Re: [PATCH 0/2] Respecting core.autocrlf when showing objects

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Marius Storm-Olsen <marius@xxxxxxxxxxxxx> writes:

> Johannes Schindelin said the following on 11.06.2008 21:06:
>> On Wed, 11 Jun 2008, Marius Storm-Olsen wrote:
>>> Well, consider this:
>>>
>>> Say you are merging two branches, and know that you want to just
>>> use the parts which conflict from the branch being merged in. Then
>>> you simply do:
>>>
>>> 	git merge side
>>> 	git show :3:file.txt > file.txt
>>
>> This is not really how I would do things.  I would do
>>
>> 	git checkout side file.txt here.
>
> Uhm, 'git checkout side file.txt' is not the same file content
> (ignoring EOLs please) as 'git show :3:file.txt'.
> Ref: user-manual.html#conflict-resolution

Bruce, I think the comment in this quoted section is wrong.

True, the combined diff can show only the interesting differences between
the three, but that is not because we munge stage #2 and #3.  They contain
verbatim copies from the HEAD and the MERGE_HEAD respectively, and the
combining logic runs three-way diffs between the three stages to discard
the hunks that the result comes solely from either stage #2 or stage #3.

So perhaps something like this is in order...

---

 Documentation/user-manual.txt |   15 +++++++--------
 1 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/Documentation/user-manual.txt b/Documentation/user-manual.txt
index bfde507..64a820b 100644
--- a/Documentation/user-manual.txt
+++ b/Documentation/user-manual.txt
@@ -1254,16 +1254,15 @@ these three "file stages" represents a different version of the file:
 
 -------------------------------------------------
 $ git show :1:file.txt	# the file in a common ancestor of both branches
-$ git show :2:file.txt	# the version from HEAD, but including any
-			# nonconflicting changes from MERGE_HEAD
-$ git show :3:file.txt	# the version from MERGE_HEAD, but including any
-			# nonconflicting changes from HEAD.
+$ git show :2:file.txt	# the version from HEAD.
+$ git show :3:file.txt	# the version from MERGE_HEAD.
 -------------------------------------------------
 
-Since the stage 2 and stage 3 versions have already been updated with
-nonconflicting changes, the only remaining differences between them are
-the important ones; thus linkgit:git-diff[1] can use the information in
-the index to show only those conflicts.
+When you ask linkgit:git-diff[1] to show the conflicts, it runs a
+three-way diff between the conflicted merge results in the work tree with
+stages 2 and 3 to show only hunks whose contents come from both sides,
+mixed (in other words, when a hunk's merge results come only from stage 2,
+that part is not conflicting and is not shown.  Same for stage 3).
 
 The diff above shows the differences between the working-tree version of
 file.txt and the stage 2 and stage 3 versions.  So instead of preceding
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