gst-uninstalled.py

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