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