Subversion Repositories HelenOS

#!/usr/bin/env python

#

# Copyright (c) 2006 Ondrej Palkovsky

# All rights reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

#

# - Redistributions of source code must retain the above copyright

#   notice, this list of conditions and the following disclaimer.

# - Redistributions in binary form must reproduce the above copyright

#   notice, this list of conditions and the following disclaimer in the

#   documentation and/or other materials provided with the distribution.

# - The name of the author may not be used to endorse or promote products

#   derived from this software without specific prior written permission.

#

# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#

"""

HelenOS configuration script

"""

import sys

import os

import re

import commands

INPUT = sys.argv[1]

OUTPUT = 'Makefile.config'

TMPOUTPUT = 'Makefile.config.tmp'

class DefaultDialog:

    "Wrapper dialog that tries to return default values"

    def __init__(self, dlg):

        self.dlg = dlg

    def set_title(self,text):

        self.dlg.set_title(text)

    def yesno(self, text, default=None):

        if default is not None:

            return default

        return self.dlg.yesno(text, default)

    def noyes(self, text, default=None):

        if default is not None:

            return default

        return self.dlg.noyes(text, default)

    def choice(self, text, choices, defopt=None):

        if defopt is not None:

            return choices[defopt][0]

        return self.dlg.choice(text, choices, defopt)

class NoDialog:

    def __init__(self):

        self.printed = None

        self.title = 'HelenOS Configuration'

    def print_title(self):

        if not self.printed:

            sys.stdout.write("\n*** %s ***\n" % self.title)

            self.printed = True

    def set_title(self, text):

        self.title = text

        self.printed = False

    def noyes(self, text, default=None):

        if not default:

            default = 'n'

        return self.yesno(text, default)

    def yesno(self, text, default=None):

        self.print_title()

        if default != 'n':

            default = 'y'

        while 1:

            sys.stdout.write("%s (y/n)[%s]: " % (text,default))

            inp = sys.stdin.readline()

            if not inp:

                raise EOFError

            inp = inp.strip().lower()

            if not inp:

                return default

            if inp == 'y':

                return 'y'

            elif inp == 'n':

                return 'n'

    def _print_choice(self, text, choices, defopt):

        sys.stdout.write('%s:\n' % text)

        for i,(text,descr) in enumerate(choices):

            if descr is '':

                sys.stdout.write('\t%2d. %s\n' % (i, text))

            else:

                sys.stdout.write('\t%2d. %s\n' % (i, descr))

        if defopt is not None:

            sys.stdout.write('Enter choice number[%d]: ' % defopt)

        else:

            sys.stdout.write('Enter choice number: ')

    def menu(self, text, choices, button, defopt=None):

        self.title = 'Main menu'

        menu = []

        for key, descr in choices:

            txt = key + (45-len(key))*' ' + ': ' + descr

            menu.append((key, txt))

        return self.choice(text, [button] + menu)

    def choice(self, text, choices, defopt=None):

        self.print_title()

        while 1:

            self._print_choice(text, choices, defopt)

            inp = sys.stdin.readline()

            if not inp:

                raise EOFError

            if not inp.strip():

                if defopt is not None:

                    return choices[defopt][0]

                continue

            try:

                number = int(inp.strip())

            except ValueError:

                continue

            if number < 0 or number >= len(choices):

                continue

            return choices[number][0]

def eof_checker(fnc):

    def wrapper(self, *args, **kw):

        try:

            return fnc(self, *args, **kw)

        except EOFError:

            return getattr(self.bckdialog,fnc.func_name)(*args, **kw)

    return wrapper

class Dialog(NoDialog):

    def __init__(self):

        NoDialog.__init__(self)

        self.dlgcmd = os.environ.get('DIALOG','dialog')

        self.title = ''

        self.backtitle = 'HelenOS Configuration'

        if os.system('%s --print-maxsize >/dev/null 2>&1' % self.dlgcmd) != 0:

            raise NotImplementedError

        self.bckdialog = NoDialog()

    def set_title(self,text):

        self.title = text

        self.bckdialog.set_title(text)

    def calldlg(self,*args,**kw):

        "Wrapper for calling 'dialog' program"

        indesc, outdesc = os.pipe()

        pid = os.fork()

        if not pid:

            os.close(2)

            os.dup(outdesc)

            os.close(indesc)

            dlgargs = [self.dlgcmd,'--title',self.title,

                       '--backtitle', self.backtitle]

            for key,val in kw.items():

                dlgargs.append('--'+key)

                dlgargs.append(val)

            dlgargs += args            

            os.execlp(self.dlgcmd,*dlgargs)

        os.close(outdesc)

        try:

            errout = os.fdopen(indesc,'r')

            data = errout.read()

            errout.close()

            pid,status = os.wait()

        except:

            os.system('reset') # Reset terminal

            raise

        if not os.WIFEXITED(status):

            os.system('reset') # Reset terminal

            raise EOFError

        status = os.WEXITSTATUS(status)

        if status == 255:

            raise EOFError

        return status,data

    def yesno(self, text, default=None):

