git checkout --merge --conflict=diff3 can be used to present conflict hunks including text from the common ancestor. The added information can be helpful for resolving a merge by hand, and merge tools tend to understand it because it is very similar to what ‘diff3 -m’ produces. Unlike current git, diff3 -m includes a label for the merge base on the ||||||| line, and unfortunately, some tools cannot parse the conflict hunks without it. Humans can benefit from a cue when learning to interpreting the format, too. Mark the start of the text from the old branch with a label based on the branch’s name. git rerere does not have trouble parsing this output and its preimage ids are unchanged since it includes its own code for recreating conflict hunks. No other code in git tries to parse conflict hunks. Requested-by: Stefan Monnier <monnier@xxxxxxxxxxxxxxxx> Signed-off-by: Jonathan Nieder <jrnieder@xxxxxxxxx> --- Unchanged. builtin/checkout.c | 1 + t/t7201-co.sh | 2 +- 2 files changed, 2 insertions(+), 1 deletions(-) diff --git a/builtin/checkout.c b/builtin/checkout.c index d652b4c..88b1f43 100644 --- a/builtin/checkout.c +++ b/builtin/checkout.c @@ -439,6 +439,7 @@ static int merge_working_tree(struct checkout_opts *opts, ret = reset_tree(new->commit->tree, opts, 1); if (ret) return ret; + o.ancestor = old->name; o.branch1 = new->name; o.branch2 = "local"; merge_trees(&o, new->commit->tree, work, diff --git a/t/t7201-co.sh b/t/t7201-co.sh index f3f0c4c..1337fa5 100755 --- a/t/t7201-co.sh +++ b/t/t7201-co.sh @@ -209,7 +209,7 @@ test_expect_success 'checkout --merge --conflict=diff3 <branch>' ' a c e - ||||||| + ||||||| master a b c -- 1.7.0 -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html