#1060 use one log file with the option to truncate (#1075)

README.md

@@ -191,6 +191,7 @@ require'nvim-tree'.setup {
   },
   log = {
     enable = false,
+    truncate = false,
     types = {
       all = false,
       config = false,

doc/nvim-tree-lua.txt

@@ -164,6 +164,7 @@ function.
       },
       log = {
 	enable = false,
+	truncate = false,
 	types = {
 	  all = false,
 	  config = false,
@@ -476,6 +477,10 @@ Here is a list of the options available in the setup call:
       type: `boolean`
       default: `false`
 
+  - |log.truncate|: remove existing log file at startup
+      type: `boolean`
+      default: `false`
+
   - |log.types|: specify which information to log
 
     - |log.types.all|: everything

lua/nvim-tree.lua

@@ -395,6 +395,7 @@ local DEFAULT_OPTS = {
   },
   log = {
     enable = false,
+    truncate = false,
     types = {
       all = false,
       config = false,

lua/nvim-tree/log.lua

@@ -19,20 +19,23 @@ function M.raw(typ, fmt, ...)
   io.close(file)
 end
 
--- Write to log file
+-- Write to log file via M.raw
 -- time and typ are prefixed and a trailing newline is added
 function M.line(typ, fmt, ...)
   if not M.path or not M.config.types[typ] and not M.config.types.all then
     return
   end
 
-  M.raw(typ, string.format("[%s] [%s] %s\n", os.date "%H:%M:%S", typ, fmt), ...)
+  M.raw(typ, string.format("[%s] [%s] %s\n", os.date "%Y:%m:%d %H:%M:%S", typ, fmt), ...)
 end
 
 function M.setup(opts)
   M.config = opts.log
   if M.config and M.config.enable and M.config.types then
-    M.path = string.format("%s/nvim-tree-%s-%s.log", vim.fn.stdpath "cache", os.date "%H:%M:%S", vim.env.USER)
+    M.path = string.format("%s/nvim-tree.log", vim.fn.stdpath "cache", os.date "%H:%M:%S", vim.env.USER)
+    if M.config.truncate then
+      os.remove(M.path)
+    end
     print("nvim-tree.lua logging to " .. M.path)
   end
 end