documentation: update the README

- Simplifies the README.
- Adds a requirements.txt with python depedencies for the virtualenv.
- Removes mentions of unused plugins and unnecessary depedencies.

Co-Authored-by: iGor milhit <igor.milhit@unige.ch>

README.md

@@ -4,89 +4,60 @@ I'm trying to document my neovim setup. Mostly, I'm using neovim to edit
 markdown, HTML, CSS/SCSS and python files.
 
 I'm using `vim-plug` as a plugin manager. To install and activate `vim-plug`
-see the [documentation][1].
-
-I'm using the [nord color scheme][5].
+see the [documentation][7].
 
 ## To do
 
 - [x] Document how to use `pyenv` to provide a python engine.
-- [ ] Identify the python package dependencies.
-  - `jedi`.
-  - `jedi-language-server`.
-  - `flake8`.
-  - `neovim`.
-  - `pycodestyle`.
-  - `pyflakes`.
-  - `pynvim`.
+- [x] Identify the python package dependencies.
 
 ## Requirements
 
 1. `neovim`
 1. `git`
+1. A python virtualenv with python dependencies installed. (see [pyenv
+   section][10]).
 1. `nodejs`, `yarn`
 1. [vim-plug][1]
 1. [ripgrep][2]
 1. [The Silver Searcher (`ag`)][3]
-1. `grammalecte`, the python standalone program.
-1. All or any of these python linters: `pep8`, `flake8`, `pycodestyle`,
-   `pyflakes`.
-1. `scss_lint` (ruby), for SCSS lint.
 1. A [font patched for nerds][8].
 
 ## Installation
 
-1. Clone the repository.
-1. Create a symlink.
-1. Check [the requirements][4].
-    - [Install `vim-plug`][7].
+1. Check [the requirements][4]. ⬆
+1. Clone the repository \
+   `git clone <URL>`
+1. Create a symlink: \
+   `ln /path/neovim/init.vim /home/user/.config/nvim/init.vim`.
+1. [Install `vim-plug`][7].
 1. Start `neovim`.
 1. Install the plugins (`:PlugInstall`).
 
-``` bash
-git clone <URL>
-ln -s neovim .config/neovim
-nvim
-:PlugInstall
-```
+## Create a virtualenv with pyenv
 
-## External configuration
-
-In order to improve the `fzf` preview window display, it's possible to
-configure it through the following `env` variable:
-
-```bash
-export FZF_DEFAULT_OPTS="--preview='bat --style=numbers --color=always --line-range :500 {}' \
-                         --border \
-                         --color 'border:#4c566a,info:#4c566a,pointer:#88c0d0,prompt:#5e81ac,bg+:#3b4252,hl:#a3be8c'"
-```
-
-See the `fzf` documentation: <https://github.com/junegunn/fzf#preview-window>
-
-## Provide an virtual environment for python engine
-
-Benefit: having a separate virtual environment for your editor than the one
-your working into.
+Benefit: having a separate virtual environment for the python engine than the
+one your working into.
 
 Install `pyenv` with the [`pyenv-installer`][9].
 
 Install the python version you need with `pyenv`:
 
 ```bash
-pyenv install 3.9.9
+pyenv install <python version> 
 ```
 
 Create and name the virtual environment for neovim:
 
 ```bash
-pyenv virtualenv 3.9.9 neovim
+pyenv virtualenv <python version> neovim
 ```
 
 Activate the virtual environment and fetch the python path:
 
 ```bash
 pyenv activate neovim
-pyenv which python      #Note the provided path
+pyenv which python      # Note the provided path
 ```
 
 Add the following line to your `init.vim`:
@@ -98,7 +69,7 @@ let g:python3_host_prog = '/full/path/to/neovim/bin/python
 Install the python dependencies in the virtual environment as it is activated:
 
 ```bash
-pip install neovim pynvim …
+pip install -r requirements.txt 
 ```
 
 To deactivate the virtual environment:
@@ -115,3 +86,4 @@ pyenv deactivate
 [7]: https://github.com/junegunn/vim-plug#installation
 [8]: https://www.github.com/ryanoasis/nerd-fonts
 [9]: https://github.com/pyenv/pyenv-installer
+[10]: #create-a-virtualenv-with-pyenv

init.vim

@@ -27,7 +27,6 @@ Plug 'tpope/vim-fugitive'                                                   " Gi
 Plug 'Xuyuanp/nerdtree-git-plugin'                                          " To see new or modified files in the nerdtree window
 Plug 'https://github.com/editorconfig/editorconfig-vim'                     " Support of '.editorconfig' files
 Plug 'shmargum/vim-sass-colors'                                             " Highlight sass/scss/less/css colors and color variables
-Plug 'vim-syntastic/syntastic'                                              " Syntax checking (linting)
 " Auto completion
 Plug 'neoclide/coc.nvim', {'branch': 'release'}
 Plug 'pappasam/coc-jedi', { 'do': 'yarn install --frozen-lockfile && yarn build' }      "Python, using jedi
@@ -118,6 +117,8 @@ au FileType json set shiftwidth=2
 autocmd FileType html set tabstop=2
 autocmd FileType html set softtabstop=2
 autocmd FileType html set shiftwidth=2
+au FileType xml setlocal foldmethod=indent
+autocmd FileType xml set foldlevel=2
 
 " XML 
 let g:xml_syntax_folding=3
@@ -154,24 +155,6 @@ nnoremap <C-h> :call pandoc#formatting#UseHardWraps()
 nnoremap <C-t> :call pandoc#formatting#ToggleAutoformat()
 let g:mkdp_filetypes = ['markdown', 'pandoc', 'pandoc.markdown']
 
-" #########################################
-" #########################################
-" Linters (syntastic configuration)
-"
-" SCSS linter
-let g:syntastic_scss_checkers = ['scss_lint']
-
-" Python linters. I define this list mainly to avoid pylint which I can't
-" manage to use correctly and is required on my main OS.
-let g:syntastic_python_checkers=['flake8', 'pep8', 'pycodestyle', 'pyflakes']
-
-" Copy pasting of the basic configuration recommended by syntastic
-" https://github.com/vim-syntastic/syntastic#settings
-" but without the statusline settings to improve comptability with airline.
-let g:syntastic_always_populate_loc_list = 1
-let g:syntastic_auto_loc_list = 1
-let g:syntastic_check_on_open = 1
-
 " #########################################
 " #########################################
 " autocompletion, mainly coc configuration

requirements.txt

@@ -0,0 +1,22 @@
+certifi
+charset-normalizer
+docstring-to-markdown
+flake8
+greenlet
+idna
+jedi
+jedi-language-server
+mccabe
+msgpack
+neovim
+parso
+pycodestyle
+pydantic
+pyflakes
+pygls
+pygrammalecte
+pynvim
+requests
+typeguard
+typing_extensions
+urllib3