mirror of
https://github.com/ggml-org/llama.cpp.git
synced 2026-06-29 07:40:21 +00:00
Xuan-Son Nguyen
57fe1f07c3
* server: clean up static assets handling * nits * simplify file name handling, use static file name everywhere * cmake/ui : bundle UI assets in an archive * ui : run prettier on post-build.js --------- Co-authored-by: Alde Rojas <hello@alde.dev>
244 lines
8.2 KiB
C++
244 lines
8.2 KiB
C++
// llama-ui-embed: generate ui.cpp / ui.h that embed UI assets as C arrays.
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//
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// Usage:
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// llama-ui-embed <out_cpp> <out_h> [<asset_dir>]
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//
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// Embeds every regular file directly under <asset_dir> (non-recursive).
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// Without <asset_dir>, emits an empty asset table.
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#include <inttypes.h>
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <algorithm>
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#include <filesystem>
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#include <fstream>
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#include <string>
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#include <vector>
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static const char * mime_from_ext(const std::string & name) {
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auto ext = name.rfind('.');
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if (ext == std::string::npos) return "application/octet-stream";
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std::string e = name.substr(ext + 1);
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if (e == "html") return "text/html; charset=utf-8";
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if (e == "css") return "text/css";
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if (e == "js") return "application/javascript";
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if (e == "json") return "application/json";
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if (e == "webmanifest") return "application/manifest+json";
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if (e == "svg") return "image/svg+xml";
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if (e == "png") return "image/png";
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if (e == "jpg" ||
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e == "jpeg") return "image/jpeg";
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if (e == "ico") return "image/x-icon";
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if (e == "woff") return "font/woff";
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if (e == "woff2") return "font/woff2";
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return "application/octet-stream";
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}
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// Computes FNV-1a hash of the data
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static uint64_t fnv_hash(const uint8_t * data, size_t len) {
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const uint64_t fnv_prime = 0x100000001b3ULL;
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uint64_t hash = 0xcbf29ce484222325ULL;
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for (size_t i = 0; i < len; ++i) {
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hash ^= data[i];
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hash *= fnv_prime;
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}
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return hash;
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}
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static bool read_file(const std::filesystem::path & path, std::vector<unsigned char> & out) {
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std::ifstream f(path, std::ios::binary | std::ios::ate);
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if (!f) {
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fprintf(stderr, "embed: cannot open %s\n", path.string().c_str());
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return false;
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}
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const auto sz = f.tellg();
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if (sz < 0) {
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return false;
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}
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f.seekg(0);
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out.resize(static_cast<size_t>(sz));
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if (sz > 0 && !f.read(reinterpret_cast<char *>(out.data()), sz)) {
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return false;
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}
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return true;
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}
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static void append_bytes_hex(std::string & out, const std::vector<unsigned char> & bytes) {
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static const char hex[] = "0123456789abcdef";
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out.reserve(out.size() + bytes.size() * 5);
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for (unsigned char b : bytes) {
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out += '0';
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out += 'x';
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out += hex[b >> 4];
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out += hex[b & 0xf];
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out += ',';
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}
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}
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static bool write_if_different(const std::string & path, const std::string & content) {
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std::ifstream f(path, std::ios::binary | std::ios::ate);
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if (f) {
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const auto sz = f.tellg();
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if (sz >= 0 && static_cast<size_t>(sz) == content.size()) {
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std::string existing(static_cast<size_t>(sz), '\0');
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f.seekg(0);
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if (sz == 0 || f.read(existing.data(), sz)) {
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if (existing == content) {
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return true;
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}
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}
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}
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}
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std::ofstream out(path, std::ios::binary | std::ios::trunc);
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if (!out) {
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fprintf(stderr, "embed: cannot write %s\n", path.c_str());
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return false;
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}
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if (!content.empty()) {
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out.write(content.data(), static_cast<std::streamsize>(content.size()));
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}
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return out.good();
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}
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static std::string fmt(const char * pattern, ...) {
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char tmp[512];
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va_list ap;
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va_start(ap, pattern);
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const int n = vsnprintf(tmp, sizeof(tmp), pattern, ap);
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va_end(ap);
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return (n > 0) ? std::string(tmp, static_cast<size_t>(n)) : std::string();
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}
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struct asset_entry {
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std::string name;
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std::filesystem::path path;
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};
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int main(int argc, char ** argv) {
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if (argc < 3 || argc > 4) {
