Merge commit 'f1e3eb4249db68d97be352c0adf16eef7ae53795' into concedo_experimental

# Conflicts:
#	.github/workflows/build.yml
#	README.md
#	docs/backend/SYCL.md
#	examples/llava/clip.cpp
#	ggml/src/ggml-sycl/CMakeLists.txt
#	ggml/src/ggml-vulkan/cmake/host-toolchain.cmake.in

common/arg.cpp

@@ -19,6 +19,7 @@
 #include <algorithm>
 #include <climits>
 #include <cstdarg>
+#include <filesystem>
 #include <fstream>
 #include <regex>
 #include <set>
@@ -657,9 +658,13 @@ static void common_params_handle_model(
                 }
             }
 
-            // TODO: allow custom host
-            model.url = "https://huggingface.co/" + model.hf_repo + "/resolve/main/" + model.hf_file;
-
+            std::string hf_endpoint = "https://huggingface.co/";
+            const char * hf_endpoint_env = getenv("HF_ENDPOINT");
+            if (hf_endpoint_env) {
+                hf_endpoint = hf_endpoint_env;
+                if (hf_endpoint.back() != '/') hf_endpoint += '/';
+            }
+            model.url = hf_endpoint + model.hf_repo + "/resolve/main/" + model.hf_file;
             // make sure model path is present (for caching purposes)
             if (model.path.empty()) {
                 // this is to avoid different repo having same file name, or same file name in different subdirs