gstreamer/gst-env.py
Antonio Ospite fa9627eb75 gst-env: use Path.open() in get_pkgconfig_variable_from_pcfile()
The pcfile argument passed to get_target_install_filename() is
guaranteed to be a Path() object so use the .open() method to open the
file instead of the standard open() function.

This makes it possible to run gst-env.py on older systems with pyhton3.5
where the standard open() function cannot handle Path arguments.

The change fixes errors like the following:

-----------------------------------------------------------------------
$ ninja -C build/ devenv
ninja: Entering directory `build/'
[0/1] Running external command devenv
Traceback (most recent call last):
  File "/home/ao2/gst-build/gst-env.py", line 493, in <module>
    env = get_subprocess_env(options, gst_version)
  File "/home/ao2/gst-build/gst-env.py", line 342, in get_subprocess_env
    elif is_gio_module(target, filename, options.builddir):
  File "/home/ao2/gst-build/gst-env.py", line 121, in is_gio_module
    giomoduledir = PurePath(get_pkgconfig_variable(builddir, 'gio-2.0', 'giomoduledir'))
  File "/home/ao2/gst-build/gst-env.py", line 110, in get_pkgconfig_variable
    return get_pkgconfig_variable_from_pcfile(pcfile, varname)
  File "/home/ao2/gst-build/gst-env.py", line 89, in get_pkgconfig_variable_from_pcfile
    with open(pcfile, 'r', encoding='utf-8') as f:
TypeError: invalid file: PosixPath('/home/ao2/gst-build/build/meson-private/gio-2.0.pc')
FAILED: meson-devenv
-----------------------------------------------------------------------

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-build/-/merge_requests/192>
2020-09-24 13:50:09 +02:00

550 lines
23 KiB
Python
Executable file

#!/usr/bin/env python3
import argparse
import contextlib
import glob
import json
import os
import platform
import re
import site
import shlex
import shutil
import subprocess
import sys
import tempfile
import pathlib
import signal
from functools import lru_cache
from pathlib import PurePath, Path
from distutils.sysconfig import get_python_lib
from distutils.util import strtobool
from scripts.common import get_meson
from scripts.common import git
from scripts.common import win32_get_short_path_name
from scripts.common import get_wine_shortpath
SCRIPTDIR = os.path.dirname(os.path.realpath(__file__))
PREFIX_DIR = os.path.join(SCRIPTDIR, 'prefix')
# Look for the following build dirs: `build` `_build` `builddir`
DEFAULT_BUILDDIR = os.path.join(SCRIPTDIR, 'build')
if not os.path.exists(DEFAULT_BUILDDIR):
DEFAULT_BUILDDIR = os.path.join(SCRIPTDIR, '_build')
if not os.path.exists(DEFAULT_BUILDDIR):
DEFAULT_BUILDDIR = os.path.join(SCRIPTDIR, 'builddir')
TYPELIB_REG = re.compile(r'.*\.typelib$')
SHAREDLIB_REG = re.compile(r'\.so|\.dylib|\.dll')
