GitPython/git/objects/submodule/base.py at experiment-2012 · githubdelegate/GitPython · GitHub

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# This module is part of GitDB and is released under

# the New BSD License: http://www.opensource.org/licenses/bsd-license.php

from git.util import RepoAliasMixin

import util

from util import (

mkhead,

sm_name,

sm_section,

unbare_repo,

SubmoduleConfigParser,

find_first_remote_branch

)

from git.objects.util import Traversable

from StringIO import StringIO # need a dict to set bloody .name field

from git.util import (

Iterable,

join_path_native,

to_native_path_linux,

rmtree

)

from git.db.interface import RemoteProgress

from git.config import SectionConstraint

from git.exc import (

InvalidGitRepositoryError,

NoSuchPathError

)

import stat

import git # we use some types indirectly to prevent cyclic imports !

import os

import sys

import time

__all__ = ["Submodule", "UpdateProgress"]

class UpdateProgress(RemoteProgress):

"""Class providing detailed progress information to the caller who should

derive from it and implement the ``update(...)`` message"""

CLONE, FETCH, UPDWKTREE = [1 << x for x in range(RemoteProgress._num_op_codes, RemoteProgress._num_op_codes + 3)]

_num_op_codes = RemoteProgress._num_op_codes + 3

__slots__ = tuple()

BEGIN = UpdateProgress.BEGIN

END = UpdateProgress.END

CLONE = UpdateProgress.CLONE

FETCH = UpdateProgress.FETCH

UPDWKTREE = UpdateProgress.UPDWKTREE

# IndexObject comes via util module, its a 'hacky' fix thanks to pythons import

# mechanism which cause plenty of trouble of the only reason for packages and

# modules is refactoring - subpackages shoudn't depend on parent packages

class Submodule(util.IndexObject, Iterable, Traversable, RepoAliasMixin):

"""Implements access to a git submodule. They are special in that their sha

represents a commit in the submodule's repository which is to be checked out

at the path of this instance.

The submodule type does not have a string type associated with it, as it exists

solely as a marker in the tree and index.

All methods work in bare and non-bare repositories."""

_id_attribute_ = "name"

k_modules_file = '.gitmodules'

k_head_option = 'branch'

k_head_default = 'master'

k_default_mode = stat.S_IFDIR | stat.S_IFLNK # submodules are directories with link-status

# this is a bogus type for base class compatability

type = 'submodule'

# this type doesn't really have a type id

type_id = 0

__slots__ = ('_parent_commit', '_url', '_branch_path', '_name', '__weakref__')

_cache_attrs = ('path', '_url', '_branch_path')

def __init__(self, repo, binsha, mode=None, path=None, name=None, parent_commit=None, url=None, branch_path=None):

"""Initialize this instance with its attributes. We only document the ones

that differ from ``IndexObject``

:param repo: Our parent repository

:param binsha: binary sha referring to a commit in the remote repository, see url parameter

:param parent_commit: a Commit object instance, see set_parent_commit() for more information

:param url: The url to the remote repository which is the submodule

:param branch_path: full (relative) path to ref to checkout when cloning the remote repository"""

super(Submodule, self).__init__(repo, binsha, mode, path)

self.size = 0

if parent_commit is not None:

self._parent_commit = parent_commit

if url is not None:

self._url = url

if branch_path is not None:

assert isinstance(branch_path, basestring)

self._branch_path = branch_path

if name is not None:

self._name = name

def _set_cache_(self, attr):

if attr == '_parent_commit':

# set a default value, which is the root tree of the current head

self._parent_commit = self.repo.commit()

elif attr in ('path', '_url', '_branch_path'):

reader = self.config_reader()

# default submodule values

self.path = reader.get_value('path')

self._url = reader.get_value('url')

# git-python extension values - optional

self._branch_path = reader.get_value(self.k_head_option, git.Head.to_full_path(self.k_head_default))

elif attr == '_name':

raise AttributeError("Cannot retrieve the name of a submodule if it was not set initially")

else:

super(Submodule, self)._set_cache_(attr)

# END handle attribute name

def _get_intermediate_items(self, item):

""":return: all the submodules of our module repository"""

try:

return type(self).list_items(item.module())

except InvalidGitRepositoryError:

return list()

# END handle intermeditate items

def __eq__(self, other):

"""Compare with another submodule"""

