~abentley/bzrtools/bzrtools.dev

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from bzrlib import Branch
from bzrlib.commands import Command
import os
import progress
import patches
import difflib
import sys

def iter_anno_data(branch, file_id):
    later_revision = branch.revno()
    q = range(branch.revno())
    q.reverse()
    later_text_id = branch.basis_tree().inventory[file_id].text_id
    i = 0
    for revno in q:
        i += 1
        cur_tree = branch.revision_tree(branch.lookup_revision(revno))
        if file_id not in cur_tree.inventory:
            text_id = None
        else:
            text_id = cur_tree.inventory[file_id].text_id
        if text_id != later_text_id:
            patch = get_patch(branch, revno, later_revision, file_id)
            yield revno, patch.iter_inserted(), patch
            later_revision = revno
            later_text_id = text_id
        yield progress.Progress("revisions", i)

def get_patch(branch, old_revno, new_revno, file_id):
    old_tree = branch.revision_tree(branch.lookup_revision(old_revno))
    new_tree = branch.revision_tree(branch.lookup_revision(new_revno))
    if file_id in old_tree.inventory:
        old_file = old_tree.get_file(file_id).readlines()
    else:
        old_file = []
    ud = difflib.unified_diff(old_file, new_tree.get_file(file_id).readlines())
    return patches.parse_patch(ud)

class cmd_annotate(Command):
    """Show which revision added each line in a file"""

    takes_args = ['filename']
    def run(self, filename):
        if not os.path.exists(filename):
            raise BzrCommandError("The file %s does not exist." % filename)
        branch = (Branch(filename))
        file_id = branch.working_tree().path2id(filename)
        if file_id is None:
            raise BzrCommandError("The file %s is not versioned." % filename)
        lines = branch.basis_tree().get_file(file_id)
        total = branch.revno()
        anno_d_iter = iter_anno_data(branch, file_id)
        progress_bar = progress.ProgressBar()
        try:
            for result in patches.iter_annotate_file(lines, anno_d_iter):
                if isinstance(result, progress.Progress):
                    result.total = total
                    progress_bar(result)
                else:
                    anno_lines = result
        finally:
            progress.clear_progress_bar()
        for line in anno_lines:
            sys.stdout.write("%4s:%s" % (str(line.log), line.text))