aiida.transports package#

Module for classes and utilities to define transports to other machines.

Submodules#

Common cli utilities for transport plugins.

aiida.transports.cli.common_params(command_func)[source]#

Decorate a command function with common click parameters for all transport plugins.

aiida.transports.cli.configure_computer_main(computer, user, **kwargs)[source]#

Configure a computer via the CLI.

aiida.transports.cli.create_configure_cmd(transport_type)[source]#

Create verdi computer configure subcommand for a transport type.

aiida.transports.cli.create_option(name, spec)[source]#

Create a click option from a name and partial specs as used in transport auth_options.

aiida.transports.cli.interactive_default(key, also_non_interactive=False)[source]#

Create a contextual_default value callback for an auth_param key.

Parameters
  • key – the name of the option.

  • also_non_interactive – indicates whether this option should provide a default also in non-interactive mode. If False, the option will raise MissingParameter if no explicit value is specified when the command is called in non-interactive mode.

aiida.transports.cli.list_transport_options(transport_type)[source]#
aiida.transports.cli.match_comp_transport(ctx, param, computer, transport_type)[source]#

Check the computer argument against the transport type.

aiida.transports.cli.transport_option_default(name, computer)[source]#

Determine the default value for an auth_param key.

aiida.transports.cli.transport_options(transport_type)[source]#

Decorate a command with all options for a computer configure subcommand for transport_type.

Transport interface.

class aiida.transports.transport.Transport(*args, **kwargs)[source]#

Bases: abc.ABC

Abstract class for a generic transport (ssh, local, …) contains the set of minimal methods.

