From cb5bd6319449e4edd1c8f308cd5ab09e47a07731 Mon Sep 17 00:00:00 2001
From: Tobias Gloth <tobias.gloth@3dsystems.com>
Date: Thu, 4 Jun 2026 01:28:51 -0400
Subject: [PATCH] add "logfile" option to log diagnostics to file using boost
 (#13931)

add some logging options

Co-authored-by: SoftFever <softfeverever@gmail.com>
---
 src/OrcaSlicer.cpp            | 4 ++++
 src/libslic3r/PrintConfig.cpp | 7 +++++++
 src/libslic3r/Utils.hpp       | 1 +
 src/libslic3r/utils.cpp       | 5 +++++
 4 files changed, 17 insertions(+)

diff --git a/src/OrcaSlicer.cpp b/src/OrcaSlicer.cpp
index 2e445cadfd..f30550a4e3 100644
--- a/src/OrcaSlicer.cpp
+++ b/src/OrcaSlicer.cpp
@@ -1357,6 +1357,10 @@ int CLI::run(int argc, char **argv)
     else {
         set_logging_level(2);
     }
+    const ConfigOptionString* opt_logfile = m_config.opt<ConfigOptionString>("logfile");
+    if (opt_logfile) {
+        set_logging_file(opt_logfile->value);
+    }
 
     global_begin_time = (long long)Slic3r::Utils::get_current_time_utc();
     BOOST_LOG_TRIVIAL(warning) << boost::format("cli mode, Current OrcaSlicer Version %1%")%SoftFever_VERSION;
diff --git a/src/libslic3r/PrintConfig.cpp b/src/libslic3r/PrintConfig.cpp
index 8da03fd969..2113b78467 100644
--- a/src/libslic3r/PrintConfig.cpp
+++ b/src/libslic3r/PrintConfig.cpp
@@ -9750,6 +9750,7 @@ void DynamicPrintConfig::update_values_to_printer_extruders_for_multiple_filamen
                 BOOST_LOG_TRIVIAL(warning) << __FUNCTION__ << boost::format(", Line %1%: can not find opt define for %2%")%__LINE__%key;
                 continue;
             }
+
             switch (optdef->type) {
                 case coStrings:
                 {
@@ -10846,6 +10847,12 @@ CLIMiscConfigDef::CLIMiscConfigDef()
     def->cli_params = "level";
     def->set_default_value(new ConfigOptionInt(1));
 
+    def = this->add("logfile", coInt);
+    def->label = L("Log file");
+    def->tooltip = L("Redirects debug logging to file.\n");
+    def->cli_params = "file";
+    def->set_default_value(new ConfigOptionString());
+
     def = this->add("enable_timelapse", coBool);
     def->label = L("Enable timelapse for print");
     def->tooltip = L("If enabled, this slicing will be considered using timelapse.");
diff --git a/src/libslic3r/Utils.hpp b/src/libslic3r/Utils.hpp
index 95ad6ea9d2..51cb2e5787 100644
--- a/src/libslic3r/Utils.hpp
+++ b/src/libslic3r/Utils.hpp
@@ -79,6 +79,7 @@ namespace boost { namespace filesystem { class directory_entry; }}
 namespace Slic3r {
 
 extern void set_logging_level(unsigned int level);
+extern void set_logging_file(const std::string &file);
 extern unsigned int level_string_to_boost(std::string level);
 extern std::string  get_string_logging_level(unsigned level);
 extern unsigned get_logging_level();
diff --git a/src/libslic3r/utils.cpp b/src/libslic3r/utils.cpp
index 2cccfbe02b..675286d3a1 100644
--- a/src/libslic3r/utils.cpp
+++ b/src/libslic3r/utils.cpp
@@ -129,6 +129,11 @@ void set_logging_level(unsigned int level)
     );
 }
 
+void set_logging_file(const std::string &file)
+{
+	boost::log::add_file_log(file);
+}
+
 unsigned int level_string_to_boost(std::string level)
 {
     std::map<std::string, int> Control_Param;