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Merge branch 'en/zdiff3'
"Zealous diff3" style of merge conflict presentation has been added. * en/zdiff3: update documentation for new zdiff3 conflictStyle xdiff: implement a zealous diff3, or "zdiff3"
This commit is contained in:
commit
4ce498baa3
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@ -4,7 +4,14 @@ merge.conflictStyle::
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||||||
shows a `<<<<<<<` conflict marker, changes made by one side,
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shows a `<<<<<<<` conflict marker, changes made by one side,
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a `=======` marker, changes made by the other side, and then
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a `=======` marker, changes made by the other side, and then
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a `>>>>>>>` marker. An alternate style, "diff3", adds a `|||||||`
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a `>>>>>>>` marker. An alternate style, "diff3", adds a `|||||||`
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marker and the original text before the `=======` marker.
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marker and the original text before the `=======` marker. The
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"merge" style tends to produce smaller conflict regions than diff3,
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both because of the exclusion of the original text, and because
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when a subset of lines match on the two sides they are just pulled
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out of the conflict region. Another alternate style, "zdiff3", is
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similar to diff3 but removes matching lines on the two sides from
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the conflict region when those matching lines appear near either
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the beginning or end of a conflict region.
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merge.defaultToUpstream::
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merge.defaultToUpstream::
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If merge is called without any commit argument, merge the upstream
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If merge is called without any commit argument, merge the upstream
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@ -266,8 +266,7 @@ When switching branches with `--merge`, staged changes may be lost.
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The same as `--merge` option above, but changes the way the
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The same as `--merge` option above, but changes the way the
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conflicting hunks are presented, overriding the
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conflicting hunks are presented, overriding the
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`merge.conflictStyle` configuration variable. Possible values are
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`merge.conflictStyle` configuration variable. Possible values are
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"merge" (default) and "diff3" (in addition to what is shown by
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"merge" (default), "diff3", and "zdiff3".
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"merge" style, shows the original contents).
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-p::
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-p::
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--patch::
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--patch::
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@ -70,6 +70,9 @@ OPTIONS
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--diff3::
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--diff3::
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Show conflicts in "diff3" style.
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Show conflicts in "diff3" style.
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--zdiff3::
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Show conflicts in "zdiff3" style.
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--ours::
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--ours::
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--theirs::
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--theirs::
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--union::
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--union::
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@ -240,7 +240,8 @@ from the RCS suite to present such a conflicted hunk, like this:
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------------
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------------
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Here are lines that are either unchanged from the common
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Here are lines that are either unchanged from the common
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ancestor, or cleanly resolved because only one side changed.
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ancestor, or cleanly resolved because only one side changed,
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or cleanly resolved because both sides changed the same way.
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<<<<<<< yours:sample.txt
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<<<<<<< yours:sample.txt
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Conflict resolution is hard;
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Conflict resolution is hard;
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let's go shopping.
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let's go shopping.
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@ -261,16 +262,37 @@ side wants to say it is hard and you'd prefer to go shopping, while the
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other side wants to claim it is easy.
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other side wants to claim it is easy.
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An alternative style can be used by setting the "merge.conflictStyle"
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An alternative style can be used by setting the "merge.conflictStyle"
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configuration variable to "diff3". In "diff3" style, the above conflict
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configuration variable to either "diff3" or "zdiff3". In "diff3"
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may look like this:
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style, the above conflict may look like this:
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------------
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------------
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Here are lines that are either unchanged from the common
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Here are lines that are either unchanged from the common
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ancestor, or cleanly resolved because only one side changed.
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ancestor, or cleanly resolved because only one side changed,
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<<<<<<< yours:sample.txt
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or cleanly resolved because both sides changed the same way.
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Conflict resolution is hard;
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let's go shopping.
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||||||| base:sample.txt
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or cleanly resolved because both sides changed identically.
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Conflict resolution is hard.
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=======
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or cleanly resolved because both sides changed the same way.
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Git makes conflict resolution easy.
