nvim: Get beancount python env from dynamic home env

While we are still hacking our way around a specific pipx venv (which
has to change), we are at least not hardcoding my own home directory
name anymore.

nvim/.config/nvim/lua/plugins/completion.lua

@@ -1,3 +1,5 @@
+local is_available = require("core.util").is_available
+
 local completion_engine = {
 	{
 		"hrsh7th/nvim-cmp",
@@ -178,11 +180,12 @@ local snippet_engine = {
 			"benfowler/telescope-luasnip.nvim",
 			dependencies = { { "nvim-telescope/telescope.nvim", optional = true } },
 			config = function()
-				if require("core.util").is_available("telescope") then
+				if is_available("telescope") then
 					require("telescope").load_extension("luasnip")
 				end
 			end,
 		},
+		{ "hrsh7th/nvim-cmp", optional = true },
 	},
 	event = { "InsertEnter" },
 	build = "make install_jsregexp",
@@ -237,15 +240,10 @@ local beancount_cmp = {
 	},
 	ft = "beancount",
 	opts = function(_, opts)
-		vim.g.python3_host_prog = "/home/marty/.local/pipx/venvs/beancount/bin/python"
+		-- FIXME: Find a way to dynamically derive environment
+		vim.g.python3_host_prog = os.getenv("HOME") .. "/.local/pipx/venvs/beancount/bin/python"
 		table.insert(opts.sources, {
 			name = "beancount",
-			-- option = {
-			--     -- TODO: implement dynamically
-			--     -- I believe if we don't supply this it automatically takes
-			--     -- from the open file which would be good enough
-			-- 	account = "/home/marty/documents/records/budget/main.beancount",
-			-- },
 		})
 	end,
 }