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[merge] robert

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bzrlib/merge.py
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    eventually be done by just building the tree directly calling into 
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    lower-level code (e.g. constructing a changeset).
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    """
 
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    # RBC 20051019 is this not just 'export' ?
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    merge((to_dir, -1), (to_dir, 0), this_dir=to_dir,
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          check_clean=False, ignore_zero=True)
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    All available ancestors of other_revision and base_revision are
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    automatically pulled into the branch.
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    """
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    tempdir = tempfile.mkdtemp(prefix="bzr-")
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    try:
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        if this_dir is None:
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            this_dir = '.'
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        this_branch = Branch.open_containing(this_dir)[0]
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        this_rev_id = this_branch.last_revision()
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        if this_rev_id is None:
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            raise BzrCommandError("This branch has no commits")
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        if check_clean:
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            changes = compare_trees(this_branch.working_tree(), 
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                                    this_branch.basis_tree(), False)
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            if changes.has_changed():
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                raise BzrCommandError("Working tree has uncommitted changes.")
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        other_branch, other_tree = get_tree(other_revision, this_branch)
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        if other_revision[1] == -1:
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            other_rev_id = other_branch.last_revision()
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            if other_rev_id is None:
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                raise NoCommits(other_branch)
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            other_basis = other_rev_id
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        elif other_revision[1] is not None:
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            other_rev_id = other_branch.get_rev_id(other_revision[1])
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            other_basis = other_rev_id
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        else:
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            other_rev_id = None
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            other_basis = other_branch.last_revision()
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            if other_basis is None:
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                raise NoCommits(other_branch)
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        if base_revision == [None, None]:
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            try:
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                base_rev_id = common_ancestor(this_rev_id, other_basis, 
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                                              this_branch)
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            except NoCommonAncestor:
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                raise UnrelatedBranches()
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            base_tree = get_revid_tree(this_branch, base_rev_id, None)
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            base_is_ancestor = True
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        else:
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            base_branch, base_tree = get_tree(base_revision)
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            if base_revision[1] == -1:
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                base_rev_id = base_branch.last_revision()
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            elif base_revision[1] is None:
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                base_rev_id = None
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            else:
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                base_rev_id = base_branch.get_rev_id(base_revision[1])
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            fetch(from_branch=base_branch, to_branch=this_branch)
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            base_is_ancestor = is_ancestor(this_rev_id, base_rev_id,
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                                           this_branch)
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        if file_list is None:
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            interesting_ids = None
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        else:
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            interesting_ids = set()
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            this_tree = this_branch.working_tree()
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            for fname in file_list:
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                path = this_tree.relpath(fname)
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                found_id = False
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                for tree in (this_tree, base_tree, other_tree):
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                    file_id = tree.inventory.path2id(path)
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                    if file_id is not None:
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                        interesting_ids.add(file_id)
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                        found_id = True
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                if not found_id:
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                    raise BzrCommandError("%s is not a source file in any"
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                                          " tree." % fname)
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        merge_inner(this_branch, other_tree, base_tree, tempdir, 
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                    ignore_zero=ignore_zero, backup_files=backup_files, 
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                    merge_type=merge_type, interesting_ids=interesting_ids)
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        if base_is_ancestor and other_rev_id is not None\
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            and other_rev_id not in this_branch.revision_history():
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            this_branch.add_pending_merge(other_rev_id)
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    finally:
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        shutil.rmtree(tempdir)
 
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    if this_dir is None:
 
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        this_dir = '.'
 
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    this_branch = Branch.open_containing(this_dir)[0]
 
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    this_rev_id = this_branch.last_revision()
 
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    if this_rev_id is None:
 
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        raise BzrCommandError("This branch has no commits")
 
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    if check_clean:
 
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        changes = compare_trees(this_branch.working_tree(), 
 
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                                this_branch.basis_tree(), False)
 
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        if changes.has_changed():
 
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            raise BzrCommandError("Working tree has uncommitted changes.")
 
