Opt class for positional argument handling (#10508)

Added support for positional arguments `model` and `prompt`. Added
functionality to download via strings like:

  llama-run llama3
  llama-run ollama://granite-code
  llama-run ollama://granite-code:8b
  llama-run hf://QuantFactory/SmolLM-135M-GGUF/SmolLM-135M.Q2_K.gguf
  llama-run huggingface://bartowski/SmolLM-1.7B-Instruct-v0.2-GGUF/SmolLM-1.7B-Instruct-v0.2-IQ3_M.gguf
  llama-run https://example.com/some-file1.gguf
  llama-run some-file2.gguf
  llama-run file://some-file3.gguf

Signed-off-by: Eric Curtin <ecurtin@redhat.com>

README.md

@@ -433,6 +433,20 @@ To learn more about model quantization, [read this documentation](examples/quant
 
     </details>
 
+## [`llama-run`](examples/run)
+
+#### A comprehensive example for running `llama.cpp` models. Useful for inferencing. Used with RamaLama [^3].
+
+- <details>
+    <summary>Run a model with a specific prompt (by default it's pulled from Ollama registry)</summary>
+
+    ```bash
+    llama-run granite-code
+    ```
+
+    </details>
+
+[^3]: [https://github.com/containers/ramalama](RamaLama)
 
 ## [`llama-simple`](examples/simple)
 

common/CMakeLists.txt

@@ -81,7 +81,7 @@ set(LLAMA_COMMON_EXTRA_LIBS build_info)
 # Use curl to download model url
 if (LLAMA_CURL)
     find_package(CURL REQUIRED)
-    add_definitions(-DLLAMA_USE_CURL)
+    target_compile_definitions(${TARGET} PUBLIC LLAMA_USE_CURL)
     include_directories(${CURL_INCLUDE_DIRS})
     find_library(CURL_LIBRARY curl REQUIRED)
     set(LLAMA_COMMON_EXTRA_LIBS ${LLAMA_COMMON_EXTRA_LIBS} ${CURL_LIBRARY})

common/common.cpp

@@ -1076,12 +1076,6 @@ struct ggml_threadpool_params ggml_threadpool_params_from_cpu_params(const cpu_p
 #define CURL_MAX_RETRY 3
 #define CURL_RETRY_DELAY_SECONDS 2
 
-
-static bool starts_with(const std::string & str, const std::string & prefix) {
-    // While we wait for C++20's std::string::starts_with...
-    return str.rfind(prefix, 0) == 0;
-}
-
 static bool curl_perform_with_retry(const std::string& url, CURL* curl, int max_attempts, int retry_delay_seconds) {
     int remaining_attempts = max_attempts;
 

common/common.h

@@ -37,9 +37,9 @@ using llama_tokens = std::vector<llama_token>;
 
 // build info
 extern int LLAMA_BUILD_NUMBER;
-extern char const * LLAMA_COMMIT;
-extern char const * LLAMA_COMPILER;
-extern char const * LLAMA_BUILD_TARGET;
+extern const char * LLAMA_COMMIT;
+extern const char * LLAMA_COMPILER;
+extern const char * LLAMA_BUILD_TARGET;
 
 struct common_control_vector_load_info;
 
@@ -437,6 +437,11 @@ std::vector<std::string> string_split<std::string>(const std::string & input, ch
     return parts;
 }
 
+static bool string_starts_with(const std::string & str,
+                               const std::string & prefix) {  // While we wait for C++20's std::string::starts_with...
+    return str.rfind(prefix, 0) == 0;
+}
+
 bool string_parse_kv_override(const char * data, std::vector<llama_model_kv_override> & overrides);
 void string_process_escapes(std::string & input);
 

examples/run/CMakeLists.txt

@@ -1,5 +1,5 @@
 set(TARGET llama-run)
 add_executable(${TARGET} run.cpp)
 install(TARGETS ${TARGET} RUNTIME)
-target_link_libraries(${TARGET} PRIVATE llama ${CMAKE_THREAD_LIBS_INIT})
+target_link_libraries(${TARGET} PRIVATE common llama ${CMAKE_THREAD_LIBS_INIT})
 target_compile_features(${TARGET} PRIVATE cxx_std_17)

