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Merge pull request #81 from skvrahul/master
[etc/vim.git] / README.mdown
index fcfbab2407cc85d2edf985c7f1ea3f9b70624e8c..338e44503c67ebb33d893fc76abe9803c680570c 100644 (file)
@@ -1,11 +1,31 @@
-vim-flake8 ![Project status](http://stillmaintained.com/nvie/vim-flake8.png)
+vim-flake8
 ==========
+`vim-flake8` is a Vim plugin that runs the currently open file through Flake8,
+a static syntax and style checker for Python source code.  It supersedes both
+[vim-pyflakes](https://github.com/nvie/vim-pyflakes) and
+[vim-pep8](https://github.com/nvie/vim-pep8).
+
+[Flake8](https://pypi.python.org/pypi/flake8/) is a wrapper around PyFlakes
+(static syntax checker), PEP8 (style checker) and Ned's MacCabe script
+(complexity checker).
+
 
 Installation
 ------------
-Use [vim-pathogen](https://github.com/tpope/vim-pathogen) if you're not using
-it already.  Then, simply put the contents of this repository in your
-`~/.vim/bundle` directory.
+
+Make sure you've installed the
+[flake8](https://pypi.python.org/pypi/flake8/) package.
+
+If you use vim >= 8, install this plugin with:
+```
+mkdir -p ~/.vim/pack/flake8/start/
+cd ~/.vim/pack/flake8/start/
+git clone https://github.com/nvie/vim-flake8.git
+```
+
+Otherwise, install [vim-pathogen](https://github.com/tpope/vim-pathogen)
+if you're not using it already. Then, simply put the
+contents of this repository in your `~/.vim/bundle` directory.
 
 Usage
 -----
@@ -15,6 +35,11 @@ Usage
 It shows the errors inside a quickfix window, which will allow your to quickly
 jump to the error locations by simply pressing [Enter].
 
+If any of `g:flake8_show_in_gutter` or `g:flake8_show_in_file` are set to `1`, call:
+
+    call flake8#Flake8UnplaceMarkers()
+
+To remove all markers. No default mapping is provided.
 
 Customization
 -------------
@@ -22,19 +47,153 @@ If you don't want to use the `<F7>` key for flake8-checking, simply remap it to
 another key.  It autodetects whether it has been remapped and won't register
 the `<F7>` key if so.  For example, to remap it to `<F3>` instead, use:
 
-    autocmd FileType python map <buffer> <F3> :call Flake8()<CR>
+    autocmd FileType python map <buffer> <F3> :call flake8#Flake8()<CR>
+
+For flake8 configuration options please consult the following page:
+
+http://flake8.pycqa.org/en/latest/user/configuration.html
+
+To customize the location of your flake8 binary, set `g:flake8_cmd`:
+
+    let g:flake8_cmd="/opt/strangebin/flake8000"
+
+To customize the location of quick fix window, set `g:flake8_quickfix_location`:
+
+    let g:flake8_quickfix_location="topleft"
+
+To customize the height of quick fix window, set `g:flake8_quickfix_height`:
+
+    let g:flake8_quickfix_height=7
+
+To customize whether the quickfix window opens, set `g:flake8_show_quickfix`:
+
+    let g:flake8_show_quickfix=0  " don't show
+    let g:flake8_show_quickfix=1  " show (default)
+
+To customize whether the show signs in the gutter, set `g:flake8_show_in_gutter`:
+
+    let g:flake8_show_in_gutter=0  " don't show (default)
+    let g:flake8_show_in_gutter=1  " show
+
+To customize whether the show marks in the file, set `g:flake8_show_in_file`:
+
+    let g:flake8_show_in_file=0  " don't show (default)
+    let g:flake8_show_in_file=1  " show
+
+To customize the number of marks to show, set `g:flake8_max_markers`:
+
+    let g:flake8_max_markers=500  " (default)
+
+To customize the gutter markers, set any of `flake8_error_marker`, `flake8_warning_marker`,
+`flake8_pyflake_marker`, `flake8_complexity_marker`, `flake8_naming_marker`. Setting one to
+the empty string disables it. Ex.:
+
+    flake8_error_marker='EE'     " set error marker to 'EE'
+    flake8_warning_marker='WW'   " set warning marker to 'WW'
+    flake8_pyflake_marker=''     " disable PyFlakes warnings
+    flake8_complexity_marker=''  " disable McCabe complexity warnings
+    flake8_naming_marker=''      " disable naming warnings
 