DEFAULT_MINIMUM_JOB_POLL_INTERVAL = 10#
_DEFAULT_SAFE_OPEN_INTERVAL = 30.0#
_MAGIC_CHECK = re.compile('[*?[]')#
__abstractmethods__ = frozenset({'_exec_command_internal', 'chdir', 'chmod', 'chown', 'close', 'copy', 'copyfile', 'copytree', 'exec_command_wait_bytes', 'get', 'get_attribute', 'getcwd', 'getfile', 'gettree', 'gotocomputer_command', 'isdir', 'isfile', 'listdir', 'makedirs', 'mkdir', 'normalize', 'open', 'path_exists', 'put', 'putfile', 'puttree', 'remove', 'rename', 'rmdir', 'rmtree', 'symlink'})#
__dict__ = mappingproxy({'__module__': 'aiida.transports.transport', '__doc__': 'Abstract class for a generic transport (ssh, local, ...) contains the set of minimal methods.', 'DEFAULT_MINIMUM_JOB_POLL_INTERVAL': 10, '_DEFAULT_SAFE_OPEN_INTERVAL': 30.0, '_valid_auth_params': None, '_MAGIC_CHECK': re.compile('[*?[]'), '_valid_auth_options': [], '_common_auth_options': [('use_login_shell', {'default': True, 'switch': True, 'prompt': 'Use login shell when executing command', 'help': ' Not using a login shell can help suppress potential spurious text output that can prevent AiiDA from parsing the output of commands, but may result in some startup files (.profile) not being sourced.', 'non_interactive_default': True}), ('safe_interval', {'type': <class 'float'>, 'prompt': 'Connection cooldown time (s)', 'help': 'Minimum time interval in seconds between opening new connections.', 'callback': <function validate_positive_number>})], '__init__': <function Transport.__init__>, '__enter__': <function Transport.__enter__>, '__exit__': <function Transport.__exit__>, 'is_open': <property object>, 'open': <function Transport.open>, 'close': <function Transport.close>, '__repr__': <function Transport.__repr__>, '__str__': <function Transport.__str__>, 'set_logger_extra': <function Transport.set_logger_extra>, 'get_short_doc': <classmethod object>, 'get_valid_auth_params': <classmethod object>, 'auth_options': <aiida.common.lang.classproperty object>, '_get_safe_interval_suggestion_string': <classmethod object>, '_get_use_login_shell_suggestion_string': <classmethod object>, 'logger': <property object>, 'get_safe_open_interval': <function Transport.get_safe_open_interval>, 'chdir': <function Transport.chdir>, 'chmod': <function Transport.chmod>, 'chown': <function Transport.chown>, 'copy': <function Transport.copy>, 'copyfile': <function Transport.copyfile>, 'copytree': <function Transport.copytree>, 'copy_from_remote_to_remote': <function Transport.copy_from_remote_to_remote>, '_exec_command_internal': <function Transport._exec_command_internal>, 'exec_command_wait_bytes': <function Transport.exec_command_wait_bytes>, 'exec_command_wait': <function Transport.exec_command_wait>, 'get': <function Transport.get>, 'getfile': <function Transport.getfile>, 'gettree': <function Transport.gettree>, 'getcwd': <function Transport.getcwd>, 'get_attribute': <function Transport.get_attribute>, 'get_mode': <function Transport.get_mode>, 'isdir': <function Transport.isdir>, 'isfile': <function Transport.isfile>, 'listdir': <function Transport.listdir>, 'listdir_withattributes': <function Transport.listdir_withattributes>, 'makedirs': <function Transport.makedirs>, 'mkdir': <function Transport.mkdir>, 'normalize': <function Transport.normalize>, 'put': <function Transport.put>, 'putfile': <function Transport.putfile>, 'puttree': <function Transport.puttree>, 'remove': <function Transport.remove>, 'rename': <function Transport.rename>, 'rmdir': <function Transport.rmdir>, 'rmtree': <function Transport.rmtree>, 'gotocomputer_command': <function Transport.gotocomputer_command>, 'symlink': <function Transport.symlink>, 'whoami': <function Transport.whoami>, 'path_exists': <function Transport.path_exists>, 'glob': <function Transport.glob>, 'iglob': <function Transport.iglob>, 'glob1': <function Transport.glob1>, 'glob0': <function Transport.glob0>, 'has_magic': <function Transport.has_magic>, '_gotocomputer_string': <function Transport._gotocomputer_string>, '__dict__': <attribute '__dict__' of 'Transport' objects>, '__weakref__': <attribute '__weakref__' of 'Transport' objects>, '__abstractmethods__': frozenset({'isfile', 'normalize', 'put', 'open', 'chdir', 'path_exists', 'getfile', 'get_attribute', 'makedirs', 'rmdir', 'gettree', 'close', 'copy', 'exec_command_wait_bytes', 'copyfile', '_exec_command_internal', 'chown', 'listdir', 'gotocomputer_command', 'putfile', 'chmod', 'rename', 'puttree', 'remove', 'rmtree', 'symlink', 'get', 'mkdir', 'isdir', 'getcwd', 'copytree'}), '_abc_impl': <_abc_data object>, '__annotations__': {}})#
__enter__()[source]#

For transports that require opening a connection, opens all required channels (used in ‘with’ statements).

This object can be used in nested with statements and the connection will only be opened once and closed when the final with scope finishes e.g.:

t = Transport()
with t:
    # Connection is now open..
    with t:
        # ..still open..
        pass
    # ..still open..
# ...closed
__exit__(type_, value, traceback)[source]#

Closes connections, if needed (used in ‘with’ statements).

__init__(*args, **kwargs)[source]#

__init__ method of the Transport base class.

Parameters
  • safe_interval – (optional, default self._DEFAULT_SAFE_OPEN_INTERVAL) Minimum time interval in seconds between opening new connections.

  • use_login_shell – (optional, default True) if False, do not use a login shell when executing command

__module__ = 'aiida.transports.transport'#
__repr__()[source]#

Return repr(self).

__str__()[source]#

Return str(self).

