Add tool calling support to chat template

chat_template.jinja

@@ -1,4 +1,26 @@
-{{bos_token}}{% for message in messages %}{{'<|im_start|>' + message['role'] + '
-' + message['content'] + '<|im_end|>' + '
-'}}{% endfor %}{% if add_generation_prompt %}{{ '<|im_start|>assistant
-' }}{% endif %}
+{{- bos_token -}}
+{%- set system_prompt = "" -%}
+{%- if messages[0]["role"] == "system" -%}
+	{%- set system_prompt = messages[0]["content"] -%}
+	{%- set messages = messages[1:] -%}
+{%- endif -%}
+{%- if tools -%}
+	{%- set system_prompt = system_prompt + ("\n" if system_prompt else "") + "List of tools: <|tool_list_start|>" + tools | tojson + "<|tool_list_end|>" -%}
+{%- endif -%}
+{%- if system_prompt -%}
+	{{- "<|im_start|>system\n" + system_prompt + "<|im_end|>\n" -}}
+{%- endif -%}
+{%- for message in messages -%}
+	{{- "<|im_start|>" + message["role"] + "\n" -}}
+	{%- set content = message["content"] -%}
+	{%- if content is not string -%}
+		{%- set content = content | tojson -%}
+	{%- endif -%}
+	{%- if message["role"] == "tool" -%}
+		{%- set content = "<|tool_response_start|>" + content + "<|tool_response_end|>" -%}
+	{%- endif -%}
+	{{- content + "<|im_end|>\n" -}}
+{%- endfor -%}
+{%- if add_generation_prompt -%}
+	{{- "<|im_start|>assistant\n" -}}
+{%- endif -%}