# we may only compare by name as this should be the ID they are hashed with

# Otherwise this type wouldn't be hashable

# return self.path == other.path and self.url == other.url and super(Submodule, self).__eq__(other)

return self._name == other._name

def __ne__(self, other):

"""Compare with another submodule for inequality"""

return not (self == other)

def __hash__(self):

"""Hash this instance using its logical id, not the sha"""

return hash(self._name)

def __str__(self):

return self._name

def __repr__(self):

return "git.%s(name=%s, path=%s, url=%s, branch_path=%s)" % (type(self).__name__, self._name, self.path, self.url, self.branch_path)

@classmethod

def _config_parser(cls, repo, parent_commit, read_only):

""":return: Config Parser constrained to our submodule in read or write mode

:raise IOError: If the .gitmodules file cannot be found, either locally or in the repository

at the given parent commit. Otherwise the exception would be delayed until the first

access of the config parser"""

parent_matches_head = repo.head.commit == parent_commit

if not repo.bare and parent_matches_head:

fp_module = cls.k_modules_file

fp_module_path = os.path.join(repo.working_tree_dir, fp_module)

if not os.path.isfile(fp_module_path):

raise IOError("%s file was not accessible" % fp_module_path)

# END handle existance

fp_module = fp_module_path

else:

try:

fp_module = cls._sio_modules(parent_commit)

except KeyError:

raise IOError("Could not find %s file in the tree of parent commit %s" %

(cls.k_modules_file, parent_commit))

# END handle exceptions

# END handle non-bare working tree

if not read_only and (repo.bare or not parent_matches_head):

raise ValueError("Cannot write blobs of 'historical' submodule configurations")

# END handle writes of historical submodules

return SubmoduleConfigParser(fp_module, read_only=read_only)

def _clear_cache(self):

# clear the possibly changed values

for name in self._cache_attrs:

try:

delattr(self, name)

except AttributeError:

pass

# END try attr deletion

# END for each name to delete

@classmethod

def _sio_modules(cls, parent_commit):

""":return: Configuration file as StringIO - we only access it through the respective blob's data"""

sio = StringIO(parent_commit.tree[cls.k_modules_file].data_stream.read())

sio.name = cls.k_modules_file

return sio

def _config_parser_constrained(self, read_only):

""":return: Config Parser constrained to our submodule in read or write mode"""

parser = self._config_parser(self.repo, self._parent_commit, read_only)

parser.set_submodule(self)

return SectionConstraint(parser, sm_section(self.name))

#{ Edit Interface

@classmethod

def add(cls, repo, name, path, url=None, branch=None, no_checkout=False, repoType=None):

"""Add a new submodule to the given repository. This will alter the index

as well as the .gitmodules file, but will not create a new commit.

If the submodule already exists, no matter if the configuration differs

from the one provided, the existing submodule will be returned.

:param repo: Repository instance which should receive the submodule

:param name: The name/identifier for the submodule

:param path: repository-relative or absolute path at which the submodule

should be located

It will be created as required during the repository initialization.

:param url: git-clone compatible URL, see git-clone reference for more information

If None, the repository is assumed to exist, and the url of the first

remote is taken instead. This is useful if you want to make an existing

repository a submodule of anotherone.

:param branch: name of branch at which the submodule should (later) be checked out.

The given branch must exist in the remote repository, and will be checked

out locally as a tracking branch.

It will only be written into the configuration if it not None, which is

when the checked out branch will be the one the remote HEAD pointed to.

The result you get in these situation is somewhat fuzzy, and it is recommended

to specify at least 'master' here.

Examples are 'master' or 'feature/new'

:param no_checkout: if True, and if the repository has to be cloned manually,

no checkout will be performed

:param repoType: The repository type to use. It must provide the clone_from method.

If None, the default implementation is used.

