From 1fbefa0b89eaafaa2345de989ebf3c410a34869b Mon Sep 17 00:00:00 2001
From: Giulio Eulisse <10544+ktf@users.noreply.github.com>
Date: Tue, 8 Sep 2026 08:54:15 +0200
Subject: [PATCH] Remove hardcoded CCDB path

---
 DataFormats/Parameters/src/GRPTool.cxx | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/DataFormats/Parameters/src/GRPTool.cxx b/DataFormats/Parameters/src/GRPTool.cxx
index e7561e6fc1ef6..49d9a68decc58 100644
--- a/DataFormats/Parameters/src/GRPTool.cxx
+++ b/DataFormats/Parameters/src/GRPTool.cxx
@@ -10,6 +10,7 @@
 // or submit itself to any jurisdiction.
 
 #include <boost/program_options.hpp>
+#include <cstdlib>
 #include <string>
 #include "DataFormatsParameters/GRPECSObject.h"
 #include "DataFormatsParameters/GRPMagField.h"
@@ -43,6 +44,19 @@ enum class GRPCommand {
   kPRINTMAG
 };
 
+// CCDB host, overridable via ALICEO2_CCDB_HOST as the CCDB test suites do.
+// Without it this tool always contacts alice-ccdb.cern.ch, which CcdbApi flags
+// as needing an alien token -- fatal in CI, where CCDB is reached through a
+// local proxy instead.
+namespace
+{
+std::string defaultCCDBHost()
+{
+  const char* host = std::getenv("ALICEO2_CCDB_HOST");
+  return (host && *host) ? std::string(host) : std::string("http://alice-ccdb.cern.ch");
+}
+} // namespace
+
 // options struct filled from command line
 struct Options {
   std::vector<std::string> readout;
@@ -60,7 +74,7 @@ struct Options {
   bool print = false;         // whether to print outcome of GRP operation
   bool lhciffromccdb = false; // whether only to take GRPLHCIF from CCDB
   std::string publishto = "";
-  std::string ccdbhost = "http://alice-ccdb.cern.ch";
+  std::string ccdbhost = defaultCCDBHost();
   bool isRun5 = false; // whether or not this is supposed to be a Run5 detector configuration
   std::string vertex = "ccdb";
   std::string configKeyValues = "";