# libdir is expanded from option of the same name listed in the `meson
# introspect --buildoptions` output.
GSTPLUGIN_FILEPATH_REG_TEMPLATE = r'.*/{libdir}/gstreamer-1.0/[^/]+$'
GSTPLUGIN_FILEPATH_REG = None
def listify(o):
if isinstance(o, str):
return [o]
if isinstance(o, list):
return o
raise AssertionError('Object {!r} must be a string or a list'.format(o))
def stringify(o):
if isinstance(o, str):
return o
if isinstance(o, list):
if len(o) == 1:
return o[0]
raise AssertionError('Did not expect object {!r} to have more than one element'.format(o))
raise AssertionError('Object {!r} must be a string or a list'.format(o))
def prepend_env_var(env, var, value, sysroot):
if value.startswith(sysroot):
value = value[len(sysroot):]
# Try not to exceed maximum length limits for env vars on Windows
if os.name == 'nt':
value = win32_get_short_path_name(value)
env_val = env.get(var, '')
val = os.pathsep + value + os.pathsep
# Don't add the same value twice
if val in env_val or env_val.startswith(value + os.pathsep):
return
env[var] = val + env_val
env[var] = env[var].replace(os.pathsep + os.pathsep, os.pathsep).strip(os.pathsep)
def get_target_install_filename(target, filename):
'''
Checks whether this file is one of the files installed by the target
'''
basename = os.path.basename(filename)
for install_filename in listify(target['install_filename']):
if install_filename.endswith(basename):
return install_filename
return None
def get_pkgconfig_variable_from_pcfile(pcfile, varname):
variables = {}
substre = re.compile('\$\{[^${}]+\}')
with pcfile.open('r', encoding='utf-8') as f:
for line in f:
if '=' not in line:
continue
key, value = line[:-1].split('=', 1)
subst = {}
for each in substre.findall(value):
substkey = each[2:-1]
subst[each] = variables.get(substkey, '')
for k, v in subst.items():
value = value.replace(k, v)
variables[key] = value
return variables.get(varname, '')
@lru_cache()
def get_pkgconfig_variable(builddir, pcname, varname):
'''
Parsing isn't perfect, but it's good enough.
'''
pcfile = Path(builddir) / 'meson-private' / (pcname + '.pc')
if pcfile.is_file():
return get_pkgconfig_variable_from_pcfile(pcfile, varname)
return subprocess.check_output(['pkg-config', pcname, '--variable=' + varname],
universal_newlines=True, encoding='utf-8')
def is_gio_module(target, filename, builddir):
if target['type'] != 'shared module':
return False
install_filename = get_target_install_filename(target, filename)
if not install_filename:
return False
giomoduledir = PurePath(get_pkgconfig_variable(builddir, 'gio-2.0', 'giomoduledir'))
fpath = PurePath(install_filename)
if fpath.parent != giomoduledir:
return False
return True
def is_library_target_and_not_plugin(target, filename):
'''
Don't add plugins to PATH/LD_LIBRARY_PATH because:
1. We don't need to
2. It causes us to exceed the PATH length limit on Windows and Wine
'''
if target['type'] != 'shared library':
return False
# Check if this output of that target is a shared library
if not SHAREDLIB_REG.search(filename):
return False
# Check if it's installed to the gstreamer plugin location
install_filename = get_target_install_filename(target, filename)
if not install_filename:
return False
global GSTPLUGIN_FILEPATH_REG
if GSTPLUGIN_FILEPATH_REG is None:
GSTPLUGIN_FILEPATH_REG = re.compile(GSTPLUGIN_FILEPATH_REG_TEMPLATE)
if GSTPLUGIN_FILEPATH_REG.search(install_filename.replace('\\', '/')):
return False
return True
def is_binary_target_and_in_path(target, filename, bindir):
if target['type'] != 'executable':
return False
# Check if this file installed by this target is installed to bindir
install_filename = get_target_install_filename(target, filename)
if not install_filename:
