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gstreamer/gst-env.py

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#!/usr/bin/env python3
import argparse
import glob
import json
import os
import platform
import re
import shlex
import shutil
import subprocess
import tempfile
import pathlib
import signal
from functools import lru_cache
from pathlib import PurePath, Path
from sys import exit
from typing import Any
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
BC_RC = '''
BASH_COMPLETION_SCRIPTS="{bash_completions}"
BASH_COMPLETION_PATHS="{bash_completions_paths}"
for p in $BASH_COMPLETION_PATHS; do
for f in $BASH_COMPLETION_SCRIPTS; do
[ -f "$p/$f" ] && . "$p/$f"
done
done
'''
BASH_COMPLETION_PATHS = [SCRIPTDIR + '/subprojects/gstreamer/data/bash-completion/completions']
BASH_COMPLETION_PATHS += [SCRIPTDIR + '/subprojects/gst-devtools/validate/data/bash-completion/completions']
def str_to_bool(value: Any) -> bool:
"""Return whether the provided string (or any value really) represents true. Otherwise false.
Just like plugin server stringToBoolean.
"""
if not value:
return False
return str(value).lower() in ("y", "yes", "t", "true", "on", "1")
def listify(o):
if isinstance(o, str):
return [o]
if isinstance(o, list):
return o
raise AssertionError('Object {!r} must be a string or a list'.format(o))
def stringify(o):
if isinstance(o, str):
return o
if isinstance(o, list):
if len(o) == 1:
return o[0]
raise AssertionError('Did not expect object {!r} to have more than one element'.format(o))
raise AssertionError('Object {!r} must be a string or a list'.format(o))
def prepend_env_var(env, var, value, sysroot):
if var is None:
return
if value.startswith(sysroot):
value = value[len(sysroot):]
# Try not to exceed maximum length limits for env vars on Windows
if os.name == 'nt':
value = win32_get_short_path_name(value)
env_val = env.get(var, '')
val = os.pathsep + value + os.pathsep
# Don't add the same value twice
if val in env_val or env_val.startswith(value + os.pathsep):
return
env[var] = val + env_val
env[var] = env[var].replace(os.pathsep + os.pathsep, os.pathsep).strip(os.pathsep)
def get_target_install_filename(target, filename):
'''
Checks whether this file is one of the files installed by the target
'''
basename = os.path.basename(filename)
for install_filename in listify(target['install_filename']):
if install_filename.endswith(basename):
return install_filename
return None
def get_pkgconfig_variable_from_pcfile(pcfile, varname):
variables = {}
substre = re.compile(r'\$\{[^${}]+\}')
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 is_bash_completion_available(options):
return os.path.exists(os.path.join(options.builddir, 'subprojects/gstreamer/data/bash-completion/helpers/gst'))
def get_subprocess_env(options, gst_version):
env = os.environ.copy()
env["CURRENT_GST"] = os.path.normpath(SCRIPTDIR)
env["GST_VERSION"] = gst_version
prepend_env_var(env, "GST_VALIDATE_SCENARIOS_PATH", os.path.normpath(
"%s/subprojects/gst-devtools/validate/data/scenarios" % SCRIPTDIR),
options.sysroot)
env["GST_VALIDATE_PLUGIN_PATH"] = os.path.normpath(
"%s/subprojects/gst-devtools/validate/plugins" % options.builddir)
prepend_env_var(env, "GST_VALIDATE_APPS_DIR", os.path.normpath(
"%s/subprojects/gst-editing-services/tests/validate" % SCRIPTDIR),
options.sysroot)
env["GST_ENV"] = 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)
prepend_env_var(env, "GST_VALIDATE_SCENARIOS_PATH", os.path.normpath(
"%s/subprojects/gst-examples/webrtc/check/validate/scenarios" %
SCRIPTDIR), options.sysroot)
prepend_env_var(env, "GST_VALIDATE_APPS_DIR", os.path.normpath(
"%s/subprojects/gst-examples/webrtc/check/validate/apps" %
SCRIPTDIR), 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/ptp/gst-ptp-helper" % options.builddir)
if os.name == 'nt':
lib_path_envvar = 'PATH'
elif platform.system() == 'Darwin':
# DYLD_LIBRARY_PATH is stripped when new shells are spawned and can
# cause issues with runtime linker resolution, so only set it when
# using --only-environment
lib_path_envvar = None
if options.only_environment:
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, 'scripts'),
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)
# plugin scanner and generator
prepend_env_var(env, "PATH", os.path.join(options.builddir, 'subprojects',
'gstreamer', 'docs'),
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)
# Search for the Plugin paths file either in the build directory root
# or check if gstreamer is a subproject of another project
for sub_directories in [[], ['subprojects', 'gstreamer']]:
plugin_paths = os.path.join(options.builddir, *sub_directories, 'GstPluginsPath.json')
if os.path.exists(plugin_paths):
with open(plugin_paths) as f:
for plugin_path in json.load(f):
prepend_env_var(env, 'GST_PLUGIN_PATH', plugin_path,
options.sysroot)
break
# 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()
python_dirs = setup_gdb(options)
overrides_dirs = set()
