feat(nvim): Test out my take on blinry's vimboy wiki

Today i watched the recording of Blinry's talk about their personal wiki
at MRMCD23 [1] and was intrigued by the simplicity of it.

For now i only took the highlight group, syntax match and autocmd to set
the filetype.
This gives me the highlighting of 'wiki files'. As for opening those
files i'll use `gf`.

I'll probably iterate on this if i like and use it to a degree.

[1] https://media.ccc.de/v/2023-301-warum-ihr-alle-ein-persnliches-wiki-haben-wollt

.config/nvim/lua/config/autocmds.lua

@@ -1,3 +1,11 @@
 -- Autocmds are automatically loaded on the VeryLazy event
 -- Default autocmds that are always set: https://github.com/LazyVim/LazyVim/blob/main/lua/lazyvim/config/autocmds.lua
 -- Add any additional autocmds here
+
+--- test blinry's wiki setup
+vim.api.nvim_create_autocmd({ "bufnewfile", "bufread" }, {
+  pattern = os.getenv("HOME") .. "/Documents/wiki/*",
+  callback = function()
+    vim.bo.filetype = "hiswiki"
+  end,
+})

.config/nvim/syntax/hiswiki.lua

@@ -0,0 +1,13 @@
+-- Link the 'hiswikiLink' highlight group to the existing 'Underlined' group.
+vim.api.nvim_set_hl(0, "hiswikiLink", { link = "Underlined" })
+
+-- Remove all existing hiswikiLink syntax matches.
+vim.cmd("syntax clear hiswikiLink")
+
+-- Find the directory of the current file.
+local base_dir = vim.fn.expand("%:h")
+
+-- Loop through all files in the directory, and add a syntax match for each one.
+for _, file in ipairs(vim.fn.readdir(base_dir)) do
+  vim.cmd("syntax match hiswikiLink /\\c\\V\\<" .. vim.fn.escape(file, "/\\") .. "/")
+end