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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 the
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# GNU General Public License version 2 or any later version.
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'''command to view revision graphs from a shell
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This extension adds a --graph option to the incoming, outgoing and log
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commands. When this options is given, an ASCII representation of the
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revision graph is also shown.
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'''
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import os
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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 import cmdutil, commands, extensions
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from mercurial import hg, util, graphmod
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ASCIIDATA = 'ASC'
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def asciiedges(seen, rev, parents):
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"""adds edge info to changelog DAG walk suitable for ascii()"""
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if rev not in seen:
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seen.append(rev)
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nodeidx = seen.index(rev)
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knownparents = []
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newparents = []
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for parent in parents:
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if parent in seen:
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knownparents.append(parent)
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else:
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newparents.append(parent)
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ncols = len(seen)
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seen[nodeidx:nodeidx + 1] = newparents
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edges = [(nodeidx, seen.index(p)) for p in knownparents]
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if len(newparents) > 0:
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edges.append((nodeidx, nodeidx))
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if len(newparents) > 1:
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edges.append((nodeidx, nodeidx + 1))
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nmorecols = len(seen) - ncols
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return nodeidx, edges, ncols, nmorecols
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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 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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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 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 asciistate():
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"""returns the initial value for the "state" argument to ascii()"""
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return [0, 0]
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def ascii(ui, state, type, char, text, coldata):
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"""prints an ASCII graph of the DAG
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takes the following arguments (one call per node in the graph):
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- ui to write to
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- Somewhere to keep the needed state in (init to asciistate())
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- Column of the current node in the set of ongoing edges.
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- Type indicator of node data == ASCIIDATA.
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- Payload: (char, lines):
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- Character to use as node's symbol.
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- List of lines to display as the node's text.
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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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idx, edges, ncols, coldiff = coldata
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assert -2 < coldiff < 2
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if coldiff == -1:
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# Transform
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#
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# | | | | | |
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# o | | into o---+
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# |X / |/ /
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# | | | |
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fix_long_right_edges(edges)
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# add_padding_line says whether to rewrite
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#
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# | | | | | | | |
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# | o---+ into | o---+
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# | / / | | | # <--- padding line
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# o | | | / /
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# o | |
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add_padding_line = (len(text) > 2 and coldiff == -1 and
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[x for (x, y) in edges if x + 1 < y])
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# fix_nodeline_tail says whether to rewrite
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#
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# | | o | | | | o | |
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# | | |/ / | | |/ /
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# | o | | into | o / / # <--- fixed nodeline tail
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# | |/ / | |/ /
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# o | | o | |
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fix_nodeline_tail = len(text) <= 2 and not add_padding_line
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# nodeline is the line containing the node character (typically o)
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nodeline = ["|", " "] * idx
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nodeline.extend([char, " "])
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nodeline.extend(
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get_nodeline_edges_tail(idx, state[1], ncols, coldiff,
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state[0], fix_nodeline_tail))
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# shift_interline is the line containing the non-vertical
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# edges between this entry and the next
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shift_interline = ["|", " "] * idx
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if coldiff == -1:
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n_spaces = 1
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edge_ch = "/"
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elif coldiff == 0:
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n_spaces = 2
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edge_ch = "|"
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else:
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n_spaces = 3
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edge_ch = "\\"
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shift_interline.extend(n_spaces * [" "])
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shift_interline.extend([edge_ch, " "] * (ncols - idx - 1))
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# draw edges from the current node to its parents
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draw_edges(edges, nodeline, shift_interline)
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# lines is the list of all graph lines to print
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lines = [nodeline]
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if add_padding_line:
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lines.append(get_padding_line(idx, ncols, 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(text) < len(lines):
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text.append("")
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if len(lines) < len(text):
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extra_interline = ["|", " "] * (ncols + coldiff)
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while len(lines) < len(text):
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lines.append(extra_interline)
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# print lines
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indentation_level = max(ncols, ncols + coldiff)
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for (line, logstr) in zip(lines, text):
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ln = "%-*s %s" % (2 * indentation_level, "".join(line), logstr)
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ui.write(ln.rstrip() + '\n')
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# ... and start over
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state[0] = coldiff
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state[1] = idx
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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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if len(revs) == 0:
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return (nullrev, nullrev)
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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 check_unsupported_flags(opts):
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for op in ["follow", "follow_first", "date", "copies", "keyword", "remove",
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"only_merges", "user", "branch", "only_branch", "prune",
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"newest_first", "no_merges", "include", "exclude"]:
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if op in opts and opts[op]:
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raise util.Abort(_("--graph option is incompatible with --%s")
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% op.replace("_", "-"))
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def generate(ui, dag, displayer, showparents, edgefn):
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seen, state = [], asciistate()
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for rev, type, ctx, parents in dag:
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char = ctx.node() in showparents and '@' or 'o'
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displayer.show(ctx)
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lines = displayer.hunk.pop(rev).split('\n')[:-1]
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displayer.flush(rev)
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ascii(ui, state, type, char, lines, edgefn(seen, rev, parents))
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displayer.close()
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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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Print a revision history alongside a revision graph drawn with
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ASCII characters.
