hgext/graphlog.py
author Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
Fri, 07 Nov 2008 10:29:43 +0100
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parent 7323 1c9f7aa7c8a5
child 7325 f9985108d4e4
permissions -rw-r--r--
graphlog: rename some vars prior to refactoring
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# ASCII graph log extension for Mercurial
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#
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# Copyright 2007 Joel Rosdahl <joel@rosdahl.net>
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#
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# This software may be used and distributed according to the terms of
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# the GNU General Public License, incorporated herein by reference.
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'''show revision graphs in terminal windows'''
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import os
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import sys
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from mercurial.cmdutil import revrange, show_changeset
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from mercurial.commands import templateopts
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from mercurial.i18n import _
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from mercurial.node import nullrev
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from mercurial.util import Abort, canonpath
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from mercurial import util
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def revision_grapher(repo, start_rev, stop_rev):
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    """incremental revision grapher
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    This generator function walks through the revision history from
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    revision start_rev to revision stop_rev (which must be less than
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    or equal to start_rev) and for each revision emits tuples with the
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    following elements:
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      - Current revision.
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      - Current node.
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      - Column of the current node in the set of ongoing edges.
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      - Edges; a list of (col, next_col) indicating the edges between
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        the current node and its parents.
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      - Number of columns (ongoing edges) in the current revision.
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      - The difference between the number of columns (ongoing edges)
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        in the next revision and the number of columns (ongoing edges)
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        in the current revision. That is: -1 means one column removed;
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        0 means no columns added or removed; 1 means one column added.
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    """
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    assert start_rev >= stop_rev
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    curr_rev = start_rev
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    revs = []
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    while curr_rev >= stop_rev:
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        node = repo.changelog.node(curr_rev)
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        # Compute revs and next_revs.
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        if curr_rev not in revs:
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            # New head.
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            revs.append(curr_rev)
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        rev_index = revs.index(curr_rev)
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        next_revs = revs[:]
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        # Add parents to next_revs.
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        parents = get_rev_parents(repo, curr_rev)
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        parents_to_add = []
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        for parent in parents:
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            if parent not in next_revs:
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                parents_to_add.append(parent)
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        next_revs[rev_index:rev_index + 1] = util.sort(parents_to_add)
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        edges = []
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        for parent in parents:
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            edges.append((rev_index, next_revs.index(parent)))
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        n_columns_diff = len(next_revs) - len(revs)
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        yield (curr_rev, node, rev_index, edges, len(revs), n_columns_diff)
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        revs = next_revs
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        curr_rev -= 1
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def filelog_grapher(repo, path, start_rev, stop_rev):
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    """incremental file log grapher
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    This generator function walks through the revision history of a
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    single file from revision start_rev to revision stop_rev (which must
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    be less than or equal to start_rev) and for each revision emits
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    tuples with the following elements:
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      - Current revision.
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      - Current node.
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      - Column of the current node in the set of ongoing edges.
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      - Edges; a list of (col, next_col) indicating the edges between
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        the current node and its parents.
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      - Number of columns (ongoing edges) in the current revision.
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      - The difference between the number of columns (ongoing edges)
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        in the next revision and the number of columns (ongoing edges)
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        in the current revision. That is: -1 means one column removed;
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        0 means no columns added or removed; 1 means one column added.
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    """
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    assert start_rev >= stop_rev
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    revs = []
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    filerev = len(repo.file(path)) - 1
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    while filerev >= 0:
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        fctx = repo.filectx(path, fileid=filerev)
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        # Compute revs and next_revs.
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        if filerev not in revs:
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            revs.append(filerev)
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        rev_index = revs.index(filerev)
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        next_revs = revs[:]
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        # Add parents to next_revs.