:return: The newly created submodule instance

:note: works atomically, such that no change will be done if the repository

update fails for instance"""

if repo.bare:

raise InvalidGitRepositoryError("Cannot add submodules to bare repositories")

# END handle bare repos

repoType = repoType or git.Repo

path = to_native_path_linux(path)

if path.endswith('/'):

path = path[:-1]

# END handle trailing slash

# assure we never put backslashes into the url, as some operating systems

# like it ...

if url != None:

url = to_native_path_linux(url)

# END assure url correctness

# INSTANTIATE INTERMEDIATE SM

sm = cls(repo, cls.NULL_BIN_SHA, cls.k_default_mode, path, name)

if sm.exists():

# reretrieve submodule from tree

try:

return repo.head.commit.tree[path]

except KeyError:

# could only be in index

index = repo.index

entry = index.entries[index.entry_key(path, 0)]

sm.binsha = entry.binsha

return sm

# END handle exceptions

# END handle existing

# fake-repo - we only need the functionality on the branch instance

br = git.Head(repo, git.Head.to_full_path(str(branch) or cls.k_head_default))

has_module = sm.module_exists()

branch_is_default = branch is None

if has_module and url is not None:

if url not in [r.url for r in sm.module().remotes]:

raise ValueError(

"Specified URL '%s' does not match any remote url of the repository at '%s'" % (url, sm.abspath))

# END check url

# END verify urls match

mrepo = None

if url is None:

if not has_module:

raise ValueError("A URL was not given and existing repository did not exsit at %s" % path)

# END check url

mrepo = sm.module()

urls = [r.url for r in mrepo.remotes]

if not urls:

raise ValueError("Didn't find any remote url in repository at %s" % sm.abspath)

# END verify we have url

url = urls[0]

else:

# clone new repo

kwargs = {'n': no_checkout}

if not branch_is_default:

kwargs['b'] = br.name

# END setup checkout-branch

mrepo = repoType.clone_from(url, path, **kwargs)

# END verify url

# update configuration and index

index = sm.repo.index

writer = sm.config_writer(index=index, write=False)

writer.set_value('url', url)

writer.set_value('path', path)

sm._url = url

if not branch_is_default:

# store full path

writer.set_value(cls.k_head_option, br.path)

sm._branch_path = br.path

# END handle path

del(writer)

# we deliberatly assume that our head matches our index !

pcommit = repo.head.commit

sm._parent_commit = pcommit

sm.binsha = mrepo.head.commit.binsha

index.add([sm], write=True)

return sm

def update(self, recursive=False, init=True, to_latest_revision=False, progress=None,

dry_run=False, ):

"""Update the repository of this submodule to point to the checkout

we point at with the binsha of this instance.

:param recursive: if True, we will operate recursively and update child-

modules as well.

:param init: if True, the module repository will be cloned into place if necessary

:param to_latest_revision: if True, the submodule's sha will be ignored during checkout.

Instead, the remote will be fetched, and the local tracking branch updated.

This only works if we have a local tracking branch, which is the case

if the remote repository had a master branch, or of the 'branch' option

was specified for this submodule and the branch existed remotely

:param progress: UpdateProgress instance or None of no progress should be shown

:param dry_run: if True, the operation will only be simulated, but not performed.

All performed operations are read-only

:note: does nothing in bare repositories

:note: method is definitely not atomic if recurisve is True

:return: self"""

if self.repo.bare:

return self

# END pass in bare mode

if progress is None:

progress = UpdateProgress()

# END handle progress

prefix = ''

if dry_run:

prefix = "DRY-RUN: "

# END handle prefix

# to keep things plausible in dry-run mode

if dry_run:

mrepo = None

# END init mrepo

# ASSURE REPO IS PRESENT AND UPTODATE

#####################################

try:

mrepo = self.module()

rmts = mrepo.remotes

len_rmts = len(rmts)

for i, remote in enumerate(rmts):

op = FETCH

if i == 0:

op |= BEGIN

# END handle start

progress.update(op, i, len_rmts, prefix + "Fetching remote %s of submodule %r" % (remote, self.name))

#===============================

if not dry_run:

remote.fetch(progress=progress)

# END handle dry-run

#===============================

if i == len_rmts - 1:

op |= END

# END handle end

progress.update(op, i, len_rmts, prefix + "Done fetching remote of submodule %r" % self.name)

# END fetch new data

except InvalidGitRepositoryError:

if not init:

return self

# END early abort if init is not allowed

# there is no git-repository yet - but delete empty paths

module_path = join_path_native(self.repo.working_tree_dir, self.path)

if not dry_run and os.path.isdir(module_path):

try:

os.rmdir(module_path)

except OSError:

raise OSError("Module directory at %r does already exist and is non-empty" % module_path)

# END handle OSError

# END handle directory removal

# don't check it out at first - nonetheless it will create a local

# branch according to the remote-HEAD if possible

progress.update(BEGIN | CLONE, 0, 1, prefix + "Cloning %s to %s in submodule %r" %