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>>>>>>> theirs:sample.txt
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And here is another line that is cleanly resolved or unmodified.
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------------
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while in "zdiff3" style, it may look like this:
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------------
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Here are lines that are either unchanged from the common
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ancestor, or cleanly resolved because only one side changed,
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or cleanly resolved because both sides changed the same way.
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<<<<<<< yours:sample.txt
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<<<<<<< yours:sample.txt
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Conflict resolution is hard;
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Conflict resolution is hard;
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let's go shopping.
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let's go shopping.
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|||||||
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||||||| base:sample.txt
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or cleanly resolved because both sides changed identically.
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Conflict resolution is hard.
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Conflict resolution is hard.
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=======
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=======
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Git makes conflict resolution easy.
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Git makes conflict resolution easy.
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@ -714,9 +714,9 @@ information about the rebased commits and their parents (and instead
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generates new fake commits based off limited information in the
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generates new fake commits based off limited information in the
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generated patches), those commits cannot be identified; instead it has
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generated patches), those commits cannot be identified; instead it has
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to fall back to a commit summary. Also, when merge.conflictStyle is
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to fall back to a commit summary. Also, when merge.conflictStyle is
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set to diff3, the apply backend will use "constructed merge base" to
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set to diff3 or zdiff3, the apply backend will use "constructed merge
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label the content from the merge base, and thus provide no information
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base" to label the content from the merge base, and thus provide no
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about the merge base commit whatsoever.
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information about the merge base commit whatsoever.
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The merge backend works with the full commits on both sides of history
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The merge backend works with the full commits on both sides of history
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and thus has no such limitations.
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and thus has no such limitations.
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@ -92,8 +92,7 @@ in linkgit:git-checkout[1] for details.
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The same as `--merge` option above, but changes the way the
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The same as `--merge` option above, but changes the way the
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conflicting hunks are presented, overriding the
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conflicting hunks are presented, overriding the
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`merge.conflictStyle` configuration variable. Possible values
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`merge.conflictStyle` configuration variable. Possible values
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are "merge" (default) and "diff3" (in addition to what is
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are "merge" (default), "diff3", and "zdiff3".
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shown by "merge" style, shows the original contents).
|
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--ignore-unmerged::
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--ignore-unmerged::
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When restoring files on the working tree from the index, do
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When restoring files on the working tree from the index, do
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|
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@ -137,8 +137,7 @@ should result in deletion of the path).
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The same as `--merge` option above, but changes the way the
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The same as `--merge` option above, but changes the way the
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conflicting hunks are presented, overriding the
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conflicting hunks are presented, overriding the
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`merge.conflictStyle` configuration variable. Possible values are
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`merge.conflictStyle` configuration variable. Possible values are
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"merge" (default) and "diff3" (in addition to what is shown by
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"merge" (default), "diff3", and "zdiff3".
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"merge" style, shows the original contents).
|
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-q::
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-q::
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--quiet::
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--quiet::
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@ -14,9 +14,9 @@ conflicts before writing them to the rerere database.
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Different conflict styles and branch names are normalized by stripping
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Different conflict styles and branch names are normalized by stripping
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the labels from the conflict markers, and removing the common ancestor
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the labels from the conflict markers, and removing the common ancestor
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version from the `diff3` conflict style. Branches that are merged
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version from the `diff3` or `zdiff3` conflict styles. Branches that
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in different order are normalized by sorting the conflict hunks. More
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are merged in different order are normalized by sorting the conflict
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on each of those steps in the following sections.
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hunks. More on each of those steps in the following sections.
