bundle2: extract a _payloadchunks method for part
We are preparing streaming capability for part. So the generation of payload
chunk will becomes more complex. We extract this part in its own function before
any changes.
# filemerge.py - file-level merge handling for Mercurial
#
# Copyright 2006, 2007, 2008 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from node import short
from i18n import _
import util, simplemerge, match, error
import os, tempfile, re, filecmp
def _toolstr(ui, tool, part, default=""):
return ui.config("merge-tools", tool + "." + part, default)
def _toolbool(ui, tool, part, default=False):
return ui.configbool("merge-tools", tool + "." + part, default)
def _toollist(ui, tool, part, default=[]):
return ui.configlist("merge-tools", tool + "." + part, default)
internals = {}
def internaltool(name, trymerge, onfailure=None):
'''return a decorator for populating internal merge tool table'''
def decorator(func):
fullname = 'internal:' + name
func.__doc__ = "``%s``\n" % fullname + func.__doc__.strip()
internals[fullname] = func
func.trymerge = trymerge
func.onfailure = onfailure
return func
return decorator
def _findtool(ui, tool):
if tool in internals:
return tool
for kn in ("regkey", "regkeyalt"):
k = _toolstr(ui, tool, kn)
if not k:
continue
p = util.lookupreg(k, _toolstr(ui, tool, "regname"))
if p:
p = util.findexe(p + _toolstr(ui, tool, "regappend"))
if p:
return p
exe = _toolstr(ui, tool, "executable", tool)
return util.findexe(util.expandpath(exe))
def _picktool(repo, ui, path, binary, symlink):
def check(tool, pat, symlink, binary):
tmsg = tool
if pat:
tmsg += " specified for " + pat
if not _findtool(ui, tool):
if pat: # explicitly requested tool deserves a warning
ui.warn(_("couldn't find merge tool %s\n") % tmsg)
else: # configured but non-existing tools are more silent
ui.note(_("couldn't find merge tool %s\n") % tmsg)
elif symlink and not _toolbool(ui, tool, "symlink"):
ui.warn(_("tool %s can't handle symlinks\n") % tmsg)
elif binary and not _toolbool(ui, tool, "binary"):
ui.warn(_("tool %s can't handle binary\n") % tmsg)
elif not util.gui() and _toolbool(ui, tool, "gui"):
ui.warn(_("tool %s requires a GUI\n") % tmsg)
else:
return True
return False
# forcemerge comes from command line arguments, highest priority
force = ui.config('ui', 'forcemerge')
if force:
toolpath = _findtool(ui, force)
if toolpath:
return (force, util.shellquote(toolpath))
else:
# mimic HGMERGE if given tool not found
return (force, force)
# HGMERGE takes next precedence
hgmerge = os.environ.get("HGMERGE")
if hgmerge:
return (hgmerge, hgmerge)
# then patterns
for pat, tool in ui.configitems("merge-patterns"):
mf = match.match(repo.root, '', [pat])
if mf(path) and check(tool, pat, symlink, False):
toolpath = _findtool(ui, tool)
return (tool, util.shellquote(toolpath))
# then merge tools
tools = {}
for k, v in ui.configitems("merge-tools"):
t = k.split('.')[0]
if t not in tools:
tools[t] = int(_toolstr(ui, t, "priority", "0"))
names = tools.keys()
tools = sorted([(-p, t) for t, p in tools.items()])
uimerge = ui.config("ui", "merge")
if uimerge:
if uimerge not in names:
return (uimerge, uimerge)
tools.insert(0, (None, uimerge)) # highest priority
tools.append((None, "hgmerge")) # the old default, if found
for p, t in tools:
if check(t, None, symlink, binary):
toolpath = _findtool(ui, t)
return (t, util.shellquote(toolpath))
# internal merge or prompt as last resort
if symlink or binary:
return "internal:prompt", None
return "internal:merge", None
def _eoltype(data):
"Guess the EOL type of a file"
if '\0' in data: # binary
return None
if '\r\n' in data: # Windows
return '\r\n'
if '\r' in data: # Old Mac
return '\r'
if '\n' in data: # UNIX
return '\n'
return None # unknown
def _matcheol(file, origfile):
"Convert EOL markers in a file to match origfile"
tostyle = _eoltype(util.readfile(origfile))
if tostyle:
data = util.readfile(file)
style = _eoltype(data)
if style:
newdata = data.replace(style, tostyle)
if newdata != data:
util.writefile(file, newdata)
@internaltool('prompt', False)
def _iprompt(repo, mynode, orig, fcd, fco, fca, toolconf):
"""Asks the user which of the local or the other version to keep as
the merged version."""