return False
fpath = PurePath(install_filename)
if fpath.parent != bindir:
return False
return True
def get_wine_subprocess_env(options, env):
with open(os.path.join(options.builddir, 'meson-info', 'intro-buildoptions.json')) as f:
buildoptions = json.load(f)
prefix, = [o for o in buildoptions if o['name'] == 'prefix']
path = os.path.normpath(os.path.join(prefix['value'], 'bin'))
prepend_env_var(env, "PATH", path, options.sysroot)
wine_path = get_wine_shortpath(
options.wine.split(' '),
[path] + env.get('WINEPATH', '').split(';')
)
if options.winepath:
wine_path += ';' + options.winepath
env['WINEPATH'] = wine_path
env['WINEDEBUG'] = 'fixme-all'
return env
def setup_gdb(options):
python_paths = set()
if not shutil.which('gdb'):
return python_paths
bdir = pathlib.Path(options.builddir).resolve()
for libpath, gdb_path in [
(os.path.join("subprojects", "gstreamer", "gst"),
os.path.join("subprojects", "gstreamer", "libs", "gst", "helpers")),
(os.path.join("subprojects", "glib", "gobject"), None),
(os.path.join("subprojects", "glib", "glib"), None)]:
if not gdb_path:
gdb_path = libpath
autoload_path = (pathlib.Path(bdir) / 'gdb-auto-load').joinpath(*bdir.parts[1:]) / libpath
autoload_path.mkdir(parents=True, exist_ok=True)
for gdb_helper in glob.glob(str(bdir / gdb_path / "*-gdb.py")):
python_paths.add(str(bdir / gdb_path))
python_paths.add(os.path.join(options.srcdir, gdb_path))
try:
if os.name == 'nt':
shutil.copy(gdb_helper, str(autoload_path / os.path.basename(gdb_helper)))
else:
os.symlink(gdb_helper, str(autoload_path / os.path.basename(gdb_helper)))
except (FileExistsError, shutil.SameFileError):
pass
gdbinit_line = 'add-auto-load-scripts-directory {}\n'.format(bdir / 'gdb-auto-load')
try:
with open(os.path.join(options.srcdir, '.gdbinit'), 'r') as f:
if gdbinit_line in f.readlines():
return python_paths
except FileNotFoundError:
pass
with open(os.path.join(options.srcdir, '.gdbinit'), 'a') as f:
f.write(gdbinit_line)
return python_paths
def get_subprocess_env(options, gst_version):
env = os.environ.copy()
env["CURRENT_GST"] = os.path.normpath(SCRIPTDIR)
env["GST_VERSION"] = gst_version
env["GST_VALIDATE_SCENARIOS_PATH"] = os.path.normpath(
"%s/subprojects/gst-devtools/validate/data/scenarios" % SCRIPTDIR)
env["GST_VALIDATE_PLUGIN_PATH"] = os.path.normpath(
"%s/subprojects/gst-devtools/validate/plugins" % options.builddir)
env["GST_VALIDATE_APPS_DIR"] = os.path.normpath(
"%s/subprojects/gst-editing-services/tests/validate" % SCRIPTDIR)
env["GST_ENV"] = 'gst-' + gst_version
env["GST_REGISTRY"] = os.path.normpath(options.builddir + "/registry.dat")
prepend_env_var(env, "PATH", os.path.normpath(
"%s/subprojects/gst-devtools/validate/tools" % options.builddir),
options.sysroot)
if options.wine:
return get_wine_subprocess_env(options, env)
prepend_env_var(env, "PATH", os.path.join(SCRIPTDIR, 'meson'),
options.sysroot)
env["GST_PLUGIN_SYSTEM_PATH"] = ""
env["GST_PLUGIN_SCANNER"] = os.path.normpath(
"%s/subprojects/gstreamer/libs/gst/helpers/gst-plugin-scanner" % options.builddir)
env["GST_PTP_HELPER"] = os.path.normpath(
"%s/subprojects/gstreamer/libs/gst/helpers/gst-ptp-helper" % options.builddir)
if os.name == 'nt':
lib_path_envvar = 'PATH'
elif platform.system() == 'Darwin':
lib_path_envvar = 'DYLD_LIBRARY_PATH'
else:
lib_path_envvar = 'LD_LIBRARY_PATH'
prepend_env_var(env, "GST_PLUGIN_PATH", os.path.join(SCRIPTDIR, 'subprojects',
'gst-python', 'plugin'),
options.sysroot)
prepend_env_var(env, "GST_PLUGIN_PATH", os.path.join(PREFIX_DIR, 'lib',
'gstreamer-1.0'),
options.sysroot)
prepend_env_var(env, "GST_PLUGIN_PATH", os.path.join(options.builddir, 'subprojects',
'libnice', 'gst'),
options.sysroot)
prepend_env_var(env, "GST_VALIDATE_SCENARIOS_PATH",
