57
57
def __init__(self):
58
58
hooks.Hooks.__init__(self)
59
59
self.create_hook(hooks.HookPoint('merge_file_content',
60
"Called when file content needs to be merged (including when one "
61
"side has deleted the file and the other has changed it)."
62
"merge_file_content is called with a "
63
"bzrlib.merge.MergeHookParams. The function should return a tuple "
64
"of (status, lines), where status is one of 'not_applicable', "
65
"'success', 'conflicted', or 'delete'. If status is success or "
66
"conflicted, then lines should be an iterable of strings of the "
60
"Called with a bzrlib.merge.Merger object to create a per file "
61
"merge object when starting a merge. "
62
"Should return either None or a subclass of "
63
"``bzrlib.merge.AbstractPerFileMerger``. "
64
"Such objects will then be called per file "
65
"that needs to be merged (including when one "
66
"side has deleted the file and the other has changed it). "
67
"See the AbstractPerFileMerger API docs for details on how it is "
72
class AbstractPerFileMerger(object):
73
"""PerFileMerger objects are used by plugins extending merge for bzrlib.
75
See ``bzrlib.plugins.news_merge.news_merge`` for an example concrete class.
77
:ivar merger: The Merge3Merger performing the merge.
80
def __init__(self, merger):
81
"""Create a PerFileMerger for use with merger."""
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def merge_contents(self, merge_params):
85
"""Attempt to merge the contents of a single file.
87
:param merge_params: A bzrlib.merge.MergeHookParams
88
:return : A tuple of (status, chunks), where status is one of
89
'not_applicable', 'success', 'conflicted', or 'delete'. If status
90
is 'success' or 'conflicted', then chunks should be an iterable of
91
strings for the new file contents.
93
return ('not applicable', None)
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class ConfigurableFileMerger(AbstractPerFileMerger):
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"""Merge individual files when configured via a .conf file.
99
This is a base class for concrete custom file merging logic. Concrete
100
classes should implement ``merge_text``.
102
See ``bzrlib.plugins.news_merge.news_merge`` for an example concrete class.
104
:ivar affected_files: The configured file paths to merge.
106
:cvar name_prefix: The prefix to use when looking up configuration
107
details. <name_prefix>_merge_files describes the files targeted by the
110
:cvar default_files: The default file paths to merge when no configuration
117
def __init__(self, merger):
118
super(ConfigurableFileMerger, self).__init__(merger)
119
self.affected_files = None
120
self.default_files = self.__class__.default_files or []
121
self.name_prefix = self.__class__.name_prefix
122
if self.name_prefix is None:
123
raise ValueError("name_prefix must be set.")
125
def filename_matches_config(self, params):
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"""Check whether the file should call the merge hook.
128
<name_prefix>_merge_files configuration variable is a list of files
129
that should use the hook.
131
affected_files = self.affected_files
132
if affected_files is None:
133
config = self.merger.this_tree.branch.get_config()
134
# Until bzr provides a better policy for caching the config, we
135
# just add the part we're interested in to the params to avoid
136
# reading the config files repeatedly (bazaar.conf, location.conf,
138
config_key = self.name_prefix + '_merge_files'
139
affected_files = config.get_user_option_as_list(config_key)
140
if affected_files is None:
141
# If nothing was specified in the config, use the default.
142
affected_files = self.default_files
143
self.affected_files = affected_files
145
filename = self.merger.this_tree.id2path(params.file_id)
146
if filename in affected_files:
150
def merge_contents(self, params):
151
"""Merge the contents of a single file."""
152
# First, check whether this custom merge logic should be used. We
153
# expect most files should not be merged by this handler.
155
# OTHER is a straight winner, rely on default merge.
156
params.winner == 'other' or
157
# THIS and OTHER aren't both files.
158
not params.is_file_merge() or
159
# The filename isn't listed in the 'NAME_merge_files' config
161
not self.filename_matches_config(params)):
162
return 'not_applicable', None
163
return self.merge_text(params)
165
def merge_text(self, params):
166
"""Merge the byte contents of a single file.
168
This is called after checking that the merge should be performed in
169
merge_contents, and it should behave as per
170
``bzrlib.merge.AbstractPerFileMerger.merge_contents``.
172
raise NotImplementedError(self.merge_text)
71
175
class MergeHookParams(object):
72
176
"""Object holding parameters passed to merge_file_content hooks.
74
There are 3 fields hooks can access:
178
There are some fields hooks can access:
76
:ivar merger: the Merger object
77
180
:ivar file_id: the file ID of the file being merged
78
181
:ivar trans_id: the transform ID for the merge of this file
79
182
:ivar this_kind: kind of file_id in 'this' tree
added
removed
bzrlib/merge.py
