mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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130 lines
4.5 KiB
Python
Executable file
130 lines
4.5 KiB
Python
Executable file
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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#
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# Copyright © 2018 Thibault Saunier <tsaunier@igalia.com>
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#
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# This library is free software; you can redistribute it and/or modify it under
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# the terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation; either version 2.1 of the License, or (at your option)
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# any later version.
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#
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# This library is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this library. If not, see <http://www.gnu.org/licenses/>.
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import argparse
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import json
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import os
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import sys
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import subprocess
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import tempfile
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from collections import OrderedDict
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try:
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from collections.abc import Mapping
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except ImportError: # python <3.3
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from collections import Mapping
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# Marks values in the json file as "unstable" so that they are
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# not updated automatically, this aims at making the cache file
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# stable and handle corner cases were we can't automatically
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# make it happen. For properties, the best way is to use th
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# GST_PARAM_DOC_SHOW_DEFAULT flag.
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UNSTABLE_VALUE = "unstable-values"
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def dict_recursive_update(d, u):
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modified = False
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unstable_values = d.get(UNSTABLE_VALUE, [])
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if not isinstance(unstable_values, list):
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unstable_values = [unstable_values]
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for k, v in u.items():
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if isinstance(v, Mapping):
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r = d.get(k, {})
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modified |= dict_recursive_update(r, v)
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d[k] = r
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elif k not in unstable_values:
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d[k] = u[k]
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modified = True
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return modified
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def test_unstable_values():
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current_cache = { "v1": "yes", "unstable-values": "v1"}
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new_cache = { "v1": "no" }
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assert(dict_recursive_update(current_cache, new_cache) == False)
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new_cache = { "v1": "no", "unstable-values": "v2" }
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assert(dict_recursive_update(current_cache, new_cache) == True)
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current_cache = { "v1": "yes", "v2": "yay", "unstable-values": "v1",}
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new_cache = { "v1": "no" }
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assert(dict_recursive_update(current_cache, new_cache) == False)
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current_cache = { "v1": "yes", "v2": "yay", "unstable-values": "v2"}
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new_cache = { "v1": "no", "v2": "unstable" }
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assert (dict_recursive_update(current_cache, new_cache) == True)
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assert (current_cache == { "v1": "no", "v2": "yay", "unstable-values": "v2" })
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if __name__ == "__main__":
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cache_filename = sys.argv[1]
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output_filename = sys.argv[2]
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build_root = os.environ.get('MESON_BUILD_ROOT', '')
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subenv = os.environ.copy()
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cache = {}
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try:
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with open(cache_filename, newline='\n') as f:
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cache = json.load(f)
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except FileNotFoundError:
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pass
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out = output_filename + '.tmp'
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cmd = [os.path.join(os.path.dirname(os.path.realpath(__file__)), 'gst-hotdoc-plugins-scanner'), out]
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gst_plugins_paths = []
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for plugin_path in sys.argv[3:]:
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cmd.append(plugin_path)
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gst_plugins_paths.append(os.path.dirname(plugin_path))
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try:
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with open(os.path.join(build_root, 'GstPluginsPath.json'), newline='\n') as f:
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plugin_paths = os.pathsep.join(json.load(f))
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except FileNotFoundError:
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plugin_paths = ""
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if plugin_paths:
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subenv['GST_PLUGIN_PATH'] = subenv.get('GST_PLUGIN_PATH', '') + ':' + plugin_paths
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# Hide stderr unless an actual error happens as we have cases where we get g_warnings
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# and other issues because plugins are being built while `gst_init` is called
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stderrlogfile = output_filename + '.stderr'
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with open(stderrlogfile, 'w') as log:
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try:
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data = subprocess.check_output(cmd, env=subenv, stderr=log)
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except subprocess.CalledProcessError as e:
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log.flush()
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with open(stderrlogfile, 'r') as f:
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print(f.read(), file=sys.stderr)
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raise
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with open(out, 'r') as jfile:
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try:
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plugins = json.load(jfile, object_pairs_hook=OrderedDict)
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except json.decoder.JSONDecodeError:
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print("Could not decode:\n%s" % jfile.read(), file=sys.stderr)
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raise
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modified = dict_recursive_update(cache, plugins)
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with open(output_filename, 'w', newline='\n') as f:
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json.dump(cache, f, indent=4, sort_keys=True)
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if modified:
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with open(cache_filename, 'w', newline='\n') as f:
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json.dump(cache, f, indent=4, sort_keys=True)
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