author | Nishanth Amuluru <nishanth@fossee.in> |
Sun, 09 Jan 2011 11:13:36 +0530 | |
changeset 114 | 1a88b04adb39 |
parent 69 | c6bca38c1cbf |
permissions | -rw-r--r-- |
69
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# filemerge.py - file-level merge handling for Mercurial |
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# |
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# Copyright 2006, 2007, 2008 Matt Mackall <mpm@selenic.com> |
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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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|
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from node import short |
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from i18n import _ |
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import util, simplemerge, match, error |
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import os, tempfile, re, filecmp |
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def _toolstr(ui, tool, part, default=""): |
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return ui.config("merge-tools", tool + "." + part, default) |
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def _toolbool(ui, tool, part, default=False): |
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return ui.configbool("merge-tools", tool + "." + part, default) |
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def _toollist(ui, tool, part, default=[]): |
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return ui.configlist("merge-tools", tool + "." + part, default) |
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|
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_internal = ['internal:' + s |
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for s in 'fail local other merge prompt dump'.split()] |
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def _findtool(ui, tool): |
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if tool in _internal: |
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return tool |
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k = _toolstr(ui, tool, "regkey") |
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if k: |
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p = util.lookup_reg(k, _toolstr(ui, tool, "regname")) |
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if p: |
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p = util.find_exe(p + _toolstr(ui, tool, "regappend")) |
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if p: |
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return p |
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return util.find_exe(_toolstr(ui, tool, "executable", tool)) |
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def _picktool(repo, ui, path, binary, symlink): |
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def check(tool, pat, symlink, binary): |
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tmsg = tool |
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if pat: |
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tmsg += " specified for " + pat |
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if not _findtool(ui, tool): |
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if pat: # explicitly requested tool deserves a warning |
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ui.warn(_("couldn't find merge tool %s\n") % tmsg) |
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else: # configured but non-existing tools are more silent |
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ui.note(_("couldn't find merge tool %s\n") % tmsg) |
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elif symlink and not _toolbool(ui, tool, "symlink"): |
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ui.warn(_("tool %s can't handle symlinks\n") % tmsg) |
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elif binary and not _toolbool(ui, tool, "binary"): |
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ui.warn(_("tool %s can't handle binary\n") % tmsg) |
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elif not util.gui() and _toolbool(ui, tool, "gui"): |
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ui.warn(_("tool %s requires a GUI\n") % tmsg) |
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else: |
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return True |
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return False |
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# forcemerge comes from command line arguments, highest priority |
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force = ui.config('ui', 'forcemerge') |
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if force: |
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toolpath = _findtool(ui, force) |
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if toolpath: |
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return (force, '"' + toolpath + '"') |
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else: |
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# mimic HGMERGE if given tool not found |
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return (force, force) |
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|
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# HGMERGE takes next precedence |
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hgmerge = os.environ.get("HGMERGE") |
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if hgmerge: |
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return (hgmerge, hgmerge) |
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|
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# then patterns |
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for pat, tool in ui.configitems("merge-patterns"): |
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mf = match.match(repo.root, '', [pat]) |
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if mf(path) and check(tool, pat, symlink, False): |
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toolpath = _findtool(ui, tool) |
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return (tool, '"' + toolpath + '"') |
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# then merge tools |
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tools = {} |
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for k, v in ui.configitems("merge-tools"): |
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t = k.split('.')[0] |
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83 |
if t not in tools: |
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84 |
tools[t] = int(_toolstr(ui, t, "priority", "0")) |
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names = tools.keys() |
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tools = sorted([(-p, t) for t, p in tools.items()]) |
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uimerge = ui.config("ui", "merge") |
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if uimerge: |
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89 |
if uimerge not in names: |
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90 |
return (uimerge, uimerge) |
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91 |
tools.insert(0, (None, uimerge)) # highest priority |
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92 |
tools.append((None, "hgmerge")) # the old default, if found |
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93 |
for p, t in tools: |
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94 |
if check(t, None, symlink, binary): |
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95 |
toolpath = _findtool(ui, t) |
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96 |
return (t, '"' + toolpath + '"') |