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Once these two normalization operations are applied, a conflict ID is
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Once these two normalization operations are applied, a conflict ID is
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calculated based on the normalized conflict, which is later used by
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calculated based on the normalized conflict, which is later used by
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@ -42,8 +42,8 @@ get a conflict like the following:
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>>>>>>> AC
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>>>>>>> AC
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Doing the analogous with AC2 (forking a branch ABAC2 off of branch AB
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Doing the analogous with AC2 (forking a branch ABAC2 off of branch AB
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and then merging branch AC2 into it), using the diff3 conflict style,
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and then merging branch AC2 into it), using the diff3 or zdiff3
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we get a conflict like the following:
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conflict style, we get a conflict like the following:
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<<<<<<< HEAD
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<<<<<<< HEAD
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B
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B
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@ -1536,7 +1536,7 @@ static struct option *add_common_options(struct checkout_opts *opts,
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OPT_BOOL(0, "progress", &opts->show_progress, N_("force progress reporting")),
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OPT_BOOL(0, "progress", &opts->show_progress, N_("force progress reporting")),
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OPT_BOOL('m', "merge", &opts->merge, N_("perform a 3-way merge with the new branch")),
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OPT_BOOL('m', "merge", &opts->merge, N_("perform a 3-way merge with the new branch")),
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OPT_STRING(0, "conflict", &opts->conflict_style, N_("style"),
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OPT_STRING(0, "conflict", &opts->conflict_style, N_("style"),
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N_("conflict style (merge or diff3)")),
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N_("conflict style (merge, diff3, or zdiff3)")),
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OPT_END()
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OPT_END()
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};
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};
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struct option *newopts = parse_options_concat(prevopts, options);
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struct option *newopts = parse_options_concat(prevopts, options);
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@ -34,6 +34,8 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
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struct option options[] = {
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struct option options[] = {
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OPT_BOOL('p', "stdout", &to_stdout, N_("send results to standard output")),
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OPT_BOOL('p', "stdout", &to_stdout, N_("send results to standard output")),
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OPT_SET_INT(0, "diff3", &xmp.style, N_("use a diff3 based merge"), XDL_MERGE_DIFF3),
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OPT_SET_INT(0, "diff3", &xmp.style, N_("use a diff3 based merge"), XDL_MERGE_DIFF3),
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OPT_SET_INT(0, "zdiff3", &xmp.style, N_("use a zealous diff3 based merge"),
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XDL_MERGE_ZEALOUS_DIFF3),
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OPT_SET_INT(0, "ours", &xmp.favor, N_("for conflicts, use our version"),
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OPT_SET_INT(0, "ours", &xmp.favor, N_("for conflicts, use our version"),
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XDL_MERGE_FAVOR_OURS),
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XDL_MERGE_FAVOR_OURS),
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OPT_SET_INT(0, "theirs", &xmp.favor, N_("for conflicts, use their version"),
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OPT_SET_INT(0, "theirs", &xmp.favor, N_("for conflicts, use their version"),
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@ -1566,7 +1566,7 @@ _git_checkout ()
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case "$cur" in
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case "$cur" in
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--conflict=*)
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--conflict=*)
