vbatts/llama.cpp
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Add --jinja and --chat-template-file flags

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This commit is contained in:
ochafik 2024-12-30 03:40:34 +00:00
parent abd274a48f
commit e5113e8d74
12 changed files with 289 additions and 50 deletions
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40
examples/server/utils.hpp
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@ -16,6 +16,8 @@
// Change JSON_ASSERT from assert() to GGML_ASSERT:
#define JSON_ASSERT GGML_ASSERT
#include "json.hpp"
#include "minja.hpp"
#include "chat-template.hpp"
#include <random>
#include <sstream>
@ -382,19 +384,6 @@ inline std::string format_chat(const struct llama_model * model, const std::stri
return formatted_chat;
}
static std::string llama_get_chat_template(const struct llama_model * model) {
std::string template_key = "tokenizer.chat_template";
// call with NULL buffer to get the total size of the string
int32_t res = llama_model_meta_val_str(model, template_key.c_str(), NULL, 0);
if (res < 2) {
return "";
} else {
std::vector<char> model_template(res + 1, 0);
llama_model_meta_val_str(model, template_key.c_str(), model_template.data(), model_template.size());
return std::string(model_template.data(), model_template.size() - 1);
}
}
//
// base64 utils (TODO: move to common in the future)
//
@ -552,11 +541,21 @@ static bool server_sent_event(httplib::DataSink & sink, const char * event, cons
static json oaicompat_completion_params_parse(
const struct llama_model * model,
const json & body, /* openai api json semantics */
const std::string & chat_template) {
const minja::chat_template & tmpl,
bool use_jinja)
{
json llama_params;
// Apply chat template to the list of messages
llama_params["prompt"] = format_chat(model, chat_template, body.at("messages"));
auto tools = json_value(body, "tools", json());
auto has_tools = tools.is_array() && !tools.empty();
if (has_tools) {
if (use_jinja) {
LOG_WRN("tools param is not fully supported yet\n");
} else {
throw std::runtime_error("tools param requires --jinja flag");
}
}
// Handle "stop" field
if (body.contains("stop") && body.at("stop").is_string()) {
@ -579,6 +578,13 @@ static json oaicompat_completion_params_parse(
}
}
// Apply chat template to the list of messages
if (use_jinja) {
llama_params["prompt"] = tmpl.apply(body.at("messages"), tools, /* add_generation_prompt= */ true);
} else {
llama_params["prompt"] = format_chat(model, tmpl.source(), body.at("messages"));
}
// Handle "n" field
int n_choices = json_value(body, "n", 1);
if (n_choices != 1) {
@ -594,7 +600,7 @@ static json oaicompat_completion_params_parse(
}
// Params supported by OAI but unsupported by llama.cpp
static const std::vector<std::string> unsupported_params { "tools", "tool_choice" };
static const std::vector<std::string> unsupported_params { "tool_choice" };
for (const auto & param : unsupported_params) {
if (body.contains(param)) {
throw std::runtime_error("Unsupported param: " + param);