examples/run/README.md

@@ -3,5 +3,45 @@
 The purpose of this example is to demonstrate a minimal usage of llama.cpp for running models.
 
 ```bash
-./llama-run Meta-Llama-3.1-8B-Instruct.gguf
+llama-run granite-code
+...
+
+```bash
+llama-run -h
+Description:
+  Runs a llm
+
+Usage:
+  llama-run [options] model [prompt]
+
+Options:
+  -c, --context-size <value>
+      Context size (default: 2048)
+  -n, --ngl <value>
+      Number of GPU layers (default: 0)
+  -h, --help
+      Show help message
+
+Commands:
+  model
+      Model is a string with an optional prefix of
+      huggingface:// (hf://), ollama://, https:// or file://.
+      If no protocol is specified and a file exists in the specified
+      path, file:// is assumed, otherwise if a file does not exist in
+      the specified path, ollama:// is assumed. Models that are being
+      pulled are downloaded with .partial extension while being
+      downloaded and then renamed as the file without the .partial
+      extension when complete.
+
+Examples:
+  llama-run llama3
+  llama-run ollama://granite-code
+  llama-run ollama://smollm:135m
+  llama-run hf://QuantFactory/SmolLM-135M-GGUF/SmolLM-135M.Q2_K.gguf
+  llama-run huggingface://bartowski/SmolLM-1.7B-Instruct-v0.2-GGUF/SmolLM-1.7B-Instruct-v0.2-IQ3_M.gguf
+  llama-run https://example.com/some-file1.gguf
+  llama-run some-file2.gguf
+  llama-run file://some-file3.gguf
+  llama-run --ngl 99 some-file4.gguf
+  llama-run --ngl 99 some-file5.gguf Hello World
 ...

examples/run/run.cpp

@@ -1,128 +1,350 @@
 #if defined(_WIN32)
-#include <windows.h>
+#    include <windows.h>
 #else
-#include <unistd.h>
+#    include <unistd.h>
 #endif
 
-#include <climits>
+#if defined(LLAMA_USE_CURL)
+#    include <curl/curl.h>
+#endif
+
+#include <cstdarg>
 #include <cstdio>
 #include <cstring>
+#include <filesystem>
 #include <iostream>
 #include <sstream>
 #include <string>
-#include <unordered_map>
 #include <vector>
 
+#include "common.h"
+#include "json.hpp"
 #include "llama-cpp.h"
 
-typedef std::unique_ptr<char[]> char_array_ptr;
-
-struct Argument {
-    std::string flag;
-    std::string help_text;
-};
-
-struct Options {
-    std::string model_path, prompt_non_interactive;
-    int ngl = 99;
-    int n_ctx = 2048;
-};
+#define printe(...)                   \
+    do {                              \
+        fprintf(stderr, __VA_ARGS__); \
+    } while (0)
+
+class Opt {
+  public:
+    int init(int argc, const char ** argv) {
+        construct_help_str_();
+        // Parse arguments
+        if (parse(argc, argv)) {
+            printe("Error: Failed to parse arguments.\n");
+            help();
+            return 1;
+        }
 
-class ArgumentParser {
-   public:
-    ArgumentParser(const char * program_name) : program_name(program_name) {}
+        // If help is requested, show help and exit
+        if (help_) {
+            help();
+            return 2;
+        }
 
-    void add_argument(const std::string & flag, std::string & var, const std::string & help_text = "") {
-        string_args[flag] = &var;
-        arguments.push_back({flag, help_text});
+        return 0;  // Success
     }
 
-    void add_argument(const std::string & flag, int & var, const std::string & help_text = "") {
-        int_args[flag] = &var;
-        arguments.push_back({flag, help_text});
+    std::string model_;
+    std::string user_;
+    int         context_size_ = 2048, ngl_ = -1;
+
+  private:
+    std::string help_str_;
+    bool        help_ = false;
+
+    void construct_help_str_() {
+        help_str_ =
+            "Description:\n"
+            "  Runs a llm\n"
+            "\n"
+            "Usage:\n"
+            "  llama-run [options] model [prompt]\n"
+            "\n"
+            "Options:\n"
+            "  -c, --context-size <value>\n"
+            "      Context size (default: " +
+            std::to_string(context_size_);
+        help_str_ +=
+            ")\n"
+            "  -n, --ngl <value>\n"
+            "      Number of GPU layers (default: " +
+            std::to_string(ngl_);
+        help_str_ +=
+            ")\n"
+            "  -h, --help\n"
+            "      Show help message\n"
+            "\n"
+            "Commands:\n"
+            "  model\n"
+            "      Model is a string with an optional prefix of \n"
+            "      huggingface:// (hf://), ollama://, https:// or file://.\n"
+            "      If no protocol is specified and a file exists in the specified\n"
+            "      path, file:// is assumed, otherwise if a file does not exist in\n"
+            "      the specified path, ollama:// is assumed. Models that are being\n"
+            "      pulled are downloaded with .partial extension while being\n"
+            "      downloaded and then renamed as the file without the .partial\n"