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__gitcomp "diff3 merge" "" "${cur##--conflict=}"
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__gitcomp "diff3 merge zdiff3" "" "${cur##--conflict=}"
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;;
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;;
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--*)
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--*)
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__gitcomp_builtin checkout
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__gitcomp_builtin checkout
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@ -2437,7 +2437,7 @@ _git_switch ()
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|
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case "$cur" in
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case "$cur" in
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--conflict=*)
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--conflict=*)
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__gitcomp "diff3 merge" "" "${cur##--conflict=}"
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__gitcomp "diff3 merge zdiff3" "" "${cur##--conflict=}"
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;;
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;;
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--*)
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--*)
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__gitcomp_builtin switch
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__gitcomp_builtin switch
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@ -2877,7 +2877,7 @@ _git_restore ()
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|
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case "$cur" in
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case "$cur" in
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--conflict=*)
|
--conflict=*)
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__gitcomp "diff3 merge" "" "${cur##--conflict=}"
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__gitcomp "diff3 merge zdiff3" "" "${cur##--conflict=}"
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;;
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;;
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--source=*)
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--source=*)
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__git_complete_refs --cur="${cur##--source=}"
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__git_complete_refs --cur="${cur##--source=}"
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||||||
|
|
|
@ -211,4 +211,94 @@ test_expect_success 'rebase --apply describes fake ancestor base' '
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)
|
)
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'
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'
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|
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test_setup_zdiff3 () {
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test_create_repo zdiff3 &&
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|
(
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|
cd zdiff3 &&
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|
|
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|
test_write_lines 1 2 3 4 5 6 7 8 9 >basic &&
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|
test_write_lines 1 2 3 AA 4 5 BB 6 7 8 >middle-common &&
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test_write_lines 1 2 3 4 5 6 7 8 9 >interesting &&
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test_write_lines 1 2 3 4 5 6 7 8 9 >evil &&
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|
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||||||
|
git add basic middle-common interesting evil &&
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|
git commit -m base &&
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|
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||||||
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git branch left &&
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|
git branch right &&
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|
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||||||
|
git checkout left &&
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test_write_lines 1 2 3 4 A B C D E 7 8 9 >basic &&
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test_write_lines 1 2 3 CC 4 5 DD 6 7 8 >middle-common &&
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||||||
|
test_write_lines 1 2 3 4 A B C D E F G H I J 7 8 9 >interesting &&
|
||||||
|
test_write_lines 1 2 3 4 X A B C 7 8 9 >evil &&
|
||||||
|
git add -u &&
|
||||||
|
git commit -m letters &&
|
||||||
|
|
||||||
|
git checkout right &&
|
||||||
|
test_write_lines 1 2 3 4 A X C Y E 7 8 9 >basic &&
|
||||||
|
test_write_lines 1 2 3 EE 4 5 FF 6 7 8 >middle-common &&
|
||||||
|
test_write_lines 1 2 3 4 A B C 5 6 G H I J 7 8 9 >interesting &&
|
||||||
|
test_write_lines 1 2 3 4 Y A B C B C 7 8 9 >evil &&
|
||||||
|
git add -u &&
|
||||||
|
git commit -m permuted
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
test_expect_success 'check zdiff3 markers' '
