~drizzle-trunk/drizzle/development

#!/usr/bin/python

#  Copyright (C) 2009 Sun Microsystems

#

#  This program is free software; you can redistribute it and/or modify

#  it under the terms of the GNU General Public License as published by

#  the Free Software Foundation; version 2 of the License.

#

#  This program is distributed in the hope that it will be useful,

#  but WITHOUT ANY WARRANTY; without even the implied warranty of

#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

#  GNU General Public License for more details.

#

#  You should have received a copy of the GNU General Public License

#  along with this program; if not, write to the Free Software

#  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

pandora_plugin_file = 'config/pandora-plugin.ini'

# Find plugins in the tree and add them to the build system

import ConfigParser, os, sys

import datetime, time

import subprocess

plugin_am_file=None

plugin_ac_file=None

class ChangeProtectedFile(object):

  def __init__(self, fname):

    self.bogus_file= False

    self.real_fname= fname

    self.new_fname= "%s.new" % fname

    try:

      self.new_file= open(self.new_fname,'w+')

    except IOError:

      self.bogus_file= True

  def write(self, text):

    if not self.bogus_file:

      self.new_file.write(text)

  # We've written all of this out into .new files, now we only copy them

  # over the old ones if they are different, so that we don't cause

  # unnecessary recompiles

  def close(self):

    """Return True if the file had changed."""

    if self.bogus_file:

      return

    self.new_file.seek(0)

    new_content = self.new_file.read()

    self.new_file.close()

    try:

        old_file = file(self.real_fname, 'r')

        old_content = old_file.read()

        old_file.close()

    except IOError:

        old_content = None

    if new_content != old_content:

      if old_content != None:

        os.unlink(self.real_fname)

      os.rename(self.new_fname, self.real_fname)

      return True

    else:

        try:

          os.unlink(self.new_fname)

        except:

          pass

def write_external_configure(plugin, plugin_file):

  """Write the initial bits of the configure.ac file"""

  if not os.path.exists('m4'):

    os.mkdir('m4')

  plugin_file.write("""

AC_PREREQ(2.59)dnl		Minimum Autoconf version required.

AC_INIT([%(name)s],[%(version)s],[%(url)s])

AC_CONFIG_SRCDIR([%(main_source)s])

AC_CONFIG_AUX_DIR(config)

PANDORA_CANONICAL_TARGET(less-warnings, warnings-always-on, require-cxx, force-gcc42,skip-visibility)

PANDORA_REQUIRE_LIBPROTOBUF

PANDORA_PROTOBUF_REQUIRE_VERSION([2.1.0])

PANDORA_REQUIRE_PROTOC

AC_LANG_PUSH(C++)

PANDORA_REQUIRE_PTHREAD

PANDORA_REQUIRE_LIBDL

AC_LANG_POP

PANDORA_USE_BETTER_MALLOC

PANDORA_DRIZZLE_BUILD

""" % plugin)

  write_plugin_ac(plugin, plugin_file)

  plugin_file.write("""

AC_CONFIG_FILES(Makefile)

AC_OUTPUT

echo "---"

echo "Configuration summary for $PACKAGE_NAME version $VERSION $PANDORA_RELEASE_COMMENT"

echo ""

echo "   * Installation prefix:       $prefix"

echo "   * System type:               $host_vendor-$host_os"

echo "   * Host CPU:                  $host_cpu"

echo "   * C Compiler:                $CC_VERSION"

echo "   * C++ Compiler:              $CXX_VERSION"

echo "   * Debug enabled:             $with_debug"

echo "   * Warnings as failure:       $ac_cv_warnings_as_errors"

echo "   * C++ cstdint location:      $ac_cv_cxx_cstdint"

echo "   * C++ hash_map location:     $ac_cv_cxx_hash_map"

echo "   * C++ hash namespace:        $ac_cv_cxx_hash_namespace"

echo "   * C++ shared_ptr namespace:  $ac_cv_shared_ptr_namespace"

echo ""

echo "---"

  """ % plugin)

def write_external_makefile(plugin, plugin_file):

  plugin_file.write("""

