[extregs] initial commit.HEADmain

added a bunch of useful extregs

1 files changed, 26 insertions, 0 deletions

diff --git a/lua/extregs/file.lua b/lua/extregs/file.lua
new file mode 100644
index 0000000..0dfe88c
--- /dev/null
+++ b/lua/extregs/file.lua
@@ -0,0 +1,26 @@
+local util = require('extregs.util')
+local storage = require('extregs.storage')
+local M = {}
+
+function M.get_provider(cfg)
+  local function path() return util.path(cfg.path) end
+  return {
+    read = function()
+      local fd, err = io.open(path(), 'rb')
+      if not fd then error('cannot read ' .. path() .. ': ' .. tostring(err)) end
+      local data = fd:read('*a')
+      fd:close()
+      return storage.decode(data)
+    end,
+    write = function(_, reg)
+      local dest = path()
+      vim.fn.mkdir(vim.fn.fnamemodify(dest, ':h'), 'p')
+      local fd, err = io.open(dest, 'wb')
+      if not fd then error('cannot write ' .. dest .. ': ' .. tostring(err)) end
+      assert(fd:write(storage.encode(reg)))
+      assert(fd:close())
+      return true
+    end,
+  }
+end
+return M