|
||||||
|
test_setup_zdiff3 &&
|
||||||
|
(
|
||||||
|
cd zdiff3 &&
|
||||||
|
|
||||||
|
git checkout left^0 &&
|
||||||
|
|
||||||
|
base=$(git rev-parse --short HEAD^1) &&
|
||||||
|
test_must_fail git -c merge.conflictstyle=zdiff3 merge -s recursive right^0 &&
|
||||||
|
|
||||||
|
test_write_lines 1 2 3 4 A \
|
||||||
|
"<<<<<<< HEAD" B C D \
|
||||||
|
"||||||| $base" 5 6 \
|
||||||
|
======= X C Y \
|
||||||
|
">>>>>>> right^0" \
|
||||||
|
E 7 8 9 \
|
||||||
|
>expect &&
|
||||||
|
test_cmp expect basic &&
|
||||||
|
|
||||||
|
test_write_lines 1 2 3 \
|
||||||
|
"<<<<<<< HEAD" CC \
|
||||||
|
"||||||| $base" AA \
|
||||||
|
======= EE \
|
||||||
|
">>>>>>> right^0" \
|
||||||
|
4 5 \
|
||||||
|
"<<<<<<< HEAD" DD \
|
||||||
|
"||||||| $base" BB \
|
||||||
|
======= FF \
|
||||||
|
">>>>>>> right^0" \
|
||||||
|
6 7 8 \
|
||||||
|
>expect &&
|
||||||
|
test_cmp expect middle-common &&
|
||||||
|
|
||||||
|
test_write_lines 1 2 3 4 A B C \
|
||||||
|
"<<<<<<< HEAD" D E F \
|
||||||
|
"||||||| $base" 5 6 \
|
||||||
|
======= 5 6 \
|
||||||
|
">>>>>>> right^0" \
|
||||||
|
G H I J 7 8 9 \
|
||||||
|
>expect &&
|
||||||
|
test_cmp expect interesting &&
|
||||||
|
|
||||||
|
# Not passing this one yet; the common "B C" lines is still
|
||||||
|
# being left in the conflict blocks on the left and right
|
||||||
|
# sides.
|
||||||
|
test_write_lines 1 2 3 4 \
|
||||||
|
"<<<<<<< HEAD" X A \
|
||||||
|
"||||||| $base" 5 6 \
|
||||||
|
======= Y A B C \
|
||||||
|
">>>>>>> right^0" \
|
||||||
|
B C 7 8 9 \
|
||||||
|
>expect &&
|
||||||
|
test_cmp expect evil
|
||||||
|
)
|
||||||
|
'
|
||||||
|
|
||||||
test_done
|
test_done
|
||||||
|
|
|
@ -313,6 +313,8 @@ int git_xmerge_config(const char *var, const char *value, void *cb)
|
||||||
die("'%s' is not a boolean", var);
|
die("'%s' is not a boolean", var);
|
||||||
if (!strcmp(value, "diff3"))
|
if (!strcmp(value, "diff3"))
|
||||||
git_xmerge_style = XDL_MERGE_DIFF3;
|
git_xmerge_style = XDL_MERGE_DIFF3;
|
||||||
|
else if (!strcmp(value, "zdiff3"))
|
||||||
|
git_xmerge_style = XDL_MERGE_ZEALOUS_DIFF3;
|
||||||
else if (!strcmp(value, "merge"))
|
else if (!strcmp(value, "merge"))
|
||||||
git_xmerge_style = 0;
|
git_xmerge_style = 0;
|
||||||
/*
|
/*
|
||||||
|
|
|
@ -66,6 +66,7 @@ extern "C" {
|
||||||
|
|
||||||
/* merge output styles */
|
/* merge output styles */
|
||||||
#define XDL_MERGE_DIFF3 1
|
#define XDL_MERGE_DIFF3 1
|
||||||
|
#define XDL_MERGE_ZEALOUS_DIFF3 2
|
||||||
|
|
||||||
typedef struct s_mmfile {
|
typedef struct s_mmfile {
|
||||||
char *ptr;
|
char *ptr;
|
||||||
|
|
|
@ -230,7 +230,7 @@ static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
|
||||||
size += xdl_recs_copy(xe1, m->i1, m->chg1, needs_cr, 1,
|
size += xdl_recs_copy(xe1, m->i1, m->chg1, needs_cr, 1,
|
||||||
dest ? dest + size : NULL);
|
dest ? dest + size : NULL);
|
||||||
|
|
||||||
if (style == XDL_MERGE_DIFF3) {
|
if (style == XDL_MERGE_DIFF3 || style == XDL_MERGE_ZEALOUS_DIFF3) {
|
||||||
/* Shared preimage */
|
/* Shared preimage */
|
||||||
if (!dest) {
|
if (!dest) {
|
||||||
size += marker_size + 1 + needs_cr + marker3_size;
|
size += marker_size + 1 + needs_cr + marker3_size;
|
||||||
|
@ -322,6 +322,40 @@ static int xdl_fill_merge_buffer(xdfenv_t *xe1, const char *name1,
|
||||||
return size;
|
return size;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static int recmatch(xrecord_t *rec1, xrecord_t *rec2, unsigned long flags)
|
||||||
|
{
|
||||||
|
return xdl_recmatch(rec1->ptr, rec1->size,
|
||||||
|
rec2->ptr, rec2->size, flags);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Remove any common lines from the beginning and end of the conflicted region.