+            "      extension when complete.\n"
+            "\n"
+            "Examples:\n"
+            "  llama-run llama3\n"
+            "  llama-run ollama://granite-code\n"
+            "  llama-run ollama://smollm:135m\n"
+            "  llama-run hf://QuantFactory/SmolLM-135M-GGUF/SmolLM-135M.Q2_K.gguf\n"
+            "  llama-run huggingface://bartowski/SmolLM-1.7B-Instruct-v0.2-GGUF/SmolLM-1.7B-Instruct-v0.2-IQ3_M.gguf\n"
+            "  llama-run https://example.com/some-file1.gguf\n"
+            "  llama-run some-file2.gguf\n"
+            "  llama-run file://some-file3.gguf\n"
+            "  llama-run --ngl 99 some-file4.gguf\n"
+            "  llama-run --ngl 99 some-file5.gguf Hello World\n";
     }
 
     int parse(int argc, const char ** argv) {
+        int positional_args_i = 0;
         for (int i = 1; i < argc; ++i) {
-            std::string arg = argv[i];
-            if (string_args.count(arg)) {
-                if (i + 1 < argc) {
-                    *string_args[arg] = argv[++i];
-                } else {
-                    fprintf(stderr, "error: missing value for %s\n", arg.c_str());
-                    print_usage();
+            if (strcmp(argv[i], "-c") == 0 || strcmp(argv[i], "--context-size") == 0) {
+                if (i + 1 >= argc) {
                     return 1;
                 }
-            } else if (int_args.count(arg)) {
-                if (i + 1 < argc) {
-                    if (parse_int_arg(argv[++i], *int_args[arg]) != 0) {
-                        fprintf(stderr, "error: invalid value for %s: %s\n", arg.c_str(), argv[i]);
-                        print_usage();
-                        return 1;
-                    }
-                } else {
-                    fprintf(stderr, "error: missing value for %s\n", arg.c_str());
-                    print_usage();
+
+                context_size_ = std::atoi(argv[++i]);
+            } else if (strcmp(argv[i], "-n") == 0 || strcmp(argv[i], "--ngl") == 0) {
+                if (i + 1 >= argc) {
                     return 1;
                 }
+
+                ngl_ = std::atoi(argv[++i]);
+            } else if (strcmp(argv[i], "-h") == 0 || strcmp(argv[i], "--help") == 0) {
+                help_ = true;
+                return 0;
+            } else if (!positional_args_i) {
+                ++positional_args_i;
+                model_ = argv[i];
+            } else if (positional_args_i == 1) {
+                ++positional_args_i;
+                user_ = argv[i];
             } else {
-                fprintf(stderr, "error: unrecognized argument %s\n", arg.c_str());
-                print_usage();
-                return 1;
+                user_ += " " + std::string(argv[i]);
             }
         }
 
-        if (string_args["-m"]->empty()) {
-            fprintf(stderr, "error: -m is required\n");
-            print_usage();
+        return model_.empty();  // model_ is the only required value
+    }
+
+    void help() const { printf("%s", help_str_.c_str()); }
+};
+
+struct progress_data {
+    size_t file_size = 0;
+    std::chrono::steady_clock::time_point start_time = std::chrono::steady_clock::now();
+    bool   printed   = false;
+};
+
+struct FileDeleter {
+    void operator()(FILE * file) const {
+        if (file) {
+            fclose(file);
+        }
+    }
+};
+
+typedef std::unique_ptr<FILE, FileDeleter> FILE_ptr;
+
+#ifdef LLAMA_USE_CURL
+class CurlWrapper {
+  public:
+    int init(const std::string & url, const std::vector<std::string> & headers, const std::string & output_file,
+             const bool progress, std::string * response_str = nullptr) {
+        std::string output_file_partial;
+        curl = curl_easy_init();
+        if (!curl) {
             return 1;
         }
 
+        progress_data data;
+        FILE_ptr      out;
+        if (!output_file.empty()) {
+            output_file_partial = output_file + ".partial";
+            out.reset(fopen(output_file_partial.c_str(), "ab"));
+        }
+
+        set_write_options(response_str, out);
+        data.file_size = set_resume_point(output_file_partial);
+        set_progress_options(progress, data);
+        set_headers(headers);
+        perform(url);
+        if (!output_file.empty()) {
+            std::filesystem::rename(output_file_partial, output_file);
+        }
+
         return 0;
     }
 
-   private:
-    const char * program_name;
-    std::unordered_map<std::string, std::string *> string_args;
-    std::unordered_map<std::string, int *> int_args;
-    std::vector<Argument> arguments;
+    ~CurlWrapper() {
+        if (chunk) {
+            curl_slist_free_all(chunk);
+        }
 
-    int parse_int_arg(const char * arg, int & value) {
-        char * end;
