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# Copyright (c) 2021, Dell Inc. or its subsidiaries.  All rights reserved.
# SPDX-License-Identifier: Apache-2.0
# See the LICENSE file for details.
#
# This file is part of NVMe STorage Appliance Services (nvme-stas).
#
# Authors: Martin Belanger <Martin.Belanger@dell.com>
#
project(
    'nvme-stas',
    meson_version: '>= 0.53.0',
    version: '2.3-rc3',
    license: 'Apache-2.0',
    default_options: [
        'buildtype=release',
        'prefix=/usr',
        'sysconfdir=/etc',
    ]
)

fs = import('fs')

#===============================================================================
prefix  = get_option('prefix')
datadir = prefix / get_option('datadir')
etcdir  = prefix / get_option('sysconfdir')
bindir  = prefix / get_option('bindir')
sbindir = prefix / get_option('sbindir')
mandir  = prefix / get_option('mandir')
docdir  = datadir / 'doc' / 'nvme-stas'
cnfdir  = etcdir / 'stas'

want_man  = get_option('man')
want_html = get_option('html')
want_readthedocs = get_option('readthedocs')

buildtime_modules = []
if want_man or want_html or want_readthedocs
    buildtime_modules += ['lxml']
endif

python3 = import('python').find_installation('python3', modules:buildtime_modules)
python_version = python3.language_version()
python_version_req = '>=3.6'
if not python_version.version_compare(python_version_req)
    error('Python @0@ required. Found @1@ instead'.format(python_version_req, python_version))
endif

# Check if the runtime Python modules are present. These are not needed
# to build nvme-stas, but will be needed to run the tests.
missing_runtime_mods = false
py_modules_reqd = [
    ['libnvme', 'Install python3-libnvme (deb/rpm)'],
    ['dasbus',  'Install python3-dasbus (deb/rpm) OR pip3 install dasbus'],
    ['pyudev',  'Install python3-pyudev (deb/rpm)'],
    ['systemd', 'Install python3-systemd (deb/rpm)'],
    ['gi',      'Install python3-gi (deb) OR python3-gobject (rpm)'],
]
foreach p : py_modules_reqd
    if run_command(python3, '-c', 'import @0@'.format(p[0]), check: false).returncode() != 0
        warning('Missing runtime module "@0@". @1@'.format(p[0], p[1]))
        missing_runtime_mods = true
    endif
endforeach

if missing_runtime_mods and get_option('rt_pymods_reqd')
    error('Please install missing runtime modules')
endif


#===============================================================================
conf = configuration_data()

conf.set('VERSION', meson.project_version())
conf.set('LICENSE', meson.project_license()[0])
conf.set('BUILD_DIR', meson.current_build_dir())
conf.set('STAFD_DBUS_NAME', 'org.nvmexpress.staf')
conf.set('STAFD_DBUS_PATH', '/org/nvmexpress/staf')
conf.set('STACD_DBUS_NAME', 'org.nvmexpress.stac')
conf.set('STACD_DBUS_PATH', '/org/nvmexpress/stac')

#===============================================================================
stafd = configure_file(
    input: 'stafd.py',
    output: 'stafd',
    install_dir: sbindir,
    copy: true,
)
stacd = configure_file(
    input: 'stacd.py',
    output: 'stacd',
    install_dir: sbindir,
    copy: true,
)

stafctl = configure_file(
    input: 'stafctl.py',
    output: 'stafctl',
    install_dir: bindir,
    copy: true,
)

stacctl = configure_file(
    input: 'stacctl.py',
    output: 'stacctl',
    install_dir: bindir,
    copy: true,
)

stasadm = configure_file(
    input: 'stasadm.py',
    output: 'stasadm',
    install_dir: bindir,
    copy: true,
)

#===========================================================================
install_subdir(
    'etc/stas',
    install_dir: etcdir,
)

#===========================================================================
foreach component : [ 'nvme-stas.spec', '.coveragerc', 'coverage.sh', ]
    configure_file(
        input:         component + '.in',
        output:        component,
        configuration: conf,
    )
endforeach

#===========================================================================
# Make a list of modules to lint
modules_to_lint = [stafd, stafctl, stacd, stacctl, stasadm]


# Point Python Path to Current Build Dir.
# This is used by other meson.build files.
PYTHON_SEARCH_PATHS = [
    conf.get('BUILD_DIR'),
    conf.get('BUILD_DIR') / 'subprojects' / 'libnvme',
]
PYTHONPATH = ':'.join(PYTHON_SEARCH_PATHS)

#===========================================================================
subdir('staslib')
subdir('etc/dbus-1/system.d')
subdir('usr/lib/systemd/system')
subdir('test')
subdir('doc')


#===========================================================================
summary_dict = {
    'prefix ':              prefix,
    'etcdir ':              etcdir,
    'cnfdir ':              cnfdir,
    'bindir ':              bindir,
    'sbindir ':             sbindir,
    'datadir ':             datadir,
    'mandir ':              mandir,
    'docdir ':              docdir,
    'dbus_conf_dir ':       dbus_conf_dir,
    'sd_unit_dir ':         sd_unit_dir,
    'build location ':      meson.current_build_dir(),
    'libnvme for tests ':   libnvme_location,
}
summary(summary_dict, section: 'Directories')

summary_dict = {
    'want_man ':            want_man,
    'want_html ':           want_html,
    'want_readthedocs ':    want_readthedocs,
}
if meson.version().version_compare('>=0.57.0')  # conf.keys()
    foreach key : conf.keys()
        if key not in ['BUILD_DIR', 'VERSION', 'LICENSE']
            summary_dict += { key + ' ': conf.get(key) }
        endif
    endforeach
endif
summary(summary_dict, section: 'Configuration', bool_yn: true)