"""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()