-        const long val = std::strtol(arg, &end, 10);
-        if (*end == '\0' && val >= INT_MIN && val <= INT_MAX) {
-            value = static_cast<int>(val);
-            return 0;
+        if (curl) {
+            curl_easy_cleanup(curl);
         }
-        return 1;
     }
 
-    void print_usage() const {
-        printf("\nUsage:\n");
-        printf("  %s [OPTIONS]\n\n", program_name);
-        printf("Options:\n");
-        for (const auto & arg : arguments) {
-            printf("  %-10s %s\n", arg.flag.c_str(), arg.help_text.c_str());
+  private:
+    CURL *              curl  = nullptr;
+    struct curl_slist * chunk = nullptr;
+
+    void set_write_options(std::string * response_str, const FILE_ptr & out) {
+        if (response_str) {
+            curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, capture_data);
+            curl_easy_setopt(curl, CURLOPT_WRITEDATA, response_str);
+        } else {
+            curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+            curl_easy_setopt(curl, CURLOPT_WRITEDATA, out.get());
+        }
+    }
+
+    size_t set_resume_point(const std::string & output_file) {
+        size_t file_size = 0;
+        if (std::filesystem::exists(output_file)) {
+            file_size = std::filesystem::file_size(output_file);
+            curl_easy_setopt(curl, CURLOPT_RESUME_FROM_LARGE, static_cast<curl_off_t>(file_size));
+        }
+
+        return file_size;
+    }
+
+    void set_progress_options(bool progress, progress_data & data) {
+        if (progress) {
+            curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
+            curl_easy_setopt(curl, CURLOPT_XFERINFODATA, &data);
+            curl_easy_setopt(curl, CURLOPT_XFERINFOFUNCTION, progress_callback);
         }
+    }
 
-        printf("\n");
+    void set_headers(const std::vector<std::string> & headers) {
+        if (!headers.empty()) {
+            if (chunk) {
+                curl_slist_free_all(chunk);
+                chunk = 0;
+            }
+
+            for (const auto & header : headers) {
+                chunk = curl_slist_append(chunk, header.c_str());
+            }
+
+            curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk);
+        }
+    }
+
+    void perform(const std::string & url) {
+        CURLcode res;
+        curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
+        curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
+        curl_easy_setopt(curl, CURLOPT_DEFAULT_PROTOCOL, "https");
+        curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1L);
+        res = curl_easy_perform(curl);
+        if (res != CURLE_OK) {
+            printe("curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
+        }
+    }
+
+    static std::string human_readable_time(double seconds) {
+        int hrs  = static_cast<int>(seconds) / 3600;
+        int mins = (static_cast<int>(seconds) % 3600) / 60;
+        int secs = static_cast<int>(seconds) % 60;
+
+        std::ostringstream out;
+        if (hrs > 0) {
+            out << hrs << "h " << std::setw(2) << std::setfill('0') << mins << "m " << std::setw(2) << std::setfill('0')
+                << secs << "s";
+        } else if (mins > 0) {
+            out << mins << "m " << std::setw(2) << std::setfill('0') << secs << "s";
+        } else {
+            out << secs << "s";
+        }
+
+        return out.str();
+    }
+
+    static std::string human_readable_size(curl_off_t size) {
+        static const char * suffix[] = { "B", "KB", "MB", "GB", "TB" };
+        char         length   = sizeof(suffix) / sizeof(suffix[0]);
+        int          i        = 0;
+        double       dbl_size = size;
+        if (size > 1024) {
+            for (i = 0; (size / 1024) > 0 && i < length - 1; i++, size /= 1024) {
+                dbl_size = size / 1024.0;
+            }
+        }
+
+        std::ostringstream out;
+        out << std::fixed << std::setprecision(2) << dbl_size << " " << suffix[i];
+        return out.str();
+    }
+
+    static int progress_callback(void * ptr, curl_off_t total_to_download, curl_off_t now_downloaded, curl_off_t,
+                                 curl_off_t) {
+        progress_data * data = static_cast<progress_data *>(ptr);
+        if (total_to_download <= 0) {
+            return 0;
+        }
+
+        total_to_download += data->file_size;
+        const curl_off_t now_downloaded_plus_file_size = now_downloaded + data->file_size;
+        const curl_off_t percentage                    = (now_downloaded_plus_file_size * 100) / total_to_download;
+        const curl_off_t pos                           = (percentage / 5);
+        std::string progress_bar;
+        for (int i = 0; i < 20; ++i) {
+            progress_bar.append((i < pos) ? "█" : " ");
