def isRunnable(self, entry_point=None): # fold>>
"""
@description checks runnability conditions.
@description A package is runnable for a given entry point when the following conditions are met:
@description - there is an executable group with that entry point
@description - the executable exists for the current platform and is executable
@description - if an interpreter is declared, the interpreter can be found and is executable
"""
if self.__is_zipped:
self._unpack()
# if we have no executables, it is quickly said
if len(self.__manifest.executableGroupList()) == 0:
return False
# try with the default entry point if not provided
if entry_point is None:
entry_point = self.defaultExecutableGroupEntryPoint()
# no default? then we know the answer
if entry_point is None:
return False
executable_group = self.__manifest.executableGroup(entry_point)
if executable_group is None:
return False
# try with the executable for the current platform. If not found, try with something that is supported
executable = executable_group.executable(Platform.currentPlatform())
if executable is None:
# try to see if there's an executable that can run on this platform
for exe in executable_group.executableList():
if Platform.isCompatibleWith(exe.platform()):
executable = exe
break
# still none? we rest our case
if executable is None:
return False
# check for the existence of the file as specified in the path
executable_absolute_path = _computeExecutableAbsolutePath(self.rootDir(), executable.path(), executable.pathType(), executable.platform())
if not os.path.exists(executable_absolute_path):
return False
# check if the executable is interpreted, and in this case, if the interpreter can be found and executed
interpreter = executable.interpreter()
if interpreter is not None:
interpreter_path=_which(interpreter)
if interpreter_path is None:
return False
if not _isExecutable(interpreter_path):
return False
else:
# not interpreted, check the executability of the file itself
if not _isExecutable(executable_absolute_path):
return False
# looks like there are chances it can be executable, after all
return True
def runEntryPoint(self, entry_point, arguments=None, environment=None): # fold>>
"""
@description runs the platform specific executable with a given entry poin, or a compatible
@description platform specific/aspecific code under the same entry point.
@description The function never returns. The executable runs with an execve call which
@description replaces the current executable with the new executable. If you want to fork, you
@description have to do it before calling run()
"""
if self.__is_zipped:
self._unpack()
if not self.isRunnable(entry_point):
raise NotRunnableException("Entry point "+entry_point+" is not runnable.")
if arguments is None:
arguments=[]
if environment is None:
environment = os.environ
# add the environment variable containing the package base directory.
# we use this and not os.setenv because os.setenv does not export to child processes.
environment["PACKAGE_ROOT_DIR"]=self.rootDir()
environment["CN_ROOT_DIR"]=self.rootDir()
environment["CN_ENTRY_POINT"] = entry_point
# FIXME: this code is heavily repeated. refactor it out!
executable_group = self.__manifest.executableGroup(entry_point)
executable = executable_group.executable(Platform.currentPlatform())
if executable is None:
# try to see if there's an executable that can run on this platform
for exe in executable_group.executableList():
if Platform.isCompatibleWith(exe.platform()):
executable = exe
break
environment["CN_RUN_ARCH"]=executable.platform()
executable_absolute_path = _computeExecutableAbsolutePath(self.rootDir(), executable.path(), executable.pathType(), executable.platform())
interpreter = executable.interpreter()
if interpreter is not None:
interpreter_path=_which(interpreter)
os.execve(interpreter_path, [interpreter_path, executable_absolute_path]+list(arguments), environment)
else:
os.execve(executable_absolute_path,[executable_absolute_path]+list(arguments), environment)
def executableAbsolutePath(self, entry_point): # fold>>
if self.__is_zipped:
self._unpack()
platform = Platform.currentPlatform()
group = self.__manifest.executableGroup(entry_point)
if group is None:
return None
executable = group.executable(platform)
if executable is not None:
return _computeExecutableAbsolutePath(self.rootDir(), executable.path(), executable.pathType(), platform)
# look for something compatible
for executable in group.executableList():
if Platform.isCompatibleWith(executable.platform()):
return _computeExecutableAbsolutePath(self.rootDir(), executable.path(), executable.pathType(), executable.platform())
return None
def resourceAbsolutePath(self, entry_point): # fold>>
if self.__is_zipped:
self._unpack()
platform = Platform.currentPlatform()
group = self.__manifest.resourceGroup(entry_point)
if group is None:
return None
resource = group.resource(platform)
if resource is not None:
return _computeResourceAbsolutePath(self.rootDir(), resource.path(), resource.pathType(), platform)
# look for something compatible
for resource in group.resourceList():
if Platform.isCompatibleWith(resource.platform()):
return _computeResourceAbsolutePath(self.rootDir(), resource.path(), resource.pathType(), resource.platform())
return None