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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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check_unsupported_flags(opts)
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limit = cmdutil.loglimit(opts)
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start, stop = get_revs(repo, opts["rev"])
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if start == nullrev:
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return
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if path:
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path = util.canonpath(repo.root, os.getcwd(), path)
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if path: # could be reset in canonpath
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revdag = graphmod.filerevs(repo, path, start, stop, limit)
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else:
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if limit is not None:
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stop = max(stop, start - limit + 1)
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revdag = graphmod.revisions(repo, start, stop)
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displayer = show_changeset(ui, repo, opts, buffered=True)
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showparents = [ctx.node() for ctx in repo[None].parents()]
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generate(ui, revdag, displayer, showparents, asciiedges)
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def graphrevs(repo, nodes, opts):
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limit = cmdutil.loglimit(opts)
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nodes.reverse()
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if limit is not None:
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nodes = nodes[:limit]
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return graphmod.nodes(repo, nodes)
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def goutgoing(ui, repo, dest=None, **opts):
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"""show the outgoing changesets alongside an ASCII revision graph
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Print the outgoing changesets alongside a revision graph drawn with
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ASCII characters.
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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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check_unsupported_flags(opts)
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o = hg._outgoing(ui, repo, dest, opts)
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if o is None:
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return
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revdag = graphrevs(repo, o, opts)
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displayer = show_changeset(ui, repo, opts, buffered=True)
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showparents = [ctx.node() for ctx in repo[None].parents()]
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generate(ui, revdag, displayer, showparents, asciiedges)
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def gincoming(ui, repo, source="default", **opts):
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"""show the incoming changesets alongside an ASCII revision graph
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Print the incoming changesets alongside a revision graph drawn with
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ASCII characters.
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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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def subreporecurse():
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return 1
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check_unsupported_flags(opts)
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def display(other, chlist, displayer):
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revdag = graphrevs(other, chlist, opts)
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showparents = [ctx.node() for ctx in repo[None].parents()]
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generate(ui, revdag, displayer, showparents, asciiedges)
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hg._incoming(display, subreporecurse, ui, repo, source, opts, buffered=True)
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def uisetup(ui):
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'''Initialize the extension.'''
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_wrapcmd(ui, 'log', commands.table, graphlog)
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_wrapcmd(ui, 'incoming', commands.table, gincoming)
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_wrapcmd(ui, 'outgoing', commands.table, goutgoing)
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def _wrapcmd(ui, cmd, table, wrapfn):
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'''wrap the command'''
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def graph(orig, *args, **kwargs):
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if kwargs['graph']:
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try:
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return wrapfn(*args, **kwargs)
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except TypeError, e:
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if len(args) > wrapfn.func_code.co_argcount:
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raise util.Abort(_('--graph option allows at most one file'))
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raise
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return orig(*args, **kwargs)
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entry = extensions.wrapcommand(table, cmd, graph)
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entry[1].append(('G', 'graph', None, _("show the revision DAG")))
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cmdtable = {
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"glog":
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(graphlog,
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[('l', 'limit', '',
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_('limit number of changes displayed'), _('NUM')),
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('p', 'patch', False, _('show patch')),
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('r', 'rev', [],
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_('show the specified revision or range'), _('REV')),
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] + templateopts,
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_('hg glog [OPTION]... [FILE]')),
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}
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