Subversion Repositories c0or1k

#!/usr/bin/env python

"""

configtrans.py -- translate between CML1 and CML2 config formats.

This handles the impedance mismatch between CML2's explicit NAME=VALUE

output format and the formats expected by the Linux build machinery.

Note: it also makes backups whenever it touches a file.

configtrans.py -h includeout -s configout cml2file

configtrans.py -t <newconfig >oldconfig

"""

import sys, os, getopt, re

def linetrans(hook, instream, outstream, trailer=None):

    "Line-by-line translation between streams."

    if not hasattr(instream, "readline"):

        instream = open(instream, "r")

    if not hasattr(outstream, "readline"):

        outstream = open(outstream, "w")

    while 1:

        line = instream.readline()

        if not line:

            break

        new = hook(line)

        if new:

            outstream.write(new)

    instream.close()

    if trailer:

        outstream.write(trailer)

    outstream.close()

def write_include(line):

    "Transform a SYMBOL=VALUE line to CML1 include format."

    if line.find("PRIVATE") > -1 or line[:2] == "$$":

        return ""

    match = isnotset.match(line)

    if match:

        return "#undef  %s\n" % match.group(1)

    if line == "#\n":

        return None

    elif line[0] == "#":

        return "/* " + line[1:].strip() + " */\n"

    eq = line.find("=")

    if eq == -1:

        return line

    else:

        line = line.split('#')[0]

        symbol = line[:eq]

        value = line[eq+1 :].strip()

    if value == 'y':

        return "#define %s 1\n" % symbol

    elif value == 'm':

        return "#undef %s\n#define %s_MODULE 1\n" % (symbol, symbol)

    elif value == 'n':

        return "#undef  %s\n" % symbol

    else:

        return "#define %s %s\n" % (symbol, value)

def write_defconfig(line):

    "Transform a SYMBOL=VALUE line to CML1 defconfig format."

    if line[:2] == "$$":

        return ""

    eq = line.find("=")

    if eq == -1:

        return line

    else:

        line = line.split('#')[0]

        line = line.strip()

        if len(line) == 0 or line[-1] != "\n":

            line += "\n"

        symbol = line[:eq]

        value = line[eq+1:].strip()

    if value == 'n':

        return "# %s is not set\n" % symbol

    else:

        return line

def revert(line):

    "Translate a CML1 defconfig file to CML2 format."

    match = isnotset.match(line)

    if match:

        return "%s=n\n" % match.group(1)

    else:

        return line

if __name__ == '__main__':

    isnotset = re.compile("^# (.*) is not set")

    include = defconfig = translate = None

    (options, arguments) = getopt.getopt(sys.argv[1:], "h:s:t")

    for (switch, val) in options:

        if switch == '-h':

            includefile = val

            try:

                os.rename(val, val + ".old")

            except OSError:

                pass

        elif switch == '-s':

            defconfig = val

            try:

                os.rename(val, val + ".old")

            except OSError:

                pass

        elif switch == '-t':

            translate = 1

    if len(arguments) > 0:

        try:

            if includefile:

                linetrans(write_include, arguments[0], includefile, "#define AUTOCONF_INCLUDED\n")

            if defconfig:

                linetrans(write_defconfig, arguments[0], defconfig)

        except IOError, args:

            sys.stderr.write("configtrans: " + args[1] + "\n");

            raise SystemExit, 1

    elif translate:

        linetrans(revert, sys.stdin, sys.stdout)

    else:

        print "usage: configtrans.py -t [-h includefile] [-s defconfig] file"

        raise SystemExit, 1

# That's all, folks!