88 lines
3.2 KiB
VimL
88 lines
3.2 KiB
VimL
" Copyright 2017 Google Inc. All rights reserved.
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"
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" Licensed under the Apache License, Version 2.0 (the "License");
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" you may not use this file except in compliance with the License.
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" You may obtain a copy of the License at
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"
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" http://www.apache.org/licenses/LICENSE-2.0
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"
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" Unless required by applicable law or agreed to in writing, software
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" distributed under the License is distributed on an "AS IS" BASIS,
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" WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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" See the License for the specific language governing permissions and
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" limitations under the License.
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let s:plugin = maktaba#plugin#Get('codefmt')
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""
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" @private
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" Formatter for gn, a chromium build tool.
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" Formatter: gn
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function! codefmt#gn#GetFormatter() abort
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let l:url = 'https://www.chromium.org/developers/how-tos/install-depot-tools'
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let l:formatter = {
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\ 'name': 'gn',
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\ 'setup_instructions': 'install Chromium depot_tools (' . l:url . ')'}
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function l:formatter.IsAvailable() abort
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return executable(s:plugin.Flag('gn_executable'))
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endfunction
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function l:formatter.AppliesToBuffer() abort
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return &filetype is# 'gn'
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endfunction
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""
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" Run `gn format` to format the whole file.
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"
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" We implement Format(), and not FormatRange{,s}(), because gn doesn't
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" provide a hook for formatting a range, and all gn files are supposed
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" to be fully formatted anyway.
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function l:formatter.Format() abort
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let l:executable = s:plugin.Flag('gn_executable')
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let l:cmd = [ l:executable, 'format', '--stdin' ]
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let l:input = join(getline(1, line('$')), "\n")
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" gn itself prints errors to stdout, but if the error comes from the
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" gn.py wrapper script, it is printed to stderr. Use stdout as the
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" error message if stderr is empty.
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let l:result = maktaba#syscall#Create(l:cmd).WithStdin(l:input).Call(0)
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if !empty(l:result.stdout)
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let l:output = l:result.stdout
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else
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let l:output = l:result.stderr
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endif
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" Other formatters generally catch failure as an exception, but
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" v:exception contains stderr in that case, and gn prints errors to
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" stdout, so we need to check for a shell error ourselves.
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if !v:shell_error
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let l:formatted = split(l:output, "\n")
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call maktaba#buffer#Overwrite(1, line('$'), l:formatted)
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else
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let l:errors = []
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for line in split(l:output, "\n")
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let l:tokens = matchlist(line, '\C\v^ERROR at :(\d+):(\d+):\s*(.*)')
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if !empty(l:tokens)
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call add(l:errors, {
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\ "filename": @%,
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\ "lnum": l:tokens[1],
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\ "col": l:tokens[2],
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\ "text": l:tokens[3]})
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endif
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endfor
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if empty(l:errors)
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" Couldn't parse errors; display the whole error message.
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call maktaba#error#Shout('Error formatting file: %s', l:output)
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else
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call setqflist(l:errors, 'r')
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cc 1
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endif
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endif
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endfunction
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return l:formatter
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endfunction
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