+        }
+
+        // Calculate download speed and estimated time to completion
+        const auto                          now             = std::chrono::steady_clock::now();
+        const std::chrono::duration<double> elapsed_seconds = now - data->start_time;
+        const double                        speed           = now_downloaded / elapsed_seconds.count();
+        const double                        estimated_time  = (total_to_download - now_downloaded) / speed;
+        printe("\r%ld%% |%s| %s/%s  %.2f MB/s  %s      ", percentage, progress_bar.c_str(),
+               human_readable_size(now_downloaded).c_str(), human_readable_size(total_to_download).c_str(),
+               speed / (1024 * 1024), human_readable_time(estimated_time).c_str());
+        fflush(stderr);
+        data->printed = true;
+
+        return 0;
+    }
+
+    // Function to write data to a file
+    static size_t write_data(void * ptr, size_t size, size_t nmemb, void * stream) {
+        FILE * out = static_cast<FILE *>(stream);
+        return fwrite(ptr, size, nmemb, out);
+    }
+
+    // Function to capture data into a string
+    static size_t capture_data(void * ptr, size_t size, size_t nmemb, void * stream) {
+        std::string * str = static_cast<std::string *>(stream);
+        str->append(static_cast<char *>(ptr), size * nmemb);
+        return size * nmemb;
     }
 };
+#endif
 
 class LlamaData {
-   public:
-    llama_model_ptr model;
-    llama_sampler_ptr sampler;
-    llama_context_ptr context;
+  public:
+    llama_model_ptr                 model;
+    llama_sampler_ptr               sampler;
+    llama_context_ptr               context;
     std::vector<llama_chat_message> messages;
+    std::vector<std::string>        msg_strs;
+    std::vector<char>               fmtted;
 
-    int init(const Options & opt) {
-        model = initialize_model(opt.model_path, opt.ngl);
+    int init(Opt & opt) {
+        model = initialize_model(opt);
         if (!model) {
             return 1;
         }
 
-        context = initialize_context(model, opt.n_ctx);
+        context = initialize_context(model, opt.context_size_);
         if (!context) {
             return 1;
         }
@@ -131,15 +353,123 @@ class LlamaData {
         return 0;
     }
 
-   private:
+  private:
+#ifdef LLAMA_USE_CURL
+    int download(const std::string & url, const std::vector<std::string> & headers, const std::string & output_file,
+                 const bool progress, std::string * response_str = nullptr) {
+        CurlWrapper curl;
+        if (curl.init(url, headers, output_file, progress, response_str)) {
+            return 1;
+        }
+
+        return 0;
+    }
+#else
+    int download(const std::string &, const std::vector<std::string> &, const std::string &, const bool,
+                 std::string * = nullptr) {
+        printe("%s: llama.cpp built without libcurl, downloading from an url not supported.\n", __func__);
+        return 1;
+    }
+#endif
+
+    int huggingface_dl(const std::string & model, const std::vector<std::string> headers, const std::string & bn) {
+        // Find the second occurrence of '/' after protocol string
+        size_t pos = model.find('/');
+        pos        = model.find('/', pos + 1);
+        if (pos == std::string::npos) {
+            return 1;
+        }
+
+        const std::string hfr = model.substr(0, pos);
+        const std::string hff = model.substr(pos + 1);
+        const std::string url = "https://huggingface.co/" + hfr + "/resolve/main/" + hff;
+        return download(url, headers, bn, true);
+    }
+
+    int ollama_dl(std::string & model, const std::vector<std::string> headers, const std::string & bn) {
+        if (model.find('/') == std::string::npos) {
+            model = "library/" + model;
+        }
+
+        std::string model_tag = "latest";
+        size_t      colon_pos = model.find(':');
+        if (colon_pos != std::string::npos) {
+            model_tag = model.substr(colon_pos + 1);
+            model     = model.substr(0, colon_pos);
+        }
+
+        std::string manifest_url = "https://registry.ollama.ai/v2/" + model + "/manifests/" + model_tag;
+        std::string manifest_str;
+        const int   ret = download(manifest_url, headers, "", false, &manifest_str);
+        if (ret) {
+            return ret;
+        }
+
+        nlohmann::json manifest = nlohmann::json::parse(manifest_str);
+        std::string    layer;
+        for (const auto & l : manifest["layers"]) {
+            if (l["mediaType"] == "application/vnd.ollama.image.model") {
+                layer = l["digest"];
+                break;
+            }
+        }
+
+        std::string blob_url = "https://registry.ollama.ai/v2/" + model + "/blobs/" + layer;