+To customize the colors used for markers, define the highlight groups, `Flake8_Error`,
+`Flake8_Warning`, `Flake8_PyFlake`, `Flake8_Complexity`, `Flake8_Naming`:
+
+    " to use colors defined in the colorscheme
+    highlight link Flake8_Error      Error
+    highlight link Flake8_Warning    WarningMsg
+    highlight link Flake8_Complexity WarningMsg
+    highlight link Flake8_Naming     WarningMsg
+    highlight link Flake8_PyFlake    WarningMsg
+
+To show the error message of the current line in the ruler, call `flake8#ShowError()`:
+
+    " add binding to call the function
+    nnoremap <C-K> :call flake8#Flake8ShowError()<cr>
+    
 
 Tips
 ----
 A tip might be to run the Flake8 check every time you write a Python file, to
 enable this, add the following line to your `.vimrc` file (thanks
-[Godefroid](http://github.com/gotcha)!):
-
-    autocmd BufWritePost *.py call Flake8()
+[Godefroid](https://github.com/gotcha)!):
 
+    autocmd BufWritePost *.py call flake8#Flake8()
 
 This plugin goes well together with the following plugin:
 
-- [PyUnit](http://github.com/nvie/vim-pyunit) (unit test helper under `<F8>`
+- [PyUnit](https://github.com/nvie/vim-pyunit) (unit test helper under `<F8>`
   and `<F9>`)
+
+
+Max line lengths
+----------------
+
+One particular customization a lot of people like to make is relaxing the
+maximum line length default.  This is a config setting that should be set in
+flake8 itself. (vim-flake8 "just" invokes it and deals with showing the output
+in Vim's quickfix window.)
+
+To do so, put the following into your `~/.config/flake8` file:
+
+    [flake8]
+    max-line-length = 120
+
+
+History
+-------
+1.6: Deprecated configuring flake8 options through Vim settings.  Instead,
+advise users to use the `~/.config/flake8` config file.
+
+    - Decprecated options:
+      - `g:flake8_builtins`
+      - `g:flake8_ignore`
+      - `g:flake8_max_line_length`
+      - `g:flake8_max_complexity`
+
+    - New options:
+      - `g:flake8_quickfix_height`
+
+1.5: Added markers and the option to don't show the quickfix window, also split
+functions into a autoload file. Added:
+
+    - Options:
+      - `g:flake8_show_quickfix`
+      - `g:flake8_show_in_gutter`
+      - `g:flake8_show_in_file`
+      - `g:flake8_max_markers`
+      - `flake8_error_marker`
+      - `flake8_warning_marker`
+      - `flake8_pyflake_marker`
+      - `flake8_complexity_marker`
+      - `flake8_naming_marker`
+    - Functions:
+      - `flake8#Flake8UnplaceMarkers()`
+      - `flake8#Flake8()`
+    - Highlighting:
+      - `Flake8_Error`
+      - `Flake8_Warning`
+      - `Flake8_Complexity`
+      - `Flake8_Naming`
+      - `Flake8_PyFlake`
+
+1.4: Suppress output to stdout.
+
+1.3: Added the following options:
+
+    - `g:flake8_builtins="_,apply"`
+    - `g:flake8_max_complexity=10`
+
+1.2: Added the following options:
+
+    - `g:flake8_cmd="/opt/strangebin/flake8000"`
+    - `g:flake8_max_line_length=120`
+    - `g:flake8_ignore="E501,W293"`
+
+1.1: Added `g:flake8_ignore` option.
+
+1.0: Initial version.
+
+
+License
+-------
+
+Liberally licensed under BSD terms.