        if text[-1] not in ('?',':'):

            text = text + ':'

        width = '50'

        height = '5'

        if len(text) < 48:

            text = ' '*int(((48-len(text))/2)) + text

        else:

            width = '0'

            height = '0'

        if default == 'n':

            res,data = self.calldlg('--defaultno','--yesno',text,height,width)

        else:

            res,data = self.calldlg('--yesno',text,height,width)

        if res == 0:

            return 'y'

        return 'n'

    yesno = eof_checker(yesno)

    def menu(self, text, choices, button, defopt=None):

        self.title = 'Main menu'

        text = text + ':'

        width = '70'

        height = str(8 + len(choices))

        args = []

        for key,val in choices:

            args.append(key)

            args.append(val)

        kw = {}

        if defopt:

            kw['default-item'] = choices[defopt][0] 

        res,data = self.calldlg('--ok-label','Change',

                                '--extra-label',button[1],

                                '--extra-button',

                                '--menu',text,height,width,

                                str(len(choices)),*args,**kw)

        if res == 3:

            return button[0]

        if res == 1: # Cancel

            sys.exit(1)

        elif res:

            print data

            raise EOFError

        return data

    menu = eof_checker(menu)

    def choice(self, text, choices, defopt=None):

        text = text + ':'

        width = '50'

        height = str(8 + len(choices))

        args = []

        for key,val in choices:

            args.append(key)

            args.append(val)

        kw = {}

        if defopt:

            kw['default-item'] = choices[defopt][0] 

        res,data = self.calldlg('--nocancel','--menu',text,height,width,

                                str(len(choices)),*args, **kw)

        if res:

            print data

            raise EOFError

        return data

    choice = eof_checker(choice)

def read_defaults(fname,defaults):

    "Read saved values from last configuration run"

    f = file(fname,'r')

    for line in f:

        res = re.match(r'^(?:#!# )?([^#]\w*)\s*=\s*(.*?)\s*$', line)

        if res:

            defaults[res.group(1)] = res.group(2)

    f.close()

def check_condition(text, defaults, asked_names):

    seen_vars = [ x[0] for x in asked_names ]

    ctype = 'cnf'

    if ')|' in text or '|(' in text:

        ctype = 'dnf'

    if ctype == 'cnf':

        conds = text.split('&')

    else:

        conds = text.split('|')

    for cond in conds:

        if cond.startswith('(') and cond.endswith(')'):

            cond = cond[1:-1]

        inside = check_inside(cond, defaults, ctype, seen_vars)

        if ctype == 'cnf' and not inside:

            return False

        if ctype == 'dnf' and inside:

            return True

    if ctype == 'cnf':

        return True

    return False

def check_inside(text, defaults, ctype, seen_vars):

    """

    Check that the condition specified on input line is True

    only CNF is supported

    """

    if ctype == 'cnf':

        conds = text.split('|')

    else:

        conds = text.split('&')

    for cond in conds:

        res = re.match(r'^(.*?)(!?=)(.*)$', cond)

        if not res:

            raise RuntimeError("Invalid condition: %s" % cond)

        condname = res.group(1)

        oper = res.group(2)

        condval = res.group(3)

        if condname not in seen_vars:

            varval = ''

##             raise RuntimeError("Variable %s not defined before being asked." %\

##                                condname)

        elif not defaults.has_key(condname):

            raise RuntimeError("Condition var %s does not exist: %s" % \

                               (condname,text))

        else:

            varval = defaults[condname]

        if ctype == 'cnf':

            if oper == '=' and  condval == varval:

                return True

            if oper == '!=' and condval != varval:

                return True

        else:

            if oper== '=' and condval != varval:

                return False

            if oper== '!=' and condval == varval:

                return False

    if ctype=='cnf':

        return False

    return True

def parse_config(input, output, dlg, defaults={}, askonly=None):

    "Parse configuration file and create Makefile.config on the fly"

    def ask_the_question(dialog):

        "Ask question based on the type of variables to ask"

        # This is quite a hack, this thingy is written just to

        # have access to local variables..

        if vartype == 'y/n':

            return dialog.yesno(comment, default)

        elif vartype == 'n/y':

            return dialog.noyes(comment, default)

        elif vartype == 'choice':

            defopt = None

            if default is not None:

                for i,(key,val) in enumerate(choices):

                    if key == default:

                        defopt = i

                        break

            return dialog.choice(comment, choices, defopt)

        else:

            raise RuntimeError("Bad method: %s" % vartype)

    f = file(input, 'r')

    outf = file(output, 'w')

    outf.write('#########################################\n')

    outf.write('## AUTO-GENERATED FILE, DO NOT EDIT!!! ##\n')

    outf.write('#########################################\n\n')

    asked_names = []

    comment = ''

    default = None

    choices = []

    for line in f:

        if line.startswith('%'):

            res = re.match(r'^%\s*(?:\[(.*?)\])?\s*(.*)$', line)

            if not res:

                raise RuntimeError('Invalid command: %s' % line)

            if res.group(1):

                if not check_condition(res.group(1), defaults,

                                       asked_names):

                    continue

            args = res.group(2).strip().split(' ')

            cmd = args[0].lower()

            args = args[1:]

            if cmd == 'saveas':

                outf.write('%s = %s\n' % (args[1],defaults[args[0]]))

            elif cmd == 'shellcmd':

                varname = args[0]

                args = args[1:]

                for i,arg in enumerate(args):

                    if arg.startswith('$'):

