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" pyflakes.vim - A script to highlight Python code on the fly with warnings
" from Pyflakes, a Python lint tool.
"
" Place this script and the accompanying pyflakes directory in
" .vim/ftplugin/python.
"
" See README for additional installation and information.
"
" Thanks to matlib.vim for ideas/code on interactive linting.
"
" Maintainer: Kevin Watters <kevin.watters@gmail.com>
" Version: 0.1
if exists("b:did_pyflakes_plugin")
finish " only load once
else
let b:did_pyflakes_plugin = 1
endif
if !exists('g:pyflakes_builtins')
let g:pyflakes_builtins = []
endif
if !exists("b:did_python_init")
python << EOF
import vim
import os.path
import sys
# get the directory this script is in: the pyflakes python module should be installed there.
scriptdir = os.path.join(os.path.dirname(vim.eval('expand("<sfile>")')), 'pyflakes')
sys.path.insert(0, scriptdir)
from pyflakes import checker, ast, messages
from operator import attrgetter
class SyntaxError(messages.Message):
message = 'could not compile: %s'
def __init__(self, filename, lineno, col, message):
messages.Message.__init__(self, filename, lineno, col)
self.message_args = (message,)
class blackhole(object):
write = flush = lambda *a, **k: None
def check(buffer):
filename = buffer.name
contents = '\n'.join(buffer[:])
builtins = []
try:
builtins = eval(vim.eval('string(g:pyflakes_builtins)'))
except Exception:
pass
try:
# TODO: use warnings filters instead of ignoring stderr
old_stderr, sys.stderr = sys.stderr, blackhole()
try:
tree = ast.parse(contents, filename)
finally:
sys.stderr = old_stderr
except:
try:
value = sys.exc_info()[1]
lineno, offset, line = value[1][1:]
except IndexError:
lineno, offset, line = 1, 0, ''
if line.endswith("\n"):
line = line[:-1]
return [SyntaxError(filename, lineno, offset, str(value))]
else:
w = checker.Checker(tree, filename, builtins = builtins)
w.messages.sort(key = attrgetter('lineno'))
return w.messages
def vim_quote(s):
return s.replace("'", "''")
EOF
let b:did_python_init = 1
endif
au BufLeave <buffer> call s:ClearPyflakes()
au BufEnter <buffer> call s:RunPyflakes()
au InsertLeave <buffer> call s:RunPyflakes()
au InsertEnter <buffer> call s:RunPyflakes()
au BufWritePost <buffer> call s:RunPyflakes()
au CursorHold <buffer> call s:RunPyflakes()
au CursorHoldI <buffer> call s:RunPyflakes()
au CursorHold <buffer> call s:GetPyflakesMessage()
au CursorMoved <buffer> call s:GetPyflakesMessage()
if !exists("*s:PyflakesUpdate")
function s:PyflakesUpdate()
silent call s:RunPyflakes()
call s:GetPyflakesMessage()
endfunction
endif
" Call this function in your .vimrc to update PyFlakes
if !exists(":PyflakesUpdate")
command PyflakesUpdate :call s:PyflakesUpdate()
endif
" Hook common text manipulation commands to update PyFlakes
" TODO: is there a more general "text op" autocommand we could register
" for here?
noremap <buffer><silent> dd dd:PyflakesUpdate<CR>
noremap <buffer><silent> dw dw:PyflakesUpdate<CR>
noremap <buffer><silent> u u:PyflakesUpdate<CR>
noremap <buffer><silent> <C-R> <C-R>:PyflakesUpdate<CR>
" WideMsg() prints [long] message up to (&columns-1) length
" guaranteed without "Press Enter" prompt.
if !exists("*s:WideMsg")
function s:WideMsg(msg)
let x=&ruler | let y=&showcmd
set noruler noshowcmd
redraw
echo a:msg
let &ruler=x | let &showcmd=y
endfun
endif
if !exists("*s:RunPyflakes")
function s:RunPyflakes()
highlight link PyFlakes SpellBad
if exists("b:cleared")
if b:cleared == 0
silent call s:ClearPyflakes()
let b:cleared = 1
endif
else
let b:cleared = 1
endif
let b:matched = []
let b:matchedlines = {}
python << EOF
for w in check(vim.current.buffer):
vim.command('let s:matchDict = {}')
vim.command("let s:matchDict['lineNum'] = " + str(w.lineno))
vim.command("let s:matchDict['message'] = '%s'" % vim_quote(w.message % w.message_args))
vim.command("let b:matchedlines[" + str(w.lineno) + "] = s:matchDict")
if w.col is None or isinstance(w, SyntaxError):
# without column information, just highlight the whole line
# (minus the newline)
vim.command(r"let s:mID = matchadd('PyFlakes', '\%" + str(w.lineno) + r"l\n\@!')")
else:
# with a column number, highlight the first keyword there
vim.command(r"let s:mID = matchadd('PyFlakes', '^\%" + str(w.lineno) + r"l\_.\{-}\zs\k\+\k\@!\%>" + str(w.col) + r"c')")
vim.command("call add(b:matched, s:matchDict)")
EOF
let b:cleared = 0
endfunction
end
" keep track of whether or not we are showing a message
let b:showing_message = 0
if !exists("*s:GetPyflakesMessage")
function s:GetPyflakesMessage()
let s:cursorPos = getpos(".")
" Bail if RunPyflakes hasn't been called yet.
if !exists('b:matchedlines')
return
endif
" if there's a message for the line the cursor is currently on, echo
" it to the console
if has_key(b:matchedlines, s:cursorPos[1])
let s:pyflakesMatch = get(b:matchedlines, s:cursorPos[1])
call s:WideMsg(s:pyflakesMatch['message'])
let b:showing_message = 1
return
endif
" otherwise, if we're showing a message, clear it
if b:showing_message == 1
echo
let b:showing_message = 0
endif
endfunction
endif
if !exists('*s:ClearPyflakes')
function s:ClearPyflakes()
let s:matches = getmatches()
for s:matchId in s:matches
if s:matchId['group'] == 'PyFlakes'
call matchdelete(s:matchId['id'])
endif
endfor
let b:matched = []
let b:matchedlines = {}
let b:cleared = 1
endfunction
endif
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