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# Copyright 2023 The Servo Project Developers. See the COPYRIGHT
# file at the top-level directory of this distribution.
#
# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
# option. This file may not be copied, modified, or distributed
# except according to those terms.
import os
import subprocess
from typing import Dict, Optional
from .. import util
class Base:
def __init__(self, triple: str):
self.environ = os.environ.copy()
self.triple = triple
self.is_windows = False
self.is_linux = False
self.is_macos = False
def set_gstreamer_environment_variables_if_necessary(
self, env: Dict[str, str], cross_compilation_target: Optional[str], check_installation=True
):
# Environment variables are not needed when cross-compiling on any
# platform other than Windows. UWP doesn't support GStreamer. GStreamer
# for Android is handled elsewhere.
if cross_compilation_target and (
not self.is_windows
or "uwp" in cross_compilation_target
or "android" in cross_compilation_target
):
return
# We may not need to update environment variables if GStreamer is installed
# for the system on Linux.
gstreamer_root = self.gstreamer_root(cross_compilation_target)
if gstreamer_root:
util.prepend_paths_to_env(env, "PATH", os.path.join(gstreamer_root, "bin"))
util.prepend_paths_to_env(
env, "PKG_CONFIG_PATH", os.path.join(gstreamer_root, "lib", "pkgconfig")
)
util.prepend_paths_to_env(
env,
self.library_path_variable_name(),
os.path.join(gstreamer_root, "lib"),
)
env["GST_PLUGIN_SCANNER"] = os.path.join(
gstreamer_root,
"libexec",
"gstreamer-1.0",
f"gst-plugin-scanner{self.executable_suffix()}",
)
env["GST_PLUGIN_SYSTEM_PATH"] = os.path.join(gstreamer_root, "lib", "gstreamer-1.0")
if self.is_macos:
env["OPENSSL_INCLUDE_DIR"] = os.path.join(gstreamer_root, "Headers")
# If we are not cross-compiling GStreamer must be installed for the system. In
# the cross-compilation case, we might be picking it up from another directory.
if check_installation and not self.is_gstreamer_installed(cross_compilation_target):
raise FileNotFoundError(
"GStreamer libraries not found (>= version 1.16)."
"Please see installation instructions in README.md"
)
def gstreamer_root(self, _cross_compilation_target: Optional[str]) -> Optional[str]:
raise NotImplementedError("Do not know how to get GStreamer path for platform.")
def library_path_variable_name(self):
raise NotImplementedError("Do not know how to set library path for platform.")
def executable_suffix(self):
return ""
def _platform_bootstrap(self, _cache_dir: str, _force: bool) -> bool:
raise NotImplementedError("Bootstrap installation detection not yet available.")
def _platform_bootstrap_gstreamer(self, _force: bool) -> bool:
raise NotImplementedError(
"GStreamer bootstrap support is not yet available for your OS."
)
def is_gstreamer_installed(self, cross_compilation_target: Optional[str]) -> bool:
env = os.environ.copy()
self.set_gstreamer_environment_variables_if_necessary(
env, cross_compilation_target, check_installation=False)
return (
subprocess.call(
["pkg-config", "--atleast-version=1.16", "gstreamer-1.0"],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
env=env,
)
== 0
)
def bootstrap(self, cache_dir: str, force: bool):
if not self._platform_bootstrap(cache_dir, force):
print("Dependencies were already installed!")
def bootstrap_gstreamer(self, _cache_dir: str, force: bool):
if not self._platform_bootstrap_gstreamer(force):
root = self.gstreamer_root(None)
if root:
print(f"GStreamer found at: {root}")
else:
print("GStreamer already installed system-wide.")
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