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Long time ago at fab47d05 ("merge: force edit and no-ff mode when
merging a tag object", 2011-11-07), "git merge" was made to always
create a merge commit when merging a tag, even when the side branch
being merged is a descendant of the current branch.
This default is good for merges made by upstream maintainers to
integrate work signed by downstream contributors, but will leave
pointless no-ff merges when downstream contributors pull a newer
release tag to make their long-running topic branches catch up with
the upstream. When there is no local work left on the topic, such a
merge should simply fast-forward to the commit pointed at by the
release tag.
Update the default (again) for "git merge" that merges a tag object
to (1) --no-ff (i.e. create a merge commit even when side branch
fast forwards) if the tag being merged is not at its expected place
in refs/tags/ hierarchy and (2) --ff (i.e. allow fast-forward update
when able) otherwise.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
144 lines
4.9 KiB
Text
144 lines
4.9 KiB
Text
--commit::
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--no-commit::
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Perform the merge and commit the result. This option can
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be used to override --no-commit.
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+
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With --no-commit perform the merge but pretend the merge
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failed and do not autocommit, to give the user a chance to
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inspect and further tweak the merge result before committing.
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--edit::
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-e::
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--no-edit::
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Invoke an editor before committing successful mechanical merge to
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further edit the auto-generated merge message, so that the user
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can explain and justify the merge. The `--no-edit` option can be
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used to accept the auto-generated message (this is generally
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discouraged).
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ifndef::git-pull[]
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The `--edit` (or `-e`) option is still useful if you are
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giving a draft message with the `-m` option from the command line
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and want to edit it in the editor.
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endif::git-pull[]
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+
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Older scripts may depend on the historical behaviour of not allowing the
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user to edit the merge log message. They will see an editor opened when
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they run `git merge`. To make it easier to adjust such scripts to the
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updated behaviour, the environment variable `GIT_MERGE_AUTOEDIT` can be
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set to `no` at the beginning of them.
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--ff::
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When the merge resolves as a fast-forward, only update the branch
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pointer, without creating a merge commit. This is the default
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behavior.
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--no-ff::
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Create a merge commit even when the merge resolves as a
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fast-forward. This is the default behaviour when merging an
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annotated (and possibly signed) tag that is not stored in
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its natural place in 'refs/tags/' hierarchy.
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--ff-only::
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Refuse to merge and exit with a non-zero status unless the
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current `HEAD` is already up to date or the merge can be
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resolved as a fast-forward.
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-S[<keyid>]::
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--gpg-sign[=<keyid>]::
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GPG-sign the resulting merge commit. The `keyid` argument is
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optional and defaults to the committer identity; if specified,
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it must be stuck to the option without a space.
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--log[=<n>]::
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--no-log::
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In addition to branch names, populate the log message with
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one-line descriptions from at most <n> actual commits that are being
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merged. See also linkgit:git-fmt-merge-msg[1].
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+
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With --no-log do not list one-line descriptions from the
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actual commits being merged.
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--signoff::
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--no-signoff::
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Add Signed-off-by line by the committer at the end of the commit
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log message. The meaning of a signoff depends on the project,
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but it typically certifies that committer has
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the rights to submit this work under the same license and
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agrees to a Developer Certificate of Origin
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(see http://developercertificate.org/ for more information).
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+
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With --no-signoff do not add a Signed-off-by line.
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--stat::
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-n::
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--no-stat::
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Show a diffstat at the end of the merge. The diffstat is also
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controlled by the configuration option merge.stat.
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+
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With -n or --no-stat do not show a diffstat at the end of the
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merge.
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--squash::
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--no-squash::
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Produce the working tree and index state as if a real merge
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happened (except for the merge information), but do not actually
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make a commit, move the `HEAD`, or record `$GIT_DIR/MERGE_HEAD`
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(to cause the next `git commit` command to create a merge
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commit). This allows you to create a single commit on top of
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the current branch whose effect is the same as merging another
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branch (or more in case of an octopus).
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+
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With --no-squash perform the merge and commit the result. This
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option can be used to override --squash.
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-s <strategy>::
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--strategy=<strategy>::
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Use the given merge strategy; can be supplied more than
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once to specify them in the order they should be tried.
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If there is no `-s` option, a built-in list of strategies
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is used instead ('git merge-recursive' when merging a single
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head, 'git merge-octopus' otherwise).
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-X <option>::
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--strategy-option=<option>::
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Pass merge strategy specific option through to the merge
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strategy.
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--verify-signatures::
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--no-verify-signatures::
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Verify that the tip commit of the side branch being merged is
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signed with a valid key, i.e. a key that has a valid uid: in the
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default trust model, this means the signing key has been signed by
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a trusted key. If the tip commit of the side branch is not signed
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with a valid key, the merge is aborted.
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--summary::
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--no-summary::
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Synonyms to --stat and --no-stat; these are deprecated and will be
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removed in the future.
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ifndef::git-pull[]
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-q::
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--quiet::
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Operate quietly. Implies --no-progress.
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-v::
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--verbose::
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Be verbose.
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--progress::
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--no-progress::
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Turn progress on/off explicitly. If neither is specified,
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progress is shown if standard error is connected to a terminal.
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Note that not all merge strategies may support progress
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reporting.
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endif::git-pull[]
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--allow-unrelated-histories::
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By default, `git merge` command refuses to merge histories
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that do not share a common ancestor. This option can be
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used to override this safety when merging histories of two
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projects that started their lives independently. As that is
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a very rare occasion, no configuration variable to enable
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this by default exists and will not be added.
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