+        return download(blob_url, headers, bn, true);
+    }
+
+    std::string basename(const std::string & path) {
+        const size_t pos = path.find_last_of("/\\");
+        if (pos == std::string::npos) {
+            return path;
+        }
+
+        return path.substr(pos + 1);
+    }
+
+    int remove_proto(std::string & model_) {
+        const std::string::size_type pos = model_.find("://");
+        if (pos == std::string::npos) {
+            return 1;
+        }
+
+        model_ = model_.substr(pos + 3);  // Skip past "://"
+        return 0;
+    }
+
+    int resolve_model(std::string & model_) {
+        const std::string              bn      = basename(model_);
+        const std::vector<std::string> headers = { "--header",
+                                                   "Accept: application/vnd.docker.distribution.manifest.v2+json" };
+        int                            ret     = 0;
+        if (string_starts_with(model_, "file://") || std::filesystem::exists(bn)) {
+            remove_proto(model_);
+        } else if (string_starts_with(model_, "hf://") || string_starts_with(model_, "huggingface://")) {
+            remove_proto(model_);
+            ret = huggingface_dl(model_, headers, bn);
+        } else if (string_starts_with(model_, "ollama://")) {
+            remove_proto(model_);
+            ret = ollama_dl(model_, headers, bn);
+        } else if (string_starts_with(model_, "https://")) {
+            download(model_, headers, bn, true);
+        } else {
+            ret = ollama_dl(model_, headers, bn);
+        }
+
+        model_ = bn;
+
+        return ret;
+    }
+
     // Initializes the model and returns a unique pointer to it
-    llama_model_ptr initialize_model(const std::string & model_path, const int ngl) {
+    llama_model_ptr initialize_model(Opt & opt) {
+        ggml_backend_load_all();
         llama_model_params model_params = llama_model_default_params();
-        model_params.n_gpu_layers = ngl;
-
-        llama_model_ptr model(llama_load_model_from_file(model_path.c_str(), model_params));
+        model_params.n_gpu_layers       = opt.ngl_ >= 0 ? opt.ngl_ : model_params.n_gpu_layers;
+        resolve_model(opt.model_);
+        llama_model_ptr model(llama_load_model_from_file(opt.model_.c_str(), model_params));
         if (!model) {
-            fprintf(stderr, "%s: error: unable to load model\n", __func__);
+            printe("%s: error: unable to load model from file: %s\n", __func__, opt.model_.c_str());
         }
 
         return model;
@@ -148,12 +478,11 @@ class LlamaData {
     // Initializes the context with the specified parameters
     llama_context_ptr initialize_context(const llama_model_ptr & model, const int n_ctx) {
         llama_context_params ctx_params = llama_context_default_params();
-        ctx_params.n_ctx = n_ctx;
-        ctx_params.n_batch = n_ctx;
-
+        ctx_params.n_ctx                = n_ctx;
+        ctx_params.n_batch              = n_ctx;
         llama_context_ptr context(llama_new_context_with_model(model.get(), ctx_params));
         if (!context) {
-            fprintf(stderr, "%s: error: failed to create the llama_context\n", __func__);
+            printe("%s: error: failed to create the llama_context\n", __func__);
         }
 
         return context;
@@ -170,23 +499,22 @@ class LlamaData {
     }
 };
 
-// Add a message to `messages` and store its content in `owned_content`
-static void add_message(const char * role, const std::string & text, LlamaData & llama_data,
-                        std::vector<char_array_ptr> & owned_content) {
-    char_array_ptr content(new char[text.size() + 1]);
-    std::strcpy(content.get(), text.c_str());
-    llama_data.messages.push_back({role, content.get()});
-    owned_content.push_back(std::move(content));
+// Add a message to `messages` and store its content in `msg_strs`
+static void add_message(const char * role, const std::string & text, LlamaData & llama_data) {
+    llama_data.msg_strs.push_back(std::move(text));
+    llama_data.messages.push_back({ role, llama_data.msg_strs.back().c_str() });
 }
 
 // Function to apply the chat template and resize `formatted` if needed
-static int apply_chat_template(const LlamaData & llama_data, std::vector<char> & formatted, const bool append) {
-    int result = llama_chat_apply_template(llama_data.model.get(), nullptr, llama_data.messages.data(),
-                                           llama_data.messages.size(), append, formatted.data(), formatted.size());
-    if (result > static_cast<int>(formatted.size())) {
-        formatted.resize(result);
+static int apply_chat_template(LlamaData & llama_data, const bool append) {
+    int result = llama_chat_apply_template(
