7ac516ff6cb72a99197a58cc182375916a broke init-repository if
you did not pass an --alternates option.

Pick-to: 6.8
Task-number: QTBUG-142712
Fixes: QTBUG-142744
Change-Id: Ia727b420a34a46e52f0f05e549aabe2c975c6d7e
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
(cherry picked from commit 6bd3b23b6c48e6210f3af3a1808529ad97429a29)
(cherry picked from commit f1d54f955c074aad96de4aa6d4ac994adc5facf1)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 cmake/QtIRCommandLineHelpers.cmake | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/cmake/QtIRCommandLineHelpers.cmake b/cmake/QtIRCommandLineHelpers.cmake
index b932fcdf..8856e980 100644
--- a/cmake/QtIRCommandLineHelpers.cmake
+++ b/cmake/QtIRCommandLineHelpers.cmake
@@ -427,11 +427,13 @@ endfunction()
 # Convert to absolute path if necessary.
 function(qt_ir_get_option_as_existing_absolute_path name value)
     qt_ir_get_option_value("${name}" path)
-    if(NOT EXISTS "${abspath}")
-        qt_ir_add_error("The path '${path}' passed with -${name} does not exist.")
-    endif()
-    if(NOT IS_ABSOLUTE "${path}")
-        get_filename_component(path "${path}" ABSOLUTE)
+    if(NOT "${path}" STREQUAL "")
+        if(NOT EXISTS "${path}")
+            qt_ir_add_error("The path '${path}' passed with -${name} does not exist.")
+        endif()
+        if(NOT IS_ABSOLUTE "${path}")
+            get_filename_component(path "${path}" ABSOLUTE)
+        endif()
     endif()
     set("${value}" "${path}" PARENT_SCOPE)
 endfunction()