os.path.join(PREFIX_DIR, 'share', 'gstreamer-1.0',
'validate', 'scenarios'),
options.sysroot)
prepend_env_var(env, "GI_TYPELIB_PATH", os.path.join(PREFIX_DIR, 'lib',
'lib', 'girepository-1.0'),
options.sysroot)
prepend_env_var(env, "PKG_CONFIG_PATH", os.path.join(PREFIX_DIR, 'lib', 'pkgconfig'),
options.sysroot)
# gst-indent
prepend_env_var(env, "PATH", os.path.join(SCRIPTDIR, 'gstreamer', 'tools'),
options.sysroot)
# tools: gst-launch-1.0, gst-inspect-1.0
prepend_env_var(env, "PATH", os.path.join(options.builddir, 'subprojects',
'gstreamer', 'tools'),
options.sysroot)
prepend_env_var(env, "PATH", os.path.join(options.builddir, 'subprojects',
'gst-plugins-base', 'tools'),
options.sysroot)
# Library and binary search paths
prepend_env_var(env, "PATH", os.path.join(PREFIX_DIR, 'bin'),
options.sysroot)
if lib_path_envvar != 'PATH':
prepend_env_var(env, lib_path_envvar, os.path.join(PREFIX_DIR, 'lib'),
options.sysroot)
prepend_env_var(env, lib_path_envvar, os.path.join(PREFIX_DIR, 'lib64'),
options.sysroot)
elif 'QMAKE' in os.environ:
# There's no RPATH on Windows, so we need to set PATH for the qt5 DLLs
prepend_env_var(env, 'PATH', os.path.dirname(os.environ['QMAKE']),
options.sysroot)
meson = get_meson()
targets_s = subprocess.check_output(meson + ['introspect', options.builddir, '--targets'])
targets = json.loads(targets_s.decode())
paths = set()
mono_paths = set()
srcdir_path = pathlib.Path(options.srcdir)
build_options_s = subprocess.check_output(meson + ['introspect', options.builddir, '--buildoptions'])
build_options = json.loads(build_options_s.decode())
libdir, = [o['value'] for o in build_options if o['name'] == 'libdir']
libdir = PurePath(libdir)
prefix, = [o['value'] for o in build_options if o['name'] == 'prefix']
bindir, = [o['value'] for o in build_options if o['name'] == 'bindir']
prefix = PurePath(prefix)
bindir = prefix / bindir
global GSTPLUGIN_FILEPATH_REG_TEMPLATE
GSTPLUGIN_FILEPATH_REG_TEMPLATE = GSTPLUGIN_FILEPATH_REG_TEMPLATE.format(libdir=libdir.as_posix())
for target in targets:
filenames = listify(target['filename'])
if not target['installed']:
continue
for filename in filenames:
root = os.path.dirname(filename)
if srcdir_path / "subprojects/gst-devtools/validate/plugins" in (srcdir_path / root).parents:
continue
if filename.endswith('.dll'):
mono_paths.add(os.path.join(options.builddir, root))
if TYPELIB_REG.search(filename):
prepend_env_var(env, "GI_TYPELIB_PATH",
os.path.join(options.builddir, root),
options.sysroot)
elif is_library_target_and_not_plugin(target, filename):
prepend_env_var(env, lib_path_envvar,
os.path.join(options.builddir, root),
options.sysroot)
elif is_binary_target_and_in_path(target, filename, bindir):
paths.add(os.path.join(options.builddir, root))
elif is_gio_module(target, filename, options.builddir):
prepend_env_var(env, 'GIO_EXTRA_MODULES',
os.path.join(options.builddir, root),
options.sysroot)
with open(os.path.join(options.builddir, 'GstPluginsPath.json')) as f:
for plugin_path in json.load(f):
prepend_env_var(env, 'GST_PLUGIN_PATH', plugin_path,
options.sysroot)
# Sort to iterate in a consistent order (`set`s and `hash`es are randomized)
for p in sorted(paths):
prepend_env_var(env, 'PATH', p, options.sysroot)
if os.name != 'nt':
for p in sorted(mono_paths):
prepend_env_var(env, "MONO_PATH", p, options.sysroot)
presets = set()
encoding_targets = set()
pkg_dirs = set()
python_dirs = setup_gdb(options)
if '--installed' in subprocess.check_output(meson + ['introspect', '-h']).decode():
installed_s = subprocess.check_output(meson + ['introspect', options.builddir, '--installed'])
for path, installpath in json.loads(installed_s.decode()).items():
