chore: import upstream snapshot with attribution

tools/cli/cli.cpp

@@ -0,0 +1,65 @@
+#include "arg.h"
+#include "common.h"
+#include "log.h"
+
+#include "cli-context.h"
+
+#include <signal.h>
+
+#if defined(_WIN32)
+#define WIN32_LEAN_AND_MEAN
+#ifndef NOMINMAX
+#   define NOMINMAX
+#endif
+#include <windows.h>
+#endif
+
+#if defined (__unix__) || (defined (__APPLE__) && defined (__MACH__)) || defined (_WIN32)
+static void signal_handler(int) {
+    if (cli_context::interrupted().load()) {
+        // second Ctrl+C - exit immediately
+        // make sure to clear colors before exiting (not using LOG or console.cpp here to avoid deadlock)
+        fprintf(stdout, "\033[0m\n");
+        fflush(stdout);
+        std::exit(130);
+    }
+    cli_context::interrupted().store(true);
+}
+#endif
+
+// satisfies -Wmissing-declarations
+int llama_cli(int argc, char ** argv);
+
+int llama_cli(int argc, char ** argv) {
+    common_params params;
+
+    params.verbosity = LOG_LEVEL_ERROR; // by default, less verbose logs
+
+    common_init();
+
+    if (!common_params_parse(argc, argv, params, LLAMA_EXAMPLE_CLI)) {
+        return 1;
+    }
+
+#if defined (__unix__) || (defined (__APPLE__) && defined (__MACH__))
+    struct sigaction sigint_action;
+    sigint_action.sa_handler = signal_handler;
+    sigemptyset (&sigint_action.sa_mask);
+    sigint_action.sa_flags = 0;
+    sigaction(SIGINT, &sigint_action, NULL);
+    sigaction(SIGTERM, &sigint_action, NULL);
+#elif defined (_WIN32)
+    auto console_ctrl_handler = +[](DWORD ctrl_type) -> BOOL {
+        return (ctrl_type == CTRL_C_EVENT) ? (signal_handler(SIGINT), true) : false;
+    };
+    SetConsoleCtrlHandler(reinterpret_cast<PHANDLER_ROUTINE>(console_ctrl_handler), true);
+#endif
+
+    cli_context ctx_cli(params);
+
+    if (!ctx_cli.init()) {
+        return 1;
+    }
+
+    return ctx_cli.run();
+}