feat: first draft

lua/oil/adapters/test.lua

@@ -0,0 +1,62 @@
+local cache = require("oil.cache")
+local M = {}
+
+---@param path string
+---@param column_defs string[]
+---@param cb fun(err: nil|string, entries: nil|oil.InternalEntry[])
+M.list = function(url, column_defs, cb)
+  cb(nil, cache.list_url(url))
+end
+
+---@param name string
+---@return nil|oil.ColumnDefinition
+M.get_column = function(name)
+  return nil
+end
+
+---@param path string
+---@param entry_type oil.EntryType
+M.test_set = function(path, entry_type)
+  local parent = vim.fn.fnamemodify(path, ":h")
+  if parent ~= path then
+    M.test_set(parent, "directory")
+  end
+  local url = "oil-test://" .. path
+  if cache.get_entry_by_url(url) then
+    -- Already exists
+    return
+  end
+  local name = vim.fn.fnamemodify(path, ":t")
+  cache.create_and_store_entry("oil-test://" .. parent, name, entry_type)
+end
+
+---@param bufnr integer
+---@return boolean
+M.is_modifiable = function(bufnr)
+  return true
+end
+
+---@param url string
+M.url_to_buffer_name = function(url)
+  error("Test adapter cannot open files")
+end
+
+---@param action oil.Action
+---@return string
+M.render_action = function(action)
+  if action.type == "create" or action.type == "delete" then
+    return string.format("%s %s", action.type:upper(), action.url)
+  elseif action.type == "move" or action.type == "copy" then
+    return string.format("  %s %s -> %s", action.type:upper(), action.src_url, action.dest_url)
+  else
+    error("Bad action type")
+  end
+end
+
+---@param action oil.Action
+---@param cb fun(err: nil|string)
+M.perform_action = function(action, cb)
+  cb()
+end
+
+return M