installpath_parts = pathlib.Path(installpath).parts
path_parts = pathlib.Path(path).parts
# We want to add all python modules to the PYTHONPATH
# in a manner consistent with the way they would be imported:
# For example if the source path /home/meh/foo/bar.py
# is to be installed in /usr/lib/python/site-packages/foo/bar.py,
# we want to add /home/meh to the PYTHONPATH.
# This will only work for projects where the paths to be installed
# mirror the installed directory layout, for example if the path
# is /home/meh/baz/bar.py and the install path is
# /usr/lib/site-packages/foo/bar.py , we will not add anything
# to PYTHONPATH, but the current approach works with pygobject
# and gst-python at least.
if 'site-packages' in installpath_parts:
install_subpath = os.path.join(*installpath_parts[installpath_parts.index('site-packages') + 1:])
if path.endswith(install_subpath):
python_dirs.add(path[:len (install_subpath) * -1])
if path.endswith('.prs'):
presets.add(os.path.dirname(path))
elif path.endswith('.gep'):
encoding_targets.add(
os.path.abspath(os.path.join(os.path.dirname(path), '..')))
elif path.endswith('.pc'):
# Is there a -uninstalled pc file for this file?
uninstalled = "{0}-uninstalled.pc".format(path[:-3])
if os.path.exists(uninstalled):
pkg_dirs.add(os.path.dirname(path))
if path.endswith('gstomx.conf'):
prepend_env_var(env, 'GST_OMX_CONFIG_DIR', os.path.dirname(path),
options.sysroot)
for p in sorted(presets):
prepend_env_var(env, 'GST_PRESET_PATH', p, options.sysroot)
for t in sorted(encoding_targets):
prepend_env_var(env, 'GST_ENCODING_TARGET_PATH', t, options.sysroot)
for pkg_dir in sorted(pkg_dirs):
prepend_env_var(env, "PKG_CONFIG_PATH", pkg_dir, options.sysroot)
# Check if meson has generated -uninstalled pkgconfig files
meson_uninstalled = pathlib.Path(options.builddir) / 'meson-uninstalled'
if meson_uninstalled.is_dir():
prepend_env_var(env, 'PKG_CONFIG_PATH', str(meson_uninstalled), options.sysroot)
for python_dir in sorted(python_dirs):
prepend_env_var(env, 'PYTHONPATH', python_dir, options.sysroot)
mesonpath = os.path.join(SCRIPTDIR, "meson")
if os.path.join(mesonpath):
# Add meson/ into PYTHONPATH if we are using a local meson
prepend_env_var(env, 'PYTHONPATH', mesonpath, options.sysroot)
# For devhelp books
if 'XDG_DATA_DIRS' not in env or not env['XDG_DATA_DIRS']:
# Preserve default paths when empty
prepend_env_var(env, 'XDG_DATA_DIRS', '/usr/local/share/:/usr/share/', '')
prepend_env_var (env, 'XDG_DATA_DIRS', os.path.join(options.builddir,
'subprojects',
'gst-docs',
'GStreamer-doc'),
options.sysroot)
if 'XDG_CONFIG_DIRS' not in env or not env['XDG_CONFIG_DIRS']:
# Preserve default paths when empty
prepend_env_var(env, 'XDG_CONFIG_DIRS', '/etc/local/xdg:/etc/xdg', '')
prepend_env_var(env, "XDG_CONFIG_DIRS", os.path.join(PREFIX_DIR, 'etc', 'xdg'),
options.sysroot)
return env
def get_windows_shell():
command = ['powershell.exe' ,'-noprofile', '-executionpolicy', 'bypass', '-file', 'cmd_or_ps.ps1']
result = subprocess.check_output(command)
return result.decode().strip()
if __name__ == "__main__":
parser = argparse.ArgumentParser(prog="gst-env")
parser.add_argument("--builddir",
default=DEFAULT_BUILDDIR,
help="The meson build directory")
parser.add_argument("--srcdir",
default=SCRIPTDIR,
help="The top level source directory")
parser.add_argument("--sysroot",
default='',
help="The sysroot path used during cross-compilation")
parser.add_argument("--wine",
default='',
help="Build a wine env based on specified wine command")
parser.add_argument("--winepath",
default='',
help="Extra path to set to WINEPATH.")