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97 |
# internal merge as last resort |
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98 |
return (not (symlink or binary) and "internal:merge" or None, None) |
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99 |
|
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100 |
def _eoltype(data): |
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101 |
"Guess the EOL type of a file" |
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102 |
if '\0' in data: # binary |
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103 |
return None |
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104 |
if '\r\n' in data: # Windows |
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105 |
return '\r\n' |
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106 |
if '\r' in data: # Old Mac |
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107 |
return '\r' |
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108 |
if '\n' in data: # UNIX |
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109 |
return '\n' |
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110 |
return None # unknown |
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111 |
|
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112 |
def _matcheol(file, origfile): |
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113 |
"Convert EOL markers in a file to match origfile" |
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114 |
tostyle = _eoltype(open(origfile, "rb").read()) |
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115 |
if tostyle: |
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116 |
data = open(file, "rb").read() |
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117 |
style = _eoltype(data) |
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|
118 |
if style: |
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|
119 |
newdata = data.replace(style, tostyle) |
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120 |
if newdata != data: |
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121 |
open(file, "wb").write(newdata) |
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122 |
|
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123 |
def filemerge(repo, mynode, orig, fcd, fco, fca): |
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124 |
"""perform a 3-way merge in the working directory |
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125 |
|
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126 |
mynode = parent node before merge |
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127 |
orig = original local filename before merge |
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128 |
fco = other file context |
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129 |
fca = ancestor file context |
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130 |
fcd = local file context for current/destination file |
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131 |
""" |
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132 |
|
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133 |
def temp(prefix, ctx): |
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134 |
pre = "%s~%s." % (os.path.basename(ctx.path()), prefix) |
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|
135 |
(fd, name) = tempfile.mkstemp(prefix=pre) |
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|
136 |
data = repo.wwritedata(ctx.path(), ctx.data()) |
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137 |
f = os.fdopen(fd, "wb") |
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|
138 |
f.write(data) |
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|
139 |
f.close() |
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|
140 |
return name |
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|
141 |
|
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|
142 |
def isbin(ctx): |
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|
143 |
try: |
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|
144 |
return util.binary(ctx.data()) |
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|
145 |
except IOError: |
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|
146 |
return False |
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147 |
|
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148 |
if not fco.cmp(fcd): # files identical? |
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|
149 |
return None |
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|
150 |
|
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|
151 |
ui = repo.ui |
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152 |
fd = fcd.path() |
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|
153 |
binary = isbin(fcd) or isbin(fco) or isbin(fca) |
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|
154 |
symlink = 'l' in fcd.flags() + fco.flags() |
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|
155 |
tool, toolpath = _picktool(repo, ui, fd, binary, symlink) |
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|
156 |
ui.debug("picked tool '%s' for %s (binary %s symlink %s)\n" % |
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|
157 |
(tool, fd, binary, symlink)) |
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|
158 |
|
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|
159 |
if not tool or tool == 'internal:prompt': |
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|
160 |
tool = "internal:local" |
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|
161 |
if ui.promptchoice(_(" no tool found to merge %s\n" |
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|
162 |
"keep (l)ocal or take (o)ther?") % fd, |
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|
163 |
(_("&Local"), _("&Other")), 0): |
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|
164 |
tool = "internal:other" |
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|
165 |
if tool == "internal:local": |
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|
166 |
return 0 |
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|
167 |
if tool == "internal:other": |
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|
168 |
repo.wwrite(fd, fco.data(), fco.flags()) |
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|
169 |
return 0 |
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|
170 |
if tool == "internal:fail": |
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|
171 |
return 1 |
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|
172 |
|
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|
173 |
# do the actual merge |
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|
174 |
a = repo.wjoin(fd) |
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|
175 |
b = temp("base", fca) |
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|
176 |
c = temp("other", fco) |
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|
177 |
out = "" |
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|
178 |
back = a + ".orig" |
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|
179 |
util.copyfile(a, back) |
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|
180 |
|
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|
181 |
if orig != fco.path(): |
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|
182 |
ui.status(_("merging %s and %s to %s\n") % (orig, fco.path(), fd)) |
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|
183 |
else: |
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|
184 |
ui.status(_("merging %s\n") % fd) |
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|
185 |
|
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|
186 |
ui.debug("my %s other %s ancestor %s\n" % (fcd, fco, fca)) |
