Package SCons :: Package Node :: Module FS :: Class Base

Class Base

object --+    
         |    
      Node --+
             |
            Base

Known Subclasses:

A generic class for file system entries. This class is for when we don't know yet whether the entry being looked up is a file or a directory. Instances of this class can morph into either Dir or File objects by a later, more precise lookup.

Note: this class does not define __cmp__ and __hash__ for efficiency reasons. SCons does a lot of comparing of Node.FS.{Base,Entry,File,Dir} objects, so those operations must be as fast as possible, which means we want to use Python's built-in object identity comparisons.

Nested Classes

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Inherited from Node: Attrs, BuildInfo, NodeInfo

Instance Methods

[hide private]

__init__(self, name, directory, fs)
Initialize a generic Node.FS.Base object.

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str_for_display(self)

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must_be_same(self, klass)
This node, which already existed, is being looked up as the specified klass. Raise an exception if it isn't.

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get_dir(self)

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get_suffix(self)

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rfile(self)

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__str__(self)
A Node.FS.Base object's string representation is its path name.

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_save_str(self)

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_get_str(self)

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rstr(self)
A Node.FS.Base object's string representation is its path name.

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stat(self)

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exists(self)
Does this node exists?

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rexists(self)
Does this node exist locally or in a repositiory?

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getmtime(self)

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getsize(self)

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isdir(self)

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isfile(self)

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islink(self)

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is_under(self, dir)

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set_local(self)

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srcnode(self)
If this node is in a build path, return the node corresponding to its source file. Otherwise, return ourself.

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get_path(self, dir=None)
Return path relative to the current working directory of the Node.FS.Base object that owns us.

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set_src_builder(self, builder)
Set the source code builder for this node.

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src_builder(self)
Fetch the source code builder for this node.

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get_abspath(self)
Get the absolute path of the file.

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for_signature(self)
Return a string representation of the Node that will always be the same for this particular Node, no matter what. This is by contrast to the __str__() method, which might, for instance, return a relative path for a file Node. The purpose of this method is to generate a value to be used in signature calculation for the command line used to build a target, and we use this method instead of str() to avoid unnecessary rebuilds. This method does not need to return something that would actually work in a command line; it can return any kind of nonsense, so long as it does not change.

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get_subst_proxy(self)
This method is expected to return an object that will function exactly like this Node, except that it implements any additional special features that we would like to be in effect for Environment variable substitution. The principle use is that some Nodes would like to implement a __getattr__() method, but putting that in the Node type itself has a tendency to kill performance. We instead put it in a proxy and return it from this method. It is legal for this method to return self if no new functionality is needed for Environment substitution.

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target_from_source(self, prefix, suffix, splitext=<function splitext at 0x9af69cc>)
Generates a target entry that corresponds to this entry (usually a source file) with the specified prefix and suffix.

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_Rfindalldirs_key(self, pathlist)

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Rfindalldirs(self, pathlist)
Return all of the directories for a given path list, including corresponding "backing" directories in any repositories.

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RDirs(self, pathlist)
Search for a list of directories in the Repository list.

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rentry(self)

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_glob1(self, pattern, ondisk=True, source=False, strings=False)

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Inherited from Node: Decider, add_dependency, add_ignore, add_prerequisite, add_source, add_to_implicit, add_to_waiting_parents, add_to_waiting_s_e, add_wkid, all_children, alter_targets, build, builder_set, built, changed, changed_since_last_build, children, children_are_up_to_date, clear, clear_memoized_values, del_binfo, disambiguate, do_not_store_info, env_set, executor_cleanup, explain, get_binfo, get_build_env, get_build_scanner_path, get_builder, get_cachedir_csig, get_csig, get_env, get_env_scanner, get_executor, get_found_includes, get_implicit_deps, get_ninfo, get_source_scanner, get_state, get_stored_implicit, get_stored_info, get_string, get_target_scanner, has_builder, has_explicit_builder, is_derived, is_literal, is_up_to_date, make_ready, missing, multiple_side_effect_has_builder, new_binfo, new_ninfo, postprocess, prepare, push_to_cache, release_target_info, remove, render_include_tree, reset_executor, retrieve_from_cache, scan, scanner_key, select_scanner, set_always_build, set_executor, set_explicit, set_nocache, set_noclean, set_precious, set_pseudo, set_specific_source, set_state, state_has_changed, store_info, visited

Inherited from Node (private): _add_child, _children_get, _children_reset

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __subclasshook__

Class Variables

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memoizer_counters = []

Inherited from Node: __metaclass__

Instance Variables

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name
Filename with extension as it was specified when the object was created; to obtain filesystem path, use Python str() function

suffix
Cached filename extension

fs
Reference to parent Node.FS object

Properties

[hide private]

Inherited from object: __class__

Method Details

[hide private]

init(self, name, directory, fs)
(Constructor)

source code

Initialize a generic Node.FS.Base object.

Call the superclass initialization, take care of setting up our relative and absolute paths, identify our parent directory, and indicate that this node should use signatures.

Overrides: object.__init__

get_suffix(self)

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Overrides: Node.get_suffix

str(self)
(Informal representation operator)

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A Node.FS.Base object's string representation is its path name.

Overrides: object.__str__

exists(self)

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Does this node exists?

Overrides: Node.exists: (inherited documentation)

rexists(self)

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Does this node exist locally or in a repositiory?

Overrides: Node.rexists: (inherited documentation)

src_builder(self)

source code

Fetch the source code builder for this node.

If there isn't one, we cache the source code builder specified for the directory (which in turn will cache the value from its parent directory, and so on up to the file system root).

get_abspath(self)

source code

Get the absolute path of the file.

Overrides: Node.get_abspath

for_signature(self)

source code

Return a string representation of the Node that will always be the same for this particular Node, no matter what. This is by contrast to the __str__() method, which might, for instance, return a relative path for a file Node. The purpose of this method is to generate a value to be used in signature calculation for the command line used to build a target, and we use this method instead of str() to avoid unnecessary rebuilds. This method does not need to return something that would actually work in a command line; it can return any kind of nonsense, so long as it does not change.

Overrides: Node.for_signature: (inherited documentation)

get_subst_proxy(self)

source code

This method is expected to return an object that will function exactly like this Node, except that it implements any additional special features that we would like to be in effect for Environment variable substitution. The principle use is that some Nodes would like to implement a __getattr__() method, but putting that in the Node type itself has a tendency to kill performance. We instead put it in a proxy and return it from this method. It is legal for this method to return self if no new functionality is needed for Environment substitution.

Overrides: Node.get_subst_proxy: (inherited documentation)

target_from_source(self, prefix, suffix, splitext=<function splitext at 0x9af69cc>)

source code

Generates a target entry that corresponds to this entry (usually a source file) with the specified prefix and suffix.

Note that this method can be overridden dynamically for generated files that need different behavior. See Tool/swig.py for an example.

Rfindalldirs(self, pathlist)

source code

Return all of the directories for a given path list, including corresponding "backing" directories in any repositories.

The Node lookups are relative to this Node (typically a directory), so memoizing result saves cycles from looking up the same path for each target in a given directory.

Class Base

__init__(self, name, directory, fs) (Constructor)

get_suffix(self)

__str__(self) (Informal representation operator)

exists(self)

rexists(self)

src_builder(self)

get_abspath(self)

for_signature(self)

get_subst_proxy(self)

target_from_source(self, prefix, suffix, splitext=<function splitext at 0x9af69cc>)

Rfindalldirs(self, pathlist)

init(self, name, directory, fs)
(Constructor)

str(self)
(Informal representation operator)