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    other_branch, other_tree = get_tree(other_revision, this_branch)
 
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    if other_revision[1] == -1:
 
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        other_rev_id = other_branch.last_revision()
 
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        if other_rev_id is None:
 
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            raise NoCommits(other_branch)
 
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        other_basis = other_rev_id
 
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    elif other_revision[1] is not None:
 
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        other_rev_id = other_branch.get_rev_id(other_revision[1])
 
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        other_basis = other_rev_id
 
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    else:
 
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        other_rev_id = None
 
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        other_basis = other_branch.last_revision()
 
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        if other_basis is None:
 
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            raise NoCommits(other_branch)
 
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    if base_revision == [None, None]:
 
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        try:
 
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            base_rev_id = common_ancestor(this_rev_id, other_basis, 
 
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                                          this_branch)
 
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        except NoCommonAncestor:
 
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            raise UnrelatedBranches()
 
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        base_tree = get_revid_tree(this_branch, base_rev_id, None)
 
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        base_is_ancestor = True
 
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    else:
 
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        base_branch, base_tree = get_tree(base_revision)
 
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        if base_revision[1] == -1:
 
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            base_rev_id = base_branch.last_revision()
 
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        elif base_revision[1] is None:
 
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            base_rev_id = None
 
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        else:
 
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            base_rev_id = base_branch.get_rev_id(base_revision[1])
 
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        fetch(from_branch=base_branch, to_branch=this_branch)
 
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        base_is_ancestor = is_ancestor(this_rev_id, base_rev_id,
 
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                                       this_branch)
 
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    if file_list is None:
 
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        interesting_ids = None
 
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    else:
 
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        interesting_ids = set()
 
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        this_tree = this_branch.working_tree()
 
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        for fname in file_list:
 
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            path = this_tree.relpath(fname)
 
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            found_id = False
 
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            for tree in (this_tree, base_tree, other_tree):
 
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                file_id = tree.inventory.path2id(path)
 
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                if file_id is not None:
 
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                    interesting_ids.add(file_id)
 
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                    found_id = True
 
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            if not found_id:
 
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                raise BzrCommandError("%s is not a source file in any"
 
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                                      " tree." % fname)
 
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    merge_inner(this_branch, other_tree, base_tree, tempdir=None, 
 
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                ignore_zero=ignore_zero, backup_files=backup_files, 
 
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                merge_type=merge_type, interesting_ids=interesting_ids)
 
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    if base_is_ancestor and other_rev_id is not None\
 
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        and other_rev_id not in this_branch.revision_history():
 
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        this_branch.add_pending_merge(other_rev_id)
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def set_interesting(inventory_a, inventory_b, interesting_ids):
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             source_file.interesting = source_file.id in interesting_ids
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343
 
def merge_inner(this_branch, other_tree, base_tree, tempdir, 
344
 
                ignore_zero=False, merge_type=ApplyMerge3, backup_files=False,
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                interesting_ids=None):
346
 
 
 
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def merge_inner(this_branch, other_tree, base_tree, tempdir=None, 
 
341
                ignore_zero=False, merge_type=ApplyMerge3, backup_files=False,
 
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                interesting_ids=None):
 
343
    """Primary interface for merging. 
 
344
 
 
345
    typical use is probably 
 
346
    'merge_inner(branch, branch.get_revision_tree(other_revision),
 
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                 branch.get_revision_tree(base_revision))'
 
348
    """
 
349
    if tempdir is None:
 
350
        _tempdir = tempfile.mkdtemp(prefix="bzr-")
 
351
    else:
 
352
        _tempdir = tempdir
 
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    try:
 
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        _merge_inner(this_branch, other_tree, base_tree, _tempdir,
 
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                     ignore_zero, merge_type, backup_files, interesting_ids)
 
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    finally:
 
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        if tempdir is None:
 
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            shutil.rmtree(_tempdir)
 
359
 
 
360
 
 
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def _merge_inner(this_branch, other_tree, base_tree, user_tempdir, 
 
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                ignore_zero=False, merge_type=ApplyMerge3, backup_files=False,
 
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                interesting_ids=None):
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    def merge_factory(file_id, base, other):
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        contents_change = merge_type(file_id, base, other)
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        if backup_files: