[The basic idea looks plausible to me, although I haven't looked in
any detail, either at just what it changes in CVS's output, or at how
patch would react (various versions of patch; other such programs if
any).

-kingdon]

Date: Tue, 27 Jan 1998 11:13:11 +0000
To: info-cvs@prep.ai.mit.edu
From: Andy Piper <andyp@parallax.co.uk>
Subject: patch for diff pathnames
Cc: bug-cvs@prep.ai.mit.edu

I don't know if anyone has done this already but this patch achieves the
same effect as the unofficial path for including file paths in diff output
but for cvs's which have diff builtin. The patch is very simple and just
modifies the label generation code.

andy

*** rcs.c.dist	Tue Jan 27 11:04:46 1998
--- rcs.c	Tue Jan 27 11:05:29 1998
***************
*** 6649,6655 ****
      char *file;
  
      file = last_component (path);
!     label = (char *) xmalloc (strlen (file)
  			      + (rev == NULL ? 0 : strlen (rev))
  			      + 50);
  
--- 6649,6655 ----
      char *file;
  
      file = last_component (path);
!     label = (char *) xmalloc (strlen (path)
  			      + (rev == NULL ? 0 : strlen (rev))
  			      + 50);
  
***************
*** 6658,6664 ****
  	char *date;
  	RCS_getrevtime (rcs, rev, datebuf, 0);
  	date = printable_date (datebuf);
! 	(void) sprintf (label, "-L%s\t%s\t%s", file, date, rev);
  	free (date);
      }
      else
--- 6658,6664 ----
  	char *date;
  	RCS_getrevtime (rcs, rev, datebuf, 0);
  	date = printable_date (datebuf);
! 	(void) sprintf (label, "-L%s\t%s\t%s", path, date, rev);
  	free (date);
      }
      else
***************
*** 6675,6681 ****
  			    wm->tm_year + 1900, wm->tm_mon + 1,
  			    wm->tm_mday, wm->tm_hour,
  			    wm->tm_min, wm->tm_sec);
! 	    (void) sprintf (label, "-L%s\t%s", file, datebuf);
  	}
      }
      return label;
--- 6675,6681 ----
  			    wm->tm_year + 1900, wm->tm_mon + 1,
  			    wm->tm_mday, wm->tm_hour,
  			    wm->tm_min, wm->tm_sec);
! 	    (void) sprintf (label, "-L%s\t%s", path, datebuf);
  	}
      }
      return label;

   ___                ____         	Dr Andy Piper
  / _ \___ ________ _/ / Solutions_	(require 'disclaimer)
 / ___/ _ `/ __/ _ `/ / / _ `/\ \ /	andyp@parallax.co.uk
/_/   \_,_/_/  \_,_/_/_/\_,_//_\_\ 	boot /vmemacs