+        llama_data.model.get(), nullptr, llama_data.messages.data(), llama_data.messages.size(), append,
+        append ? llama_data.fmtted.data() : nullptr, append ? llama_data.fmtted.size() : 0);
+    if (append && result > static_cast<int>(llama_data.fmtted.size())) {
+        llama_data.fmtted.resize(result);
         result = llama_chat_apply_template(llama_data.model.get(), nullptr, llama_data.messages.data(),
-                                           llama_data.messages.size(), append, formatted.data(), formatted.size());
+                                           llama_data.messages.size(), append, llama_data.fmtted.data(),
+                                           llama_data.fmtted.size());
     }
 
     return result;
@@ -199,7 +527,8 @@ static int tokenize_prompt(const llama_model_ptr & model, const std::string & pr
     prompt_tokens.resize(n_prompt_tokens);
     if (llama_tokenize(model.get(), prompt.c_str(), prompt.size(), prompt_tokens.data(), prompt_tokens.size(), true,
                        true) < 0) {
-        GGML_ABORT("failed to tokenize the prompt\n");
+        printe("failed to tokenize the prompt\n");
+        return -1;
     }
 
     return n_prompt_tokens;
@@ -207,11 +536,11 @@ static int tokenize_prompt(const llama_model_ptr & model, const std::string & pr
 
 // Check if we have enough space in the context to evaluate this batch
 static int check_context_size(const llama_context_ptr & ctx, const llama_batch & batch) {
-    const int n_ctx = llama_n_ctx(ctx.get());
+    const int n_ctx      = llama_n_ctx(ctx.get());
     const int n_ctx_used = llama_get_kv_cache_used_cells(ctx.get());
     if (n_ctx_used + batch.n_tokens > n_ctx) {
         printf("\033[0m\n");
-        fprintf(stderr, "context size exceeded\n");
+        printe("context size exceeded\n");
         return 1;
     }
 
@@ -221,9 +550,10 @@ static int check_context_size(const llama_context_ptr & ctx, const llama_batch &
 // convert the token to a string
 static int convert_token_to_string(const llama_model_ptr & model, const llama_token token_id, std::string & piece) {
     char buf[256];
-    int n = llama_token_to_piece(model.get(), token_id, buf, sizeof(buf), 0, true);
+    int  n = llama_token_to_piece(model.get(), token_id, buf, sizeof(buf), 0, true);
     if (n < 0) {
-        GGML_ABORT("failed to convert token to piece\n");
+        printe("failed to convert token to piece\n");
+        return 1;
     }
 
     piece = std::string(buf, n);
@@ -238,19 +568,19 @@ static void print_word_and_concatenate_to_response(const std::string & piece, st
 
 // helper function to evaluate a prompt and generate a response
 static int generate(LlamaData & llama_data, const std::string & prompt, std::string & response) {
-    std::vector<llama_token> prompt_tokens;
-    const int n_prompt_tokens = tokenize_prompt(llama_data.model, prompt, prompt_tokens);
-    if (n_prompt_tokens < 0) {
+    std::vector<llama_token> tokens;
+    if (tokenize_prompt(llama_data.model, prompt, tokens) < 0) {
         return 1;
     }
 
     // prepare a batch for the prompt
-    llama_batch batch = llama_batch_get_one(prompt_tokens.data(), prompt_tokens.size());
+    llama_batch batch = llama_batch_get_one(tokens.data(), tokens.size());
     llama_token new_token_id;
     while (true) {
         check_context_size(llama_data.context, batch);
         if (llama_decode(llama_data.context.get(), batch)) {
-            GGML_ABORT("failed to decode\n");
+            printe("failed to decode\n");
+            return 1;
         }
 
         // sample the next token, check is it an end of generation?
@@ -273,22 +603,9 @@ static int generate(LlamaData & llama_data, const std::string & prompt, std::str
     return 0;
 }
 
-static int parse_arguments(const int argc, const char ** argv, Options & opt) {
-    ArgumentParser parser(argv[0]);
-    parser.add_argument("-m", opt.model_path, "model");
-    parser.add_argument("-p", opt.prompt_non_interactive, "prompt");
-    parser.add_argument("-c", opt.n_ctx, "context_size");
-    parser.add_argument("-ngl", opt.ngl, "n_gpu_layers");
-    if (parser.parse(argc, argv)) {
-        return 1;
-    }
-
-    return 0;
-}
-
 static int read_user_input(std::string & user) {
     std::getline(std::cin, user);
-    return user.empty();  // Indicate an error or empty input
+    return user.empty();  // Should have data in happy path
 }
 
 // Function to generate a response based on the prompt
@@ -296,7 +613,7 @@ static int generate_response(LlamaData & llama_data, const std::string & prompt,
     // Set response color
     printf("\033[33m");
     if (generate(llama_data, prompt, response)) {
-        fprintf(stderr, "failed to generate response\n");
+        printe("failed to generate response\n");
         return 1;
     }
 