                        args[i] = defaults[arg[1:]]

                data,status = commands.getstatusoutput(' '.join(args))

                if status:

                    raise RuntimeError('Error running: %s' % ' '.join(args))

                outf.write('%s = %s\n' % (varname,data.strip()))

            continue

        if line.startswith('!'):

            # Ask a question

            res = re.search(r'!\s*(?:\[(.*?)\])?\s*([^\s]+)\s*\((.*)\)\s*$', line)

            if not res:

                raise RuntimeError("Weird line: %s" % line)

            varname = res.group(2)

            vartype = res.group(3)

            default = defaults.get(varname,None)

            if res.group(1):

                if not check_condition(res.group(1), defaults,

                                       asked_names):

                    if default is not None:

                        outf.write('#!# %s = %s\n' % (varname, default))

                    # Clear cumulated values

                    comment = ''

                    default = None

                    choices = []

                    continue

            asked_names.append((varname,comment))

            if default is None or not askonly or askonly == varname:

                default = ask_the_question(dlg)

            else:

                default = ask_the_question(DefaultDialog(dlg))

            outf.write('%s = %s\n' % (varname, default))

            # Remeber the selected value

            defaults[varname] = default

            # Clear cumulated values

            comment = ''

            default = None

            choices = []

            continue

        if line.startswith('@'):

            # Add new line into the 'choice array' 

            res = re.match(r'@\s*(?:\[(.*?)\])?\s*"(.*?)"\s*(.*)$', line)

            if not res:

                raise RuntimeError("Bad line: %s" % line)

            if res.group(1):

                if not check_condition(res.group(1),defaults,

                                       asked_names):

                    continue

            choices.append((res.group(2), res.group(3)))

            continue

        # All other things print to output file

        outf.write(line)

        if re.match(r'^#[^#]', line):

            # Last comment before question will be displayed to the user

            comment = line[1:].strip()

        elif line.startswith('## '):

            # Set title of the dialog window

            dlg.set_title(line[2:].strip())

    outf.write('\n')

    outf.write('REVISION = %s\n' % commands.getoutput('svnversion . 2> /dev/null'))

    outf.write('TIMESTAMP = %s\n' % commands.getoutput('date "+%Y-%m-%d %H:%M:%S"'))

    outf.close()

    f.close()

    return asked_names

def main():

    defaults = {}

    try:

        dlg = Dialog()

    except NotImplementedError:

        dlg = NoDialog()

    if len(sys.argv) >= 3 and sys.argv[2]=='default':

        defmode = True

    else:

        defmode = False

    # Default run will update the configuration file

    # with newest options

    if os.path.exists(OUTPUT):

        read_defaults(OUTPUT, defaults)

	# Get ARCH from command line if specified

    if len(sys.argv) >= 4:

        defaults['ARCH'] = sys.argv[3]

        defaults['PLATFORM'] = sys.argv[3]

	# Get COMPILER from command line if specified

    if len(sys.argv) >= 5:

        defaults['COMPILER'] = sys.argv[4]

	# Get CONFIG_DEBUG from command line if specified

    if len(sys.argv) >= 6:

        defaults['CONFIG_DEBUG'] = sys.argv[5]

	# Get MACHINE/IMAGE from command line if specified

    if len(sys.argv) >= 7:

        defaults['MACHINE'] = sys.argv[6]

        defaults['IMAGE'] = sys.argv[6]

    # Dry run only with defaults

    varnames = parse_config(INPUT, TMPOUTPUT, DefaultDialog(dlg), defaults)

    # If not in default mode, present selection of all possibilities

    if not defmode:

        defopt = 0

        while 1:

            # varnames contains variable names that were in the

            # last question set

            choices = [ (x[1],defaults[x[0]]) for x in varnames ]

            res = dlg.menu('Configuration',choices,('save','Save'),defopt)

            if res == 'save':

                parse_config(INPUT, TMPOUTPUT, DefaultDialog(dlg), defaults)

                break

            # transfer description back to varname

            for i,(vname,descr) in enumerate(varnames):

                if res == descr:

                    defopt = i

                    break

            # Ask the user a simple question, produce output

            # as if the user answered all the other questions

            # with default answer

            varnames = parse_config(INPUT, TMPOUTPUT, dlg, defaults,

                                    askonly=varnames[i][0])

    if os.path.exists(OUTPUT):

        os.unlink(OUTPUT)

    os.rename(TMPOUTPUT, OUTPUT)

    if not defmode and dlg.yesno('Rebuild everything?') == 'y':

        os.execlp('make','make','clean','build')

if __name__ == '__main__':

    main()