###########################
# this handles the magic we need to do for installing
# with all the configure options that affect rpath and shared
# library use

import Options
from TaskGen import feature, before, after
from samba_utils import *

@feature('install_bin')
@after('apply_core')
@before('apply_link')
def install_binary(self):
    '''install a binary, taking account of the different rpath varients'''
    bld = self.bld

    # get the ldflags we will use for install and build
    install_ldflags = install_rpath(bld)
    build_ldflags   = build_rpath(bld)

    if not Options.is_install or not self.samba_install:
        # just need to set rpath if we are not installing
        self.env.append_value('LINKFLAGS', build_ldflags)
        return

    # work out the install path, expanding variables
    install_path = self.samba_inst_path or '${BINDIR}'
    install_path = bld.EXPAND_VARIABLES(install_path)

    orig_target = self.target

    if install_ldflags != build_ldflags:
        # we will be creating a new target name, and using that for the
        # install link. That stops us from overwriting the existing build
        # target, which has different ldflags
        self.target += '.inst'

    # setup the right rpath link flags for the install
    self.env.append_value('LINKFLAGS', install_ldflags)

    # tell waf to install the right binary
    bld.install_as(os.path.join(install_path, orig_target),
                   os.path.join(self.path.abspath(bld.env), self.target),
                   chmod=0755)



@feature('install_lib')
@after('apply_core')
@before('apply_link')
def install_library(self):
    '''install a library, taking account of the different rpath varients'''
    if getattr(self, 'done_install_library', False):
        return

    bld = self.bld

    install_ldflags = install_rpath(bld)
    build_ldflags   = build_rpath(bld)

    if not Options.is_install or not self.samba_install:
        # just need to set the build rpath if we are not installing
        self.env.append_value('LINKFLAGS', build_ldflags)
        return

    # setup the install path, expanding variables
    install_path = self.samba_inst_path or '${LIBDIR}'
    install_path = bld.EXPAND_VARIABLES(install_path)

    if install_ldflags != build_ldflags:
        # we will be creating a new target name, and using that for the
        # install link. That stops us from overwriting the existing build
        # target, which has different ldflags
        self.done_install_library = True
        t = self.clone('default')
        t.target += '.inst'
        self.env.append_value('LINKFLAGS', build_ldflags)
    else:
        t = self

    t.env.append_value('LINKFLAGS', install_ldflags)

    if self.samba_realname:
        install_name = self.samba_realname
        install_link = None
        inst_name    = t.target + '.so'
    elif self.vnum:
        vnum_base    = self.vnum.split('.')[0]
        install_name = 'lib%s.so.%s' % (self.target, self.vnum)
        install_link = 'lib%s.so.%s' % (self.target, vnum_base)
        inst_name    = 'lib%s.so' % t.target
    else:
        install_name = 'lib%s.so' % self.target
        install_link = None
        inst_name    = 'lib%s.so' % t.target

    # tell waf to install the library
    bld.install_as(os.path.join(install_path, install_name),
                   os.path.join(self.path.abspath(bld.env), inst_name))
    if install_link:
        # and the symlink if needed
        bld.symlink_as(os.path.join(install_path, install_link),
                       install_name)



##############################
# handle the creation of links for libraries and binaries in the build tree
# note that we use a relative symlink path to allow the whole tree
# to me moved/copied elsewhere without breaking the links
t = Task.simple_task_type('symlink_lib', 'rm -f ${LINK_TARGET} && ln -s ${LINK_SOURCE} ${LINK_TARGET}',
                          shell=True, color='PINK', ext_in='.bin')
t.quiet = True

@feature('symlink_lib')
@after('apply_link')
def symlink_lib(self):
    '''symlink a shared lib'''
    if Options.is_install:
        return

    tsk = self.create_task('symlink_lib', self.link_task.outputs[0])

    # calculat the link target and put it in the environment
    soext=""
    vnum = getattr(self, 'vnum', None)
    if vnum is not None:
        soext = '.' + vnum.split('.')[0]

    link_target = getattr(self, 'link_name', '')
    if link_target == '':
        link_target = '%s/lib%s.so%s' % (LIB_PATH, self.target, soext)


    link_source = os_path_relpath(self.link_task.outputs[0].abspath(self.env),
                                  os.path.join(self.env.BUILD_DIRECTORY, link_target))

    tsk.env.LINK_TARGET = link_target
    tsk.env.LINK_SOURCE = link_source[3:]
    debug('task_gen: LINK for %s is %s -> %s',
          self.name, tsk.env.LINK_SOURCE, tsk.env.LINK_TARGET)


t = Task.simple_task_type('symlink_bin', 'rm -f ${BIN_TARGET} && ln -s ${SRC} ${BIN_TARGET}',
                          shell=True, color='PINK', ext_in='.bin')
t.quiet = True

@feature('symlink_bin')
@after('apply_link')
def symlink_bin(self):
    '''symlink a binary'''
    if Options.is_install:
        return
    tsk = self.create_task('symlink_bin', self.link_task.outputs[0])

    tsk.env.BIN_TARGET = self.target
    debug('task_gen: BIN_TARGET for %s is %s', self.name, tsk.env.BIN_TARGET)