Add spacevim lua logger (#4398)

lua/spacevim/api/logger.lua

@@ -81,6 +81,30 @@ function M.info(msg)
     end
 end
 
+function M.view(l)
+  local info = ''
+  local logs = ''
+  if fn.filereadable(M.file) == 1 then
+    logs = fn.readfile(M.file, '')
+    info = info .. fn.join(fn.filter(logs, 'self._comp(v:val, a:l)'), "\n")
+  else
+    info = info .. '[ ' .. M.name .. ' ] : logger file ' .. M.file
+          .. ' does not exists, only log for current process will be shown!'
+          ..  "\n"
+          for key, value in pairs(M.temp) do
+              if M._comp(value, l) == 1 then
+                  info = info .. value .. "\n"
+              end
+          end
+  end
+  return info
+    
+end
+
+function M._comp(a, b)
+    
+end
+
 function M.set_name(name)
     M.name = name
 end

lua/spacevim/logger.lua

@@ -0,0 +1,84 @@
+local M = {}
+
+local logger = require('spacevim.api').import('logger')
+local cmd = require('spacevim').cmd
+local fn = nil
+if vim.fn == nil then
+    fn = require('spacevim').fn
+else
+    fn = vim.fn
+end
+
+logger.set_name('SpaceVim')
+logger.set_level(1)
+logger.set_silent(1)
+logger.set_verbose(1)
+
+
+
+function M.info(msg)
+    logger.info(msg)
+end
+
+function M.warn(msg, ...)
+    logger.warn(msg, ...)
+end
+
+function M.error(msg)
+    logger.error(msg)
+end
+
+function M.setLevel(level)
+    logger.set_level(level)
+end
+
+function M.setOutput(file)
+    logger.set_file(file)
+end
+
+function M.viewRuntimeLog()
+  local info = "### SpaceVim runtime log :\n\n"
+  ..  "```log\n"
+  .. logger.view(logger.level)
+  .. "\n```\n"
+  cmd('tabnew')
+  cmd('setl nobuflisted')
+  cmd('nnoremap <buffer><silent> q :tabclose!<CR>')
+  -- put info into buffer
+  fn.append(0, fn.split(info, "\n"))
+  cmd('setl nomodifiable')
+  cmd('setl buftype=nofile')
+  cmd('setl filetype=markdown')
+  M.syntax_extra()
+end
+
+function M.syntax_extra()
+  fn.matchadd('ErrorMsg','.*[\\sError\\s\\].*')
+  fn.matchadd('WarningMsg','.*[\\sWarn\\s\\].*')
+end
+
+function M.derive(name)
+    local derive = {}
+    derive['origin_name'] = logger.get_name()
+
+    function derive.info()
+        logger.set_name(self.derive_name)
+        logger.info(msg)
+        logger.set_name(self.origin_name)
+    end
+    function derive.warn()
+        logger.set_name(self.derive_name)
+        logger.warn(msg)
+        logger.set_name(self.origin_name)
+    end
+    function derive.error()
+        logger.set_name(self.derive_name)
+        logger.error(msg)
+        logger.set_name(self.origin_name)
+    end
+
+    derive['derive_name'] = fn.printf('%' .. fn.strdisplaywidth(logger.get_name()) .. 'S', name)
+    return derive
+end
+
+return M