ui = repo.ui
fd = fcd.path()
if ui.promptchoice(_(" no tool found to merge %s\n"
"keep (l)ocal or take (o)ther?"
"$$ &Local $$ &Other") % fd, 0):
return _iother(repo, mynode, orig, fcd, fco, fca, toolconf)
else:
return _ilocal(repo, mynode, orig, fcd, fco, fca, toolconf)
@internaltool('local', False)
def _ilocal(repo, mynode, orig, fcd, fco, fca, toolconf):
"""Uses the local version of files as the merged version."""
return 0
@internaltool('other', False)
def _iother(repo, mynode, orig, fcd, fco, fca, toolconf):
"""Uses the other version of files as the merged version."""
repo.wwrite(fcd.path(), fco.data(), fco.flags())
return 0
@internaltool('fail', False)
def _ifail(repo, mynode, orig, fcd, fco, fca, toolconf):
"""
Rather than attempting to merge files that were modified on both
branches, it marks them as unresolved. The resolve command must be
used to resolve these conflicts."""
return 1
def _premerge(repo, toolconf, files):
tool, toolpath, binary, symlink = toolconf
if symlink:
return 1
a, b, c, back = files
ui = repo.ui
# do we attempt to simplemerge first?
try:
premerge = _toolbool(ui, tool, "premerge", not binary)
except error.ConfigError:
premerge = _toolstr(ui, tool, "premerge").lower()
valid = 'keep'.split()
if premerge not in valid:
_valid = ', '.join(["'" + v + "'" for v in valid])
raise error.ConfigError(_("%s.premerge not valid "
"('%s' is neither boolean nor %s)") %
(tool, premerge, _valid))
if premerge:
r = simplemerge.simplemerge(ui, a, b, c, quiet=True)
if not r:
ui.debug(" premerge successful\n")
return 0
if premerge != 'keep':
util.copyfile(back, a) # restore from backup and try again
return 1 # continue merging
@internaltool('merge', True,
_("merging %s incomplete! "
"(edit conflicts, then use 'hg resolve --mark')\n"))
def _imerge(repo, mynode, orig, fcd, fco, fca, toolconf, files):
"""
Uses the internal non-interactive simple merge algorithm for merging
files. It will fail if there are any conflicts and leave markers in
the partially merged file."""
tool, toolpath, binary, symlink = toolconf
if symlink:
repo.ui.warn(_('warning: internal:merge cannot merge symlinks '
'for %s\n') % fcd.path())
return False, 1
r = _premerge(repo, toolconf, files)
if r:
a, b, c, back = files
ui = repo.ui
r = simplemerge.simplemerge(ui, a, b, c, label=['local', 'other'])
return True, r
return False, 0
@internaltool('dump', True)
def _idump(repo, mynode, orig, fcd, fco, fca, toolconf, files):
"""
Creates three versions of the files to merge, containing the
contents of local, other and base. These files can then be used to
perform a merge manually. If the file to be merged is named
``a.txt``, these files will accordingly be named ``a.txt.local``,
``a.txt.other`` and ``a.txt.base`` and they will be placed in the
same directory as ``a.txt``."""
