Since Jitesh is currently writing an extremely interesting series of posts on diff and patch 1 ,2 , I decided to pitch in with my contribution. Ediff is one of those things which make Emacs so much more than just an editor. You get the point. Following the teaching tradition I prefer, lets get our hands down and dirty, and figure out the theory along the way:. Step 1: Write two test files for our purposes. The mini-buffer will ask you to enter the two files to compare A and B.
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It only takes a minute to sign up. Anyhow, the original question is: how do I make Ediff resolve a merge conflict by putting the content from both buffers A and B into buffer C I know I can just edit C, but would hope this can be done more easily.
I want the file C , the result of merging A with B to look like this:. My answer below is no use, as you evidentially can't get the desired result that way. I'm only not deleting it because the information it does give is somewhat relevant, and might still prove interesting information to someone. Personally I do just edit the merge buffer directly, but you can teach Emacs what to do if you have a standard requirement.
Combine Nth diff regions of buffers A and B and place the combination in C. N is a prefix argument. If nil, combine the current difference regions. Combining is done according to the specifications in variable ediff-combination-pattern. Pattern to be used for combining difference regions in buffers A and B.
Note that when you think it's doing nothing, it's actually combining the variants using the normal conflict markers. Sign up to join this community. The best answers are voted up and rise to the top.
Home Questions Tags Users Unanswered. How to use both variants in Ediff? Ask Question. Asked 4 years, 5 months ago. Active 3 years, 5 months ago. Viewed 2k times. I'm not sure I entirely understand the question, but this Ediff manual section on merging and diff3 may help.
TianxiangXiong I'll add an example of what I mean. I don't think the linked manual page covers it. Active Oldest Votes. See this StackOverflow answer. From killdash9 : Pressing d will copy both A and B to buffer C.
Tianxiang Xiong Tianxiang Xiong 3, 9 9 silver badges 22 22 bronze badges. Because the duplicate is also on the StackExchange network and consequently if people can get to this site they will be able to get to that one as well , I'm in favour of not copying the code, but purely linking to the answer as a general approach to handling cross-site duplicates. That way if the original answer is improved, there aren't outdated copies floating around on other sites. Up-voted, regardless. I was under the impression that StackExchange sites usually prefer to have an answer on the site itself, rather than simply a link.
But maybe it's different if the link is another StackExchange site? I actually don't know what the official policy is, but I certainly think intra-network links should be treated differently to out-of-network links. Not using links in general means that the answer is accessible even if the remote source is unavailable, but I think it would be highly unlikely for only part of the StackExchange network to be available at any given time, so I think that argument goes away; at which point the question is whether it's sensible to divide the answers between two different duplicate questions, and I believe that's almost never helpful.
IMO, anyhow. Wouldn't my altering of ediff-combination-pattern remove the traditional conflict markings used by default? I'd really like to keep the conflict that way until I resolve it by using whichever combination of diffs from merged files.
The conflict markers originate outside of Emacs, so I doubt that's the case, but I don't actually know. Try it? I will, but later today. I'll update once I know. In fact you're right -- ediff processes and converts all the conflict regions according to that pattern before presenting the buffers. You might, however, add a custom binding for a command which let-binds ediff-combination-pattern to your custom pattern and then calls ediff-combine-diffs.
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This section describes how to enter Ediff from Magit buffers. For information on how to use Ediff itself, see ediff Top. This command tries to guess what file, and what commit or range the user wants to compare, stage, or resolve using Ediff. This transient prefix command binds the following suffix commands and displays them in a temporary buffer until a suffix is invoked.