__weakref__#

list of weak references to the object (if defined)

_abc_impl = <_abc_data object>#
_common_auth_options = [('use_login_shell', {'default': True, 'switch': True, 'prompt': 'Use login shell when executing command', 'help': ' Not using a login shell can help suppress potential spurious text output that can prevent AiiDA from parsing the output of commands, but may result in some startup files (.profile) not being sourced.', 'non_interactive_default': True}), ('safe_interval', {'type': <class 'float'>, 'prompt': 'Connection cooldown time (s)', 'help': 'Minimum time interval in seconds between opening new connections.', 'callback': <function validate_positive_number>})]#
abstract _exec_command_internal(command, **kwargs)[source]#

Execute the command on the shell, similarly to os.system.

Enforce the execution to be run from the cwd (as given by self.getcwd), if this is not None.

If possible, use the higher-level exec_command_wait function.

Parameters

command (str) – execute the command given as a string

Returns

stdin, stdout, stderr and the session, when this exists (can be None).

classmethod _get_safe_interval_suggestion_string(computer)[source]#

Return as a suggestion the default safe interval of this Transport class.

This is used to provide a default in verdi computer configure.

classmethod _get_use_login_shell_suggestion_string(computer)[source]#

Return a suggestion for the specific field.

_gotocomputer_string(remotedir)[source]#

command executed when goto computer.

_valid_auth_options = []#
_valid_auth_params = None#
auth_options = {'safe_interval': {'callback': <function validate_positive_number>, 'help': 'Minimum time interval in seconds between opening new connections.', 'prompt': 'Connection cooldown time (s)', 'type': <class 'float'>}, 'use_login_shell': {'default': True, 'help': ' Not using a login shell can help suppress potential spurious text output that can prevent AiiDA from parsing the output of commands, but may result in some startup files (.profile) not being sourced.', 'non_interactive_default': True, 'prompt': 'Use login shell when executing command', 'switch': True}}#
abstract chdir(path)[source]#

Change directory to ‘path’

Parameters

path (str) – path to change working directory into.

Raises

IOError, if the requested path does not exist

Return type

str

abstract chmod(path, mode)[source]#

Change permissions of a path.

Parameters
  • path (str) – path to file

  • mode (int) – new permissions

abstract chown(path, uid, gid)[source]#

Change the owner (uid) and group (gid) of a file. As with python’s os.chown function, you must pass both arguments, so if you only want to change one, use stat first to retrieve the current owner and group.

Parameters
  • path (str) – path to the file to change the owner and group of

  • uid (int) – new owner’s uid

  • gid (int) – new group id

abstract close()[source]#

Closes the local transport channel

abstract copy(remotesource, remotedestination, dereference=False, recursive=True)[source]#

Copy a file or a directory from remote source to remote destination (On the same remote machine)

Parameters
  • remotesource (str) – path of the remote source directory / file

  • remotedestination (str) – path of the remote destination directory / file

  • dereference (bool) – if True copy the contents of any symlinks found, otherwise copy the symlinks themselves

  • recursive (bool) – if True copy directories recursively, otherwise only copy the specified file(s)

Raises

IOError, if one of src or dst does not exist

copy_from_remote_to_remote(transportdestination, remotesource, remotedestination, **kwargs)[source]#

Copy files or folders from a remote computer to another remote computer.

Parameters
  • transportdestination – transport to be used for the destination computer

  • remotesource (str) – path to the remote source directory / file

  • remotedestination (str) – path to the remote destination directory / file

  • kwargs – keyword parameters passed to the call to transportdestination.put, except for ‘dereference’ that is passed to self.get

Note

the keyword ‘dereference’ SHOULD be set to False for the final put (onto the destination), while it can be set to the value given in kwargs for the get from the source. In that way, a symbolic link would never be followed in the final copy to the remote destination. That way we could avoid getting unknown (potentially malicious) files into the destination computer. HOWEVER, since dereference=False is currently NOT supported by all plugins, we still force it to True for the final put.

