|
|
# drawdag.py - convert ASCII revision DAG to actual changesets
|
|
|
#
|
|
|
# Copyright 2016 Facebook, Inc.
|
|
|
#
|
|
|
# This software may be used and distributed according to the terms of the
|
|
|
# GNU General Public License version 2 or any later version.
|
|
|
"""
|
|
|
create changesets from an ASCII graph for testing purpose.
|
|
|
|
|
|
For example, given the following input::
|
|
|
|
|
|
c d
|
|
|
|/
|
|
|
b
|
|
|
|
|
|
|
a
|
|
|
|
|
|
4 changesets and 4 local tags will be created.
|
|
|
`hg log -G -T "{rev} {desc} (tag: {tags})"` will output::
|
|
|
|
|
|
o 3 d (tag: d tip)
|
|
|
|
|
|
|
| o 2 c (tag: c)
|
|
|
|/
|
|
|
o 1 b (tag: b)
|
|
|
|
|
|
|
o 0 a (tag: a)
|
|
|
|
|
|
For root nodes (nodes without parents) in the graph, they can be revsets
|
|
|
pointing to existing nodes. The ASCII graph could also have disconnected
|
|
|
components with same names referring to the same changeset.
|
|
|
|
|
|
Therefore, given the repo having the 4 changesets (and tags) above, with the
|
|
|
following ASCII graph as input::
|
|
|
|
|
|
foo bar bar foo
|
|
|
| / | |
|
|
|
ancestor(c,d) a baz
|
|
|
|
|
|
The result (`hg log -G -T "{desc}"`) will look like::
|
|
|
|
|
|
o foo
|
|
|
|\
|
|
|
+---o bar
|
|
|
| | |
|
|
|
| o | baz
|
|
|
| /
|
|
|
+---o d
|
|
|
| |
|
|
|
+---o c
|
|
|
| |
|
|
|
o | b
|
|
|
|/
|
|
|
o a
|
|
|
|
|
|
Note that if you take the above `hg log` output directly as input. It will work
|
|
|
as expected - the result would be an isomorphic graph::
|
|
|
|
|
|
o foo
|
|
|
|\
|
|
|
| | o d
|
|
|
| |/
|
|
|
| | o c
|
|
|
| |/
|
|
|
| | o bar
|
|
|
| |/|
|
|
|
| o | b
|
|
|
| |/
|
|
|
o / baz
|
|
|
/
|
|
|
o a
|
|
|
|
|
|
This is because 'o' is specially handled in the input: instead of using 'o' as
|
|
|
the node name, the word to the right will be used.
|
|
|
"""
|
|
|
from __future__ import absolute_import, print_function
|
|
|
|
|
|
import collections
|
|
|
import itertools
|
|
|
|
|
|
from mercurial.i18n import _
|
|
|
from mercurial import (
|
|
|
cmdutil,
|
|
|
context,
|
|
|
error,
|
|
|
node,
|
|
|
scmutil,
|
|
|
tags as tagsmod,
|
|
|
)
|
|
|
|
|
|
cmdtable = {}
|
|
|
command = cmdutil.command(cmdtable)
|
|
|
|
|
|
_pipechars = '\\/+-|'
|
|
|
_nonpipechars = ''.join(chr(i) for i in xrange(33, 127)
|
|
|
if chr(i) not in _pipechars)
|
|
|
|
|
|
def _isname(ch):
|
|
|
"""char -> bool. return True if ch looks like part of a name, False
|
|
|
otherwise"""
|
|
|
return ch in _nonpipechars
|
|
|
|
|
|
def _parseasciigraph(text):
|
|
|
"""str -> {str : [str]}. convert the ASCII graph to edges"""
|
|
|
lines = text.splitlines()
|
|
|
edges = collections.defaultdict(list) # {node: []}
|
|
|
|
|
|
def get(y, x):
|
|
|
"""(int, int) -> char. give a coordinate, return the char. return a
|
|
|
space for anything out of range"""
|
|
|
if x < 0 or y < 0:
|
|
|
return ' '
|
|
|
try:
|
|
|
return lines[y][x]
|
|
|
except IndexError:
|
|
|
return ' '
|
|
|
|
|
|
def getname(y, x):
|
|
|
"""(int, int) -> str. like get(y, x) but concatenate left and right