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        parents = [f.filerev() for f in fctx.parents() if f.path() == path]
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        parents_to_add = []
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        for parent in parents:
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            if parent not in next_revs:
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                parents_to_add.append(parent)
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        next_revs[rev_index:rev_index + 1] = util.sort(parents_to_add)
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        edges = []
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        for parent in parents:
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            edges.append((rev_index, next_revs.index(parent)))
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        changerev = fctx.linkrev()
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        if changerev <= start_rev:
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            node = repo.changelog.node(changerev)
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            n_columns_diff = len(next_revs) - len(revs)
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            yield (changerev, node, rev_index, edges, len(revs), n_columns_diff)
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        if changerev <= stop_rev:
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            break
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        revs = next_revs
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        filerev -= 1
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def get_rev_parents(repo, rev):
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    return [x for x in repo.changelog.parentrevs(rev) if x != nullrev]
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def fix_long_right_edges(edges):
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    for (i, (start, end)) in enumerate(edges):
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        if end > start:
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            edges[i] = (start, end + 1)
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def draw_edges(edges, nodeline, interline):
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    for (start, end) in edges:
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        if start == end + 1:
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            interline[2 * end + 1] = "/"
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        elif start == end - 1:
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            interline[2 * start + 1] = "\\"
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        elif start == end:
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            interline[2 * start] = "|"
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        else:
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            nodeline[2 * end] = "+"
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            if start > end:
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                (start, end) = (end,start)
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            for i in range(2 * start + 1, 2 * end):
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                if nodeline[i] != "+":
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                    nodeline[i] = "-"
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def format_line(line, level, logstr):
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    text = "%-*s %s" % (2 * level, "".join(line), logstr)
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    return "%s\n" % text.rstrip()
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def get_nodeline_edges_tail(
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        node_index, p_node_index, n_columns, n_columns_diff, p_diff, fix_tail):
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    if fix_tail and n_columns_diff == p_diff and n_columns_diff != 0:
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        # Still going in the same non-vertical direction.
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        if n_columns_diff == -1:
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            start = max(node_index + 1, p_node_index)
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            tail = ["|", " "] * (start - node_index - 1)
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            tail.extend(["/", " "] * (n_columns - start))
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            return tail
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        else:
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            return ["\\", " "] * (n_columns - node_index - 1)
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    else:
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        return ["|", " "] * (n_columns - node_index - 1)
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   164
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def get_padding_line(ni, n_columns, edges):
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    line = []
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    line.extend(["|", " "] * ni)
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    if (ni, ni - 1) in edges or (ni, ni) in edges:
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        # (ni, ni - 1)      (ni, ni)
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        # | | | |           | | | |
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        # +---o |           | o---+
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        # | | c |           | c | |
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        # | |/ /            | |/ /
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        # | | |             | | |
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        c = "|"
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    else:
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        c = " "
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    line.extend([c, " "])
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    line.extend(["|", " "] * (n_columns - ni - 1))
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    return line
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def get_limit(limit_opt):
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    if limit_opt:
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        try:
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            limit = int(limit_opt)
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        except ValueError:
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            raise Abort(_("limit must be a positive integer"))
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        if limit <= 0:
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            raise Abort(_("limit must be positive"))
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    else:
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        limit = sys.maxint
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    return limit
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   193
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def get_revs(repo, rev_opt):
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    if rev_opt:
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        revs = revrange(repo, rev_opt)
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        return (max(revs), min(revs))
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    else:
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        return (len(repo) - 1, 0)
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def graphlog(ui, repo, path=None, **opts):
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    """show revision history alongside an ASCII revision graph
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   203
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    Print a revision history alongside a revision graph drawn with
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    ASCII characters.
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   206
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11cf78983961 Reverted changesets 9d1380e5c8c5 and 1d46169ec197: show @ as glog parent again.
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    Nodes printed as an @ character are parents of the working
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    directory.
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    """
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   210
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    limit = get_limit(opts["limit"])
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    (start_rev, stop_rev) = get_revs(repo, opts["rev"])
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    stop_rev = max(stop_rev, start_rev - limit + 1)
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    if start_rev == nullrev:
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        return
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    cs_printer = show_changeset(ui, repo, opts)
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   217
    if path:
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        path = canonpath(repo.root, os.getcwd(), path)
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    if path:
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        grapher = filelog_grapher(repo, path, start_rev, stop_rev)
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   221
    else:
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        grapher = revision_grapher(repo, start_rev, stop_rev)
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   223
    repo_parents = repo.dirstate.parents()
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    prev_n_columns_diff = 0
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   225
    prev_node_index = 0
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   226
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    for (rev, node, node_index, edges, n_columns, n_columns_diff) in grapher:
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        # node_lines is the list of all text lines to draw alongside the graph
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   229
        ui.pushbuffer()
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        cs_printer.show(rev, node)
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   231
        node_lines = ui.popbuffer().split("\n")[:-1]
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   232
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   233
        if n_columns_diff == -1:
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   234
            # Transform
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   235
            #
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   236
            #     | | |        | | |
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   237
            #     o | |  into  o---+
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   238
            #     |X /         |/ /
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   239
            #     | |          | |
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   240
            fix_long_right_edges(edges)
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parents:
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   241
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   242
        # add_padding_line says whether to rewrite
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   243
        #
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   244
        #     | | | |        | | | |
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parents:
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   245
        #     | o---+  into  | o---+
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diff changeset
   246
        #     |  / /         |   | |  # <--- padding line
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parents:
diff changeset
   247
        #     o | |          |  / /
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   248
        #                    o | |
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diff changeset
   249
        add_padding_line = (len(node_lines) > 2 and
4633
ff7253a0d1da Cleanup of whitespace, indentation and line continuation.