Note

the supported keys in kwargs are callback, dereference, overwrite and ignore_nonexisting.

abstract copyfile(remotesource, remotedestination, dereference=False)[source]#

Copy a file from remote source to remote destination (On the same remote machine)

Parameters
  • remotesource (str) – path of the remote source directory / file

  • remotedestination (str) – path of the remote destination directory / file

  • dereference (bool) – if True copy the contents of any symlinks found, otherwise copy the symlinks themselves

Raises

IOError – if one of src or dst does not exist

abstract copytree(remotesource, remotedestination, dereference=False)[source]#

Copy a folder from remote source to remote destination (On the same remote machine)

Parameters
  • remotesource (str) – path of the remote source directory / file

  • remotedestination (str) – path of the remote destination directory / file

  • dereference (bool) – if True copy the contents of any symlinks found, otherwise copy the symlinks themselves

Raises

IOError – if one of src or dst does not exist

exec_command_wait(command, stdin=None, encoding='utf-8', **kwargs)[source]#

Executes the specified command and waits for it to finish.

Note

this function also decodes the bytes received into a string with the specified encoding, which is set to be utf-8 by default (for backward-compatibility with earlier versions) of AiiDA. Use this method only if you are sure that you are getting a properly encoded string; otherwise, use the exec_command_wait_bytes method that returns the undecoded byte stream.

Note

additional kwargs are passed to the exec_command_wait_bytes function, that might use them depending on the plugin.

Parameters
  • command – the command to execute

  • stdin – (optional,default=None) can be a string or a file-like object.

  • encoding – the encoding to use to decode the byte stream received from the remote command execution.

Returns

a tuple with (return_value, stdout, stderr) where stdout and stderr are both strings, decoded with the specified encoding.

abstract exec_command_wait_bytes(command, stdin=None, **kwargs)[source]#

Execute the command on the shell, waits for it to finish, and return the retcode, the stdout and the stderr as bytes.

Enforce the execution to be run from the pwd (as given by self.getcwd), if this is not None.

The command implementation can have some additional plugin-specific kwargs.

Parameters
  • command (str) – execute the command given as a string

  • stdin – (optional,default=None) can be a string or a file-like object.

Returns

a tuple: the retcode (int), stdout (bytes) and stderr (bytes).

abstract get(remotepath, localpath, *args, **kwargs)[source]#

Retrieve a file or folder from remote source to local destination dst must be an absolute path (src not necessarily)

Parameters
  • remotepath – (str) remote_folder_path

  • localpath – (str) local_folder_path

abstract get_attribute(path)[source]#

Return an object FixedFieldsAttributeDict for file in a given path, as defined in aiida.common.extendeddicts Each attribute object consists in a dictionary with the following keys:

  • st_size: size of files, in bytes

  • st_uid: user id of owner

  • st_gid: group id of owner

  • st_mode: protection bits

  • st_atime: time of most recent access

  • st_mtime: time of most recent modification

Parameters

path (str) – path to file

Returns

object FixedFieldsAttributeDict

get_mode(path)[source]#

Return the portion of the file’s mode that can be set by chmod().

Parameters

path (str) – path to file

Returns

the portion of the file’s mode that can be set by chmod()

get_safe_open_interval()[source]#

Get an interval (in seconds) that suggests how long the user should wait between consecutive calls to open the transport. This can be used as a way to get the user to not swamp a limited number of connections, etc. However it is just advisory.

If returns 0, it is taken that there are no reasons to limit the frequency of open calls.

In the main class, it returns a default value (>0 for safety), set in the _DEFAULT_SAFE_OPEN_INTERVAL attribute of the class. Plugins should override it.

Returns

The safe interval between calling open, in seconds

Return type

float

classmethod get_short_doc()[source]#

Return the first non-empty line of the class docstring, if available

classmethod get_valid_auth_params()[source]#

Return the internal list of valid auth_params

abstract getcwd()[source]#

Get working directory

Returns

a string identifying the current working directory

abstract getfile(remotepath, localpath, *args, **kwargs)[source]#

Retrieve a file from remote source to local destination dst must be an absolute path (src not necessarily)

Parameters
  • remotepath (str) – remote_folder_path

  • localpath (str) – local_folder_path

abstract gettree(remotepath, localpath, *args, **kwargs)[source]#

Retrieve a folder recursively from remote source to local destination dst must be an absolute path (src not necessarily)

Parameters
  • remotepath (str) – remote_folder_path

  • localpath (str) – local_folder_path

glob(pathname)[source]#

Return a list of paths matching a pathname pattern.

