gst-uninstalled.py

   1 #!/usr/bin/env python3
   2
   3 import argparse
   4 import json
   5 import os
   6 import platform
   7 import re
   8 import site
   9 import shutil
  10 import subprocess
  11 import sys
  12 import tempfile
  13
  14 from common import get_meson
  15
  16 SCRIPTDIR = os.path.abspath(os.path.dirname(__file__))
  17
  18
  19 def prepend_env_var(env, var, value):
  20     env[var] = os.pathsep + value + os.pathsep + env.get(var, "")
  21     env[var] = env[var].replace(os.pathsep + os.pathsep, os.pathsep).strip(os.pathsep)
  22
  23
  24 def get_subprocess_env(options):
  25     env = os.environ.copy()
  26
  27     prepend_env_var(env, "GST_PLUGIN_PATH", options.builddir)
  28     prepend_env_var(env, "GST_PLUGIN_PATH", os.path.join(SCRIPTDIR, 'subprojects',
  29                                                          'gst-python', 'plugin'))
  30     env["CURRENT_GST"] = os.path.normpath(SCRIPTDIR)
  31     env["GST_VALIDATE_SCENARIOS_PATH"] = os.path.normpath(
  32         "%s/subprojects/gst-devtools/validate/data/scenarios" % SCRIPTDIR)
  33     env["GST_VALIDATE_PLUGIN_PATH"] = os.path.normpath(
  34         "%s/subprojects/gst-devtools/validate/plugins" % options.builddir)
  35     env["GST_VALIDATE_APPS_DIR"] = os.path.normpath(
  36         "%s/subprojects/gst-editing-services/tests/validate" % SCRIPTDIR)
  37     prepend_env_var(env, "PATH", os.path.normpath(
  38         "%s/subprojects/gst-devtools/validate/tools" % options.builddir))
  39     prepend_env_var(env, "PATH", os.path.join(SCRIPTDIR, 'meson'))
  40     env["GST_VERSION"] = options.gst_version
  41     env["GST_ENV"] = 'gst-' + options.gst_version
  42     env["GST_PLUGIN_SYSTEM_PATH"] = ""
  43     env["GST_PLUGIN_SCANNER"] = os.path.normpath(
  44         "%s/subprojects/gstreamer/libs/gst/helpers/gst-plugin-scanner" % options.builddir)
  45     env["GST_PTP_HELPER"] = os.path.normpath(
  46         "%s/subprojects/gstreamer/libs/gst/helpers/gst-ptp-helper" % options.builddir)
  47     env["GST_REGISTRY"] = os.path.normpath(options.builddir + "/registry.dat")
  48
  49     sharedlib_reg = re.compile(r'\.so|\.dylib|\.dll')
  50     typelib_reg = re.compile(r'.*\.typelib$')
  51
  52     if os.name is 'nt':
  53         lib_path_envvar = 'PATH'
  54     elif platform.system() == 'Darwin':
  55         lib_path_envvar = 'DYLD_LIBRARY_PATH'
  56     else:
  57         lib_path_envvar = 'LD_LIBRARY_PATH'
  58
  59     meson, mesonconf, mesonintrospect = get_meson()
  60     targets_s = subprocess.check_output([sys.executable, mesonintrospect, options.builddir, '--targets'])
  61     targets = json.loads(targets_s.decode())
  62     paths = set()
  63     for target in targets:
  64         filename = target['filename']
  65         root = os.path.dirname(filename)
  66         if typelib_reg.search(filename):
  67             prepend_env_var(env, "GI_TYPELIB_PATH",
  68                             os.path.join(options.builddir, root))
  69         elif sharedlib_reg.search(filename):
  70             if target.get('type') != "shared library":
  71                 continue
  72
  73             if os.path.normpath("lib/gstreamer-1.0") in os.path.normpath(target.get('install_filename')):
  74                 continue
  75
  76             prepend_env_var(env, lib_path_envvar,
  77                             os.path.join(options.builddir, root))
  78         elif target.get('type') == 'executable' and target.get('installed'):
  79             paths.add(os.path.join(options.builddir, root))
  80
  81     for p in paths:
  82         prepend_env_var(env, 'PATH', p)
  83
  84     presets = set()
  85     encoding_targets = set()
  86     if '--installed' in subprocess.check_output([mesonintrospect, '-h']).decode():
  87         installed_s = subprocess.check_output([sys.executable, mesonintrospect,
  88                                                options.builddir, '--installed'])
  89         for path, installpath in json.loads(installed_s.decode()).items():
  90             if path.endswith('.prs'):
  91                 presets.add(os.path.dirname(path))
  92             elif path.endswith('.gep'):
  93                 encoding_targets.add(
  94                     os.path.abspath(os.path.join(os.path.dirname(path), '..')))
