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Viewing changes to bzrlib/merge.py

  • Committer: Martin Pool
  • Date: 2005-07-22 23:32:00 UTC
  • Revision ID: mbp@sourcefrog.net-20050722233200-ccdeca985093a9fb
- now needs python 2.4
- update instructions for running selftest

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bzrlib/merge.py
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from merge_core import merge_flex, ApplyMerge3, BackupBeforeChange
 
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from merge_core import merge_flex
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from changeset import generate_changeset, ExceptionConflictHandler
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from changeset import Inventory, Diff3Merge
 
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from changeset import Inventory
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from bzrlib import find_branch
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import bzrlib.osutils
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from bzrlib.errors import BzrCommandError
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from bzrlib.delta import compare_trees
 
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from bzrlib.diff import compare_trees
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from trace import mutter, warning
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import os.path
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import tempfile
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def merge(other_revision, base_revision,
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          check_clean=True, ignore_zero=False,
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          this_dir=None, backup_files=False, merge_type=ApplyMerge3,
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          file_list=None):
 
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          this_dir=None):
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    """Merge changes into a tree.
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    base_revision
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                raise UnrelatedBranches()
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            base_revision = ['.', base_revno]
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        base_branch, base_tree = get_tree(base_revision, tempdir, "base")
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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_branch.relpath(fname)
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                found_id = False
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                for tree in (this_tree, base_tree.tree, other_tree.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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                    ignore_zero=ignore_zero)
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    finally:
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        shutil.rmtree(tempdir)
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def set_interesting(inventory_a, inventory_b, interesting_ids):
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    """Mark files whose ids are in interesting_ids as interesting
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    """
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    for inventory in (inventory_a, inventory_b):
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        for path, source_file in inventory.iteritems():
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             source_file.interesting = source_file.id in interesting_ids
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def set_optimized(tree_a, tree_b, inventory_a, inventory_b):
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    """Mark files that have changed texts as interesting
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    """
 
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def generate_cset_optimized(tree_a, tree_b, inventory_a, inventory_b):
 
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    """Generate a changeset, using the text_id to mark really-changed files.
 
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    This permits blazing comparisons when text_ids are present.  It also
 
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    disables metadata comparison for files with identical texts.
 
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    """ 
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    for file_id in tree_a.tree.inventory:
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        if file_id not in tree_b.tree.inventory:
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            continue
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            continue
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        inventory_a[abspath(tree_a.tree, file_id)].interesting = False
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        inventory_b[abspath(tree_b.tree, file_id)].interesting = False
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def generate_cset_optimized(tree_a, tree_b, inventory_a, inventory_b,
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                            interesting_ids=None):
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    """Generate a changeset, with preprocessing to select interesting files.
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    using the text_id to mark really-changed files.
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    This permits blazing comparisons when text_ids are present.  It also
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    disables metadata comparison for files with identical texts.
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    """ 
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    if interesting_ids is None:
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        set_optimized(tree_a, tree_b, inventory_a, inventory_b)
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    else:
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        set_interesting(inventory_a, inventory_b, interesting_ids)
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    cset =  generate_changeset(tree_a, tree_b, inventory_a, inventory_b)
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    for entry in cset.entries.itervalues():
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        entry.metadata_change = None
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def merge_inner(this_branch, other_tree, base_tree, 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(base_file, other_file):
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        contents_change = merge_type(base_file, other_file)
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        if backup_files:
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            contents_change = BackupBeforeChange(contents_change)
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        return contents_change
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    def generate_cset(tree_a, tree_b, inventory_a, inventory_b):
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        return generate_cset_optimized(tree_a, tree_b, inventory_a, inventory_b,
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                                       interesting_ids)
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                ignore_zero=False):
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    this_tree = get_tree((this_branch.base, None), tempdir, "this")[1]
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    def get_inventory(tree):
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        return tree.inventory
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    inv_changes = merge_flex(this_tree, base_tree, other_tree,
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                             generate_cset, get_inventory,
 
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                             generate_cset_optimized, get_inventory,
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                             MergeConflictHandler(base_tree.root,
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                                                  ignore_zero=ignore_zero),
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                             merge_factory=merge_factory)
 
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                                                  ignore_zero=ignore_zero))
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    adjust_ids = []
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    for id, path in inv_changes.iteritems():
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    assert len(new_inventory_list) == len(old_entries) + insertions - deletions
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    new_inventory_list.sort()
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    return new_inventory_list
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merge_types = {     "merge3": (ApplyMerge3, "Native diff3-style merge"), 
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                     "diff3": (Diff3Merge,  "Merge using external diff3")
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              }
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