ACLOCAL_AMFLAGS = -I m4 --force

VERSION=$(PANDORA_RELEASE_VERSION)

pkgplugindir=%(pkgplugindir)s

EXTRA_DIST = plugin.ini

""" % plugin)

  if plugin['headers'] != "":

    plugin_file.write("noinst_HEADERS = %(headers)s\n" % plugin)

  if plugin['install_headers'] != "":

    plugin_file.write("nobase_include_HEADERS += %(install_headers)s\n" % plugin)

  if plugin['testsuite']:

    if plugin.has_key('testsuitedir') and plugin['testsuitedir'] != "":

      plugin_file.write("EXTRA_DIST += %(testsuitedir)s\n" % plugin)

  plugin_file.write("""

pkgplugin_LTLIBRARIES=%(libname)s.la

%(libname)s_la_LDFLAGS=-avoid-version -rpath $(pkgplugindir) $(AM_LDFLAGS) %(ldflags)s $(GCOV_LIBS)

%(libname)s_la_LIBADD=%(libs)s

%(libname)s_la_DEPENDENCIES=%(libs)s

%(libname)s_la_CPPFLAGS=$(AM_CPPFLAGS) -DPANDORA_DYNAMIC_PLUGIN -DPANDORA_MODULE_NAME=%(module_name)s -DPANDORA_MODULE_AUTHOR='"%(author)s"' -DPANDORA_MODULE_TITLE='"%(title)s"' -DPANDORA_MODULE_VERSION='"%(version)s"' -DPANDORA_MODULE_LICENSE=%(license)s %(cppflags)s

%(libname)s_la_CXXFLAGS=$(AM_CXXFLAGS) %(cxxflags)s

%(libname)s_la_CFLAGS=$(AM_CFLAGS) %(cflags)s

%(libname)s_la_SOURCES=%(sources)s

check_PROGRAMS += %(tests)s

""" % plugin)

  plugin_am_file=os.path.join(plugin['rel_path'],'plugin.am')

  if os.path.exists(plugin_am_file):

    plugin_file.write('include %s\n' % plugin_am_file)

def write_external_plugin():

  """Return True if the plugin had changed."""

  plugin = read_plugin_ini('.')

  expand_plugin_ini(plugin)

  plugin_file = ChangeProtectedFile('configure.ac')

  write_external_configure(plugin, plugin_file)

  result = plugin_file.close()

  plugin_file = ChangeProtectedFile('Makefile.am')

  write_external_makefile(plugin, plugin_file)

  # Write some stub configure.ac and Makefile.am files that include the above

  result = plugin_file.close() or result

  return result

def write_plugin(plugin, plugin_ini_list):

  # Since this function is recursive, make sure we're not already in it.

  if plugin.has_key('writing_status'):

    if plugin['writing_status'] == 'done':

      return

    else:

      print "Dependency loop detected with %s" % plugin['name']

      exit(1)

  plugin['writing_status'] = 'dependencies'

  # Write all dependencies first to get around annoying automake bug

  for dependency in plugin['dependency_list']:

    found = False

    for find_plugin in plugin_ini_list:

      if find_plugin['module_name'] == dependency:

        found = True

        write_plugin(find_plugin, plugin_ini_list)

        break

    if found is False:

      print "Could not find dependency %s: %s" % (plugin['name'], dependency)

      exit(1)

  write_plugin_ac(plugin, plugin_ac_file)

  write_plugin_am(plugin, plugin_am_file)

  plugin['writing_status'] = 'done'

def write_plugin_ac(plugin, plugin_ac):

  #

  # Write plugin config instructions into plugin.ac file.

  #

  plugin_ac_file=os.path.join(plugin['rel_path'],'plugin.ac')

  plugin_m4_dir=os.path.join(plugin['rel_path'],'m4')

  plugin_m4_files=[]

  if os.path.exists(plugin_m4_dir) and os.path.isdir(plugin_m4_dir):

    for m4_file in os.listdir(plugin_m4_dir):

      if os.path.splitext(m4_file)[-1] == '.m4':

        plugin_m4_files.append(os.path.join(plugin['rel_path'], m4_file))

  plugin_ac.write("""

dnl Config for %(title)s

""" % plugin)

  for m4_file in plugin_m4_files:

    plugin_ac.write('m4_sinclude([%s])\n' % m4_file)

  plugin['plugin_dep_libs']=" ".join(["\${top_builddir}/%s" % f for f in plugin['libs'].split()])

  plugin_ac.write("""

AC_ARG_WITH([%(name_with_dashes)s-plugin],[

dnl indented wierd to make the help output correct

AS_HELP_STRING([--with-%(name_with_dashes)s-plugin],[Build %(title)s. @<:@default=%(enabled)s@:>@])

AS_HELP_STRING([--without-%(name_with_dashes)s-plugin],[Disable building %(title)s])

  ],[

    with_%(name)s_plugin="$withval"

    AS_IF([test "x$with_%(name)s_plugin" = "xyes"],[

      requested_%(name)s_plugin="yes"

    ],[

      requested_%(name)s_plugin="no"

    ])

  ],[

    with_%(name)s_plugin="%(enabled)s"

    requested_%(name)s_plugin="no"

  ])

AC_ARG_ENABLE([%(name_with_dashes)s-plugin],[

dnl indented wierd to make the help output correct

AS_HELP_STRING([--enable-%(name_with_dashes)s-plugin],[Build %(title)s. @<:@default=%(default_yesno)s@:>@])

AS_HELP_STRING([--disable-%(name_with_dashes)s-plugin],[Disable building %(title)s])

  ],

  [enable_%(name)s_plugin="$enableval"],

  [enable_%(name)s_plugin=%(default_yesno)s])

""" % plugin)

  if os.path.exists(plugin_ac_file):

    plugin_ac.write('m4_sinclude([%s])\n' % plugin_ac_file)

  # The plugin author has specified some check to make to determine

  # if the plugin can be built. If the plugin is turned on and this

  # check fails, then configure should error out. If the plugin is not

  # turned on, then the normal conditional build stuff should just let

  # it silently not build

  if plugin['has_build_conditional']:

    plugin_ac.write("""

AS_IF([test %(build_conditional)s],

      [], dnl build_conditional can only negate

      [

        AS_IF([test "x${requested_%(name)s_plugin}" = "xyes"],

              [AC_MSG_ERROR([Plugin %(name)s was explicitly requested, yet failed build dependency checks. Aborting!])])

        with_%(name)s_plugin=no

      ])

""" % plugin)

  if not plugin['unconditional']:

    plugin_ac.write("""

AM_CONDITIONAL([%(build_conditional_tag)s],

               [test %(build_conditional)s])

    """ % plugin)

  plugin_ac.write("""

AS_IF([test "x$with_%(name)s_plugin" = "xyes"],

    [

""" % plugin)

  if plugin['testsuite']:

    plugin_ac.write("""

      pandora_plugin_test_list="%(name)s,${pandora_plugin_test_list}"

    """ % plugin)

  if plugin['static']:

    plugin_ac.write("""

        AS_IF([test "x$enable_%(name)s_plugin" = "xyes"],[

          pandora_builtin_list="%(module_name)s,${pandora_builtin_list}"

          pandora_builtin_symbols_list="_drizzled_%(module_name)s_plugin_,${pandora_builtin_symbols_list}"

          pandora_plugin_libs="${pandora_plugin_libs} \${top_builddir}/%(root_plugin_dir)s/%(libname)s.la"

          PANDORA_PLUGIN_DEP_LIBS="${PANDORA_PLUGIN_DEP_LIBS} %(plugin_dep_libs)s"

        ])

    """ % plugin)

  else:

    plugin_ac.write("""

        AS_IF([test "x$enable_%(name)s_plugin" = "xyes"],[

          pandora_default_plugin_list="%(name)s,${pandora_default_plugin_list}"

        ])

    """ % plugin)

  plugin_ac.write("      ])\n")

def fix_file_paths(plugin, files):

  # TODO: determine path to plugin dir relative to top_srcdir... append it to

  # source files if they don't already have it

  new_files=""

  if plugin['plugin_dir'] != ".":

    for file in files.split():

      if not file.startswith(plugin['rel_path']):

        file= os.path.join(plugin['rel_path'], file)

        new_files= "%s %s" % (new_files, file)

  else:

    new_files= " ".join(plugin['sources'].split())

  if new_files != "":

    return new_files

  return files

def expand_plugin_ini(plugin):

    if plugin['name'] == "**OUT-OF-TREE**":

      print "Out of tree plugins require the name field to be specified in plugin.ini"

      sys.exit(1)

    if plugin['plugin_dir'] == ".":

      plugin['rel_path']= plugin['plugin_dir']

      plugin['unconditional']=True

    else:

      plugin['rel_path']= plugin['plugin_dir'][len(config['top_srcdir'])+len(os.path.sep):]

      plugin['unconditional']=False

    plugin['sources']= fix_file_paths(plugin, plugin['sources'])

    plugin['main_source']= plugin['sources'].split()[0]

    plugin['headers']= fix_file_paths(plugin, plugin['headers'])

    plugin['install_headers']= fix_file_paths(plugin, plugin['install_headers'])

    plugin['tests']= fix_file_paths(plugin, plugin['tests'])

    # Make a yes/no version for autoconf help messages

    if plugin['load_by_default'] or plugin['static']:

      plugin['default_yesno']="yes"

    else:

      plugin['default_yesno']="no"

    if plugin.has_key('extra_dist'):

      plugin['extra_dist']=" ".join([os.path.join(plugin['rel_path'],f) for f in plugin['extra_dist'].split()])

    plugin['build_conditional_tag']= "BUILD_%s_PLUGIN" % plugin['name'].upper()

    plugin['name_with_dashes']= plugin['name'].replace('_','-')

    if plugin.has_key('build_conditional'):

      plugin['has_build_conditional']=True

      plugin['build_conditional']='"x${with_%(name)s_plugin}" = "xyes" -a %(build_conditional)s' % plugin

    else:

      plugin['has_build_conditional']=False

      plugin['build_conditional']='"x${with_%(name)s_plugin}" = "xyes"' %plugin

    if plugin['install']:

      plugin['library_type']= 'pkgplugin'

    else:

      plugin['library_type']= 'noinst'

def find_testsuite(plugin_dir):

  for testdir in ['drizzle-tests','tests']:

    if os.path.isdir(os.path.join(plugin_dir,testdir)):

      return testdir

  if os.path.isdir(os.path.join('tests','suite',os.path.basename(plugin_dir))):

    return ""

  return None

def read_plugin_ini(plugin_dir):

    if plugin_dir == ".":

      plugin_name="**OUT-OF-TREE**"

    else:

      short_name=os.path.basename(plugin_dir)

      plugin_name = plugin_dir[plugin_dir.index(config['root_plugin_dir']) + len(config['root_plugin_dir']) + 1:]

      module_name = plugin_name.replace("/", config['module_name_separator']).replace("\\", config['module_name_separator'])

      plugin_name = plugin_name.replace("/", config['plugin_name_separator']).replace("\\", config['plugin_name_separator'])

    plugin_file= os.path.join(plugin_dir,config['plugin_ini_fname'])

    plugin_defaults= dict(sources="%s.cc" % short_name,

                          headers="",

                          install_headers="",

                          cflags="",

                          cppflags="",

                          cxxflags="",

                          libs="",

                          ldflags="",

                          author="",

                          title="",

                          description="",

                          license="PLUGIN_LICENSE_GPL",

                          name=plugin_name,

                          module_name=module_name,

                          load_by_default=config['default_load_by_default'],

                          disabled="False",

                          static="False",

                          dependencies="",

                          dependency_aliases="",

                          tests="",

                          install=config['default_install'])

    parser=ConfigParser.ConfigParser(defaults= plugin_defaults)

    parser.read(plugin_file)

    plugin=dict(parser.items('plugin'))

    plugin['plugin_dir'] = plugin_dir

    if plugin_dir == '.':