The pattern may contain simple shell-style wildcards a la fnmatch.

glob0(dirname, basename)[source]#

Wrap basename i a list if it is empty or if dirname/basename is an existing path, else return empty list.

glob1(dirname, pattern)[source]#

Match subpaths of dirname against pattern.

abstract gotocomputer_command(remotedir)[source]#

Return a string to be run using os.system in order to connect via the transport to the remote directory.

Expected behaviors:

  • A new bash session is opened

  • A reasonable error message is produced if the folder does not exist

Parameters

remotedir (str) – the full path of the remote directory

has_magic(string)[source]#
iglob(pathname)[source]#

Return an iterator which yields the paths matching a pathname pattern.

The pattern may contain simple shell-style wildcards a la fnmatch.

property is_open#
abstract isdir(path)[source]#

True if path is an existing directory.

Parameters

path (str) – path to directory

Returns

boolean

abstract isfile(path)[source]#

Return True if path is an existing file.

Parameters

path (str) – path to file

Returns

boolean

abstract listdir(path='.', pattern=None)[source]#

Return a list of the names of the entries in the given path. The list is in arbitrary order. It does not include the special entries ‘.’ and ‘..’ even if they are present in the directory.

Parameters
  • path (str) – path to list (default to ‘.’)

  • pattern (str) – if used, listdir returns a list of files matching filters in Unix style. Unix only.

Returns

a list of strings

listdir_withattributes(path='.', pattern=None)[source]#

Return a list of the names of the entries in the given path. The list is in arbitrary order. It does not include the special entries ‘.’ and ‘..’ even if they are present in the directory.

Parameters
  • path (str) – path to list (default to ‘.’)

  • pattern (str) – if used, listdir returns a list of files matching filters in Unix style. Unix only.

Returns

a list of dictionaries, one per entry. The schema of the dictionary is the following:

{
   'name': String,
   'attributes': FileAttributeObject,
   'isdir': Bool
}

where ‘name’ is the file or folder directory, and any other information is metadata (if the file is a folder, a directory, …). ‘attributes’ behaves as the output of transport.get_attribute(); isdir is a boolean indicating if the object is a directory or not.

property logger#

Return the internal logger. If you have set extra parameters using set_logger_extra(), a suitable LoggerAdapter instance is created, bringing with itself also the extras.

abstract makedirs(path, ignore_existing=False)[source]#

Super-mkdir; create a leaf directory and all intermediate ones. Works like mkdir, except that any intermediate path segment (not just the rightmost) will be created if it does not exist.

Parameters
  • path (str) – directory to create

  • ignore_existing (bool) – if set to true, it doesn’t give any error if the leaf directory does already exist

Raises

OSError, if directory at path already exists

abstract mkdir(path, ignore_existing=False)[source]#

Create a folder (directory) named path.

Parameters
  • path (str) – name of the folder to create

  • ignore_existing (bool) – if True, does not give any error if the directory already exists

Raises

OSError, if directory at path already exists

abstract normalize(path='.')[source]#

Return the normalized path (on the server) of a given path. This can be used to quickly resolve symbolic links or determine what the server is considering to be the “current folder”.

Parameters

path (str) – path to be normalized

Raises

IOError – if the path can’t be resolved on the server

abstract open()[source]#

Opens a local transport channel

abstract path_exists(path)[source]#

Returns True if path exists, False otherwise.

abstract put(localpath, remotepath, *args, **kwargs)[source]#

Put a file or a directory from local src to remote dst. src must be an absolute path (dst not necessarily)) Redirects to putfile and puttree.

