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Add global flag

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Pablo Galindo 2025-09-25 17:11:44 +01:00 • committed by Dino Viehland
parent 44a3e46770
commit 73de8d0928
4 changed files with 79 additions and 1 deletions
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60
Python/initconfig.c
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@ -111,6 +111,7 @@ static const PyConfigSpec PYCONFIG_SPEC[] = {
SPEC(base_prefix, WSTR_OPT, PUBLIC, SYS_ATTR("base_prefix")),
SPEC(bytes_warning, UINT, PUBLIC, SYS_FLAG(9)),
SPEC(cpu_count, INT, PUBLIC, NO_SYS),
SPEC(lazy_imports, INT, PUBLIC, NO_SYS),
SPEC(exec_prefix, WSTR_OPT, PUBLIC, SYS_ATTR("exec_prefix")),
SPEC(executable, WSTR_OPT, PUBLIC, SYS_ATTR("executable")),
SPEC(inspect, BOOL, PUBLIC, SYS_FLAG(1)),
@ -317,6 +318,8 @@ The following implementation-specific options are available:\n\
"\
-X importtime[=2]: show how long each import takes; use -X importtime=2 to\n\
log imports of already-loaded modules; also PYTHONPROFILEIMPORTTIME\n\
-X lazy_imports=[on|off|default]: control global lazy imports; default is auto;\n\
also PYTHON_LAZY_IMPORTS\n\
-X int_max_str_digits=N: limit the size of int<->str conversions;\n\
0 disables the limit; also PYTHONINTMAXSTRDIGITS\n\
-X no_debug_ranges: don't include extra location information in code objects;\n\
@ -431,6 +434,7 @@ static const char usage_envvars[] =
"PYTHON_PRESITE: import this module before site (-X presite)\n"
#endif
"PYTHONPROFILEIMPORTTIME: show how long each import takes (-X importtime)\n"
"PYTHON_LAZY_IMPORTS: control global lazy imports (-X lazy_imports)\n"
"PYTHONPYCACHEPREFIX: root directory for bytecode cache (pyc) files\n"
" (-X pycache_prefix)\n"
"PYTHONSAFEPATH : don't prepend a potentially unsafe path to sys.path.\n"
@ -939,6 +943,8 @@ config_check_consistency(const PyConfig *config)
assert(config->int_max_str_digits >= 0);
// cpu_count can be -1 if the user doesn't override it.
assert(config->cpu_count != 0);
// lazy_imports can be -1 (default), 0 (off), or 1 (on).
assert(config->lazy_imports >= -1 && config->lazy_imports <= 1);
// config->use_frozen_modules is initialized later
// by _PyConfig_InitImportConfig().
assert(config->thread_inherit_context >= 0);
@ -1050,6 +1056,7 @@ _PyConfig_InitCompatConfig(PyConfig *config)
config->_is_python_build = 0;
config->code_debug_ranges = 1;
config->cpu_count = -1;
config->lazy_imports = -1;
#ifdef Py_GIL_DISABLED
config->thread_inherit_context = 1;
config->context_aware_warnings = 1;
@ -2284,6 +2291,49 @@ config_init_import_time(PyConfig *config)
return _PyStatus_OK();
}
static PyStatus
config_init_lazy_imports(PyConfig *config)
{
int lazy_imports = -1;
const char *env = config_get_env(config, "PYTHON_LAZY_IMPORTS");
if (env) {
if (strcmp(env, "on") == 0) {
lazy_imports = 1;
}
else if (strcmp(env, "off") == 0) {
lazy_imports = 0;
}
else if (strcmp(env, "default") == 0) {
lazy_imports = -1;
}
else {
return _PyStatus_ERR("PYTHON_LAZY_IMPORTS: invalid value; "
"expected 'on', 'off', or 'default'");
}
config->lazy_imports = lazy_imports;
}
const wchar_t *x_value = config_get_xoption_value(config, L"lazy_imports");
if (x_value) {
if (wcscmp(x_value, L"on") == 0) {
lazy_imports = 1;
}
else if (wcscmp(x_value, L"off") == 0) {
lazy_imports = 0;
}
else if (wcscmp(x_value, L"default") == 0) {
lazy_imports = -1;
}
else {
return _PyStatus_ERR("-X lazy_imports: invalid value; "
"expected 'on', 'off', or 'default'");
}
config->lazy_imports = lazy_imports;
}
return _PyStatus_OK();
}
static PyStatus
config_read_complex_options(PyConfig *config)
{
@ -2307,6 +2357,13 @@ config_read_complex_options(PyConfig *config)
}
}
if (config->lazy_imports < 0) {
status = config_init_lazy_imports(config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
}
if (config->tracemalloc < 0) {
status = config_init_tracemalloc(config);
if (_PyStatus_EXCEPTION(status)) {
@ -2696,6 +2753,9 @@ config_read(PyConfig *config, int compute_path_config)
if (config->tracemalloc < 0) {
config->tracemalloc = 0;
}
if (config->lazy_imports < 0) {
config->lazy_imports = -1; // Default is auto/unset
}
if (config->perf_profiling < 0) {
config->perf_profiling = 0;
}