View the planets (#12)

* add planets viewer builtin

* Remove print statement

* Don't use fzf & echo

* Add all planets as files and refactor accordingly

* Remove planets.lua

* add the moon

* example ofe how to do this without ls everywhere

* fix rebase and update to new style

Co-authored-by: TJ DeVries <devries.timothyj@gmail.com>

lua/telescope/previewers.lua

@@ -12,6 +12,7 @@ Previewer.__index = Previewer
 
 local bat_options = " --style=grid --paging=always "
 local previewer_ns = vim.api.nvim_create_namespace('telescope.previewers')
+
 --  --terminal-width=%s
 
 -- TODO: We shoudl make sure that all our terminals close all the way.
@@ -317,6 +318,21 @@ previewers.help = defaulter(function(_)
   }
 end, {})
 
+previewers.planet_previewer = previewers.new {
+  preview_fn = function(self, entry, status)
+    local bufnr = vim.api.nvim_create_buf(false, true)
+
+    vim.api.nvim_win_set_buf(status.preview_win, bufnr)
+
+    local termopen_command = "bat " .. entry.value
+
+    -- HACK! Requires `termopen` to accept buffer argument.
+    vim.cmd(string.format("noautocmd call win_gotoid(%s)", status.preview_win))
+    vim.fn.termopen(termopen_command)
+    vim.cmd(string.format("noautocmd call win_gotoid(%s)", status.prompt_win))
+  end
+}
+
 previewers.Previewer = Previewer
 
 return previewers