armerge

linux下的一款播放器

#!/usr/bin/env python
# -*- Mode: Python -*-
# 
# ***** BEGIN LICENSE BLOCK *****
# Source last modified: $Id: armerge,v 1.5 2004/07/07 22:00:03 hubbe Exp $
# 
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"""This utility is called by UNIX Makefiles to merge a bunch of static
libraries into one library; this makes it so we don't have to have .a's listed
in order, and sometimes multiple times when they have cyclic dependancies
I'm going to regret writing this, but hopefully I'll be gone before
I have to deal with the problems it creates. -Jay.
Heh, I'm definately not going to regret writing this -- somebody else
will!!!"""

import os
import sys
import string
import getopt
import glob

ar_cmd="ar"

def find_absolute_path(_path):
    old_dir = os.getcwd()
    
    (path, basename) = os.path.split(_path)
    if path:
        os.chdir(path)
        
    absolute_path = os.getcwd()

    os.chdir(old_dir)
    return os.path.join(absolute_path, basename)

def check_archives_exists(member_list):
    for member in member_list:
        if not os.path.isfile(member):
            print "archive=\"%s\" not found" % (member)
            sys.exit(1)

def mkdirhier(dir):
    if not dir or os.path.isdir(dir):
        return
    mkdirhier(os.path.dirname(dir))
    if not os.path.isdir(dir):
        os.mkdir(dir)


def use_tempdir(temp_dir):
    try:
        mkdirhier(temp_dir)
    except:
        pass

    if not os.path.isdir(temp_dir):
        print "cannot create temp directory=\"%s\"" % (temp_dir)
        sys.exit(1)

    os.chdir(temp_dir)

def unpack_member(member):
    (path, basename) = os.path.split(member)
    (base, ext) = os.path.splitext(basename)

    old_dir = os.getcwd()
    use_tempdir(base)

    os.system("%s x %s" % (ar_cmd, member))

    object_list = []
    for file in os.listdir(os.curdir):
        if file in [".", ".."]:
            continue
        
        mangled_name = "%s.%s" % (base, file)
        object_list.append(mangled_name)
        os.rename(file, os.path.join(os.pardir, mangled_name))
    
    os.chdir(old_dir)
    os.rmdir(base)
    return object_list

def ar_merge(archive, member_list, temp_dir):
    check_archives_exists(member_list)

    ## convert all paths to absolute paths
    archive = find_absolute_path(archive)
    for i in range(len(member_list)):
        member_list[i] = find_absolute_path(member_list[i])

    ## get rid of duplicates in the member list
    for member in member_list[:]:
        while member_list.count(member) > 1:
            member_list.remove(member)

    ## save old directory, change to temp dir
    old_dir = os.getcwd()
    if temp_dir:
        use_tempdir(temp_dir)

    object_list = []
    for member in member_list:
        object_list = object_list + unpack_member(member)
        
    ## make the new archive
    ## Keep the command-line length within acceptable limites
    xcmd = "%s scr %s" % (ar_cmd, archive)
    cmd = xcmd

    if os.name == "posix":
        maxCmdLineSize = 100000
    else:
        maxCmdLineSize = 4000
        
    for objName in object_list:
        if len(cmd) + len(objName) + 1 >= maxCmdLineSize:
            os.system(cmd)
            cmd = xcmd

        cmd = cmd + " " + objName

    os.system(cmd)

    ## remove all the archive members
    for object in object_list:
        try:
            os.remove(object)
        except:
            print "armerge: Failed to delete temporary object %s in %s." % (object, os.getcwd())
            sys.exit(1)

    os.chdir(old_dir)
    if temp_dir:
        os.rmdir(temp_dir)

def usage():
    print "armerge [-d temp_dir] [-a ar_cmd] <archive> member1 member2 ..."
    sys.exit(1)

def main():
    archive = ""
    member_list = []
    temp_dir = ""

    try:
        (opts, args) = getopt.getopt(sys.argv[1:], "d:a:")
    except getopt.error:
        usage()

    for (opt, opt_arg) in opts:
        if opt == "-d":
            temp_dir = opt_arg
        if opt == "-a":
            ar_cmd = opt_arg

    try:
        archive = args[0]
    except IndexError:
        usage()

    member_list = args[1:]
    
    ar_merge(archive, member_list, temp_dir)
    
    
if __name__ == "__main__":
    main()