Parameters
  • localpath (str) – absolute path to local source

  • remotepath (str) – path to remote destination

abstract putfile(localpath, remotepath, *args, **kwargs)[source]#

Put a file from local src to remote dst. src must be an absolute path (dst not necessarily))

Parameters
  • localpath (str) – absolute path to local file

  • remotepath (str) – path to remote file

abstract puttree(localpath, remotepath, *args, **kwargs)[source]#

Put a folder recursively from local src to remote dst. src must be an absolute path (dst not necessarily))

Parameters
  • localpath (str) – absolute path to local folder

  • remotepath (str) – path to remote folder

abstract remove(path)[source]#

Remove the file at the given path. This only works on files; for removing folders (directories), use rmdir.

Parameters

path (str) – path to file to remove

Raises

IOError – if the path is a directory

abstract rename(oldpath, newpath)[source]#

Rename a file or folder from oldpath to newpath.

Parameters
  • oldpath (str) – existing name of the file or folder

  • newpath (str) – new name for the file or folder

Raises
  • IOError – if oldpath/newpath is not found

  • ValueError – if oldpath/newpath is not a valid string

abstract rmdir(path)[source]#

Remove the folder named path. This works only for empty folders. For recursive remove, use rmtree.

Parameters

path (str) – absolute path to the folder to remove

abstract rmtree(path)[source]#

Remove recursively the content at path

Parameters

path (str) – absolute path to remove

set_logger_extra(logger_extra)[source]#

Pass the data that should be passed automatically to self.logger as ‘extra’ keyword. This is typically useful if you pass data obtained using get_dblogger_extra in aiida.orm.utils.log, to automatically log also to the DbLog table.

Parameters

logger_extra – data that you want to pass as extra to the self.logger. To write to DbLog, it should be created by the aiida.orm.utils.log.get_dblogger_extra function. Pass None if you do not want to have extras passed.

Create a symbolic link between the remote source and the remote destination.

Parameters
  • remotesource – remote source

  • remotedestination – remote destination

whoami()[source]#

Get the remote username

Returns

list of username (str), retval (int), stderr (str)

exception aiida.transports.transport.TransportInternalError[source]#

Bases: aiida.common.exceptions.InternalError

Raised if there is a transport error that is raised to an internal error (e.g. a transport method called without opening the channel first).

__module__ = 'aiida.transports.transport'#
aiida.transports.transport.validate_positive_number(ctx, param, value)[source]#

Validate that the number passed to this parameter is a positive number.

Parameters
  • ctx – the click.Context

  • param – the parameter

  • value – the value passed for the parameter

Raises

click.BadParameter – if the value is not a positive number

General utilities for Transport classes.

class aiida.transports.util.FileAttribute(init=None)[source]#

Bases: aiida.common.extendeddicts.FixedFieldsAttributeDict

A class, resembling a dictionary, to describe the attributes of a file, that is returned by get_attribute(). Possible keys: st_size, st_uid, st_gid, st_mode, st_atime, st_mtime

__module__ = 'aiida.transports.util'#
_valid_fields = ('st_size', 'st_uid', 'st_gid', 'st_mode', 'st_atime', 'st_mtime')#
class aiida.transports.util._DetachedProxyCommand(command_line)[source]#

Bases: paramiko.proxy.ProxyCommand

Modifies paramiko’s ProxyCommand by launching the process in a separate process group.

__init__(command_line)[source]#

Create a new CommandProxy instance. The instance created by this class can be passed as an argument to the .Transport class.

Parameters

command_line (str) – the command that should be executed and used as the proxy.

__module__ = 'aiida.transports.util'#
close()[source]#
aiida.transports.util.copy_from_remote_to_remote(transportsource, transportdestination, remotesource, remotedestination, **kwargs)[source]#

Copy files or folders from a remote computer to another remote computer.

Parameters
  • transportsource – transport to be used for the source computer

  • transportdestination – transport to be used for the destination computer

  • remotesource (str) – path to the remote source directory / file

  • remotedestination (str) – path to the remote destination directory / file

  • kwargs – keyword parameters passed to the final put, except for ‘dereference’ that is passed to the initial get

Note

it uses the method transportsource.copy_from_remote_to_remote