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"""Routine to "compile" a .py file to a .pyc (or .pyo) file.
This module has intimate knowledge of the format of .pyc files.
"""
import __builtin__
import imp
import marshal
import os
import sys
import traceback
MAGIC = imp.get_magic()
__all__ = ["compile", "main", "PyCompileError"]
class PyCompileError(Exception):
"""Exception raised when an error occurs while attempting to
compile the file.
To raise this exception, use
raise PyCompileError(exc_type,exc_value,file[,msg])
where
exc_type: exception type to be used in error message
type name can be accesses as class variable
'exc_type_name'
exc_value: exception value to be used in error message
can be accesses as class variable 'exc_value'
file: name of file being compiled to be used in error message
can be accesses as class variable 'file'
msg: string message to be written as error message
If no value is given, a default exception message will be given,
consistent with 'standard' py_compile output.
message (or default) can be accesses as class variable 'msg'
"""
def __init__(self, exc_type, exc_value, file, msg=''):
exc_type_name = exc_type.__name__
if exc_type is SyntaxError:
tbtext = ''.join(traceback.format_exception_only(exc_type, exc_value))
errmsg = tbtext.replace('File "<string>"', 'File "%s"' % file)
else:
errmsg = "Sorry: %s: %s" % (exc_type_name,exc_value)
Exception.__init__(self,msg or errmsg,exc_type_name,exc_value,file)
self.exc_type_name = exc_type_name
self.exc_value = exc_value
self.file = file
self.msg = msg or errmsg
def __str__(self):
return self.msg
def wr_long(f, x):
"""Internal; write a 32-bit int to a file in little-endian order."""
f.write(chr( x & 0xff))
f.write(chr((x >> 8) & 0xff))
f.write(chr((x >> 16) & 0xff))
f.write(chr((x >> 24) & 0xff))
def compile(file, cfile=None, dfile=None, doraise=False):
"""Does nothig on IronPython.
IronPython does not currently support compiling to .pyc
or any other format.
"""
return # not supported on IronPython, so return unconditionally
def main(args=None):
"""Compile several source files.
The files named in 'args' (or on the command line, if 'args' is
not specified) are compiled and the resulting bytecode is cached
in the normal manner. This function does not search a directory
structure to locate source files; it only compiles files named
explicitly. If '-' is the only parameter in args, the list of
files is taken from standard input.
"""
if args is None:
args = sys.argv[1:]
rv = 0
if args == ['-']:
while True:
filename = sys.stdin.readline()
if not filename:
break
filename = filename.rstrip('\n')
try:
compile(filename, doraise=True)
except PyCompileError as error:
rv = 1
sys.stderr.write("%s\n" % error.msg)
except IOError as error:
rv = 1
sys.stderr.write("%s\n" % error)
else:
for filename in args:
try:
compile(filename, doraise=True)
except PyCompileError as error:
# return value to indicate at least one failure
rv = 1
sys.stderr.write("%s\n" % error.msg)
return rv
if __name__ == "__main__":
sys.exit(main())
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