      if not plugin.has_key('url'):

        print "External Plugins are required to specifiy a url"

        plugin['url']= 'http://launchpad.net/%(name)s' % plugin

        sys.exit(1)

      if plugin_dir == '.' and not plugin.has_key('version'):

        print "External Plugins are required to specifiy a version"

        sys.exit(1)

    if not plugin.has_key('version'):

      plugin['version'] = config['default_plugin_version']

    if plugin.has_key('load_by_default'):

      plugin['load_by_default']=parser.getboolean('plugin','load_by_default')

    if plugin.has_key('disabled'):

      plugin['disabled']=parser.getboolean('plugin','disabled')

    if plugin['disabled']:

      plugin['enabled']="no"

    else:

      plugin['enabled']="yes"

    if plugin.has_key('static'):

      plugin['static']= parser.getboolean('plugin','static')

    if plugin.has_key('install'):

      plugin['install']= parser.getboolean('plugin','install')

    if plugin.has_key('testsuite'):

      if plugin['testsuite'] == 'disable':

        plugin['testsuite']= False

        plugin['dist_testsuite']= find_testsuite(plugin_dir)

    else:

      plugin_testsuite= find_testsuite(plugin_dir)

      plugin['testsuitedir']=plugin_testsuite

      if plugin_testsuite is not None:

        plugin['testsuite']=True

      else:

        plugin['testsuite']=False

    plugin['cflags']+= ' ' + config['extra_cflags']

    plugin['cppflags']+= ' ' + config['extra_cppflags']

    plugin['cxxflags']+= ' ' + config['extra_cxxflags']

    plugin['libname']= "lib%s%s%s" % (config['plugin_prefix'],

                                      plugin['name'],

                                      config['plugin_suffix'])

    if config['force_lowercase_libname']:

      plugin['libname']= plugin['libname'].lower()

    plugin['root_plugin_dir']= config['root_plugin_dir']

    plugin['plugin_prefix']= config['plugin_prefix']

    plugin['plugin_suffix']= config['plugin_suffix']

    plugin['pkgplugindir']= config['pkgplugindir']

    # Dependencies must have a module but dependency aliases are simply added

    # to the variable passed during compile.

    plugin['dependency_list'] = plugin['dependencies'].split()

    dependency_aliases = plugin['dependency_aliases'].split()

    plugin['dependencies'] = ','.join(plugin['dependency_list'] +

                                      plugin['dependency_aliases'].split())

    dependency_libs = ["%s/lib%s%s.la" % (config['root_plugin_dir'],

                                          dependency.lower().replace('::', '_'),

                                          config['plugin_suffix'])

                       for dependency in plugin['dependency_list']]

    plugin['libs'] = " ".join(plugin['libs'].split() + dependency_libs);

# Libtool is going to expand:

#      -DPANDORA_MODULE_AUTHOR='"Padraig O'"'"'Sullivan"'

# to:

# "-DPANDORA_MODULE_AUTHOR=\"Padraig O'Sullivan\""

# So we have to replace internal ''s to '"'"'

    for key in ('author','title','description','version'):

      plugin[key]=plugin[key].replace('"','\\"')

      plugin[key]=plugin[key].replace("'","'\"'\"'")

    return plugin

def write_plugin_am(plugin, plugin_am):

  """Write an automake fragment for this plugin.

  :param plugin: The plugin dict.

  :param plugin_am: The file to write to.

  """

  # The .plugin.ini.stamp avoids changing the datestamp on plugin.ini which can

  # confuse VCS systems.

  plugin_am.write("""

EXTRA_DIST += %(rel_path)s/plugin.ini

# Prevent errors when a plugin dir is removed

%(rel_path)s/plugin.ini:

