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This can only resolve two heads (i.e. the current branch
and another branch you pulled from) using 3-way merge
algorithm. It tries to carefully detect criss-cross
merge ambiguities and is considered generally safe and
This can only resolve two heads using 3-way merge
algorithm. When there are more than one common
ancestors that can be used for 3-way merge, it creates a
merged tree of the common ancestors and uses that as
the reference tree for the 3-way merge. This has been
reported to result in fewer merge conflicts without
causing mis-merges by tests done on actual merge commits
taken from Linux 2.6 kernel development history.
Additionally this can detect and handle merges involving
renames. This is the default merge strategy when
pulling or merging one branch.
This resolves more than two-head case, but refuses to do
complex merge that needs manual resolution. It is
primarily meant to be used for bundling topic branch
heads together. This is the default merge strategy when
pulling or merging more than one branches.
This resolves any number of heads, but the result of the
merge is always the current branch head. It is meant to
be used to supersede old development history of side
This is a modified recursive strategy. When merging trees A and
B, if B corresponds to a subtree of A, B is first adjusted to
match the tree structure of A, instead of reading the trees at
the same level. This adjustment is also done to the common
ancestor tree.