parser.add_argument("--only-environment",
action='store_true',
default=False,
help="Do not start a shell, only print required environment.")
options, args = parser.parse_known_args()
if not os.path.exists(options.builddir):
print("GStreamer not built in %s\n\nBuild it and try again" %
options.builddir)
exit(1)
options.builddir = os.path.abspath(options.builddir)
if not os.path.exists(options.srcdir):
print("The specified source dir does not exist" %
options.srcdir)
exit(1)
# The following incantation will retrieve the current branch name.
try:
gst_version = git("rev-parse", "--symbolic-full-name", "--abbrev-ref", "HEAD",
repository_path=options.srcdir).strip('\n')
except subprocess.CalledProcessError:
gst_version = "unknown"
if options.wine:
gst_version += '-' + os.path.basename(options.wine)
env = get_subprocess_env(options, gst_version)
if not args:
if os.name == 'nt':
shell = get_windows_shell()
if shell == 'powershell.exe':
args = ['powershell.exe']
args += ['-NoLogo', '-NoExit']
prompt = 'function global:prompt { "[gst-' + gst_version + '"+"] PS " + $PWD + "> "}'
args += ['-Command', prompt]
else:
args = [os.environ.get("COMSPEC", r"C:\WINDOWS\system32\cmd.exe")]
args += ['/k', 'prompt [gst-{}] $P$G'.format(gst_version)]
else:
args = [os.environ.get("SHELL", os.path.realpath("/bin/sh"))]
if args[0].endswith('bash') and not strtobool(os.environ.get("GST_BUILD_DISABLE_PS1_OVERRIDE", r"FALSE")):
# Let the GC remove the tmp file
tmprc = tempfile.NamedTemporaryFile(mode='w')
bashrc = os.path.expanduser('~/.bashrc')
if os.path.exists(bashrc):
with open(bashrc, 'r') as src:
shutil.copyfileobj(src, tmprc)
tmprc.write('\nexport PS1="[gst-%s] $PS1"' % gst_version)
tmprc.flush()
args.append("--rcfile")
args.append(tmprc.name)
elif args[0].endswith('fish'):
# Ignore SIGINT while using fish as the shell to make it behave
# like other shells such as bash and zsh.
# See: https://gitlab.freedesktop.org/gstreamer/gst-build/issues/18
signal.signal(signal.SIGINT, lambda x, y: True)
# Set the prompt
args.append('--init-command')
prompt_cmd = '''functions --copy fish_prompt original_fish_prompt
function fish_prompt
echo -n '[gst-{}] '(original_fish_prompt)
end'''.format(gst_version)
args.append(prompt_cmd)
elif args[0].endswith('zsh'):
tmpdir = tempfile.TemporaryDirectory()
# Let the GC remove the tmp file
tmprc = open(os.path.join(tmpdir.name, '.zshrc'), 'w')
zshrc = os.path.expanduser('~/.zshrc')
if os.path.exists(zshrc):
with open(zshrc, 'r') as src:
shutil.copyfileobj(src, tmprc)
tmprc.write('\nexport PROMPT="[gst-{}] $PROMPT"'.format(gst_version))
tmprc.flush()
env['ZDOTDIR'] = tmpdir.name
try:
if options.only_environment:
for name, value in env.items():
print('{}={}'.format(name, shlex.quote(value)))
print('export {}'.format(name))
else:
exit(subprocess.call(args, close_fds=False, env=env))
except subprocess.CalledProcessError as e:
exit(e.returncode)