bpo-23427: Add sys.orig_argv attribute (GH-20729)

Add sys.orig_argv attribute: the list of the original command line
arguments passed to the Python executable.

Rename also PyConfig._orig_argv to PyConfig.orig_argv and
document it.

2 files changed, 9 insertions, 8 deletions

diff --git a/Python/initconfig.c b/Python/initconfig.c
index 9616945450..86285c77e2 100644
--- a/Python/initconfig.c
+++ b/Python/initconfig.c
@@ -601,7 +601,7 @@ PyConfig_Clear(PyConfig *config)
     CLEAR(config->run_filename);
     CLEAR(config->check_hash_pycs_mode);
 
-    _PyWideStringList_Clear(&config->_orig_argv);
+    _PyWideStringList_Clear(&config->orig_argv);
 #undef CLEAR
 }
 
@@ -856,7 +856,7 @@ _PyConfig_Copy(PyConfig *config, const PyConfig *config2)
     COPY_ATTR(pathconfig_warnings);
     COPY_ATTR(_init_main);
     COPY_ATTR(_isolated_interpreter);
-    COPY_WSTRLIST(_orig_argv);
+    COPY_WSTRLIST(orig_argv);
 
 #undef COPY_ATTR
 #undef COPY_WSTR_ATTR
@@ -957,7 +957,7 @@ config_as_dict(const PyConfig *config)
     SET_ITEM_INT(pathconfig_warnings);
     SET_ITEM_INT(_init_main);
     SET_ITEM_INT(_isolated_interpreter);
-    SET_ITEM_WSTRLIST(_orig_argv);
+    SET_ITEM_WSTRLIST(orig_argv);
 
     return dict;
 
@@ -1864,8 +1864,8 @@ _PyConfig_Write(const PyConfig *config, _PyRuntimeState *runtime)
     preconfig->use_environment = config->use_environment;
     preconfig->dev_mode = config->dev_mode;
 
-    if (_Py_SetArgcArgv(config->_orig_argv.length,
-                        config->_orig_argv.items) < 0)
+    if (_Py_SetArgcArgv(config->orig_argv.length,
+                        config->orig_argv.items) < 0)
     {
         return _PyStatus_NO_MEMORY();
     }
@@ -2501,11 +2501,11 @@ PyConfig_Read(PyConfig *config)
 
     config_get_global_vars(config);
 
-    if (config->_orig_argv.length == 0
+    if (config->orig_argv.length == 0
         && !(config->argv.length == 1
              && wcscmp(config->argv.items[0], L"") == 0))
     {
-        if (_PyWideStringList_Copy(&config->_orig_argv, &config->argv) < 0) {
+        if (_PyWideStringList_Copy(&config->orig_argv, &config->argv) < 0) {
             return _PyStatus_NO_MEMORY();
         }
     }
@@ -2589,7 +2589,7 @@ PyConfig_Read(PyConfig *config)
     assert(config->check_hash_pycs_mode != NULL);
     assert(config->_install_importlib >= 0);
     assert(config->pathconfig_warnings >= 0);
-    assert(_PyWideStringList_CheckConsistency(&config->_orig_argv));
+    assert(_PyWideStringList_CheckConsistency(&config->orig_argv));
 
     status = _PyStatus_OK();
 
diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index f3b5a6afdf..9fcdb5dbc4 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -2931,6 +2931,7 @@ _PySys_InitMain(PyThreadState *tstate)
     }
 
     COPY_LIST("argv", config->argv);
+    COPY_LIST("orig_argv", config->orig_argv);
     COPY_LIST("warnoptions", config->warnoptions);
 
     PyObject *xoptions = sys_create_xoptions_dict(config);