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|
187 |
|
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|
188 |
# do we attempt to simplemerge first? |
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|
189 |
try: |
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|
190 |
premerge = _toolbool(ui, tool, "premerge", not (binary or symlink)) |
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|
191 |
except error.ConfigError: |
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|
192 |
premerge = _toolstr(ui, tool, "premerge").lower() |
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|
193 |
valid = 'keep'.split() |
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changeset
|
194 |
if premerge not in valid: |
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|
195 |
_valid = ', '.join(["'" + v + "'" for v in valid]) |
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|
196 |
raise error.ConfigError(_("%s.premerge not valid " |
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|
197 |
"('%s' is neither boolean nor %s)") % |
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|
198 |
(tool, premerge, _valid)) |
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changeset
|
199 |
|
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|
200 |
if premerge: |
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|
201 |
r = simplemerge.simplemerge(ui, a, b, c, quiet=True) |
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|
202 |
if not r: |
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|
203 |
ui.debug(" premerge successful\n") |
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|
204 |
os.unlink(back) |
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|
205 |
os.unlink(b) |
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|
206 |
os.unlink(c) |
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changeset
|
207 |
return 0 |
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changeset
|
208 |
if premerge != 'keep': |
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|
209 |
util.copyfile(back, a) # restore from backup and try again |
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|
210 |
|
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|
211 |
env = dict(HG_FILE=fd, |
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|
212 |
HG_MY_NODE=short(mynode), |
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|
213 |
HG_OTHER_NODE=str(fco.changectx()), |
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|
214 |
HG_BASE_NODE=str(fca.changectx()), |
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|
215 |
HG_MY_ISLINK='l' in fcd.flags(), |
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|
216 |
HG_OTHER_ISLINK='l' in fco.flags(), |
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parents:
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|
217 |
HG_BASE_ISLINK='l' in fca.flags()) |
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changeset
|
218 |
|
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changeset
|
219 |
if tool == "internal:merge": |
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changeset
|
220 |
r = simplemerge.simplemerge(ui, a, b, c, label=['local', 'other']) |
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|
221 |
elif tool == 'internal:dump': |
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changeset
|
222 |
a = repo.wjoin(fd) |
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parents:
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changeset
|
223 |
util.copyfile(a, a + ".local") |
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Nishanth Amuluru <nishanth@fossee.in>
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diff
changeset
|
224 |
repo.wwrite(fd + ".other", fco.data(), fco.flags()) |
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parents:
diff
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|
225 |
repo.wwrite(fd + ".base", fca.data(), fca.flags()) |
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|
226 |
return 1 # unresolved |
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|
227 |
else: |
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diff
changeset
|
228 |
args = _toolstr(ui, tool, "args", '$local $base $other') |
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changeset
|
229 |
if "$output" in args: |
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diff
changeset
|
230 |
out, a = a, back # read input from backup, write to original |
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diff
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|
231 |
replace = dict(local=a, base=b, other=c, output=out) |
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232 |
args = util.interpolate(r'\$', replace, args, |
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233 |
lambda s: '"%s"' % util.localpath(s)) |
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234 |
r = util.system(toolpath + ' ' + args, cwd=repo.root, environ=env) |
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235 |
|
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236 |
if not r and (_toolbool(ui, tool, "checkconflicts") or |
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237 |
'conflicts' in _toollist(ui, tool, "check")): |
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238 |
if re.search("^(<<<<<<< .*|=======|>>>>>>> .*)$", fcd.data(), |
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239 |
re.MULTILINE): |
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240 |
r = 1 |
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241 |
|
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242 |
checked = False |
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243 |
if 'prompt' in _toollist(ui, tool, "check"): |
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244 |
checked = True |
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245 |
if ui.promptchoice(_("was merge of '%s' successful (yn)?") % fd, |
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246 |
(_("&Yes"), _("&No")), 1): |
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247 |
r = 1 |
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248 |
|
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249 |
if not r and not checked and (_toolbool(ui, tool, "checkchanged") or |
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250 |
'changed' in _toollist(ui, tool, "check")): |
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251 |
if filecmp.cmp(repo.wjoin(fd), back): |
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252 |
if ui.promptchoice(_(" output file %s appears unchanged\n" |
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253 |
"was merge successful (yn)?") % fd, |
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254 |
(_("&Yes"), _("&No")), 1): |
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255 |
r = 1 |
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256 |
|
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257 |
if _toolbool(ui, tool, "fixeol"): |
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258 |
_matcheol(repo.wjoin(fd), back) |
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259 |
|
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260 |
if r: |
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261 |
ui.warn(_("merging %s failed!\n") % fd) |
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262 |
else: |
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263 |
os.unlink(back) |
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264 |
|
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265 |
os.unlink(b) |
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266 |
os.unlink(c) |
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267 |
return r |