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60 lines
2.1 KiB
Python
60 lines
2.1 KiB
Python
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# Copyright 2014 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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#
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# Based on clang-format.py.
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#
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# This file is a minimal gn format vim-integration. To install:
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# - Change 'binary' if gn is not on the path (see below).
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# - Add to your .vimrc:
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#
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# map <F1> :pyf <path-to-this-file>/gn-format.py<CR>
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#
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# gn format currently formats only a complete file so visual ranges, etc. won't
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# be used. It operates on the current, potentially unsaved buffer and does not
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# create or save any files. To revert a formatting, just undo.
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import difflib
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import subprocess
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import sys
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import vim
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# Change this to the full path if gn is not on the path.
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binary = 'gn'
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def main():
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# Get the current text.
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buf = vim.current.buffer
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text = '\n'.join(buf)
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is_win = sys.platform.startswith('win32')
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# Avoid flashing an ugly cmd prompt on Windows when invoking gn.
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startupinfo = None
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if is_win:
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startupinfo = subprocess.STARTUPINFO()
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startupinfo.dwFlags |= subprocess.STARTF_USESHOWWINDOW
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startupinfo.wShowWindow = subprocess.SW_HIDE
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# Call formatter. Needs shell=True on Windows due to gn.bat in depot_tools.
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p = subprocess.Popen([binary, 'format', '--stdin'],
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stdout=subprocess.PIPE, stderr=subprocess.PIPE,
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stdin=subprocess.PIPE, startupinfo=startupinfo,
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shell=is_win, universal_newlines=True)
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stdout, stderr = p.communicate(input=text)
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if p.returncode != 0:
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print 'Formatting failed, please report to gn-dev@chromium.org.'
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print stdout, stderr
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else:
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# Otherwise, replace current buffer.
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lines = stdout.split('\n')
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# Last line should have trailing \n, but we don't want to insert a blank
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# line at the end of the buffer, so remove that.
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if lines[-1] == '':
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lines = lines[:-1]
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sequence = difflib.SequenceMatcher(None, vim.current.buffer, lines)
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for op in reversed(sequence.get_opcodes()):
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if op[0] is not 'equal':
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vim.current.buffer[op[1]:op[2]] = lines[op[3]:op[4]]
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main()
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