Georg Brandl added the comment:
Since the PEP is now withdrawn, I updated Neal's patch to the trunk and
added the env variable as well as the sys module value, including
documentation.
----------
priority: low -> normal
Added file: http://bugs.python.org/file8567/no-pyc-flag.diff
____________________________________
Tracker <[EMAIL PROTECTED]>
<http://bugs.python.org/issue602345>
____________________________________
Index: Python/pythonrun.c
===================================================================
--- Python/pythonrun.c (Revision 58468)
+++ Python/pythonrun.c (Arbeitskopie)
@@ -72,6 +72,7 @@
int Py_InteractiveFlag; /* Needed by Py_FdIsInteractive() below */
int Py_InspectFlag; /* Needed to determine whether to exit at SystemError */
int Py_NoSiteFlag; /* Suppress 'import site' */
+int Py_ReadOnlyBytecodeFlag; /* Suppress writing bytecode files (*.py[co]) */
int Py_UseClassExceptionsFlag = 1; /* Needed by bltinmodule.c: deprecated */
int Py_FrozenFlag; /* Needed by getpath.c */
int Py_UnicodeFlag = 0; /* Needed by compile.c */
@@ -172,6 +173,8 @@
Py_VerboseFlag = add_flag(Py_VerboseFlag, p);
if ((p = Py_GETENV("PYTHONOPTIMIZE")) && *p != '\0')
Py_OptimizeFlag = add_flag(Py_OptimizeFlag, p);
+ if ((p = Py_GETENV("PYTHONNOPYCFILES")) && *p != '\0')
+ Py_ReadOnlyBytecodeFlag = add_flag(Py_ReadOnlyBytecodeFlag, p);
interp = PyInterpreterState_New();
if (interp == NULL)
Index: Python/import.c
===================================================================
--- Python/import.c (Revision 58468)
+++ Python/import.c (Arbeitskopie)
@@ -951,8 +951,11 @@
if (Py_VerboseFlag)
PySys_WriteStderr("import %s # from %s\n",
name, pathname);
- if (cpathname)
- write_compiled_module(co, cpathname, mtime);
+ if (cpathname) {
+ PyObject *ro = PySys_GetObject("readonly_bytecode");
+ if (ro == NULL || !PyObject_IsTrue(ro))
+ write_compiled_module(co, cpathname, mtime);
+ }
}
m = PyImport_ExecCodeModuleEx(name, (PyObject *)co, pathname);
Py_DECREF(co);
Index: Python/sysmodule.c
===================================================================
--- Python/sysmodule.c (Revision 58468)
+++ Python/sysmodule.c (Arbeitskopie)
@@ -1128,6 +1128,9 @@
v = Py_BuildValue("(ssz)", "CPython", branch, svn_revision);
PyDict_SetItemString(sysdict, "subversion", v);
Py_XDECREF(v);
+ PyDict_SetItemString(sysdict, "readonly_bytecode",
+ v = PyBool_FromLong(Py_ReadOnlyBytecodeFlag));
+ Py_XDECREF(v);
/*
* These release level checks are mutually exclusive and cover
* the field, so don't get too fancy with the pre-processor!
Index: Include/pydebug.h
===================================================================
--- Include/pydebug.h (Revision 58468)
+++ Include/pydebug.h (Arbeitskopie)
@@ -17,6 +17,7 @@
PyAPI_DATA(int) Py_UnicodeFlag;
PyAPI_DATA(int) Py_IgnoreEnvironmentFlag;
PyAPI_DATA(int) Py_DivisionWarningFlag;
+PyAPI_DATA(int) Py_ReadOnlyBytecodeFlag;
/* _XXX Py_QnewFlag should go away in 3.0. It's true iff -Qnew is passed,
on the command line, and is used in 2.2 by ceval.c to make all "/" divisions
true divisions (which they will be in 3.0). */
Index: Doc/library/sys.rst
===================================================================
--- Doc/library/sys.rst (Revision 58468)
+++ Doc/library/sys.rst (Arbeitskopie)
@@ -457,6 +457,17 @@
implement a dynamic prompt.
+.. data:: readonly_bytecode
+
+ If this is true, Python won't try to write ``.pyc`` or ``.pyo`` files on the
+ import of source modules. This value is initially set to ``True`` or
``False``
+ depending on the ``-R`` command line option and the ``PYTHONNOPYCFILES``
+ environment variable, but you can set it yourself to control bytecode file
+ generation.
+
+ .. versionadded:: 2.6
+
+
.. function:: setcheckinterval(interval)
Set the interpreter's "check interval". This integer value determines how
often
Index: Modules/main.c
===================================================================
--- Modules/main.c (Revision 58468)
+++ Modules/main.c (Arbeitskopie)
@@ -40,7 +40,7 @@
static int orig_argc;
/* command line options */
-#define BASE_OPTS "3c:dEhim:OQ:StuUvVW:xX?"
+#define BASE_OPTS "3c:dEhim:OQ:RStuUvVW:xX?"
#ifndef RISCOS
#define PROGRAM_OPTS BASE_OPTS
@@ -71,27 +71,30 @@
-O : optimize generated bytecode slightly; also PYTHONOPTIMIZE=x\n\
-OO : remove doc-strings in addition to the -O optimizations\n\
-Q arg : division options: -Qold (default), -Qwarn, -Qwarnall, -Qnew\n\
+-R : don't write .py[co] files on import; also PYTHONNOPYCFILES=x\n\
-S : don't imply 'import site' on initialization\n\
-t : issue warnings about inconsistent tab usage (-tt: issue errors)\n\
--u : unbuffered binary stdout and stderr; also PYTHONUNBUFFERED=x\n\
";
static char *usage_3 = "\
+-u : unbuffered binary stdout and stderr; also PYTHONUNBUFFERED=x\n\
see man page for details on internal buffering relating to '-u'\n\
-v : verbose (trace import statements); also PYTHONVERBOSE=x\n\
can be supplied multiple times to increase verbosity\n\
-V : print the Python version number and exit (also --version)\n\
-W arg : warning control; arg is action:message:category:module:lineno\n\
-x : skip first line of source, allowing use of non-Unix forms of #!cmd\n\
+";
+static char *usage_4 = "\
-3 : warn about Python 3.x incompatibilities\n\
file : program read from script file\n\
- : program read from stdin (default; interactive mode if a tty)\n\
-";
-static char *usage_4 = "\
arg ...: arguments passed to program in sys.argv[1:]\n\n\
Other environment variables:\n\
PYTHONSTARTUP: file executed on interactive startup (no default)\n\
PYTHONPATH : '%c'-separated list of directories prefixed to the\n\
default module search path. The result is sys.path.\n\
+";
+static char *usage_5 = "\
PYTHONHOME : alternate <prefix> directory (or <prefix>%c<exec_prefix>).\n\
The default module search path uses %s.\n\
PYTHONCASEOK : ignore case in 'import' statements (Windows).\n\
@@ -110,7 +113,8 @@
fprintf(f, usage_1);
fprintf(f, usage_2);
fprintf(f, usage_3);
- fprintf(f, usage_4, DELIM, DELIM, PYTHONHOMEHELP);
+ fprintf(f, usage_4, DELIM);
+ fprintf(f, usage_5, DELIM, PYTHONHOMEHELP);
}
#if defined(__VMS)
if (exitcode == 0) {
@@ -307,6 +311,10 @@
Py_OptimizeFlag++;
break;
+ case 'R':
+ Py_ReadOnlyBytecodeFlag++;
+ break;
+
case 'S':
Py_NoSiteFlag++;
break;
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