"""Module/script to "compile" all .py files to .pyc (or .pyo) file.

When called as a script with arguments, this compiles the directories
given as arguments recursively; the -l option prevents it from
recursing into directories.

Without arguments, if compiles all modules on sys.path, without
recursing into subdirectories.  (Even though it should do so for
packages -- for now, you'll have to deal with packages separately.)

See module py_compile for details of the actual byte-compilation.

"""

import os
import sys
import py_compile

def compile_dir(dir, maxlevels=10, ddir=None):
	"""Byte-compile all modules in the given directory tree.
 
	Arguments (only dir is required):
 
	dir:       the directory to byte-compile
	maxlevels: maximum recursion level (default 10)
	ddir:      if given, purported directory name (this is the
				directory name that will show up in error messages)
 
	"""
	print 'Listing', dir, '...'
	try:
		names = os.listdir(dir)
	except os.error:
		print "Can't list", dir
		names = []
	names.sort()
	for name in names:
		fullname = os.path.join(dir, name)
		if ddir:
			dfile = os.path.join(ddir, name)
		else:
			dfile = None
		if os.path.isfile(fullname):
			head, tail = name[:-3], name[-3:]
			if tail == '.py':
				print 'Compiling', fullname, '...'
				try:
					py_compile.compile(fullname, None, dfile)
				except KeyboardInterrupt:
					raise KeyboardInterrupt
				except:
					if type(sys.exc_type) == type(''):
						exc_type_name = sys.exc_type
					else: exc_type_name = sys.exc_type.__name__
					print 'Sorry:', exc_type_name + ':',
					print sys.exc_value
		elif maxlevels > 0 and \
				name != os.curdir and name != os.pardir and \
				os.path.isdir(fullname) and \
				not os.path.islink(fullname):
			compile_dir(fullname, maxlevels - 1, dfile)

def compile_path(skip_curdir=1, maxlevels=0):
	"""Byte-compile all module on sys.path.
 
	Arguments (all optional):
 
	skip_curdir: if true, skip current directory (default true)
	maxlevels:   max recursion level (default 0)
 
	"""
	for dir in sys.path:
		if (not dir or dir == os.curdir) and skip_curdir:
			print 'Skipping current directory'
		else:
			compile_dir(dir, maxlevels)

def main():
	"""Script main program."""
	import getopt
	try:
		opts, args = getopt.getopt(sys.argv[1:], 'ld:')
	except getopt.error, msg:
		print msg
		print "usage: compileall [-l] [-d destdir] [directory ...]"
		print "-l: don't recurse down"
		print "-d destdir: purported directory name for error messages"
		print "if no arguments, -l sys.path is assumed"
		sys.exit(2)
	maxlevels = 10
	ddir = None
	for o, a in opts:
		if o == '-l': maxlevels = 0
		if o == '-d': ddir = a
	if ddir:
		if len(args) != 1:
			print "-d destdir require exactly one directory argument"
			sys.exit(2)
	try:
		if args:
			for dir in args:
				compile_dir(dir, maxlevels, ddir)
		else:
			compile_path()
	except KeyboardInterrupt:
		print "\n[interrupt]"

if __name__ == '__main__':
	main()
