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bk resolving(7.3.3)	    BitKeeper User's Manual	   bk resolving(7.3.3)

NAME
       bk resolving - help on resolving	conflicts

DESCRIPTION
       This  section  documents	 the merge process started by the resolve com-
       mand.  See bk resolve for details on using resolve.

       While in	resolve, you can press ENTER to	see a summary of the commands.

       The bk resolve command prompts you on each file that has	conflicts.   A
       conflict	is defined as two deltas made in parallel in different reposi-
       tories.	If the conflict	does not have any overlapping lines,  then  it
       may  have  been automerged, depending if	bk resolve was run with	the -a
       option.

       There are other sorts of	conflicts besides  the	typical	 file  content
       conflicts.   BitKeeper manages file names, permissions, flags, and sym-
       bolic tags in the same way as it	manages	 file  contents.   That	 means
       that  you  can  have a permissions conflict if, for example, one	person
       changed the file	to 0755	mode and another changed it to 0777 mode.

       The resolve process for all conflicts is	fairly similar.	 For each type
       of  conflict on each file, you will be prompted for an action.  To view
       a brief summary of the conflict and a list of available actions,	 press
       ENTER  (or  ?   or  help).  The choices usually include a more detailed
       explanation of the situation; we	try to consistently make  this	avail-
       able as the x command (as in eXplain).

       Some  of	 the  available	actions	allow you to diff the files, view file
       history,	and merge using	graphical tools, etc.  See the command summary
       for the full list.

MULTIPLE USERS
       Only  one  user is allowed to run the resolver at any given time.  If a
       second user attempts to run bk resolve, they will get an	error  message
       indicating that another user is already running the resolver.

       It  is also possible to have multiple users resolve a set of conflicts.
       A typical way to	do this	is to use the bk conflicts command  to	get  a
       list  of	 files	that  need manual resolving along with a list of users
       responsible for the conflicting changes.	 Then each  user  takes	 turns
       invoking	the resolver on	the list of files for which they are responsi-
       ble, checking in	the changes as they go.	 After the  conflicts  in  the
       individual files	have been resolved and checked in, the bk resolve com-
       mand is run with	no arguments in	order to finish	the process and	commit
       a  changeset.  The changes for each file	will be	attributed to the user
       that committed that particular file.  The changeset will	be  attributed
       to the user that	does the final commit of the changeset.

       In  this	 context,  as  well  as	 the single user case, it is sometimes
       desirable to quit the resolver and restart it at	a  later  time.	  When
       the  resolver is	re-invoked, it will not	ask the	user to	re-merge files
       that have already been resolved and will	continue where the  user  left
       off  on	the previous invocation.  This process can be repeated as many
       times as	desired	until all conflicts have been resolved.

VIEW DIFFERENCES AND HISTORY
       To see the diffs	use the	d command.  For	side-by-side diffs, use	the sd
       command.	  You can also diff one	or the other branches against the com-
       mon ancestor using dr or	dl.  Type D to get a  graphical,  color	 coded
       side-by-side diff browser.

       There  are  also	built-in commands to show the history of the file (see
       h, hl, hr).  In addition, p starts the the graphical file browser which
       allows you to view the difference between versions by clicking the left
       button on the earlier rev and the right button on  a  later  rev.   The
       bottom  of  the	screen will show the diffs.  If	you type Return	at the
       prompt, the three revisions forming the merge are part of the help mes-
       sage.

MERGING	CONTENTS
       When  in	 resolve, there	are four different files for each merge.  They
       are:

       local  The version of the file in the local repository.
       remote The version of the file in the other repository.
       merge  The merged file.
       GCA    A	common ancestor	of the local/remote versions.

       Your goal is to generate	the merge file using one of the	methods	below.

       The easiest and most popular merge method is to use the m  command  for
       cases  where  there  are	 no  overlapping lines.	This method performs a
       three-way diff and merge	and  warns  you	 when  there  are  overlapping
       lines.	If  there  are overlaps, you have to edit the merged file (use
       the e command), find the	conflict markers which	look  like  "<<<<"  or
       ">>>>",	and  manually  fix  the	conflicts.  This command requires care
       since non-overlapping lines does	not mean that the merge	makes semantic
       sense.

       If the merge looks complicated, a good approach is to start up the file
       browser with p and then start up	a side-by-side filemerge with f.  Then
       walk  through  the  diffs,  picking and choosing	with blocks of code to
       use.  If	you get	confused about who added what, you can go to the  his-
       tory  tool  browser  (bk	revtool) and left click	on the common ancestor
       and right click on each of the two tips of the trunk/branch to see  who
       added what.

       It  is  also  possible  to use a	combination of graphical tools and the
       automatic merge.	 You can type p	to run the  file  browser,  D  to  run
       difftool,  m  to	do the merge, and then e to edit the merged file.  The
       file browser is run in the background so	you can	look  at  the  various
       changes	as  described  above.  Warning:	if you are running your	editor
       and the file merge program, then	both are working on  the  same	output
       file and	whichever one writes it	last, overwrites any earlier versions.

       You  may	 also  call  an	 external  tool	to merge changes.  When	in the
       resolver, if you	say

	   file.c>> !command

       then command will be run	with the following environment variables set:

       BK_LOCAL	 pathname of a temp file containing the	local version
       BK_GCA	 file containing the common ancestor
       BK_REMOTE pathname of a temp file containing the	remote version
       BK_MERGE	 pathname where	the merged content should be placed

COMMIT
       The merge process is not	complete until you commit the file with	the  C
       command	at  the	 resolve  prompt.  This	means you can merge repeatedly
       until you are happy with	the results.  Each time	you  merge  and	 save,
       however,	you overwrite the previous merge attempt.

       When you	are happy with your merged file, click done in filemerge, exit
       the file	browser, and type C at the prompt to commit the	file and  move
       on to the next one.

SEE ALSO
       bk-conflicts,  bk-fm3tool, bk-fmtool, bk-merge, bk-resolve, bk-revtool,
       bk-smerge

CATEGORY
       Overview
       Repository

BitKeeper Inc			      1E1		   bk resolving(7.3.3)

NAME | DESCRIPTION | MULTIPLE USERS | VIEW DIFFERENCES AND HISTORY | MERGING CONTENTS | COMMIT | SEE ALSO | CATEGORY

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