""" % plugin)

  if plugin.has_key('extra_dist') and plugin['extra_dist'] != "":

    plugin_am.write("EXTRA_DIST += %(extra_dist)s\n" % plugin)

  if plugin['headers'] != "":

    plugin_am.write("noinst_HEADERS += %(headers)s\n" % plugin)

  if plugin['install_headers'] != "":

    plugin_am.write("nobase_include_HEADERS += %(install_headers)s\n" % plugin)

  if plugin['testsuite']:

    if plugin.has_key('testsuitedir') and plugin['testsuitedir'] != "":

      plugin_am.write("EXTRA_DIST += %(rel_path)s/%(testsuitedir)s\n" % plugin)

  if plugin.has_key('dist_testsuite') and plugin['dist_testsuite'] != "":

    plugin_am.write("EXTRA_DIST += %(rel_path)s/%(dist_testsuite)s\n" % plugin)

  if plugin['static']:

    plugin_am.write("""

%(root_plugin_dir)s_%(plugin_prefix)s%(name)s_dir=${top_srcdir}/%(rel_path)s

EXTRA_DIST += %(rel_path)s/plugin.ini

if %(build_conditional_tag)s

  noinst_LTLIBRARIES+=%(root_plugin_dir)s/%(libname)s.la

  %(root_plugin_dir)s_%(libname)s_la_LIBADD=%(libs)s

  %(root_plugin_dir)s_%(libname)s_la_DEPENDENCIES=%(libs)s

  %(root_plugin_dir)s_%(libname)s_la_LDFLAGS=$(AM_LDFLAGS) %(ldflags)s $(GCOV_LIBS)

  %(root_plugin_dir)s_%(libname)s_la_CPPFLAGS=$(AM_CPPFLAGS) -DPANDORA_MODULE_NAME=%(module_name)s -DPANDORA_MODULE_AUTHOR='"%(author)s"' -DPANDORA_MODULE_TITLE='"%(title)s"' -DPANDORA_MODULE_VERSION='"%(version)s"' -DPANDORA_MODULE_LICENSE=%(license)s -DPANDORA_MODULE_DEPENDENCIES='"%(dependencies)s"' %(cppflags)s

  %(root_plugin_dir)s_%(libname)s_la_CXXFLAGS=$(AM_CXXFLAGS) %(cxxflags)s

  %(root_plugin_dir)s_%(libname)s_la_CFLAGS=$(AM_CFLAGS) %(cflags)s

  %(root_plugin_dir)s_%(libname)s_la_SOURCES=%(sources)s

  check_PROGRAMS += %(tests)s

  PANDORA_DYNAMIC_LDADDS+=${top_builddir}/%(root_plugin_dir)s/%(libname)s.la

endif

""" % plugin)

  else:

    plugin_am.write("""

%(root_plugin_dir)s_%(plugin_prefix)s%(name)s_dir=${top_srcdir}/%(rel_path)s

EXTRA_DIST += %(rel_path)s/plugin.ini

if %(build_conditional_tag)s

  %(library_type)s_LTLIBRARIES+=%(root_plugin_dir)s/%(libname)s.la

  %(root_plugin_dir)s_%(libname)s_la_LDFLAGS=-avoid-version -rpath $(pkgplugindir) $(AM_LDFLAGS) %(ldflags)s $(GCOV_LIBS)

  %(root_plugin_dir)s_%(libname)s_la_LIBADD=%(libs)s

  %(root_plugin_dir)s_%(libname)s_la_DEPENDENCIES=%(libs)s

  %(root_plugin_dir)s_%(libname)s_la_CPPFLAGS=$(AM_CPPFLAGS) -DPANDORA_DYNAMIC_PLUGIN -DPANDORA_MODULE_NAME=%(module_name)s -DPANDORA_MODULE_AUTHOR='"%(author)s"' -DPANDORA_MODULE_TITLE='"%(title)s"' -DPANDORA_MODULE_VERSION='"%(version)s"' -DPANDORA_MODULE_LICENSE=%(license)s -DPANDORA_MODULE_DEPENDENCIES='"%(dependencies)s"' %(cppflags)s

