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bpo-34725: Adds _Py_SetProgramFullPath so embedders may override sys.executable (GH-9860)

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Steve Dower 2018-11-17 20:41:48 -08:00 committed by GitHub
parent 689d555ec1
commit 177a41a07b
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GPG key ID: 4AEE18F83AFDEB23
6 changed files with 74 additions and 33 deletions
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3
Include/internal/pycore_pathconfig.h
View file

@ -26,10 +26,9 @@ typedef struct _PyPathConfig {
/* Full path to the Python program */
wchar_t *program_full_path;
wchar_t *prefix;
wchar_t *exec_prefix;
#ifdef MS_WINDOWS
wchar_t *dll_path;
#else
wchar_t *exec_prefix;
#endif
/* Set by Py_SetPath(), or computed by _PyPathConfig_Init() */
wchar_t *module_search_path;

18
Include/pylifecycle.h
View file

@ -7,12 +7,6 @@
extern "C" {
#endif
PyAPI_FUNC(void) Py_SetProgramName(const wchar_t *);
PyAPI_FUNC(wchar_t *) Py_GetProgramName(void);
PyAPI_FUNC(void) Py_SetPythonHome(const wchar_t *);
PyAPI_FUNC(wchar_t *) Py_GetPythonHome(void);
#ifndef Py_LIMITED_API
/* Only used by applications that embed the interpreter and need to
* override the standard encoding determination mechanism
@ -83,8 +77,18 @@ PyAPI_FUNC(int) Py_FdIsInteractive(FILE *, const char *);
/* Bootstrap __main__ (defined in Modules/main.c) */
PyAPI_FUNC(int) Py_Main(int argc, wchar_t **argv);
/* In getpath.c */
/* In pathconfig.c */
PyAPI_FUNC(void) Py_SetProgramName(const wchar_t *);
PyAPI_FUNC(wchar_t *) Py_GetProgramName(void);
PyAPI_FUNC(void) Py_SetPythonHome(const wchar_t *);
PyAPI_FUNC(wchar_t *) Py_GetPythonHome(void);
#ifndef Py_LIMITED_API
PyAPI_FUNC(void) _Py_SetProgramFullPath(const wchar_t *);
#endif
PyAPI_FUNC(wchar_t *) Py_GetProgramFullPath(void);
PyAPI_FUNC(wchar_t *) Py_GetPrefix(void);
PyAPI_FUNC(wchar_t *) Py_GetExecPrefix(void);
PyAPI_FUNC(wchar_t *) Py_GetPath(void);

1
Misc/NEWS.d/next/C API/2018-10-13-16-30-54.bpo-34725.j52rIS.rst Normal file
View file

@ -0,0 +1 @@
Adds _Py_SetProgramFullPath so embedders may override sys.executable

4
PC/getpathp.c
View file

@ -982,6 +982,10 @@ calculate_path_impl(const _PyCoreConfig *core_config,
if (config->prefix == NULL) {
return _Py_INIT_NO_MEMORY();
}
config->exec_prefix = _PyMem_RawWcsdup(prefix);
if (config->exec_prefix == NULL) {
return _Py_INIT_NO_MEMORY();
}
return _Py_INIT_OK();
}

24
Python/coreconfig.c
View file

@ -662,6 +662,23 @@ config_init_program_name(_PyCoreConfig *config)
return _Py_INIT_OK();
}
static _PyInitError
config_init_executable(_PyCoreConfig *config)
{
assert(config->executable == NULL);
/* If Py_SetProgramFullPath() was called, use its value */
const wchar_t *program_full_path = _Py_path_config.program_full_path;
if (program_full_path != NULL) {
config->executable = _PyMem_RawWcsdup(program_full_path);
if (config->executable == NULL) {
return _Py_INIT_NO_MEMORY();
}
return _Py_INIT_OK();
}
return _Py_INIT_OK();
}
static const wchar_t*
config_get_xoption(const _PyCoreConfig *config, wchar_t *name)
@ -1370,6 +1387,13 @@ _PyCoreConfig_Read(_PyCoreConfig *config)
}
}
if (config->executable == NULL) {
err = config_init_executable(config);
if (_Py_INIT_FAILED(err)) {
return err;
}
}
if (config->utf8_mode < 0 || config->coerce_c_locale < 0) {
config_init_locale(config);
}

