205 lines
6.3 KiB
Markdown
205 lines
6.3 KiB
Markdown
vim-flake8
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==========
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`vim-flake8` is a Vim plugin that runs the currently open file through Flake8,
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a static syntax and style checker for Python source code. It supersedes both
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[vim-pyflakes](https://github.com/nvie/vim-pyflakes) and
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[vim-pep8](https://github.com/nvie/vim-pep8).
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[Flake8](https://pypi.python.org/pypi/flake8/) is a wrapper around PyFlakes
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(static syntax checker), PEP8 (style checker) and Ned's MacCabe script
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(complexity checker).
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Installation
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------------
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Make sure you've installed the
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[flake8](https://pypi.python.org/pypi/flake8/) package.
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If you use vim >= 8, install this plugin with:
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```
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mkdir -p ~/.vim/pack/flake8/start/
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cd ~/.vim/pack/flake8/start/
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git clone https://github.com/nvie/vim-flake8.git
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```
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Otherwise, install [vim-pathogen](https://github.com/tpope/vim-pathogen)
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if you're not using it already. Then, simply put the
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contents of this repository in your `~/.vim/bundle` directory.
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Usage
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-----
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1. Open a Python file
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2. Press `<F7>` to run `flake8` on it
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It shows the errors inside a quickfix window, which will allow your to quickly
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jump to the error locations by simply pressing [Enter].
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If any of `g:flake8_show_in_gutter` or `g:flake8_show_in_file` are set to `1`, call:
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call flake8#Flake8UnplaceMarkers()
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To remove all markers. No default mapping is provided.
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Customization
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-------------
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If you don't want to use the `<F7>` key for flake8-checking, simply remap it to
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another key. It autodetects whether it has been remapped and won't register
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the `<F7>` key if so. For example, to remap it to `<F3>` instead, use:
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autocmd FileType python map <buffer> <F3> :call flake8#Flake8()<CR>
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Since the `autocmd` order is not specified in Vim, the previous
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recommendation is sometimes not sufficient to "unmap" `<F7>`. In such a
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case, being more explicit about it should help (see `:h no_mail_maps`):
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let g:no_flake8_maps = 1
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For flake8 configuration options please consult the following page:
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http://flake8.pycqa.org/en/latest/user/configuration.html
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To customize the location of your flake8 binary, set `g:flake8_cmd`:
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let g:flake8_cmd="/opt/strangebin/flake8000"
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To customize the location of quick fix window, set `g:flake8_quickfix_location`:
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let g:flake8_quickfix_location="topleft"
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To customize the height of quick fix window, set `g:flake8_quickfix_height`:
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let g:flake8_quickfix_height=7
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To customize whether the quickfix window opens, set `g:flake8_show_quickfix`:
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let g:flake8_show_quickfix=0 " don't show
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let g:flake8_show_quickfix=1 " show (default)
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To customize whether the show signs in the gutter, set `g:flake8_show_in_gutter`:
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let g:flake8_show_in_gutter=0 " don't show (default)
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let g:flake8_show_in_gutter=1 " show
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To customize whether the show marks in the file, set `g:flake8_show_in_file`:
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let g:flake8_show_in_file=0 " don't show (default)
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let g:flake8_show_in_file=1 " show
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To customize the number of marks to show, set `g:flake8_max_markers`:
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let g:flake8_max_markers=500 " (default)
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To customize the gutter markers, set any of `flake8_error_marker`, `flake8_warning_marker`,
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`flake8_pyflake_marker`, `flake8_complexity_marker`, `flake8_naming_marker`. Setting one to
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the empty string disables it. Ex.:
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let g:flake8_error_marker='EE' " set error marker to 'EE'
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let g:flake8_warning_marker='WW' " set warning marker to 'WW'
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let g:flake8_pyflake_marker='' " disable PyFlakes warnings
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let g:flake8_complexity_marker='' " disable McCabe complexity warnings
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let g:flake8_naming_marker='' " disable naming warnings
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To customize the colors used for markers, define the highlight groups, `Flake8_Error`,
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`Flake8_Warning`, `Flake8_PyFlake`, `Flake8_Complexity`, `Flake8_Naming`:
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" to use colors defined in the colorscheme
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highlight link Flake8_Error Error
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highlight link Flake8_Warning WarningMsg
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highlight link Flake8_Complexity WarningMsg
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highlight link Flake8_Naming WarningMsg
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highlight link Flake8_PyFlake WarningMsg
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To show the error message of the current line in the ruler, call `flake8#ShowError()`:
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" add binding to call the function
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nnoremap <C-K> :call flake8#Flake8ShowError()<cr>
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Tips
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----
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A tip might be to run the Flake8 check every time you write a Python file, to
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enable this, add the following line to your `.vimrc` file (thanks
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[Godefroid](https://github.com/gotcha)!):
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autocmd BufWritePost *.py call flake8#Flake8()
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This plugin goes well together with the following plugin:
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- [PyUnit](https://github.com/nvie/vim-pyunit) (unit test helper under `<F8>`
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and `<F9>`)
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Max line lengths
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----------------
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One particular customization a lot of people like to make is relaxing the
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maximum line length default. This is a config setting that should be set in
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flake8 itself. (vim-flake8 "just" invokes it and deals with showing the output
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in Vim's quickfix window.)
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To do so, put the following into a `.flake8` file at the root of your project:
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[flake8]
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max-line-length = 120
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History
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-------
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1.6: Deprecated configuring flake8 options through Vim settings. Instead,
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advise users to use a `.flake8` config file in the root of your project.
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- Decprecated options:
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- `g:flake8_builtins`
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- `g:flake8_ignore`
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- `g:flake8_max_line_length`
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- `g:flake8_max_complexity`
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- New options:
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- `g:flake8_quickfix_height`
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1.5: Added markers and the option to don't show the quickfix window, also split
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functions into a autoload file. Added:
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- Options:
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- `g:flake8_show_quickfix`
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- `g:flake8_show_in_gutter`
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- `g:flake8_show_in_file`
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- `g:flake8_max_markers`
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- `flake8_error_marker`
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- `flake8_warning_marker`
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- `flake8_pyflake_marker`
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- `flake8_complexity_marker`
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- `flake8_naming_marker`
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- Functions:
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- `flake8#Flake8UnplaceMarkers()`
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- `flake8#Flake8()`
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- Highlighting:
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- `Flake8_Error`
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- `Flake8_Warning`
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- `Flake8_Complexity`
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- `Flake8_Naming`
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- `Flake8_PyFlake`
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1.4: Suppress output to stdout.
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1.3: Added the following options:
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- `g:flake8_builtins="_,apply"`
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- `g:flake8_max_complexity=10`
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1.2: Added the following options:
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- `g:flake8_cmd="/opt/strangebin/flake8000"`
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- `g:flake8_max_line_length=120`
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- `g:flake8_ignore="E501,W293"`
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1.1: Added `g:flake8_ignore` option.
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1.0: Initial version.
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License
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-------
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Liberally licensed under BSD terms.
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