@@ -306,11 +623,10 @@ static int generate_response(LlamaData & llama_data, const std::string & prompt,
 }
 
 // Helper function to apply the chat template and handle errors
-static int apply_chat_template_with_error_handling(const LlamaData & llama_data, std::vector<char> & formatted,
-                                                   const bool is_user_input, int & output_length) {
-    const int new_len = apply_chat_template(llama_data, formatted, is_user_input);
+static int apply_chat_template_with_error_handling(LlamaData & llama_data, const bool append, int & output_length) {
+    const int new_len = apply_chat_template(llama_data, append);
     if (new_len < 0) {
-        fprintf(stderr, "failed to apply the chat template\n");
+        printe("failed to apply the chat template\n");
         return -1;
     }
 
@@ -319,56 +635,63 @@ static int apply_chat_template_with_error_handling(const LlamaData & llama_data,
 }
 
 // Helper function to handle user input
-static bool handle_user_input(std::string & user_input, const std::string & prompt_non_interactive) {
-    if (!prompt_non_interactive.empty()) {
-        user_input = prompt_non_interactive;
-        return true;  // No need for interactive input
+static int handle_user_input(std::string & user_input, const std::string & user_) {
+    if (!user_.empty()) {
+        user_input = user_;
+        return 0;  // No need for interactive input
     }
 
-    printf("\033[32m> \033[0m");
-    return !read_user_input(user_input);  // Returns false if input ends the loop
+    printf(
+        "\r                                                                       "
+        "\r\033[32m> \033[0m");
+    return read_user_input(user_input);  // Returns true if input ends the loop
 }
 
 // Function to tokenize the prompt
-static int chat_loop(LlamaData & llama_data, std::string & prompt_non_interactive) {
-    std::vector<char_array_ptr> owned_content;
-    std::vector<char> fmtted(llama_n_ctx(llama_data.context.get()));
+static int chat_loop(LlamaData & llama_data, const std::string & user_) {
     int prev_len = 0;
-
+    llama_data.fmtted.resize(llama_n_ctx(llama_data.context.get()));
     while (true) {
         // Get user input
         std::string user_input;
-        if (!handle_user_input(user_input, prompt_non_interactive)) {
-            break;
+        while (handle_user_input(user_input, user_)) {
         }
 
-        add_message("user", prompt_non_interactive.empty() ? user_input : prompt_non_interactive, llama_data,
-                    owned_content);
-
+        add_message("user", user_.empty() ? user_input : user_, llama_data);
         int new_len;
-        if (apply_chat_template_with_error_handling(llama_data, fmtted, true, new_len) < 0) {
+        if (apply_chat_template_with_error_handling(llama_data, true, new_len) < 0) {
             return 1;
         }
 
-        std::string prompt(fmtted.begin() + prev_len, fmtted.begin() + new_len);
+        std::string prompt(llama_data.fmtted.begin() + prev_len, llama_data.fmtted.begin() + new_len);
         std::string response;
         if (generate_response(llama_data, prompt, response)) {
             return 1;
         }
+
+        if (!user_.empty()) {
+            break;
+        }
+
+        add_message("assistant", response, llama_data);
+        if (apply_chat_template_with_error_handling(llama_data, false, prev_len) < 0) {
+            return 1;
+        }
     }
+
     return 0;
 }
 
 static void log_callback(const enum ggml_log_level level, const char * text, void *) {
     if (level == GGML_LOG_LEVEL_ERROR) {
-        fprintf(stderr, "%s", text);
+        printe("%s", text);
     }
 }
 
 static bool is_stdin_a_terminal() {
 #if defined(_WIN32)
     HANDLE hStdin = GetStdHandle(STD_INPUT_HANDLE);
-    DWORD mode;
+    DWORD  mode;
     return GetConsoleMode(hStdin, &mode);
 #else
     return isatty(STDIN_FILENO);
@@ -382,17 +705,20 @@ static std::string read_pipe_data() {
 }
 
 int main(int argc, const char ** argv) {
-    Options opt;
-    if (parse_arguments(argc, argv, opt)) {
+    Opt       opt;
+    const int ret = opt.init(argc, argv);
+    if (ret == 2) {
+        return 0;
+    } else if (ret) {
         return 1;
     }
 
     if (!is_stdin_a_terminal()) {
-        if (!opt.prompt_non_interactive.empty()) {
-            opt.prompt_non_interactive += "\n\n";
+        if (!opt.user_.empty()) {
+            opt.user_ += "\n\n";
         }
 
-        opt.prompt_non_interactive += read_pipe_data();
+        opt.user_ += read_pipe_data();
     }
 
     llama_log_set(log_callback, nullptr);
@@ -401,7 +727,7 @@ int main(int argc, const char ** argv) {
         return 1;
     }
 
-    if (chat_loop(llama_data, opt.prompt_non_interactive)) {
+    if (chat_loop(llama_data, opt.user_)) {
         return 1;
     }