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bpo-36471: Add _Py_RunMain() (GH-12618) 

* Add config_read_cmdline() subfunction. Remove _PyCmdline structure.
* _PyCoreConfig_Read() now also parses config->argv command line
  arguments
This commit is contained in:
Victor Stinner 2019-03-29 15:13:46 +01:00 committed by GitHub
parent 5f45979b63
commit 2f54908afc
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 156 additions and 118 deletions
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3
Include/cpython/pylifecycle.h
View File

@ -41,6 +41,9 @@ PyAPI_FUNC(_PyInitError) _Py_InitializeFromWideArgs(
int argc,
wchar_t **argv);
PyAPI_FUNC(int) _Py_RunMain(void);
PyAPI_FUNC(void) _Py_NO_RETURN _Py_ExitInitError(_PyInitError err);
/* Py_PyAtExit is for the atexit module, Py_AtExit is for low-level

13
Lib/test/test_embed.py
View File

@ -53,7 +53,12 @@ class EmbeddingTestsMixin:
stderr=subprocess.PIPE,
universal_newlines=True,
env=env)
try:
(out, err) = p.communicate()
except:
p.terminate()
p.wait()
raise
if p.returncode != 0 and support.verbose:
print(f"--- {cmd} failed ---")
print(f"stdout:\n{out}")
@ -254,6 +259,11 @@ class EmbeddingTests(EmbeddingTestsMixin, unittest.TestCase):
self.assertEqual(out.rstrip(), "Py_Main() after Py_Initialize: sys.argv=['-c', 'arg2']")
self.assertEqual(err, '')
def test_run_main(self):
out, err = self.run_embedded_interpreter("run_main")
self.assertEqual(out.rstrip(), "_Py_RunMain(): sys.argv=['-c', 'arg2']")
self.assertEqual(err, '')
class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
maxDiff = 4096
@ -549,10 +559,11 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
'pycache_prefix': 'conf_pycache_prefix',
'program_name': './conf_program_name',
'argv': ['-c', 'pass'],
'argv': ['-c', 'arg2'],
'program': 'conf_program',
'xoptions': ['core_xoption1=3', 'core_xoption2=', 'core_xoption3'],
'warnoptions': ['error::ResourceWarning', 'default::BytesWarning'],
'run_command': 'pass\n',
'site_import': 0,
'bytes_warning': 1,

34
Modules/main.c
View File

@ -567,20 +567,22 @@ exit_sigint(void)
}
static int
pymain_main(_PyArgv *args)
static void _Py_NO_RETURN
pymain_exit_error(_PyInitError err)
{
_PyInitError err;
err = pymain_init(args);
if (_Py_INIT_FAILED(err)) {
goto exit_init_error;
pymain_free();
_Py_ExitInitError(err);
}
int
_Py_RunMain(void)
{
int exitcode = 0;
err = pymain_run_python(&exitcode);
_PyInitError err = pymain_run_python(&exitcode);
if (_Py_INIT_FAILED(err)) {
goto exit_init_error;
pymain_exit_error(err);
}
if (Py_FinalizeEx() < 0) {
@ -596,10 +598,18 @@ pymain_main(_PyArgv *args)
}
return exitcode;
}
exit_init_error:
pymain_free();
_Py_ExitInitError(err);
static int
pymain_main(_PyArgv *args)
{
_PyInitError err = pymain_init(args);
if (_Py_INIT_FAILED(err)) {
pymain_exit_error(err);
}
return _Py_RunMain();
}

27
Programs/_testembed.c
View File

@ -447,9 +447,11 @@ static int test_init_from_config(void)
Py_SetProgramName(L"./globalvar");
config.program_name = L"./conf_program_name";
static wchar_t* argv[2] = {
static wchar_t* argv[] = {
L"python3",
L"-c",
L"pass",
L"arg2",
};
config.argv.length = Py_ARRAY_LENGTH(argv);
config.argv.items = argv;
@ -528,7 +530,6 @@ static int test_init_from_config(void)
config._frozen = 1;
err = _Py_InitializeFromConfig(&config);
/* Don't call _PyCoreConfig_Clear() since all strings are static */
if (_Py_INIT_FAILED(err)) {
_Py_ExitInitError(err);
}
@ -712,6 +713,27 @@ static int test_init_dev_mode(void)
}
static int test_run_main(void)
{
_PyCoreConfig config = _PyCoreConfig_INIT;
wchar_t *argv[] = {L"python3", L"-c",
(L"import sys; "
L"print(f'_Py_RunMain(): sys.argv={sys.argv}')"),
L"arg2"};
config.argv.length = Py_ARRAY_LENGTH(argv);
config.argv.items = argv;
config.program_name = L"./python3";
_PyInitError err = _Py_InitializeFromConfig(&config);
if (_Py_INIT_FAILED(err)) {
_Py_ExitInitError(err);
}
return _Py_RunMain();
}
/* *********************************************************
* List of test cases and the function that implements it.
*
@ -748,6 +770,7 @@ static struct TestCase TestCases[] = {
{ "init_isolated", test_init_isolated },
{ "preinit_isolated1", test_preinit_isolated1 },
{ "preinit_isolated2", test_preinit_isolated2 },
{ "run_main", test_run_main },
{ NULL, NULL }
};