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parents: 4583
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   250
                            n_columns_diff == -1 and
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   251
                            [x for (x, y) in edges if x + 1 < y])
4344
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   252
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   253
        # fix_nodeline_tail says whether to rewrite
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   254
        #
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parents:
diff changeset
   255
        #     | | o | |        | | o | |
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parents:
diff changeset
   256
        #     | | |/ /         | | |/ /
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   257
        #     | o | |    into  | o / /   # <--- fixed nodeline tail
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   258
        #     | |/ /           | |/ /
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   259
        #     o | |            o | |
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   260
        fix_nodeline_tail = len(node_lines) <= 2 and not add_padding_line
4344
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   261
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1c9f7aa7c8a5 graphlog: make some comment lines more like others in punctuation
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   262
        # nodeline is the line containing the node character (typically o)
4344
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parents:
diff changeset
   263
        nodeline = ["|", " "] * node_index
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parents:
diff changeset
   264
        if node in repo_parents:
4583
11cf78983961 Reverted changesets 9d1380e5c8c5 and 1d46169ec197: show @ as glog parent again.
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   265
            node_ch = "@"
4344
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parents:
diff changeset
   266
        else:
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diff changeset
   267
            node_ch = "o"
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   268
        nodeline.extend([node_ch, " "])
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parents:
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   269
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   270
        nodeline.extend(
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diff changeset
   271
            get_nodeline_edges_tail(
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   272
                node_index, prev_node_index, n_columns, n_columns_diff,
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diff changeset
   273
                prev_n_columns_diff, fix_nodeline_tail))
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parents:
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   274
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   275
        # shift_interline is the line containing the non-vertical
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   276
        # edges between this entry and the next
4344
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diff changeset
   277
        shift_interline = ["|", " "] * node_index
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parents:
diff changeset
   278
        if n_columns_diff == -1:
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diff changeset
   279
            n_spaces = 1
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diff changeset
   280
            edge_ch = "/"
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parents:
diff changeset
   281
        elif n_columns_diff == 0:
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parents:
diff changeset
   282
            n_spaces = 2
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parents:
diff changeset
   283
            edge_ch = "|"
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parents:
diff changeset
   284
        else:
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diff changeset
   285
            n_spaces = 3
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parents:
diff changeset
   286
            edge_ch = "\\"
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parents:
diff changeset
   287
        shift_interline.extend(n_spaces * [" "])
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parents:
diff changeset
   288
        shift_interline.extend([edge_ch, " "] * (n_columns - node_index - 1))
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parents:
diff changeset
   289
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   290
        # draw edges from the current node to its parents
4344
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parents:
diff changeset
   291
        draw_edges(edges, nodeline, shift_interline)
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diff changeset
   292
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diff changeset
   293
        # lines is the list of all graph lines to print
4344
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diff changeset
   294
        lines = [nodeline]
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        if add_padding_line:
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            lines.append(get_padding_line(node_index, n_columns, edges))
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        lines.append(shift_interline)
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        # make sure that there are as many graph lines as there are
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        # log strings
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        while len(node_lines) < len(lines):
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            node_lines.append("")
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        if len(lines) < len(node_lines):
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            extra_interline = ["|", " "] * (n_columns + n_columns_diff)
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            while len(lines) < len(node_lines):
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                lines.append(extra_interline)
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        # print lines
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        indentation_level = max(n_columns, n_columns + n_columns_diff)
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        for (line, logstr) in zip(lines, node_lines):
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            ui.write(format_line(line, indentation_level, logstr))
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        # ... and start over
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        prev_node_index = node_index
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        prev_n_columns_diff = n_columns_diff
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cmdtable = {
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    "glog":
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        (graphlog,
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         [('l', 'limit', '', _('limit number of changes displayed')),
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          ('p', 'patch', False, _('show patch')),
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          ('r', 'rev', [], _('show the specified revision or range')),
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         ] + templateopts,
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         _('hg glog [OPTION]... [FILE]')),
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}