(self.url, module_path, self.name))

if not dry_run:

mrepo = type(self.repo).clone_from(self.url, module_path, n=True)

# END handle dry-run

progress.update(END | CLONE, 0, 1, prefix + "Done cloning to %s" % module_path)

if not dry_run:

# see whether we have a valid branch to checkout

try:

# find a remote which has our branch - we try to be flexible

remote_branch = find_first_remote_branch(mrepo.remotes, self.branch_name)

local_branch = mkhead(mrepo, self.branch_path)

# have a valid branch, but no checkout - make sure we can figure

# that out by marking the commit with a null_sha

local_branch.set_object(util.Object(mrepo, self.NULL_BIN_SHA))

# END initial checkout + branch creation

# make sure HEAD is not detached

mrepo.head.set_reference(local_branch, logmsg="submodule: attaching head to %s" % local_branch)

mrepo.head.ref.set_tracking_branch(remote_branch)

except IndexError:

print >> sys.stderr, "Warning: Failed to checkout tracking branch %s" % self.branch_path

# END handle tracking branch

# NOTE: Have to write the repo config file as well, otherwise

# the default implementation will be offended and not update the repository

# Maybe this is a good way to assure it doesn't get into our way, but

# we want to stay backwards compatible too ... . Its so redundant !

self.repo.config_writer().set_value(sm_section(self.name), 'url', self.url)

# END handle dry_run

# END handle initalization

# DETERMINE SHAS TO CHECKOUT

############################

binsha = self.binsha

hexsha = self.hexsha

if mrepo is not None:

# mrepo is only set if we are not in dry-run mode or if the module existed

is_detached = mrepo.head.is_detached

# END handle dry_run

if mrepo is not None and to_latest_revision:

msg_base = "Cannot update to latest revision in repository at %r as " % mrepo.working_dir

if not is_detached:

rref = mrepo.head.ref.tracking_branch()

if rref is not None:

rcommit = rref.commit

binsha = rcommit.binsha

hexsha = rcommit.hexsha

else:

print >> sys.stderr, "%s a tracking branch was not set for local branch '%s'" % (

msg_base, mrepo.head.ref)

# END handle remote ref

else:

print >> sys.stderr, "%s there was no local tracking branch" % msg_base

# END handle detached head

# END handle to_latest_revision option

# update the working tree

# handles dry_run

if mrepo is not None and mrepo.head.commit.binsha != binsha:

progress.update(BEGIN | UPDWKTREE, 0, 1, prefix +

"Updating working tree at %s for submodule %r to revision %s" % (self.path, self.name, hexsha))

if not dry_run:

if is_detached:

# NOTE: for now we force, the user is no supposed to change detached

# submodules anyway. Maybe at some point this becomes an option, to

# properly handle user modifications - see below for future options

# regarding rebase and merge.

mrepo.git.checkout(hexsha, force=True)

else:

# TODO: allow to specify a rebase, merge, or reset

# TODO: Warn if the hexsha forces the tracking branch off the remote

# branch - this should be prevented when setting the branch option

mrepo.head.reset(hexsha, index=True, working_tree=True)

# END handle checkout

# END handle dry_run

progress.update(END | UPDWKTREE, 0, 1, prefix + "Done updating working tree for submodule %r" % self.name)

# END update to new commit only if needed

# HANDLE RECURSION

##################

if recursive:

# in dry_run mode, the module might not exist

if mrepo is not None:

for submodule in self.iter_items(self.module()):

submodule.update(recursive, init, to_latest_revision, progress=progress, dry_run=dry_run)

# END handle recursive update

# END handle dry run

# END for each submodule

return self

@unbare_repo

def move(self, module_path, configuration=True, module=True):

"""Move the submodule to a another module path. This involves physically moving

the repository at our current path, changing the configuration, as well as

adjusting our index entry accordingly.

:param module_path: the path to which to move our module, given as

repository-relative path. Intermediate directories will be created

accordingly. If the path already exists, it must be empty.

Trailling (back)slashes are removed automatically

:param configuration: if True, the configuration will be adjusted to let

the submodule point to the given path.

:param module: if True, the repository managed by this submodule

will be moved, not the configuration. This will effectively

leave your repository in an inconsistent state unless the configuration

and index already point to the target location.