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
# 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.
py_package = None
if 'site-packages' in installpath_parts:
py_package = 'site-packages'
elif 'dist-packages' in installpath_parts:
py_package = 'dist-packages'
if py_package:
install_subpath = os.path.join(*installpath_parts[installpath_parts.index(py_package) + 1:])
if path.endswith(install_subpath):
if os.path.commonprefix(["gi/overrides", install_subpath]):
overrides_dirs.add(os.path.dirname(path))
else:
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), '..')))
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)
# 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)
for python_dir in sorted(overrides_dirs):
prepend_env_var(env, '_GI_OVERRIDES_PATH', 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)
# Ensure that gst-python/gi is used first
prepend_env_var(env, "PYTHONPATH", os.path.join(SCRIPTDIR, 'subprojects', 'gst-python'),
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',
os.path.join(SCRIPTDIR, 'data', 'misc', '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 os.name == 'nt':
shell = get_windows_shell()
if shell in ['powershell.exe', 'pwsh.exe']:
new_args = [shell, '-NoLogo']
if not args:
prompt = 'function global:prompt { "[' + gst_version + '"+"] PS " + $PWD + "> "}'
new_args += ['-NoExit', '-Command', prompt]
else:
new_args += ['-NonInteractive', '-Command'] + args
args = new_args
else:
new_args = [os.environ.get("COMSPEC", r"C:\WINDOWS\system32\cmd.exe")]
if not args:
new_args += ['/k', 'prompt [{}] $P$G'.format(gst_version)]
else:
new_args += ['/c', 'start', '/b', '/wait'] + args
args = new_args
if not args:
if os.name != 'nt':
args = [os.environ.get("SHELL", os.path.realpath("/bin/sh"))]
prompt_export = f'export PS1="[{gst_version}] $PS1"'
if args[0].endswith('bash') and not str_to_bool(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('\n' + prompt_export)
tmprc.flush()
if is_bash_completion_available(options):
bash_completions_files = []
for p in BASH_COMPLETION_PATHS:
if os.path.exists(p):
bash_completions_files += os.listdir(path=p)
bc_rc = BC_RC.format(bash_completions=' '.join(bash_completions_files), bash_completions_paths=' '.join(BASH_COMPLETION_PATHS))
tmprc.write(bc_rc)
tmprc.flush()
args.append("--rcfile")
args.append(tmprc.name)
elif args[0].endswith('fish'):
prompt_export = None # FIXME
# 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 '[{}] '(original_fish_prompt)
end'''.format(gst_version)
args.append(prompt_cmd)
elif args[0].endswith('zsh'):
prompt_export = f'export PROMPT="[{gst_version}] $PROMPT"'
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('\n' + prompt_export)
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))
if prompt_export:
print(prompt_export)
else:
if os.environ.get("CI_PROJECT_NAME"):
print("Ignoring SIGINT when running on the CI,"
" as we get spurious sigint in there for some reason.")
signal.signal(signal.SIGINT, signal.SIG_IGN)
exit(subprocess.call(args, close_fds=False, env=env))
except subprocess.CalledProcessError as e:
exit(e.returncode)
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