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fprintf(stderr, "usage: %s <out_cpp> <out_h> [<asset_dir>]\n", argv[0]);
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return 1;
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}
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const std::string out_cpp = argv[1];
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const std::string out_h = argv[2];
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std::vector<asset_entry> assets;
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if (argc == 4) {
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const std::filesystem::path dir = argv[3];
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std::error_code ec;
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std::filesystem::directory_iterator it(dir, ec);
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if (ec) {
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fprintf(stderr, "embed: cannot iterate %s: %s\n", argv[3], ec.message().c_str());
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return 1;
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}
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for (const auto & entry : it) {
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if (!entry.is_regular_file()) {
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continue;
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}
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assets.push_back({ entry.path().filename().generic_string(), entry.path() });
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}
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// directory iteration order is unspecified; sort for reproducible output
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std::sort(assets.begin(), assets.end(),
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[](const asset_entry & a, const asset_entry & b) { return a.name < b.name; });
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}
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const int n_assets = static_cast<int>(assets.size());
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if (n_assets > 0) {
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bool has_index = false, has_bundle_js = false, has_bundle_css = false, has_version = false;
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for (const auto & a : assets) {
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if (a.name == "index.html") has_index = true;
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if (a.name == "bundle.js") has_bundle_js = true;
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if (a.name == "bundle.css") has_bundle_css = true;
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if (a.name == "version.json") has_version = true;
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}
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if (!has_index || !has_bundle_js || !has_bundle_css || !has_version) {
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fprintf(stderr, "embed: missing required assets (need index.html, bundle.js, bundle.css, version.json); got:\n");
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for (const auto & a : assets) {
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fprintf(stderr, " %s\n", a.name.c_str());
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}
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return 1;
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}
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}
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std::string h;
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h += "#pragma once\n\n#include <array>\n#include <string>\n\n";
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if (n_assets > 0) {
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h += "#define LLAMA_UI_HAS_ASSETS 1\n\n";
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}
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h +=
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"struct llama_ui_asset {\n"
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" std::string name;\n"
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" const unsigned char * data;\n"
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" std::size_t size;\n"
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" std::string etag;\n"
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" std::string type;\n"
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"};\n\n"
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"const llama_ui_asset * llama_ui_find_asset(const std::string & name);\n";
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h += fmt("const std::array<llama_ui_asset, %d> & llama_ui_get_assets();\n", n_assets);
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std::string cpp;
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cpp += "#include \"ui.h\"\n\n";
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if (n_assets > 0) {
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for (int i = 0; i < n_assets; i++) {
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std::vector<unsigned char> bytes;
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if (!read_file(assets[i].path, bytes)) {
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return 1;
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}
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cpp += fmt("static const unsigned char asset_%d_data[] = {", i);
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append_bytes_hex(cpp, bytes);
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const auto hash = fnv_hash(bytes.data(), bytes.size());
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cpp += fmt("};\nstatic const std::size_t asset_%d_size = %zu;\n",
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i, bytes.size());
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cpp += fmt("static const char asset_%d_etag[] = \"\\\"0x%016" PRIx64 "\\\"\";\n\n",
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i, hash);
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}
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cpp += fmt("static const std::array<llama_ui_asset, %d> g_assets = {{\n", n_assets);
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for (int i = 0; i < n_assets; i++) {
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const std::string & name = assets[i].name;
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cpp += fmt(" { \"%s\", asset_%d_data, asset_%d_size, asset_%d_etag, \"%s\" },\n",
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name.c_str(), i, i, i, mime_from_ext(name));
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}
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cpp += "}};\n\n";
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cpp +=
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"const llama_ui_asset * llama_ui_find_asset(const std::string & name) {\n"
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" for (const auto & a : g_assets) {\n"
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" if (a.name == name) {\n"
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" return &a;\n"
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" }\n"
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" }\n"
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" return nullptr;\n"
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"}\n";
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cpp += fmt("const std::array<llama_ui_asset, %d> & llama_ui_get_assets() {\n", n_assets);
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cpp += " return g_assets;\n"
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"}\n";
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} else {
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cpp +=
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"const llama_ui_asset * llama_ui_find_asset(const std::string &) {\n"
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" return nullptr;\n"
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"}\n"
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"const std::array<llama_ui_asset, 0> & llama_ui_get_assets() {\n"
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" static const std::array<llama_ui_asset, 0> empty{};\n"
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" return empty;\n"
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"}\n";
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}
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bool ok = true;
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ok = write_if_different(out_h, h) && ok;
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ok = write_if_different(out_cpp, cpp) && ok;
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return ok ? 0 : 1;
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}
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