refactor(nvim): extract follow engine into dotfiles.follow module

1 files changed, 23 insertions, 0 deletions

diff --git a/.config/nvim/plugin/50-nvim-help.lua b/.config/nvim/plugin/50-nvim-help.lua
new file mode 100644
index 0000000..926bb68
--- /dev/null
+++ b/.config/nvim/plugin/50-nvim-help.lua
@@ -0,0 +1,23 @@
+-- `nvim-help://<tag>` — open Neovim help for <tag> in a scratch, read-only
+-- buffer. Registered with the follow engine (see 50-follow.lua).
+
+require("dotfiles.follow").register_scheme("nvim-help", {
+	resolve = function(uri)
+		local tagfiles = {}
+		for _, path in pairs(vim.opt.runtimepath:get()) do
+			tagfiles[#tagfiles + 1] = path .. "/doc/tags"
+		end
+		vim.opt_local.tags = tagfiles
+		local matches = vim.fn.taglist(uri)
+		if #matches == 0 then
+			return nil, "No help page found for nvim-help://" .. uri
+		end
+		return matches[1].filename
+	end,
+	after = function()
+		vim.opt_local.bufhidden = "wipe"
+		vim.opt_local.buftype = "nofile"
+		vim.opt_local.swapfile = false
+		vim.opt_local.readonly = true
+	end,
+})