Add func snippet for go

snippets/go.lua

@@ -0,0 +1,59 @@
+# Go LuaSnip Snippets
+
+local luasnip = require('luasnip')
+local snip = luasnip.snippet
+local text = luasnip.text_node
+local ins = luasnip.insert_node
+local func = luasnip.function_node
+local node = luasnip.snippet_node
+local key = require("luasnip.nodes.key_indexer").new_key
+
+local function short_name(name)
+  local short = string.lower(string.sub(name, 1, 1))
+  for i = 2, #name do
+    local char = string.sub(name, i, i)
+    if char == string.upper(char) then
+      short = short .. char
+    end
+  end
+  return string.lower(short)
+end
+
+local snippets = {
+
+  snip('func', {
+    text('func '),
+    node(1, {
+      func(function(args)
+        if string.len(args[1][1]) > 0 then
+          return '(' .. short_name(args[1][1]) .. ' *'
+        end
+        return ''
+      end, key('type')),
+      ins(1, '', { key = 'type' }),
+      func(function(args)
+        if string.len(args[1][1]) > 0 then
+          return ') '
+        end
+        return ''
+      end, key('type')),
+    }),
+    ins(2, 'name'),
+    text('('),
+    ins(3, ''),
+    text(') '),
+    ins(4, '', { key = 'return' }),
+    func(function(args)
+      if string.len(args[1][1]) > 0 then
+        return ' '
+      end
+      return ''
+    end, key('return')),
+    text({ '{', '\t' }),
+    ins(0, ''),
+    text({ '', '}' }),
+  }),
+
+}
+
+return snippets