Guy Clark is the man.
This is the title track from the Dublin Blues CD
Townes Van Zandt also cut a version of this song.


Nothing fancy- 

D                     G(add5)  D
I wish I was in Austin
                    A
In the Chili Parlour Bar
         D
Drinkin' Mad Dog Margaritas
         G               D
And not carin' where you are


D                       G(add5)  Dss
But here I sit in Dublin||
      A -i
Just rollin' cigarettes
D
Holdin' back and chokin' back
      G                D
The shakes with every breath


CHORUS:
A
Forgive me all my anger
   D
Forgive me all my faults
        A
There's no need to forgive me
      D
For thinkin' what I though

   A
I loved you from the git go
     D
I'll love you till I die
   A
I loved you on the Spanish steps
     G                D
The day you said goodbye


I am just a poor boy
Work's my middle name
If money was a reason
I would not be the same

I'll stand up and be counted
I'll face up to the truth
I'll walk away from trouble
But I can't walk away from you

I have been to Fort Worth
I have been to Spain
I have been to proud
To come in out of the rain

I have seen the David
I've seen the Mona Lisa too
I have heard Doc Watson
Play Columbus Stockade Blues

Repeat Chorus and end with the first verse again.  
and that's all there is to it