Tip #492: jump to file from :CVSDiff output

created:		June 24, 2003 2:07		complexity:		basic
author:		daniel kullmann		as of Vim:		5.7

I use :CVSDiff from cvscommand.vim quite often to get an overview of the changes i made to a file.
I always want to jump from the diff to the corresponding line in the original file.
So I wrote a small script that does that, and put it in $VIM/after/syntax/diff.vim
Pressing <Return> will execute that script.

function! DiffJumpToFile()
  let a=line(".")                                " current line number
  let b=search("^\\(---\\|\\*\\*\\*\\) ", "b")   " search for line like *** 478,489 ***
  let c=getline(b)                               " get this line as string
  let d=strpart(c, 4, match(c, ",")-4)           " get the first line number (478) from that string

  let f=search("^\\(---\\|\\*\\*\\*\\) .*\\t", "b") " search for line like *** fileincvs.c  ....
  let g=getline(f)                                  " get this line as string
  let h=match (g, "\\t", 4)                         " look for end of filename (terminated by tab) in string
  let i=strpart(g, 4, h-4)                          " get the filename

  execute ":b " . i                                 | " change to that file
  execute "normal " . (d+a-b-1) . "G"               | " go to right line number
endfunction

nmap <buffer> <Return> :call DiffJumpToFile()<CR>

I didn't put that script in the script section because it doesn't have any error checking at all.


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