|
|
|
parts. if name is an 'o', try to replace it to the right"""
|
|
|
result = ''
|
|
|
for i in itertools.count(0):
|
|
|
ch = get(y, x - i)
|
|
|
if not _isname(ch):
|
|
|
break
|
|
|
result = ch + result
|
|
|
for i in itertools.count(1):
|
|
|
ch = get(y, x + i)
|
|
|
if not _isname(ch):
|
|
|
break
|
|
|
result += ch
|
|
|
if result == 'o':
|
|
|
# special handling, find the name to the right
|
|
|
result = ''
|
|
|
for i in itertools.count(2):
|
|
|
ch = get(y, x + i)
|
|
|
if ch == ' ' or ch in _pipechars:
|
|
|
if result or x + i >= len(lines[y]):
|
|
|
break
|
|
|
else:
|
|
|
result += ch
|
|
|
return result or 'o'
|
|
|
return result
|
|
|
|
|
|
def parents(y, x):
|
|
|
"""(int, int) -> [str]. follow the ASCII edges at given position,
|
|
|
return a list of parents"""
|
|
|
visited = set([(y, x)])
|
|
|
visit = []
|
|
|
result = []
|
|
|
|
|
|
def follow(y, x, expected):
|
|
|
"""conditionally append (y, x) to visit array, if it's a char
|
|
|
in excepted. 'o' in expected means an '_isname' test.
|
|
|
if '-' (or '+') is not in excepted, and get(y, x) is '-' (or '+'),
|
|
|
the next line (y + 1, x) will be checked instead."""
|
|
|
ch = get(y, x)
|
|
|
if any(ch == c and c not in expected for c in '-+'):
|
|
|
y += 1
|
|
|
return follow(y + 1, x, expected)
|
|
|
if ch in expected or ('o' in expected and _isname(ch)):
|
|
|
visit.append((y, x))
|
|
|
|
|
|
# -o- # starting point:
|
|
|
# /|\ # follow '-' (horizontally), and '/|\' (to the bottom)
|
|
|
follow(y + 1, x, '|')
|
|
|
follow(y + 1, x - 1, '/')
|
|
|
follow(y + 1, x + 1, '\\')
|
|
|
follow(y, x - 1, '-')
|
|
|
follow(y, x + 1, '-')
|
|
|
|
|
|
while visit:
|
|
|
y, x = visit.pop()
|
|
|
if (y, x) in visited:
|
|
|
continue
|
|
|
visited.add((y, x))
|
|
|
ch = get(y, x)
|
|
|
if _isname(ch):
|
|
|
result.append(getname(y, x))
|
|
|
continue
|
|
|
elif ch == '|':
|
|
|
follow(y + 1, x, '/|o')
|
|
|
follow(y + 1, x - 1, '/')
|
|
|
follow(y + 1, x + 1, '\\')
|
|
|
elif ch == '+':
|
|
|
follow(y, x - 1, '-')
|
|
|
follow(y, x + 1, '-')
|
|
|
follow(y + 1, x - 1, '/')
|
|
|
follow(y + 1, x + 1, '\\')
|
|
|
follow(y + 1, x, '|')
|
|
|
elif ch == '\\':
|
|
|
follow(y + 1, x + 1, '\\|o')
|
|
|
elif ch == '/':
|
|
|
follow(y + 1, x - 1, '/|o')
|
|
|
elif ch == '-':
|
|
|
follow(y, x - 1, '-+o')
|
|
|
follow(y, x + 1, '-+o')
|
|
|
return result
|
|
|
|
|
|
for y, line in enumerate(lines):
|
|
|
for x, ch in enumerate(line):
|
|
|
if ch == '#': # comment
|
|
|
break
|
|
|
if _isname(ch):
|
|
|
edges[getname(y, x)] += parents(y, x)
|
|
|
|
|
|
return dict(edges)
|
|
|
|
|
|
class simplefilectx(object):
|
|
|
def __init__(self, path, data):
|
|
|
self._data = data
|
|
|
self._path = path
|
|
|
|
|
|
def data(self):
|
|
|
return self._data
|
|
|
|
|
|
def path(self):
|
|
|
return self._path
|
|
|
|
|
|
def renamed(self):
|
|
|
return None
|
|
|
|
|
|
def flags(self):
|
|
|
return ''
|
|
|
|
|
|
class simplecommitctx(context.committablectx):
|
|
|
def __init__(self, repo, name, parentctxs, added=None):