:return: self

:raise ValueError: if the module path existed and was not empty, or was a file

:note: Currently the method is not atomic, and it could leave the repository

in an inconsistent state if a sub-step fails for some reason

"""

if module + configuration < 1:

raise ValueError("You must specify to move at least the module or the configuration of the submodule")

# END handle input

module_path = to_native_path_linux(module_path)

if module_path.endswith('/'):

module_path = module_path[:-1]

# END handle trailing slash

# VERIFY DESTINATION

if module_path == self.path:

return self

# END handle no change

dest_path = join_path_native(self.repo.working_tree_dir, module_path)

if os.path.isfile(dest_path):

raise ValueError("Cannot move repository onto a file: %s" % dest_path)

# END handle target files

index = self.repo.index

tekey = index.entry_key(module_path, 0)

# if the target item already exists, fail

if configuration and tekey in index.entries:

raise ValueError("Index entry for target path did alredy exist")

# END handle index key already there

# remove existing destination

if module:

if os.path.exists(dest_path):

if len(os.listdir(dest_path)):

raise ValueError("Destination module directory was not empty")

# END handle non-emptyness

if os.path.islink(dest_path):

os.remove(dest_path)

else:

os.rmdir(dest_path)

# END handle link

else:

# recreate parent directories

# NOTE: renames() does that now

pass

# END handle existance

# END handle module

# move the module into place if possible

cur_path = self.abspath

renamed_module = False

if module and os.path.exists(cur_path):

os.renames(cur_path, dest_path)

renamed_module = True

# END move physical module

# rename the index entry - have to manipulate the index directly as

# git-mv cannot be used on submodules ... yeah

try:

if configuration:

try:

ekey = index.entry_key(self.path, 0)

entry = index.entries[ekey]

del(index.entries[ekey])

nentry = git.IndexEntry(entry[:3] + (module_path,) + entry[4:])

index.entries[tekey] = nentry

except KeyError:

raise InvalidGitRepositoryError("Submodule's entry at %r did not exist" % (self.path))

# END handle submodule doesn't exist

# update configuration

writer = self.config_writer(index=index) # auto-write

writer.set_value('path', module_path)

self.path = module_path

del(writer)

# END handle configuration flag

except Exception:

if renamed_module:

os.renames(dest_path, cur_path)

# END undo module renaming

raise

# END handle undo rename

return self

@unbare_repo

def remove(self, module=True, force=False, configuration=True, dry_run=False):

"""Remove this submodule from the repository. This will remove our entry

from the .gitmodules file and the entry in the .git/config file.

:param module: If True, the module we point to will be deleted

as well. If the module is currently on a commit which is not part

of any branch in the remote, if the currently checked out branch

working tree, or untracked files,

is ahead of its tracking branch, if you have modifications in the

In case the removal of the repository fails for these reasons, the

submodule status will not have been altered.

If this submodule has child-modules on its own, these will be deleted

prior to touching the own module.

:param force: Enforces the deletion of the module even though it contains

modifications. This basically enforces a brute-force file system based

deletion.

:param configuration: if True, the submodule is deleted from the configuration,

otherwise it isn't. Although this should be enabled most of the times,

this flag enables you to safely delete the repository of your submodule.

:param dry_run: if True, we will not actually do anything, but throw the errors

we would usually throw

:return: self

:note: doesn't work in bare repositories

:raise InvalidGitRepositoryError: thrown if the repository cannot be deleted

:raise OSError: if directories or files could not be removed"""

if not (module + configuration):

raise ValueError("Need to specify to delete at least the module, or the configuration")

# END handle params

# DELETE MODULE REPOSITORY

##########################

if module and self.module_exists():

if force:

# take the fast lane and just delete everything in our module path

# TODO: If we run into permission problems, we have a highly inconsistent

# state. Delete the .git folders last, start with the submodules first

mp = self.abspath

method = None

if os.path.islink(mp):

method = os.remove

elif os.path.isdir(mp):

method = rmtree

elif os.path.exists(mp):

raise AssertionError("Cannot forcibly delete repository as it was neither a link, nor a directory")

# END handle brutal deletion

if not dry_run:

assert method

method(mp)

# END apply deletion method

else:

# verify we may delete our module

mod = self.module()

if mod.is_dirty(untracked_files=True):

raise InvalidGitRepositoryError(

"Cannot delete module at %s with any modifications, unless force is specified" % mod.working_tree_dir)

