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Merge branch 'master' into tabac-master
[etc/vim.git] / README.mdown
1 vim-flake8
2 ==========
3 `vim-flake8` is a Vim plugin that runs the currently open file through Flake8,
4 a static syntax and style checker for Python source code.  It supersedes both
5 [vim-pyflakes](https://github.com/nvie/vim-pyflakes) and
6 [vim-pep8](https://github.com/nvie/vim-pep8).
7
8 [Flake8](https://pypi.python.org/pypi/flake8/) is a wrapper around PyFlakes
9 (static syntax checker), PEP8 (style checker) and Ned's MacCabe script
10 (complexity checker).
11
12
13 Installation
14 ------------
15 Use [vim-pathogen](https://github.com/tpope/vim-pathogen) if you're not using
16 it already.  Make sure you've installed the
17 [flake8](https://pypi.python.org/pypi/flake8/) package.  Then, simply put the
18 contents of this repository in your `~/.vim/bundle` directory.
19
20 Usage
21 -----
22 1. Open a Python file
23 2. Press `<F7>` to run `flake8` on it
24
25 It shows the errors inside a quickfix window, which will allow your to quickly
26 jump to the error locations by simply pressing [Enter].
27
28 If any of `g:flake8_show_in_gutter` or `g:flake8_show_in_file` are set to `1`, call:
29
30     call flake8#Flake8UnplaceMarkers()
31
32 To remove all markers. No default mapping is provided.
33
34 Customization
35 -------------
36 If you don't want to use the `<F7>` key for flake8-checking, simply remap it to
37 another key.  It autodetects whether it has been remapped and won't register
38 the `<F7>` key if so.  For example, to remap it to `<F3>` instead, use:
39
40     autocmd FileType python map <buffer> <F3> :call Flake8()<CR>
41
42 For flake8 configuration options please consult the following page:
43
44 https://flake8.readthedocs.org/en/latest/config.html
45
46 To customize the location of your flake8 binary, set `g:flake8_cmd`:
47
48     let g:flake8_cmd="/opt/strangebin/flake8000"
49
50 To customize the location of quick fix window, set `g:flake8_quickfix_location`:
51
52     let g:flake8_quickfix_location="topleft"
53
54 To customize the height of quick fix window, set `g:flake8_quickfix_height`:
55
56     let g:flake8_quickfix_height=7
57
58 To customize whether the quickfix window opens, set `g:flake8_show_quickfix`:
59
60     let g:flake8_show_quickfix=0  " don't show
61     let g:flake8_show_quickfix=1  " show (default)
62
63 To customize whether the show signs in the gutter, set `g:flake8_show_in_gutter`:
64
65     let g:flake8_show_in_gutter=0  " don't show (default)
66     let g:flake8_show_in_gutter=1  " show
67
68 To customize whether the show marks in the file, set `g:flake8_show_in_file`:
69
70     let g:flake8_show_in_file=0  " don't show (default)
71     let g:flake8_show_in_file=1  " show
72
73 To customize the number of marks to show, set `g:flake8_max_markers`:
74
75     let g:flake8_max_markers=500  " (default)
76
77 To customize the gutter markers, set any of `flake8_error_marker`, `flake8_warning_marker`,
78 `flake8_pyflake_marker`, `flake8_complexity_marker`, `flake8_naming_marker`. Setting one to
79 the empty string disables it. Ex.:
80
81     flake8_error_marker='EE'     " set error marker to 'EE'
82     flake8_warning_marker='WW'   " set warning marker to 'WW'
83     flake8_pyflake_marker=''     " disable PyFlakes warnings
84     flake8_complexity_marker=''  " disable McCabe complexity warnings
85     flake8_naming_marker=''      " disable naming warnings
86
87 To customize the colors used for markers, define the highlight groups, `Flake8_Error`,
88 `Flake8_Warning`, `Flake8_PyFlake`, `Flake8_Complexity`, `Flake8_Naming`:
89
90     " to use colors defined in the colorscheme
91     highlight link Flake8_Error      Error
92     highlight link Flake8_Warning    WarningMsg
93     highlight link Flake8_Complexity WarningMsg
94     highlight link Flake8_Naming     WarningMsg
95     highlight link Flake8_PyFlake    WarningMsg
96
97 Tips
98 ----
99 A tip might be to run the Flake8 check every time you write a Python file, to
100 enable this, add the following line to your `.vimrc` file (thanks
101 [Godefroid](https://github.com/gotcha)!):
102
103     autocmd BufWritePost *.py call Flake8()
104
105 This plugin goes well together with the following plugin:
106
107 - [PyUnit](https://github.com/nvie/vim-pyunit) (unit test helper under `<F8>`
108   and `<F9>`)
109
110
111 History
112 -------
113 1.6: Deprecated configuring flake8 options through Vim settings.  Instead,
114 advise users to use the flake8 config file.
115
116 1.5: Added markers and the option to don't show the quickfix window, also split
117 functions into a autoload file. Added:
118
119     - Options:
120       - `g:flake8_show_quickfix`
121       - `g:flake8_show_in_gutter`
122       - `g:flake8_show_in_file`
123       - `g:flake8_max_markers`
124       - `flake8_error_marker`
125       - `flake8_warning_marker`
126       - `flake8_pyflake_marker`
127       - `flake8_complexity_marker`
128       - `flake8_naming_marker`
129     - Functions:
130       - `flake8#Flake8UnplaceMarkers()`
131       - `flake8#Flake8()`
132     - Highlighting:
133       - `Flake8_Error`
134       - `Flake8_Warning`
135       - `Flake8_Complexity`
136       - `Flake8_Naming`
137       - `Flake8_PyFlake`
138
139 1.4: Suppress output to stdout.
140
141 1.3: Added the following options:
142
143     - `g:flake8_builtins="_,apply"`
144     - `g:flake8_max_complexity=10`
145
146 1.2: Added the following options:
147
148     - `g:flake8_cmd="/opt/strangebin/flake8000"`
149     - `g:flake8_max_line_length=120`
150     - `g:flake8_ignore="E501,W293"`
151
152 1.1: Added `g:flake8_ignore` option.
153
154 1.0: Initial version.
155
156
157 License
158 -------
159
160 Liberally licensed under BSD terms.