|
|
|
opts = {
|
|
|
'changes': scmutil.status([], added or [], [], [], [], [], []),
|
|
|
'date': '0 0',
|
|
|
'extra': {'branch': 'default'},
|
|
|
}
|
|
|
super(simplecommitctx, self).__init__(self, name, **opts)
|
|
|
self._repo = repo
|
|
|
self._name = name
|
|
|
self._parents = parentctxs
|
|
|
self._parents.sort(key=lambda c: c.node())
|
|
|
while len(self._parents) < 2:
|
|
|
self._parents.append(repo[node.nullid])
|
|
|
|
|
|
def filectx(self, key):
|
|
|
return simplefilectx(key, self._name)
|
|
|
|
|
|
def commit(self):
|
|
|
return self._repo.commitctx(self)
|
|
|
|
|
|
def _walkgraph(edges):
|
|
|
"""yield node, parents in topologically order"""
|
|
|
visible = set(edges.keys())
|
|
|
remaining = {} # {str: [str]}
|
|
|
for k, vs in edges.iteritems():
|
|
|
for v in vs:
|
|
|
if v not in remaining:
|
|
|
remaining[v] = []
|
|
|
remaining[k] = vs[:]
|
|
|
while remaining:
|
|
|
leafs = [k for k, v in remaining.items() if not v]
|
|
|
if not leafs:
|
|
|
raise error.Abort(_('the graph has cycles'))
|
|
|
for leaf in sorted(leafs):
|
|
|
if leaf in visible:
|
|
|
yield leaf, edges[leaf]
|
|
|
del remaining[leaf]
|
|
|
for k, v in remaining.iteritems():
|
|
|
if leaf in v:
|
|
|
v.remove(leaf)
|
|
|
|
|
|
@command('debugdrawdag', [])
|
|
|
def debugdrawdag(ui, repo, **opts):
|
|
|
"""read an ASCII graph from stdin and create changesets
|
|
|
|
|
|
The ASCII graph is like what :hg:`log -G` outputs, with each `o` replaced
|
|
|
to the name of the node. The command will create dummy changesets and local
|
|
|
tags with those names to make the dummy changesets easier to be referred
|
|
|
to.
|
|
|
|
|
|
If the name of a node is a single character 'o', It will be replaced by the
|
|
|
word to the right. This makes it easier to reuse
|
|
|
:hg:`log -G -T '{desc}'` outputs.
|
|
|
|
|
|
For root (no parents) nodes, revset can be used to query existing repo.
|
|
|
Note that the revset cannot have confusing characters which can be seen as
|
|
|
the part of the graph edges, like `|/+-\`.
|
|
|
"""
|
|
|
text = ui.fin.read()
|
|
|
|
|
|
# parse the graph and make sure len(parents) <= 2 for each node
|
|
|
edges = _parseasciigraph(text)
|
|
|
for k, v in edges.iteritems():
|
|
|
if len(v) > 2:
|
|
|
raise error.Abort(_('%s: too many parents: %s')
|
|
|
% (k, ' '.join(v)))
|
|
|
|
|
|
committed = {None: node.nullid} # {name: node}
|
|
|
|
|
|
# for leaf nodes, try to find existing nodes in repo
|
|
|
for name, parents in edges.iteritems():
|
|
|
if len(parents) == 0:
|
|
|
try:
|
|
|
committed[name] = scmutil.revsingle(repo, name)
|
|
|
except error.RepoLookupError:
|
|
|
pass
|
|
|
|
|
|
# commit in topological order
|
|
|
for name, parents in _walkgraph(edges):
|
|
|
if name in committed:
|
|
|
continue
|
|
|
pctxs = [repo[committed[n]] for n in parents]
|
|
|
ctx = simplecommitctx(repo, name, pctxs, [name])
|
|
|
n = ctx.commit()
|
|
|
committed[name] = n
|
|
|
tagsmod.tag(repo, name, n, message=None, user=None, date=None,
|
|
|
local=True)
|
|
|
|
