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# Copyright 2017 The Meson development team
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Code that creates simple startup projects."""
from pathlib import Path
import re, shutil, subprocess
from glob import glob
from mesonbuild import mesonlib
from mesonbuild.environment import detect_ninja
from mesonbuild.templates.ctemplates import (create_exe_c_sample, create_lib_c_sample)
from mesonbuild.templates.cpptemplates import (create_exe_cpp_sample, create_lib_cpp_sample)
from mesonbuild.templates.objctemplates import (create_exe_objc_sample, create_lib_objc_sample)
from mesonbuild.templates.dlangtemplates import (create_exe_d_sample, create_lib_d_sample)
from mesonbuild.templates.fortrantemplates import (create_exe_fortran_sample, create_lib_fortran_sample)
from mesonbuild.templates.rusttemplates import (create_exe_rust_sample, create_lib_rust_sample)
FORTRAN_SUFFIXES = ['.f', '.for', '.F', '.f90', '.F90']
info_message = '''Sample project created. To build it run the
following commands:
meson builddir
ninja -C builddir
'''
def create_sample(options):
if options.language == 'c':
if options.type == 'executable':
create_exe_c_sample(options.name, options.version)
elif options.type == 'library':
create_lib_c_sample(options.name, options.version)
else:
raise RuntimeError('Unreachable code')
elif options.language == 'cpp':
if options.type == 'executable':
create_exe_cpp_sample(options.name, options.version)
elif options.type == 'library':
create_lib_cpp_sample(options.name, options.version)
else:
raise RuntimeError('Unreachable code')
elif options.language == 'd':
if options.type == 'executable':
create_exe_d_sample(options.name, options.version)
elif options.type == 'library':
create_lib_d_sample(options.name, options.version)
else:
raise RuntimeError('Unreachable code')
elif options.language == 'fortran':
if options.type == 'executable':
create_exe_fortran_sample(options.name, options.version)
elif options.type == 'library':
create_lib_fortran_sample(options.name, options.version)
else:
raise RuntimeError('Unreachable code')
elif options.language == 'rust':
if options.type == 'executable':
create_exe_rust_sample(options.name, options.version)
elif options.type == 'library':
create_lib_rust_sample(options.name, options.version)
else:
raise RuntimeError('Unreachable code')
elif options.language == 'objc':
if options.type == 'executable':
create_exe_objc_sample(options.name, options.version)
elif options.type == 'library':
create_lib_objc_sample(options.name, options.version)
else:
raise RuntimeError('Unreachable code')
else:
raise RuntimeError('Unreachable code')
print(info_message)
def autodetect_options(options, sample: bool = False):
if not options.name:
options.name = Path().resolve().stem
if not re.match('[a-zA-Z_][a-zA-Z0-9]*', options.name) and sample:
raise SystemExit('Name of current directory "{}" is not usable as a sample project name.\n'
'Specify a project name with --name.'.format(options.name))
print('Using "{}" (name of current directory) as project name.'
.format(options.name))
if not options.executable:
options.executable = options.name
print('Using "{}" (project name) as name of executable to build.'
.format(options.executable))
if sample:
# The rest of the autodetection is not applicable to generating sample projects.
return
if not options.srcfiles:
srcfiles = []
for f in (f for f in Path().iterdir() if f.is_file()):
if f.suffix in (['.cc', '.cpp', '.c', '.d', '.m', '.rs'] + FORTRAN_SUFFIXES):
srcfiles.append(f)
if not srcfiles:
raise SystemExit('No recognizable source files found.\n'
'Run meson init in an empty directory to create a sample project.')
options.srcfiles = srcfiles
print("Detected source files: " + ' '.join(map(str, srcfiles)))
options.srcfiles = [Path(f) for f in options.srcfiles]
if not options.language:
for f in options.srcfiles:
if f.suffix in ('.cc', '.cpp'):
options.language = 'cpp'
break
if f.suffix == '.c':
options.language = 'c'
break
if f.suffix == '.d':
options.language = 'd'
break
if f.suffix in FORTRAN_SUFFIXES:
options.language = 'fortran'
break
if f.suffix == '.rs':
options.language = 'rust'
break
if f.suffix == '.m':
options.language = 'objc'
break
if not options.language:
raise SystemExit("Can't autodetect language, please specify it with -l.")
print("Detected language: " + options.language)
meson_executable_template = '''project('{project_name}', '{language}',
version : '{version}',
default_options : [{default_options}])
executable('{executable}',
{sourcespec},{depspec}
install : true)
'''
def create_meson_build(options):
if options.type != 'executable':
raise SystemExit('\nGenerating a meson.build file from existing sources is\n'
'supported only for project type "executable".\n'
'Run meson init in an empty directory to create a sample project.')
default_options = ['warning_level=3']
if options.language == 'cpp':
# This shows how to set this very common option.
default_options += ['cpp_std=c++14']
# If we get a meson.build autoformatter one day, this code could
# be simplified quite a bit.
formatted_default_options = ', '.join("'{}'".format(x) for x in default_options)
sourcespec = ',\n '.join("'{}'".format(x) for x in options.srcfiles)
depspec = ''
if options.deps:
depspec = '\n dependencies : [\n '
depspec += ',\n '.join("dependency('{}')".format(x)
for x in options.deps.split(','))
depspec += '],'
content = meson_executable_template.format(project_name=options.name,
language=options.language,
version=options.version,
executable=options.executable,
sourcespec=sourcespec,
depspec=depspec,
default_options=formatted_default_options)
open('meson.build', 'w').write(content)
print('Generated meson.build file:\n\n' + content)
def add_arguments(parser):
parser.add_argument("srcfiles", metavar="sourcefile", nargs="*",
help="source files. default: all recognized files in current directory")
parser.add_argument("-n", "--name", help="project name. default: name of current directory")
parser.add_argument("-e", "--executable", help="executable name. default: project name")
parser.add_argument("-d", "--deps", help="dependencies, comma-separated")
parser.add_argument("-l", "--language", choices=['c', 'cpp', 'd', 'fortran', 'rust', 'objc'],
help="project language. default: autodetected based on source files")
parser.add_argument("-b", "--build", help="build after generation", action='store_true')
parser.add_argument("--builddir", help="directory for build", default='build')
parser.add_argument("-f", "--force", action="store_true",
help="force overwrite of existing files and directories.")
parser.add_argument('--type', default='executable',
choices=['executable', 'library'])
parser.add_argument('--version', default='0.1')
def run(options) -> int:
if not glob('*'):
autodetect_options(options, sample=True)
if not options.language:
print('Defaulting to generating a C language project.')
options.language = 'c'
create_sample(options)
else:
autodetect_options(options)
if Path('meson.build').is_file() and not options.force:
raise SystemExit('meson.build already exists. Use --force to overwrite.')
create_meson_build(options)
if options.build:
if Path(options.builddir).is_dir() and options.force:
print('Build directory already exists, deleting it.')
shutil.rmtree(options.builddir)
print('Building...')
cmd = mesonlib.meson_command + [options.builddir]
ret = subprocess.run(cmd)
if ret.returncode:
raise SystemExit
cmd = [detect_ninja(), '-C', options.builddir]
ret = subprocess.run(cmd)
if ret.returncode:
raise SystemExit
return 0
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