57
Python/pathconfig.c
View file

@ -49,10 +49,9 @@ _PyPathConfig_Clear(_PyPathConfig *config)
CLEAR(config->prefix);
CLEAR(config->program_full_path);
CLEAR(config->exec_prefix);
#ifdef MS_WINDOWS
CLEAR(config->dll_path);
#else
CLEAR(config->exec_prefix);
#endif
CLEAR(config->module_search_path);
CLEAR(config->home);
@ -74,8 +73,8 @@ _PyPathConfig_Calculate(_PyPathConfig *path_config,
PyMemAllocatorEx old_alloc;
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
/* Calculate program_full_path, prefix, exec_prefix (Unix)
or dll_path (Windows), and module_search_path */
/* Calculate program_full_path, prefix, exec_prefix,
dll_path (Windows), and module_search_path */
err = _PyPathConfig_Calculate_impl(&new_config, core_config);
if (_Py_INIT_FAILED(err)) {
goto err;
@ -126,10 +125,9 @@ _PyPathConfig_SetGlobal(const _PyPathConfig *config)
COPY_ATTR(program_full_path);
COPY_ATTR(prefix);
COPY_ATTR(exec_prefix);
#ifdef MS_WINDOWS
COPY_ATTR(dll_path);
#else
COPY_ATTR(exec_prefix);
#endif
COPY_ATTR(module_search_path);
COPY_ATTR(program_name);
@ -208,12 +206,11 @@ _PyCoreConfig_SetPathConfig(const _PyCoreConfig *core_config)
if (copy_wstr(&path_config.prefix, core_config->prefix) < 0) {
goto no_memory;
}
#ifdef MS_WINDOWS
if (copy_wstr(&path_config.dll_path, core_config->dll_path) < 0) {
if (copy_wstr(&path_config.exec_prefix, core_config->exec_prefix) < 0) {
goto no_memory;
}
#else
if (copy_wstr(&path_config.exec_prefix, core_config->exec_prefix) < 0) {
#ifdef MS_WINDOWS
if (copy_wstr(&path_config.dll_path, core_config->dll_path) < 0) {
goto no_memory;
}
#endif
@ -317,12 +314,8 @@ _PyCoreConfig_CalculatePathConfig(_PyCoreConfig *config)
}
if (config->exec_prefix == NULL) {
#ifdef MS_WINDOWS
wchar_t *exec_prefix = path_config.prefix;
#else
wchar_t *exec_prefix = path_config.exec_prefix;
#endif
if (copy_wstr(&config->exec_prefix, exec_prefix) < 0) {
if (copy_wstr(&config->exec_prefix,
path_config.exec_prefix) < 0) {
goto no_memory;
}
}
@ -379,7 +372,8 @@ _PyCoreConfig_InitPathConfig(_PyCoreConfig *config)
}
if (config->base_exec_prefix == NULL) {
if (copy_wstr(&config->base_exec_prefix, config->exec_prefix) < 0) {
if (copy_wstr(&config->base_exec_prefix,
config->exec_prefix) < 0) {
return _Py_INIT_NO_MEMORY();
}
}
@ -435,12 +429,11 @@ Py_SetPath(const wchar_t *path)
int alloc_error = (new_config.program_full_path == NULL);
new_config.prefix = _PyMem_RawWcsdup(L"");
alloc_error |= (new_config.prefix == NULL);
new_config.exec_prefix = _PyMem_RawWcsdup(L"");
alloc_error |= (new_config.exec_prefix == NULL);
#ifdef MS_WINDOWS
new_config.dll_path = _PyMem_RawWcsdup(L"");
alloc_error |= (new_config.dll_path == NULL);
#else
new_config.exec_prefix = _PyMem_RawWcsdup(L"");
alloc_error |= (new_config.exec_prefix == NULL);
#endif
new_config.module_search_path = _PyMem_RawWcsdup(path);
alloc_error |= (new_config.module_search_path == NULL);
@ -503,6 +496,26 @@ Py_SetProgramName(const wchar_t *program_name)
}
}
void
_Py_SetProgramFullPath(const wchar_t *program_full_path)
{
if (program_full_path == NULL || program_full_path[0] == L'\0') {
return;
}
PyMemAllocatorEx old_alloc;
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
PyMem_RawFree(_Py_path_config.program_full_path);
_Py_path_config.program_full_path = _PyMem_RawWcsdup(program_full_path);
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
if (_Py_path_config.program_full_path == NULL) {
Py_FatalError("_Py_SetProgramFullPath() failed: out of memory");
}
}
wchar_t *
Py_GetPath(void)
@ -523,12 +536,8 @@ Py_GetPrefix(void)
wchar_t *
Py_GetExecPrefix(void)
{
#ifdef MS_WINDOWS
return Py_GetPrefix();
#else
pathconfig_global_init();
return _Py_path_config.exec_prefix;
#endif
}