r = _premerge(repo, toolconf, files)
if r:
a, b, c, back = files
fd = fcd.path()
util.copyfile(a, a + ".local")
repo.wwrite(fd + ".other", fco.data(), fco.flags())
repo.wwrite(fd + ".base", fca.data(), fca.flags())
return False, r
def _xmerge(repo, mynode, orig, fcd, fco, fca, toolconf, files):
r = _premerge(repo, toolconf, files)
if r:
tool, toolpath, binary, symlink = toolconf
a, b, c, back = files
out = ""
env = {'HG_FILE': fcd.path(),
'HG_MY_NODE': short(mynode),
'HG_OTHER_NODE': str(fco.changectx()),
'HG_BASE_NODE': str(fca.changectx()),
'HG_MY_ISLINK': 'l' in fcd.flags(),
'HG_OTHER_ISLINK': 'l' in fco.flags(),
'HG_BASE_ISLINK': 'l' in fca.flags(),
}
ui = repo.ui
args = _toolstr(ui, tool, "args", '$local $base $other')
if "$output" in args:
out, a = a, back # read input from backup, write to original
replace = {'local': a, 'base': b, 'other': c, 'output': out}
args = util.interpolate(r'\$', replace, args,
lambda s: util.shellquote(util.localpath(s)))
r = util.system(toolpath + ' ' + args, cwd=repo.root, environ=env,
out=ui.fout)
return True, r
return False, 0
def filemerge(repo, mynode, orig, fcd, fco, fca):
"""perform a 3-way merge in the working directory
mynode = parent node before merge
orig = original local filename before merge
fco = other file context
fca = ancestor file context
fcd = local file context for current/destination file
"""
def temp(prefix, ctx):
pre = "%s~%s." % (os.path.basename(ctx.path()), prefix)
(fd, name) = tempfile.mkstemp(prefix=pre)
data = repo.wwritedata(ctx.path(), ctx.data())
f = os.fdopen(fd, "wb")
f.write(data)
f.close()
return name
if not fco.cmp(fcd): # files identical?
return None
ui = repo.ui
fd = fcd.path()
binary = fcd.isbinary() or fco.isbinary() or fca.isbinary()
symlink = 'l' in fcd.flags() + fco.flags()
tool, toolpath = _picktool(repo, ui, fd, binary, symlink)
ui.debug("picked tool '%s' for %s (binary %s symlink %s)\n" %
(tool, fd, binary, symlink))
if tool in internals:
func = internals[tool]
trymerge = func.trymerge
onfailure = func.onfailure
else:
func = _xmerge
trymerge = True
onfailure = _("merging %s failed!\n")
toolconf = tool, toolpath, binary, symlink
if not trymerge:
return func(repo, mynode, orig, fcd, fco, fca, toolconf)
a = repo.wjoin(fd)
b = temp("base", fca)
c = temp("other", fco)
back = a + ".orig"
util.copyfile(a, back)
if orig != fco.path():
ui.status(_("merging %s and %s to %s\n") % (orig, fco.path(), fd))
else:
ui.status(_("merging %s\n") % fd)
ui.debug("my %s other %s ancestor %s\n" % (fcd, fco, fca))
needcheck, r = func(repo, mynode, orig, fcd, fco, fca, toolconf,
(a, b, c, back))
if not needcheck:
if r:
if onfailure:
ui.warn(onfailure % fd)
else:
os.unlink(back)
os.unlink(b)
os.unlink(c)
return r
if not r and (_toolbool(ui, tool, "checkconflicts") or
'conflicts' in _toollist(ui, tool, "check")):
if re.search("^(<<<<<<< .*|=======|>>>>>>> .*)$", fcd.data(),
re.MULTILINE):
r = 1
checked = False
if 'prompt' in _toollist(ui, tool, "check"):
checked = True
if ui.promptchoice(_("was merge of '%s' successful (yn)?"
"$$ &Yes $$ &No") % fd, 1):
r = 1
if not r and not checked and (_toolbool(ui, tool, "checkchanged") or
'changed' in _toollist(ui, tool, "check")):
if filecmp.cmp(a, back):
if ui.promptchoice(_(" output file %s appears unchanged\n"
"was merge successful (yn)?"
"$$ &Yes $$ &No") % fd, 1):
r = 1
if _toolbool(ui, tool, "fixeol"):
_matcheol(a, back)
if r:
if onfailure:
ui.warn(onfailure % fd)
else:
os.unlink(back)
os.unlink(b)
os.unlink(c)
return r
# tell hggettext to extract docstrings from these functions:
i18nfunctions = internals.values()