  %(root_plugin_dir)s_%(libname)s_la_CXXFLAGS=$(AM_CXXFLAGS) %(cxxflags)s

  %(root_plugin_dir)s_%(libname)s_la_CFLAGS=$(AM_CFLAGS) %(cflags)s

  %(root_plugin_dir)s_%(libname)s_la_SOURCES=%(sources)s

  check_PROGRAMS += %(tests)s

endif

""" % plugin)

  plugin_am_file=os.path.join(plugin['rel_path'],'plugin.am')

  if os.path.exists(plugin_am_file):

    plugin_am.write('include %s\n' % plugin_am_file)

#

# MAIN STARTS HERE:

#

# Parse the pandora-plugin config file

config_defaults= dict(

  top_srcdir='.',

  top_builddir='.',

  plugin_ini_fname='plugin.ini',

  plugin_prefix='',

  plugin_suffix='',

  extra_cflags='',

  extra_cppflags='',

  extra_cxxflags='',

  root_plugin_dir='',

  pkgplugindir='',

  default_install='True',

  default_plugin_version='',

  default_load_by_default='False',

  force_lowercase_libname='True',

  plugin_name_separator='_',

  module_name_separator='::'

)

config_parser = ConfigParser.ConfigParser(defaults=config_defaults)

config_parser.read(pandora_plugin_file)

config = dict(config_parser.items('pandora-plugin'))

config['force_lowercase_libname']=config_parser.getboolean('pandora-plugin','force_lowercase_libname')

# I'm 3 seconds away from writing a comprehensive build solution

if not os.path.exists('config/pandora_vc_revinfo'):

  if os.path.exists('.bzr'):

    bzr_revno= subprocess.Popen(["bzr", "revno"], stdout=subprocess.PIPE).communicate()[0].strip()

    rev_date= datetime.date.fromtimestamp(time.time())

    config['default_plugin_version'] = "%d.%02d.%s" % (rev_date.year, rev_date.month, bzr_revno)

  else:

    config['default_plugin_version']=datetime.date.fromtimestamp(time.time()).isoformat()

else:

  # need to read config/pandora_vc_revno

  pandora_vc_revno=open('config/pandora_vc_revinfo','r').read().split()

  rev_date=""

  bzr_revno=""

  for revno_line in pandora_vc_revno:

    (revno_key,revno_val)= revno_line.split("=")

    if revno_key == 'PANDORA_VC_REVNO':

      bzr_revno=revno_val.strip()

    elif revno_key == 'PANDORA_RELEASE_DATE':

      rev_date=revno_val.strip()

  config['default_plugin_version'] = "%s.%s" % (rev_date, bzr_revno)

actions=[]

for arg in sys.argv:

  if arg.startswith('--top_srcdir='):

    config['top_srcdir']=arg[12:]

  elif arg.startswith('--top_builddir='):

    config['top_builddir']=arg[14:]

  elif arg == "--force-all":

    actions=['plugin-list','pandora-plugin.am','write']

    break

  else:

    actions.append(arg)

if len(actions) == 0:

  actions.append('write')

plugin_list=[]

def accumulate_plugins(arg, dirname, fnames):

  # plugin_ini_fname is a name in dirname indicating dirname is a plugin.

  if config['plugin_ini_fname'] in fnames:

    arg.append(dirname)

os.path.walk(os.path.join(config['top_srcdir'],

                          config['root_plugin_dir']),

             accumulate_plugins,

             plugin_list)

if not os.path.exists("config/pandora-plugin.am") or "write" in actions:

  plugin_am_file = ChangeProtectedFile(os.path.join('config', 'pandora-plugin.am'))

  plugin_am_file.write("""

# always the current list, generated every build so keep this lean.

# pandora-plugin.list: datestamp preserved list

${srcdir}/config/pandora-plugin.list: .plugin.scan

.plugin.scan:

	@cd ${top_srcdir} && python config/pandora-plugin plugin-list

# Plugins affect configure; so to prevent configure running twice in a tarball

# build (once up front, once with the right list of plugins, we ship the

# generated list of plugins and the housekeeping material for that list so it

# is likewise not updated.

EXTRA_DIST += \

	config/pandora-plugin.am \

	config/pandora-plugin.ac \

	config/pandora-plugin \

	config/pandora-plugin.ini

# Seed the list of plugin LDADDS which plugins may extend.