README: Use markdown alerts (#1276)

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Junegunn Choi 2024-03-15 21:22:16 +09:00 committed by GitHub
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@ -309,9 +309,42 @@ Plug 'junegunn/goyo.vim', { 'for': 'markdown' }
autocmd! User goyo.vim echom 'Goyo is now loaded!'
```
The `for` option is generally not needed as most plugins for specific file types
usually don't have too much code in the `plugin` directory. You might want to
examine the output of `vim --startuptime` before applying the option.
> [!NOTE]
> #### Should I set up on-demand loading?
>
> You probably don't need to.
>
> A properly implemented Vim plugin should already load lazily without any
> help from a plugin manager (`:help autoload`). So there are few cases where
> these options actually make much sense. Making a plugin load faster is
> the responsibility of the plugin developer, not the user. If you find
> a plugin that takes too long to load, consider opening an issue on the
> plugin's issue tracker.
>
> Let me give you a perspective. The time it takes to load a plugin is usually
> less than 2 or 3ms on modern computers. So unless you use a very large
> number of plugins, you are unlikely to save more than 50ms. If you have
> spent an hour carefully setting up the options to shave off 50ms, you
> will have to start Vim 72,000 times just to break even. You should ask
> yourself if that's a good investment of your time.
>
> Make sure that you're tackling the right problem by breaking down the
> startup of time of Vim using `--startuptime`.
>
> ```sh
> vim --startuptime /tmp/log
> ```
>
> On-demand loading should only be used as a last resort. It is basically
> a hacky workaround and is not always guaranteed to work.
> [!TIP]
> You can pass an empty list to `on` or `for` option to disable the loading
> of the plugin. You can manually load the plugin using `plug#load(NAMES...)`
> function.
>
> See https://github.com/junegunn/vim-plug/wiki/tips#loading-plugins-manually
### Post-update hooks
@ -356,21 +389,22 @@ A post-update hook is executed inside the directory of the plugin and only run
when the repository has changed, but you can force it to run unconditionally
with the bang-versions of the commands: `PlugInstall!` and `PlugUpdate!`.
Make sure to escape BARs and double-quotes when you write the `do` option
inline as they are mistakenly recognized as command separator or the start of
the trailing comment.
```vim
Plug 'junegunn/fzf', { 'do': 'yes \| ./install' }
```
But you can avoid the escaping if you extract the inline specification using a
variable (or any Vimscript expression) as follows:
```vim
let g:fzf_install = 'yes | ./install'
Plug 'junegunn/fzf', { 'do': g:fzf_install }
```
> [!TIP]
> Make sure to escape BARs and double-quotes when you write the `do` option
> inline as they are mistakenly recognized as command separator or the start of
> the trailing comment.
>
> ```vim
> Plug 'junegunn/fzf', { 'do': 'yes \| ./install' }
> ```
>
> But you can avoid the escaping if you extract the inline specification using a
> variable (or any Vimscript expression) as follows:
>
> ```vim
> let g:fzf_install = 'yes | ./install'
> Plug 'junegunn/fzf', { 'do': g:fzf_install }
> ```
### `PlugInstall!` and `PlugUpdate!`