fix: centralize and nixifiy in 'zk' module

dots/.config/nvim/after/plugin/wiki.vim.lua

@@ -1,6 +1,8 @@
+require("zk.utils")
+
 vim.cmd([[
 " Change local buffer to directory of current file after the plugin has loaded
-autocmd VimEnter * lcd %:p:h
+execute 'autocmd BufEnter' g:zk_path . '/*.md' 'silent lcd %:p:h'
 
 " " Override wiki index mapping to also cd into the wiki
 nm <leader>ww <plug>(wiki-index)
@@ -76,7 +78,7 @@ let g:wiki_templates = [
 "
 
 let g:wiki_filetypes=['md']
-let g:wiki_root='~/.zk'
+let g:wiki_root=g:zk_path
 let g:wiki_global_load=0
 let g:wiki_link_creation = {
       \ 'md': {

dots/.config/nvim/lua/zk/init.lua

@@ -1,9 +1,10 @@
 require("zk.cmp")
+require("zk.utils")
 
 vim.cmd([[
 let s:zk_preview_enabled = 0
 let s:live_server_job = -1
-au BufEnter /home/h/.zk/*.md silent exe '!echo "%" > /home/h/.zk/current-zettel.txt'
+execute 'au BufEnter' g:zk_path . '/*.md' 'silent exe "!echo %" ">" g:zk_path . "/current-zettel.txt"'
 function! ToggleZKPreview()
     if s:zk_preview_enabled == 1
         let s:zk_preview_enabled = 0
@@ -11,10 +12,10 @@ function! ToggleZKPreview()
         au! ZKPreview
     else
         let s:zk_preview_enabled = 1
-        let s:live_server_job = jobstart('live-server --watch=/home/h/.zk/current-zettel-content.html --open=current-zettel-content.html --port=8080')
+        let s:live_server_job = jobstart('live-server --watch=' . g:zk_path . '/current-zettel-content.html --open=current-zettel-content.html --port=8080')
         augroup ZKPreview
-          au BufEnter /home/h/.zk/*.md silent exe '!cat "%:r.html" > /home/h/.zk/current-zettel-content.html'
-          au BufWritePost /home/h/.zk/*.md silent exe '!make && cat "%:r.html" > /home/h/.zk/current-zettel-content.html'
+          execute 'au BufEnter' g:zk_path . '/*.md' 'silent exe "!cat %:r.html" ">" g:zk_path . "/current-zettel-content.html"'
+          execute 'au BufWritePost' g:zk_path . '/*.md' 'silent exe "!make && cat %:r.html" ">" g:zk_path . "/current-zettel-content.html"'
         augroup END
     endif
 endfunction

dots/.config/nvim/lua/zk/utils.lua

@@ -0,0 +1,2 @@
+vim.g.zk_path = os.getenv("ZK_PATH") or (os.getenv("HOME") .. "/.zk")
+return vim.g.zk_path