# END check for dirt

# figure out whether we have new commits compared to the remotes

# NOTE: If the user pulled all the time, the remote heads might

# not have been updated, so commits coming from the remote look

# as if they come from us. But we stay strictly read-only and

# don't fetch beforhand.

for remote in mod.remotes:

num_branches_with_new_commits = 0

rrefs = remote.refs

for rref in rrefs:

num_branches_with_new_commits += len(mod.git.cherry(rref)) != 0

# END for each remote ref

# not a single remote branch contained all our commits

if num_branches_with_new_commits == len(rrefs):

raise InvalidGitRepositoryError(

"Cannot delete module at %s as there are new commits" % mod.working_tree_dir)

# END handle new commits

# have to manually delete references as python's scoping is

# not existing, they could keep handles open ( on windows this is a problem )

if len(rrefs):

del(rref)

# END handle remotes

del(rrefs)

del(remote)

# END for each remote

# gently remove all submodule repositories

for sm in self.children():

sm.remove(module=True, force=False, configuration=False, dry_run=dry_run)

del(sm)

# END for each child-submodule

# finally delete our own submodule

if not dry_run:

wtd = mod.working_tree_dir

del(mod) # release file-handles (windows)

rmtree(wtd)

# END delete tree if possible

# END handle force

# END handle module deletion

# DELETE CONFIGURATION

######################

if configuration and not dry_run:

# first the index-entry

index = self.repo.index

try:

del(index.entries[index.entry_key(self.path, 0)])

except KeyError:

pass

# END delete entry

index.write()

# now git config - need the config intact, otherwise we can't query

# inforamtion anymore

self.repo.config_writer().remove_section(sm_section(self.name))

self.config_writer().remove_section()

# END delete configuration

# void our data not to delay invalid access

self._clear_cache()

return self

def set_parent_commit(self, commit, check=True):

"""Set this instance to use the given commit whose tree is supposed to

contain the .gitmodules blob.

:param commit: Commit'ish reference pointing at the root_tree

:param check: if True, relatively expensive checks will be performed to verify

validity of the submodule.

:raise ValueError: if the commit's tree didn't contain the .gitmodules blob.

:raise ValueError: if the parent commit didn't store this submodule under the

current path

:return: self"""

pcommit = self.repo.commit(commit)

pctree = pcommit.tree

if self.k_modules_file not in pctree:

raise ValueError("Tree of commit %s did not contain the %s file" % (commit, self.k_modules_file))

# END handle exceptions

prev_pc = self._parent_commit

self._parent_commit = pcommit

if check:

parser = self._config_parser(self.repo, self._parent_commit, read_only=True)

if not parser.has_section(sm_section(self.name)):

self._parent_commit = prev_pc

raise ValueError("Submodule at path %r did not exist in parent commit %s" % (self.path, commit))

# END handle submodule did not exist

# END handle checking mode

# update our sha, it could have changed

self.binsha = pctree[self.path].binsha

self._clear_cache()

return self

@unbare_repo

def config_writer(self, index=None, write=True):

""":return: a config writer instance allowing you to read and write the data

belonging to this submodule into the .gitmodules file.

:param index: if not None, an IndexFile instance which should be written.

defaults to the index of the Submodule's parent repository.

:param write: if True, the index will be written each time a configuration

value changes.

:note: the parameters allow for a more efficient writing of the index,

as you can pass in a modified index on your own, prevent automatic writing,

and write yourself once the whole operation is complete

:raise ValueError: if trying to get a writer on a parent_commit which does not

match the current head commit

:raise IOError: If the .gitmodules file/blob could not be read"""

writer = self._config_parser_constrained(read_only=False)

if index is not None:

writer.config._index = index

writer.config._auto_write = write

return writer

#} END edit interface

#{ Query Interface

@unbare_repo

def module(self, repoType=None):

""":return: Repository instance initialized from the repository at our submodule path

:param repoType: The type of repository to be created. It must be possible to instatiate it

from a single repository path.

