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def tree_ignores_add_patterns(tree, name_pattern_list):
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"""Retrieve a list of ignores from the ignore file in a tree.
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"""Add more ignore patterns to the ignore file in a tree.
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If ignore file does not exist then it will be created.
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The ignore file will be automatically added under version control.
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:param tree: Tree to retrieve the ignore list from.
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:param tree: Working tree to update the ignore list.
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:param name_pattern_list: List of ignore patterns.
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# read in the existing ignores set
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ifn = tree.abspath(bzrlib.IGNORE_FILENAME)
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if tree.has_filename(ifn):
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igns = f.read().decode('utf-8')
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file_contents = f.read()
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# figure out what kind of line endings are used
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newline = getattr(f, 'newlines', None)
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if type(newline) is tuple:
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elif newline is None:
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# TODO: If the file already uses crlf-style termination, maybe
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# we should use that for the newly added lines?
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if igns and igns[-1] != '\n':
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for name_pattern in name_pattern_list:
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igns += name_pattern + '\n'
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sio = StringIO(file_contents)
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ignores = parse_ignore_file(sio)
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# write out the updated ignores set
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f = atomicfile.AtomicFile(ifn, 'wb')
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f.write(igns.encode('utf-8'))
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# write the original contents, preserving original line endings
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f.write(newline.join(file_contents.split('\n')))
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if len(file_contents) > 0 and not file_contents.endswith('\n'):
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for pattern in name_pattern_list:
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if not pattern in ignores:
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f.write(pattern.encode('utf-8'))
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if not tree.path2id('.bzrignore'):
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tree.add(['.bzrignore'])
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if not tree.path2id(bzrlib.IGNORE_FILENAME):
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tree.add([bzrlib.IGNORE_FILENAME])