chat : include kwargs in template example (ggml-org#15309)

Author: slaren

common/chat.cpp

@@ -473,11 +473,12 @@ std::string common_chat_format_single(
     return ss.str();
 }
 
-std::string common_chat_format_example(const struct common_chat_templates * tmpls, bool use_jinja) {
+std::string common_chat_format_example(const struct common_chat_templates * tmpls, bool use_jinja, const std::map<std::string, std::string> & chat_template_kwargs) {
     common_chat_templates_inputs inputs;
     inputs.use_jinja = use_jinja;
     inputs.add_bos = tmpls->add_bos;
     inputs.add_eos = tmpls->add_eos;
+    inputs.chat_template_kwargs = chat_template_kwargs;
     auto add_simple_msg = [&](auto role, auto content) {
         common_chat_msg msg;
         msg.role = role;

common/chat.h

@@ -187,7 +187,8 @@ std::string common_chat_format_single(
 // Returns an example of formatted chat
 std::string common_chat_format_example(
     const struct common_chat_templates * tmpls,
-    bool use_jinja);
+    bool use_jinja,
+    const std::map<std::string, std::string> & chat_template_kwargs);
 
 const char*               common_chat_format_name(common_chat_format format);
 const char*               common_reasoning_format_name(common_reasoning_format format);

tools/main/main.cpp

@@ -220,7 +220,7 @@ int main(int argc, char ** argv) {
                 LOG_WRN("*** User-specified prompt will pre-start conversation, did you mean to set --system-prompt (-sys) instead?\n");
             }
 
-            LOG_INF("%s: chat template example:\n%s\n", __func__, common_chat_format_example(chat_templates.get(), params.use_jinja).c_str());
+            LOG_INF("%s: chat template example:\n%s\n", __func__, common_chat_format_example(chat_templates.get(), params.use_jinja, params.default_template_kwargs).c_str());
         } else {
             LOG_INF("%s: in-suffix/prefix is specified, chat template will be disabled\n", __func__);
         }

tools/mtmd/mtmd-cli.cpp

@@ -108,7 +108,7 @@ struct mtmd_cli_context {
         }
 
         tmpls = common_chat_templates_init(model, params.chat_template);
-        LOG_INF("%s: chat template example:\n%s\n", __func__, common_chat_format_example(tmpls.get(), params.use_jinja).c_str());
+        LOG_INF("%s: chat template example:\n%s\n", __func__, common_chat_format_example(tmpls.get(), params.use_jinja, params.default_template_kwargs).c_str());
 
         init_vision_context(params);
 

tools/server/server.cpp

@@ -2053,7 +2053,7 @@ struct server_context {
 
         chat_templates = common_chat_templates_init(model, params_base.chat_template);
         try {
-            common_chat_format_example(chat_templates.get(), params.use_jinja);
+            common_chat_format_example(chat_templates.get(), params.use_jinja, params.default_template_kwargs);
         } catch (const std::exception & e) {
             SRV_WRN("%s: Chat template parsing error: %s\n", __func__, e.what());
             SRV_WRN("%s: The chat template that comes with this model is not yet supported, falling back to chatml. This may cause the model to output suboptimal responses\n", __func__);
@@ -5075,7 +5075,7 @@ int main(int argc, char ** argv) {
     // print sample chat example to make it clear which template is used
     LOG_INF("%s: chat template, chat_template: %s, example_format: '%s'\n", __func__,
         common_chat_templates_source(ctx_server.chat_templates.get()),
-        common_chat_format_example(ctx_server.chat_templates.get(), ctx_server.params_base.use_jinja).c_str());
+        common_chat_format_example(ctx_server.chat_templates.get(), ctx_server.params_base.use_jinja, ctx_server.params_base.default_template_kwargs).c_str());
 
     ctx_server.queue_tasks.on_new_task([&ctx_server](server_task && task) {
         ctx_server.process_single_task(std::move(task));