Watching a video online, I got these chords.
G                                       Am                            Bm                      C      
Welcome in my thirsty fellows, hang your hats inside the door
               G                         Am                                 Bm                        C      
If we’re only packed to bursting, then there’s surely room for more
            G                           Am                           Bm                   C
We’ll deny the cold of winter, we’ll have only song and cheer
             G                      Am                C                            G            
As we gather here together in the threshold of the year.

Chorus:
G                                                       C                         G                            C
And here’s a dram to warm the piper, here’s a dram to warm the hall
G                                             Am                            Bm   C    D         G
Here’s a dram to raise the rafters. And here’s long life to you all