195
Python/coreconfig.c
View File

@ -1618,33 +1618,34 @@ _PyCoreConfig_Write(const _PyCoreConfig *config)
}
/* --- _PyCmdline ------------------------------------------------- */
typedef struct {
_PyWstrList cmdline_warnoptions; /* Command line -W options */
_PyWstrList env_warnoptions; /* PYTHONWARNINGS environment variables */
int print_help; /* -h, -? options */
int print_version; /* -V option */
int need_usage;
} _PyCmdline;
/* --- _PyCoreConfig command line parser -------------------------- */
static void
cmdline_clear(_PyCmdline *cmdline)
config_usage(int error, const wchar_t* program)
{
_PyWstrList_Clear(&cmdline->cmdline_warnoptions);
_PyWstrList_Clear(&cmdline->env_warnoptions);
FILE *f = error ? stderr : stdout;
fprintf(f, usage_line, program);
if (error)
fprintf(f, "Try `python -h' for more information.\n");
else {
fputs(usage_1, f);
fputs(usage_2, f);
fputs(usage_3, f);
fprintf(f, usage_4, (wint_t)DELIM);
fprintf(f, usage_5, (wint_t)DELIM, PYTHONHOMEHELP);
fputs(usage_6, f);
}
}
/* --- _PyCoreConfig command line parser -------------------------- */
/* Parse the command line arguments */
static _PyInitError
config_parse_cmdline(_PyCoreConfig *config, _PyCmdline *cmdline,
_PyPreCmdline *precmdline)
config_parse_cmdline(_PyCoreConfig *config, _PyPreCmdline *precmdline,
_PyWstrList *warnoptions)
{
const _PyWstrList *argv = &precmdline->argv;
int print_version = 0;
_PyOS_ResetGetOpt();
do {
@ -1698,8 +1699,8 @@ config_parse_cmdline(_PyCoreConfig *config, _PyCmdline *cmdline,
} else {
fprintf(stderr, "--check-hash-based-pycs must be one of "
"'default', 'always', or 'never'\n");
cmdline->need_usage = 1;
return _Py_INIT_OK();
config_usage(1, config->program);
return _Py_INIT_EXIT(2);
}
break;
@ -1758,15 +1759,15 @@ config_parse_cmdline(_PyCoreConfig *config, _PyCmdline *cmdline,
case 'h':
case '?':
cmdline->print_help++;
break;
config_usage(0, config->program);
return _Py_INIT_EXIT(0);
case 'V':
cmdline->print_version++;
print_version++;
break;
case 'W':
if (_PyWstrList_Append(&cmdline->cmdline_warnoptions, _PyOS_optarg) < 0) {
if (_PyWstrList_Append(warnoptions, _PyOS_optarg) < 0) {
return _Py_INIT_NO_MEMORY();
}
break;
@ -1783,11 +1784,17 @@ config_parse_cmdline(_PyCoreConfig *config, _PyCmdline *cmdline,
default:
/* unknown argument: parsing failed */
cmdline->need_usage = 1;
return _Py_INIT_OK();
config_usage(1, config->program);
return _Py_INIT_EXIT(2);
}
} while (1);
if (print_version) {
printf("Python %s\n",
(print_version >= 2) ? Py_GetVersion() : PY_VERSION);
return _Py_INIT_EXIT(0);
}
if (config->run_command == NULL && config->run_module == NULL
&& _PyOS_optind < argv->length
&& wcscmp(argv->items[_PyOS_optind], L"-") != 0
@ -1819,7 +1826,7 @@ config_parse_cmdline(_PyCoreConfig *config, _PyCmdline *cmdline,
/* Get warning options from PYTHONWARNINGS environment variable. */
static _PyInitError
cmdline_init_env_warnoptions(_PyCmdline *cmdline, const _PyCoreConfig *config)
config_init_env_warnoptions(const _PyCoreConfig *config, _PyWstrList *warnoptions)
{
wchar_t *env;
int res = _PyCoreConfig_GetEnvDup(config, &env,
@ -1838,7 +1845,7 @@ cmdline_init_env_warnoptions(_PyCmdline *cmdline, const _PyCoreConfig *config)
warning != NULL;
warning = WCSTOK(NULL, L",", &context))
{
if (_PyWstrList_Append(&cmdline->env_warnoptions, warning) < 0) {
if (_PyWstrList_Append(warnoptions, warning) < 0) {
PyMem_RawFree(env);
return _Py_INIT_NO_MEMORY();
}
@ -1883,7 +1890,9 @@ config_add_warnoption(_PyCoreConfig *config, const wchar_t *option)
static _PyInitError
config_init_warnoptions(_PyCoreConfig *config, const _PyCmdline *cmdline)
config_init_warnoptions(_PyCoreConfig *config,
const _PyWstrList *cmdline_warnoptions,
const _PyWstrList *env_warnoptions)
{
/* The priority order for warnings configuration is (highest precedence
* first):