|
||||||
|
*/
|
||||||
|
static void xdl_refine_zdiff3_conflicts(xdfenv_t *xe1, xdfenv_t *xe2, xdmerge_t *m,
|
||||||
|
xpparam_t const *xpp)
|
||||||
|
{
|
||||||
|
xrecord_t **rec1 = xe1->xdf2.recs, **rec2 = xe2->xdf2.recs;
|
||||||
|
for (; m; m = m->next) {
|
||||||
|
/* let's handle just the conflicts */
|
||||||
|
if (m->mode)
|
||||||
|
continue;
|
||||||
|
|
||||||
|
while(m->chg1 && m->chg2 &&
|
||||||
|
recmatch(rec1[m->i1], rec2[m->i2], xpp->flags)) {
|
||||||
|
m->chg1--;
|
||||||
|
m->chg2--;
|
||||||
|
m->i1++;
|
||||||
|
m->i2++;
|
||||||
|
}
|
||||||
|
while (m->chg1 && m->chg2 &&
|
||||||
|
recmatch(rec1[m->i1 + m->chg1 - 1],
|
||||||
|
rec2[m->i2 + m->chg2 - 1], xpp->flags)) {
|
||||||
|
m->chg1--;
|
||||||
|
m->chg2--;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Sometimes, changes are not quite identical, but differ in only a few
|
* Sometimes, changes are not quite identical, but differ in only a few
|
||||||
* lines. Try hard to show only these few lines as conflicting.
|
* lines. Try hard to show only these few lines as conflicting.
|
||||||
|
@ -482,7 +516,22 @@ static int xdl_do_merge(xdfenv_t *xe1, xdchange_t *xscr1,
|
||||||
int style = xmp->style;
|
int style = xmp->style;
|
||||||
int favor = xmp->favor;
|
int favor = xmp->favor;
|
||||||
|
|
||||||
if (style == XDL_MERGE_DIFF3) {
|
/*
|
||||||
|
* XDL_MERGE_DIFF3 does not attempt to refine conflicts by looking
|
||||||
|
* at common areas of sides 1 & 2, because the base (side 0) does
|
||||||
|
* not match and is being shown. Similarly, simplification of
|
||||||
|
* non-conflicts is also skipped due to the skipping of conflict
|
||||||
|
* refinement.
|
||||||
|
*
|
||||||
|
* XDL_MERGE_ZEALOUS_DIFF3, on the other hand, will attempt to
|
||||||
|
* refine conflicts looking for common areas of sides 1 & 2.
|
||||||
|
* However, since the base is being shown and does not match,
|
||||||
|
* it will only look for common areas at the beginning or end
|
||||||
|
* of the conflict block. Since XDL_MERGE_ZEALOUS_DIFF3's
|
||||||
|
* conflict refinement is much more limited in this fashion, the
|
||||||
|
* conflict simplification will be skipped.
|
||||||
|
*/
|
||||||
|
if (style == XDL_MERGE_DIFF3 || style == XDL_MERGE_ZEALOUS_DIFF3) {
|
||||||
/*
|
/*
|
||||||
* "diff3 -m" output does not make sense for anything
|
* "diff3 -m" output does not make sense for anything
|
||||||
* more aggressive than XDL_MERGE_EAGER.
|
* more aggressive than XDL_MERGE_EAGER.
|
||||||
|
@ -603,10 +652,12 @@ static int xdl_do_merge(xdfenv_t *xe1, xdchange_t *xscr1,
|
||||||
if (!changes)
|
if (!changes)
|
||||||
changes = c;
|
changes = c;
|
||||||
/* refine conflicts */
|
/* refine conflicts */
|
||||||
if (XDL_MERGE_ZEALOUS <= level &&
|
if (style == XDL_MERGE_ZEALOUS_DIFF3) {
|
||||||
(xdl_refine_conflicts(xe1, xe2, changes, xpp) < 0 ||
|
xdl_refine_zdiff3_conflicts(xe1, xe2, changes, xpp);
|
||||||
xdl_simplify_non_conflicts(xe1, changes,
|
} else if (XDL_MERGE_ZEALOUS <= level &&
|
||||||
XDL_MERGE_ZEALOUS < level) < 0)) {
|
(xdl_refine_conflicts(xe1, xe2, changes, xpp) < 0 ||
|
||||||
|
xdl_simplify_non_conflicts(xe1, changes,
|
||||||
|
XDL_MERGE_ZEALOUS < level) < 0)) {
|
||||||
xdl_cleanup_merge(changes);
|
xdl_cleanup_merge(changes);
|
||||||
return -1;
|
return -1;
|
||||||
}
|
}
|
||||||
|
|
Loading…
Reference in a new issue