Improve Python and Linenoise

This change reinvents all the GNU Readline features I discovered that I
couldn't live without, e.g. UTF-8, CTRL-R search and CTRL-Y yanking. It
now feels just as good in terms of user interface from the subconscious
workflow perspective. It's real nice to finally have an embeddable line
reader that's actually good with a 30 kb footprint and a bsd-2 license.

This change adds a directory to the examples folder, explaining how the
new Python compiler may be used.  Some of the bugs with Python binaries
have been addressed but overall it's still a work in progress.

third_party/python/Programs/hello.c

@@ -1,2 +0,0 @@
-#define LAUNCH "hello"
-#include "third_party/python/Programs/launch.c"

third_party/python/Programs/httpserver.c

@@ -1,2 +0,0 @@
-#define LAUNCH "http.server"
-#include "third_party/python/Programs/launch.c"

third_party/python/Programs/launch.c

@@ -1,143 +0,0 @@
-/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8 -*-│
-│vi: set net ft=c ts=4 sts=4 sw=4 fenc=utf-8                                :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Python 3                                                                     │
-│ https://docs.python.org/3/license.html                                       │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/bits/bits.h"
-#include "libc/bits/safemacros.internal.h"
-#include "libc/calls/calls.h"
-#include "libc/dce.h"
-#include "libc/errno.h"
-#include "libc/log/check.h"
-#include "libc/log/log.h"
-#include "libc/mem/mem.h"
-#include "libc/nexgen32e/rdtsc.h"
-#include "libc/runtime/gc.internal.h"
-#include "libc/runtime/runtime.h"
-#include "libc/runtime/symbols.internal.h"
-#include "libc/stdio/stdio.h"
-#include "libc/str/str.h"
-#include "libc/sysv/consts/fileno.h"
-#include "libc/sysv/consts/sig.h"
-#include "libc/unicode/locale.h"
-#include "libc/x/x.h"
-#include "libc/zip.h"
-#include "third_party/linenoise/linenoise.h"
-#include "third_party/python/Include/abstract.h"
-#include "third_party/python/Include/ceval.h"
-#include "third_party/python/Include/dictobject.h"
-#include "third_party/python/Include/fileutils.h"
-#include "third_party/python/Include/funcobject.h"
-#include "third_party/python/Include/import.h"
-#include "third_party/python/Include/listobject.h"
-#include "third_party/python/Include/modsupport.h"
-#include "third_party/python/Include/moduleobject.h"
-#include "third_party/python/Include/object.h"
-#include "third_party/python/Include/pydebug.h"
-#include "third_party/python/Include/pyerrors.h"
-#include "third_party/python/Include/pylifecycle.h"
-#include "third_party/python/Include/pymem.h"
-#include "third_party/python/Include/pyport.h"
-#include "third_party/python/Include/pythonrun.h"
-#include "third_party/python/Include/sysmodule.h"
-#include "third_party/python/Include/unicodeobject.h"
-#include "third_party/python/Include/yoink.h"
-/* clang-format off */
-
-#define _L(x) L##x
-#define L(x) _L(x)
-
-PYTHON_YOINK(LAUNCH);
-
-PYTHON_YOINK("_bootlocale");
-PYTHON_YOINK("_locale");
-PYTHON_YOINK("encodings.aliases");
-PYTHON_YOINK("encodings.latin_1");
-PYTHON_YOINK("encodings.utf_8");
-PYTHON_YOINK("launchpy");
-
-const struct _frozen *PyImport_FrozenModules = _PyImport_FrozenModules;
-struct _inittab *PyImport_Inittab = _PyImport_Inittab;
-
-static int LaunchModule(wchar_t *modname)
-{
-    PyObject *module, *runpy, *runmodule, *runargs, *result;
-    runpy = PyImport_ImportModule("launchpy");
-    if (runpy == NULL) {
-        fprintf(stderr, "Could not import launchpy module\n");
-        PyErr_Print();
-        return -1;
-    }
-    runmodule = PyObject_GetAttrString(runpy, "run_module_as_main");
-    if (runmodule == NULL) {
-        fprintf(stderr, "Could not access launchpy.run_module_as_main\n");
-        PyErr_Print();
-        Py_DECREF(runpy);
-        return -1;
-    }
-    module = PyUnicode_FromWideChar(modname, wcslen(modname));
-    if (module == NULL) {
-        fprintf(stderr, "Could not convert module name to unicode\n");
-        PyErr_Print();
-        Py_DECREF(runpy);
-        Py_DECREF(runmodule);
-        return -1;
-    }
-    runargs = Py_BuildValue("(O)", module);
-    if (runargs == NULL) {
-        fprintf(stderr,
-            "Could not create arguments for runpy._run_module_as_main\n");
-        PyErr_Print();
-        Py_DECREF(runpy);
-        Py_DECREF(runmodule);
-        Py_DECREF(module);
-        return -1;
-    }
-    result = PyObject_Call(runmodule, runargs, NULL);
-    if (result == NULL) {
-        PyErr_Print();
-    }
-    Py_DECREF(runpy);
-    Py_DECREF(runmodule);
-    Py_DECREF(module);
-    Py_DECREF(runargs);
-    if (result == NULL) {
-        return -1;
-    }
-    Py_DECREF(result);
-    return 0;
-}
-
-int
-main(int argc, char **argv)
-{
-    int i, res;
-    char *oldloc;
-    wchar_t **argv_copy;
-    wchar_t **argv_copy2;
-    _PyMem_SetupAllocators("malloc");
-    argv_copy = gc(malloc(sizeof(wchar_t*) * (argc+1)));
-    argv_copy2 = gc(malloc(sizeof(wchar_t*) * (argc+1)));
-    oldloc = _PyMem_RawStrdup(setlocale(LC_ALL, NULL));
-    setlocale(LC_ALL, "");
-    for (i = 0; i < argc; i++) {
-        argv_copy2[i] = argv_copy[i] = gc(utf8toutf32(argv[i], -1, 0));
-    }
-    argv_copy2[argc] = argv_copy[argc] = NULL;
-    setlocale(LC_ALL, oldloc);
-    PyMem_RawFree(oldloc);
-    _PyRandom_Init();
-    Py_FrozenFlag++;
-    Py_NoSiteFlag++;
-    /* Py_VerboseFlag++; */
-    Py_NoUserSiteDirectory++;
-    Py_IgnoreEnvironmentFlag++;
-    Py_DontWriteBytecodeFlag++;
-    Py_Initialize();
-    Py_LimitedPath();
-    PySys_SetArgvEx(argc, argv_copy, 0);
-    res = LaunchModule(L(LAUNCH)) != 0;
-    _PyMem_SetupAllocators("malloc");
-    return res;
-}

third_party/python/Programs/repl.c

@@ -153,7 +153,7 @@ TerminalReadline(FILE *sys_stdin, FILE *sys_stdout, const char *prompt)
     PyOS_sighandler_t saint;
     saint = PyOS_setsig(SIGINT, OnKeyboardInterrupt);
     if (setjmp(jbuf)) {
-        linenoiseDisableRawMode(STDIN_FILENO);
+        linenoiseDisableRawMode();
         PyOS_setsig(SIGINT, saint);
         return NULL;
     }