@ -1909,14 +1918,14 @@ config_init_warnoptions(_PyCoreConfig *config, const _PyCmdline *cmdline)
Py_ssize_t i;
const _PyWstrList *options;
options = &cmdline->env_warnoptions;
options = env_warnoptions;
for (i = 0; i < options->length; i++) {
if (config_add_warnoption(config, options->items[i]) < 0) {
return _Py_INIT_NO_MEMORY();
}
}
options = &cmdline->cmdline_warnoptions;
options = cmdline_warnoptions;
for (i = 0; i < options->length; i++) {
if (config_add_warnoption(config, options->items[i]) < 0) {
return _Py_INIT_NO_MEMORY();
@ -1992,36 +2001,14 @@ config_init_argv(_PyCoreConfig *config, const _PyPreCmdline *cmdline)
}
static void
config_usage(int error, const wchar_t* program)
{
FILE *f = error ? stderr : stdout;
fprintf(f, usage_line, program);
if (error)
fprintf(f, "Try `python -h' for more information.\n");
else {
fputs(usage_1, f);
fputs(usage_2, f);
fputs(usage_3, f);
fprintf(f, usage_4, (wint_t)DELIM);
fprintf(f, usage_5, (wint_t)DELIM, PYTHONHOMEHELP);
fputs(usage_6, f);
}
}
static _PyInitError
core_read_precmdline(_PyCoreConfig *config, const _PyArgv *args,
_PyPreCmdline *precmdline)
{
_PyInitError err;
if (args) {
err = _PyPreCmdline_SetArgv(precmdline, args);
if (_Py_INIT_FAILED(err)) {
return err;
}
if (_PyWstrList_Copy(&precmdline->argv, &config->argv) < 0) {
return _Py_INIT_NO_MEMORY();
}
_PyPreConfig preconfig = _PyPreConfig_INIT;
@ -2040,6 +2027,50 @@ done:
}
static _PyInitError
config_read_cmdline(_PyCoreConfig *config, _PyPreCmdline *precmdline)
{
_PyInitError err;
_PyWstrList cmdline_warnoptions = _PyWstrList_INIT;
_PyWstrList env_warnoptions = _PyWstrList_INIT;
err = config_parse_cmdline(config, precmdline, &cmdline_warnoptions);
if (_Py_INIT_FAILED(err)) {
goto done;
}
err = config_init_argv(config, precmdline);
if (_Py_INIT_FAILED(err)) {
goto done;
}
err = config_read(config, precmdline);
if (_Py_INIT_FAILED(err)) {
goto done;
}
if (config->use_environment) {
err = config_init_env_warnoptions(config, &env_warnoptions);
if (_Py_INIT_FAILED(err)) {
goto done;
}
}
err = config_init_warnoptions(config,
&cmdline_warnoptions, &env_warnoptions);
if (_Py_INIT_FAILED(err)) {
goto done;
}
err = _Py_INIT_OK();
done:
_PyWstrList_Clear(&cmdline_warnoptions);
_PyWstrList_Clear(&env_warnoptions);
return err;
}
/* Read the configuration into _PyCoreConfig from:
* Command line arguments
@ -2050,6 +2081,13 @@ _PyCoreConfig_Read(_PyCoreConfig *config, const _PyArgv *args)
{
_PyInitError err;
if (args) {
err = _PyArgv_AsWstrList(args, &config->argv);
if (_Py_INIT_FAILED(err)) {
return err;
}
}
err = _Py_PreInitializeFromCoreConfig(config);
if (_Py_INIT_FAILED(err)) {
return err;
@ -2070,53 +2108,7 @@ _PyCoreConfig_Read(_PyCoreConfig *config, const _PyArgv *args)
}
}
_PyCmdline cmdline;
memset(&cmdline, 0, sizeof(cmdline));
if (args) {
err = config_parse_cmdline(config, &cmdline, &precmdline);
if (_Py_INIT_FAILED(err)) {
goto done;
}
if (cmdline.need_usage) {
config_usage(1, config->program);
err = _Py_INIT_EXIT(2);
goto done;
}
if (cmdline.print_help) {
config_usage(0, config->program);
err = _Py_INIT_EXIT(0);
goto done;
}
if (cmdline.print_version) {
printf("Python %s\n",
(cmdline.print_version >= 2) ? Py_GetVersion() : PY_VERSION);
err = _Py_INIT_EXIT(0);
goto done;
}
err = config_init_argv(config, &precmdline);
if (_Py_INIT_FAILED(err)) {
goto done;
}
}
err = config_read(config, &precmdline);
if (_Py_INIT_FAILED(err)) {
goto done;
}
if (config->use_environment) {
err = cmdline_init_env_warnoptions(&cmdline, config);
if (_Py_INIT_FAILED(err)) {
goto done;
}
}
err = config_init_warnoptions(config, &cmdline);
err = config_read_cmdline(config, &precmdline);
if (_Py_INIT_FAILED(err)) {
goto done;
}
@ -2176,7 +2168,6 @@ _PyCoreConfig_Read(_PyCoreConfig *config, const _PyArgv *args)
err = _Py_INIT_OK();
done:
cmdline_clear(&cmdline);
_PyPreCmdline_Clear(&precmdline);
return err;
}