/brz/remove-bazaar

# Copyright (C) 2005 Canonical Ltd

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

def commit(branch, message, timestamp=None, timezone=None,

           committer=None,

           verbose=False):

    """Commit working copy as a new revision.

    The basic approach is to add all the file texts into the

    store, then the inventory, then make a new revision pointing

    to that inventory and store that.

    This is not quite safe if the working copy changes during the

    commit; for the moment that is simply not allowed.  A better

    approach is to make a temporary copy of the files before

    computing their hashes, and then add those hashes in turn to

    the inventory.  This should mean at least that there are no

    broken hash pointers.  There is no way we can get a snapshot

    of the whole directory at an instant.  This would also have to

    be robust against files disappearing, moving, etc.  So the

    whole thing is a bit hard.

    timestamp -- if not None, seconds-since-epoch for a

         postdated/predated commit.

    """

    import os, time, tempfile

    from inventory import Inventory

    from osutils import isdir, isfile, sha_string, quotefn, \

         local_time_offset, username

    from branch import gen_file_id

    from errors import BzrError

    from revision import Revision

    from textui import show_status

    from trace import mutter, note

    branch._need_writelock()

    ## TODO: Show branch names

    # TODO: Don't commit if there are no changes, unless forced?

    # First walk over the working inventory; and both update that

    # and also build a new revision inventory.  The revision

    # inventory needs to hold the text-id, sha1 and size of the

    # actual file versions committed in the revision.  (These are

    # not present in the working inventory.)  We also need to

    # detect missing/deleted files, and remove them from the

    # working inventory.

    work_inv = branch.read_working_inventory()

    inv = Inventory()

    basis = branch.basis_tree()

    basis_inv = basis.inventory

    missing_ids = []

    for path, entry in work_inv.iter_entries():

        ## TODO: Cope with files that have gone missing.

        ## TODO: Check that the file kind has not changed from the previous

        ## revision of this file (if any).

        entry = entry.copy()

        p = branch.abspath(path)

        file_id = entry.file_id

        mutter('commit prep file %s, id %r ' % (p, file_id))

        if not os.path.exists(p):

            mutter("    file is missing, removing from inventory")

            if verbose:

                show_status('D', entry.kind, quotefn(path))

            missing_ids.append(file_id)

            continue

        # TODO: Handle files that have been deleted

        # TODO: Maybe a special case for empty files?  Seems a

        # waste to store them many times.

        inv.add(entry)

        if basis_inv.has_id(file_id):

            old_kind = basis_inv[file_id].kind

            if old_kind != entry.kind:

                raise BzrError("entry %r changed kind from %r to %r"

                        % (file_id, old_kind, entry.kind))

        if entry.kind == 'directory':

            if not isdir(p):

                raise BzrError("%s is entered as directory but not a directory" % quotefn(p))

        elif entry.kind == 'file':

            if not isfile(p):

                raise BzrError("%s is entered as file but is not a file" % quotefn(p))

            content = file(p, 'rb').read()

            entry.text_sha1 = sha_string(content)

            entry.text_size = len(content)

            old_ie = basis_inv.has_id(file_id) and basis_inv[file_id]

            if (old_ie

                and (old_ie.text_size == entry.text_size)

                and (old_ie.text_sha1 == entry.text_sha1)):

                ## assert content == basis.get_file(file_id).read()

                entry.text_id = basis_inv[file_id].text_id

                mutter('    unchanged from previous text_id {%s}' %

                       entry.text_id)

            else:

                entry.text_id = gen_file_id(entry.name)

                branch.text_store.add(content, entry.text_id)

                mutter('    stored with text_id {%s}' % entry.text_id)

                if verbose:

                    if not old_ie:

                        state = 'A'

                    elif (old_ie.name == entry.name

                          and old_ie.parent_id == entry.parent_id):

                        state = 'M'

                    else:

                        state = 'R'

                    show_status(state, entry.kind, quotefn(path))

    for file_id in missing_ids:

        # have to do this later so we don't mess up the iterator.

        # since parents may be removed before their children we

        # have to test.

        # FIXME: There's probably a better way to do this; perhaps

        # the workingtree should know how to filter itbranch.

        if work_inv.has_id(file_id):

            del work_inv[file_id]

    inv_id = rev_id = _gen_revision_id(time.time())

    inv_tmp = tempfile.TemporaryFile()

    inv.write_xml(inv_tmp)

    inv_tmp.seek(0)

    branch.inventory_store.add(inv_tmp, inv_id)

    mutter('new inventory_id is {%s}' % inv_id)

    branch._write_inventory(work_inv)

    if timestamp == None:

        timestamp = time.time()

    if committer == None:

        committer = username()

    if timezone == None:

        timezone = local_time_offset()

    mutter("building commit log message")

    rev = Revision(timestamp=timestamp,

                   timezone=timezone,

                   committer=committer,

                   precursor = branch.last_patch(),

                   message = message,

                   inventory_id=inv_id,

                   revision_id=rev_id)

    rev_tmp = tempfile.TemporaryFile()

    rev.write_xml(rev_tmp)

    rev_tmp.seek(0)

    branch.revision_store.add(rev_tmp, rev_id)

    mutter("new revision_id is {%s}" % rev_id)

    ## XXX: Everything up to here can simply be orphaned if we abort

    ## the commit; it will leave junk files behind but that doesn't

    ## matter.

    ## TODO: Read back the just-generated changeset, and make sure it

    ## applies and recreates the right state.

    ## TODO: Also calculate and store the inventory SHA1

    mutter("committing patch r%d" % (branch.revno() + 1))

    branch.append_revision(rev_id)

    if verbose:

        note("commited r%d" % branch.revno())

def _gen_revision_id(when):

    """Return new revision-id."""

    from binascii import hexlify

    from osutils import rand_bytes, compact_date, user_email

    s = '%s-%s-' % (user_email(), compact_date(when))

    s += hexlify(rand_bytes(8))

    return s