  95         for p in presets:
  96             prepend_env_var(env, 'GST_PRESET_PATH', p)
  97
  98         for t in encoding_targets:
  99             prepend_env_var(env, 'GST_ENCODING_TARGET_PATH', t)
 100
 101     return env
 102
 103
 104 def python_env(options, unset_env=False):
 105     """
 106     Setup our overrides_hack.py as sitecustomize.py script in user
 107     site-packages if unset_env=False, else unset, previously set
 108     env.
 109     """
 110     subprojects_path = os.path.join(options.builddir, "subprojects")
 111     gst_python_path = os.path.join(SCRIPTDIR, "subprojects", "gst-python")
 112     if not os.path.exists(os.path.join(subprojects_path, "gst-python")) or \
 113             not os.path.exists(gst_python_path):
 114         return False
 115
 116     sitepackages = site.getusersitepackages()
 117     if not sitepackages:
 118         return False
 119
 120     sitecustomize = os.path.join(sitepackages, "sitecustomize.py")
 121     overrides_hack = os.path.join(gst_python_path, "testsuite", "overrides_hack.py")
 122
 123     if not unset_env:
 124         if os.path.exists(sitecustomize):
 125             if os.path.realpath(sitecustomize) == overrides_hack:
 126                 print("Customize user site script already linked to the GStreamer one")
 127                 return False
 128
 129             old_sitecustomize = os.path.join(sitepackages,
 130                                             "old.sitecustomize.gstuninstalled.py")
 131             shutil.move(sitecustomize, old_sitecustomize)
 132         elif not os.path.exists(sitepackages):
 133             os.makedirs(sitepackages)
 134
 135         os.symlink(overrides_hack, sitecustomize)
 136         return os.path.realpath(sitecustomize) == overrides_hack
 137     else:
 138         if not os.path.realpath(sitecustomize) == overrides_hack:
 139             return False
 140
 141         os.remove(sitecustomize)
 142         old_sitecustomize = os.path.join(sitepackages,
 143                                             "old.sitecustomize.gstuninstalled.py")
 144
 145         if os.path.exists(old_sitecustomize):
 146             shutil.move(old_sitecustomize, sitecustomize)
 147
 148         return True
 149
 150
 151 if __name__ == "__main__":
 152     parser = argparse.ArgumentParser(prog="gstreamer-uninstalled")
 153
 154     parser.add_argument("--builddir",
 155                         default=os.path.join(SCRIPTDIR, "build"),
 156                         help="The meson build directory")
 157     parser.add_argument("--gst-version", default="master",
 158                         help="The GStreamer major version")
 159     options, args = parser.parse_known_args()
 160
 161     if not os.path.exists(options.builddir):
 162         print("GStreamer not built in %s\n\nBuild it and try again" %
 163               options.builddir)
 164         exit(1)
 165
 166     if not args:
 167         if os.name is 'nt':
 168             args = [os.environ.get("COMSPEC", r"C:\WINDOWS\system32\cmd.exe")]
 169         else:
 170             args = [os.environ.get("SHELL", os.path.realpath("/bin/sh"))]
 171         if "bash" in args[0]:
 172             bashrc = os.path.expanduser('~/.bashrc')
 173             if os.path.exists(bashrc):
 174                 tmprc = tempfile.NamedTemporaryFile(mode='w')
 175                 with open(bashrc, 'r') as src:
 176                     shutil.copyfileobj(src, tmprc)
 177                 tmprc.write('\nexport PS1="[gst-%s] $PS1"' % options.gst_version)
 178                 tmprc.flush()
 179                 # Let the GC remove the tmp file
 180                 args.append("--rcfile")
 181                 args.append(tmprc.name)
 182     python_set = python_env(options)
 183     try:
 184         exit(subprocess.call(args, env=get_subprocess_env(options)))
 185     except subprocess.CalledProcessError as e:
 186         exit(e.returncode)
 187     finally:
 188         if python_set:
 189             python_env(options, unset_env=True)