If None, a default repository type will be used

:raise InvalidGitRepositoryError: if a repository was not available. This could

also mean that it was not yet initialized"""

# late import to workaround circular dependencies

module_path = self.abspath

repoType = repoType or git.Repo

try:

repo = repoType(module_path)

if repo != self.repo:

return repo

# END handle repo uninitialized

except (InvalidGitRepositoryError, NoSuchPathError):

raise InvalidGitRepositoryError("No valid repository at %s" % self.path)

else:

raise InvalidGitRepositoryError("Repository at %r was not yet checked out" % module_path)

# END handle exceptions

def module_exists(self):

""":return: True if our module exists and is a valid git repository. See module() method"""

try:

self.module()

return True

except Exception:

return False

# END handle exception

def exists(self):

"""

:return: True if the submodule exists, False otherwise. Please note that

a submodule may exist (in the .gitmodules file) even though its module

doesn't exist"""

# keep attributes for later, and restore them if we have no valid data

# this way we do not actually alter the state of the object

loc = locals()

for attr in self._cache_attrs:

if hasattr(self, attr):

loc[attr] = getattr(self, attr)

# END if we have the attribute cache

# END for each attr

self._clear_cache()

try:

self.path

return True

except Exception:

return False

# END handle exceptions

finally:

for attr in self._cache_attrs:

if attr in loc:

setattr(self, attr, loc[attr])

# END if we have a cache

# END reapply each attribute

# END handle object state consistency

@property

def branch(self):

""":return: The branch instance that we are to checkout

:raise InvalidGitRepositoryError: if our module is not yet checked out"""

return mkhead(self.module(), self._branch_path)

@property

def branch_path(self):

"""

:return: full (relative) path as string to the branch we would checkout

from the remote and track"""

return self._branch_path

@property

def branch_name(self):

""":return: the name of the branch, which is the shortest possible branch name"""

# use an instance method, for this we create a temporary Head instance

# which uses a repository that is available at least ( it makes no difference )

return git.Head(self.repo, self._branch_path).name

@property

def url(self):

""":return: The url to the repository which our module-repository refers to"""

return self._url

@property

def parent_commit(self):

""":return: Commit instance with the tree containing the .gitmodules file

:note: will always point to the current head's commit if it was not set explicitly"""

return self._parent_commit

@property

def name(self):

""":return: The name of this submodule. It is used to identify it within the

.gitmodules file.

:note: by default, the name is the path at which to find the submodule, but

in git-python it should be a unique identifier similar to the identifiers

used for remotes, which allows to change the path of the submodule

easily

"""

return self._name

def config_reader(self):

"""

:return: ConfigReader instance which allows you to qurey the configuration values

of this submodule, as provided by the .gitmodules file

:note: The config reader will actually read the data directly from the repository

and thus does not need nor care about your working tree.

:note: Should be cached by the caller and only kept as long as needed

:raise IOError: If the .gitmodules file/blob could not be read"""

return self._config_parser_constrained(read_only=True)

def children(self):

"""

:return: IterableList(Submodule, ...) an iterable list of submodules instances

which are children of this submodule or 0 if the submodule is not checked out"""

return self._get_intermediate_items(self)

#} END query interface

#{ Iterable Interface

@classmethod

def iter_items(cls, repo, parent_commit='HEAD'):

""":return: iterator yielding Submodule instances available in the given repository"""

pc = repo.commit(parent_commit) # parent commit instance

try:

parser = cls._config_parser(repo, pc, read_only=True)

except IOError:

raise StopIteration

# END handle empty iterator

rt = pc.tree # root tree

for sms in parser.sections():

n = sm_name(sms)

p = parser.get_value(sms, 'path')

u = parser.get_value(sms, 'url')

b = cls.k_head_default

if parser.has_option(sms, cls.k_head_option):

b = parser.get_value(sms, cls.k_head_option)

# END handle optional information

# get the binsha

index = repo.index

try:

sm = rt[p]

except KeyError:

# try the index, maybe it was just added

try:

entry = index.entries[index.entry_key(p, 0)]

sm = Submodule(repo, entry.binsha, entry.mode, entry.path)

except KeyError:

raise InvalidGitRepositoryError(

"Gitmodule path %r did not exist in revision of parent commit %s" % (p, parent_commit))

# END handle keyerror

# END handle critical error

# fill in remaining info - saves time as it doesn't have to be parsed again

sm._name = n

sm._parent_commit = pc

sm._branch_path = git.Head.to_full_path(b)

sm._url = u

yield sm

# END for each section

#} END iterable interface

GitPython/git/objects/submodule/base.py at experiment-2012 · githubdelegate/GitPython · GitHub

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