log add list of one-line log to merge commit message
squash create a single commit instead of doing a merge
commit perform a commit if the merge succeeds (default)
-ff allow fast forward (default)
+ff allow fast-forward (default)
+ff-only abort if fast-forward is not possible
+rerere-autoupdate update index with any reused conflict resolution
s,strategy= merge strategy to use
+X= option for selected merge strategy
m,message= message to be used for the merge commit (if any)
"
cd_to_toplevel
test -z "$(git ls-files -u)" ||
- die "You are in the middle of a conflicted merge."
+ die "Merge is not possible because you have unmerged files."
+
+! test -e "$GIT_DIR/MERGE_HEAD" ||
+ die 'You have not concluded your merge (MERGE_HEAD exists).'
LF='
'
all_strategies='recur recursive octopus resolve stupid ours subtree'
+all_strategies="$all_strategies recursive-ours recursive-theirs"
+not_strategies='base file index tree'
default_twohead_strategies='recursive'
default_octopus_strategies='octopus'
no_fast_forward_strategies='subtree ours'
-no_trivial_strategies='recursive recur subtree ours'
+no_trivial_strategies='recursive recur subtree ours recursive-ours recursive-theirs'
use_strategies=
+xopt=
allow_fast_forward=t
+fast_forward_only=
allow_trivial_merge=t
-squash= no_commit= log_arg=
+squash= no_commit= log_arg= rr_arg=
dropsave() {
rm -f -- "$GIT_DIR/MERGE_HEAD" "$GIT_DIR/MERGE_MSG" \
- "$GIT_DIR/MERGE_STASH" || exit 1
+ "$GIT_DIR/MERGE_STASH" "$GIT_DIR/MERGE_MODE" || exit 1
}
savestate() {
merge_name () {
remote="$1"
rh=$(git rev-parse --verify "$remote^0" 2>/dev/null) || return
- bh=$(git show-ref -s --verify "refs/heads/$remote" 2>/dev/null)
- if test "$rh" = "$bh"
- then
- echo "$rh branch '$remote' of ."
- elif truname=$(expr "$remote" : '\(.*\)~[1-9][0-9]*$') &&
+ if truname=$(expr "$remote" : '\(.*\)~[0-9]*$') &&
git show-ref -q --verify "refs/heads/$truname" 2>/dev/null
then
echo "$rh branch '$truname' (early part) of ."
- elif test "$remote" = "FETCH_HEAD" -a -r "$GIT_DIR/FETCH_HEAD"
+ return
+ fi
+ if found_ref=$(git rev-parse --symbolic-full-name --verify \
+ "$remote" 2>/dev/null)
+ then
+ expanded=$(git check-ref-format --branch "$remote") ||
+ exit
+ if test "${found_ref#refs/heads/}" != "$found_ref"
+ then
+ echo "$rh branch '$expanded' of ."
+ return
+ elif test "${found_ref#refs/remotes/}" != "$found_ref"
+ then
+ echo "$rh remote branch '$expanded' of ."
+ return
+ fi
+ fi
+ if test "$remote" = "FETCH_HEAD" -a -r "$GIT_DIR/FETCH_HEAD"
then
sed -e 's/ not-for-merge / /' -e 1q \
"$GIT_DIR/FETCH_HEAD"
- else
- echo "$rh commit '$remote'"
+ return
fi
+ echo "$rh commit '$remote'"
}
parse_config () {
--no-ff)
test "$squash" != t ||
die "You cannot combine --squash with --no-ff."
+ test "$fast_forward_only" != t ||
+ die "You cannot combine --ff-only with --no-ff."
allow_fast_forward=f ;;
+ --ff-only)
+ test "$allow_fast_forward" != f ||
+ die "You cannot combine --ff-only with --no-ff."
+ fast_forward_only=t ;;
+ --rerere-autoupdate|--no-rerere-autoupdate)
+ rr_arg=$1 ;;
-s|--strategy)
shift
case " $all_strategies " in
*" $1 "*)
- use_strategies="$use_strategies$1 " ;;
+ use_strategies="$use_strategies$1 "
+ ;;
*)
- die "available strategies are: $all_strategies" ;;
+ case " $not_strategies " in
+ *" $1 "*)
+ false
+ esac &&
+ type "git-merge-$1" >/dev/null 2>&1 ||
+ die "available strategies are: $all_strategies"
+ use_strategies="$use_strategies$1 "
+ ;;
esac
;;
+ -X)
+ shift
+ xopt="${xopt:+$xopt }$(git rev-parse --sq-quote "--$1")"
+ ;;
-m|--message)
shift
merge_msg="$1"
exit 1
fi
+ test "$squash" != t ||
+ die "Squash commit into empty head not supported yet"
+ test "$allow_fast_forward" = t ||
+ die "Non-fast-forward into an empty head does not make sense"
rh=$(git rev-parse --verify "$1^0") ||
die "$1 - not something we can merge"
# the given message. If remote is invalid we will die
# later in the common codepath so we discard the error
# in this loop.
- merge_name=$(for remote
+ merge_msg="$(
+ for remote
do
merge_name "$remote"
- done | git fmt-merge-msg $log_arg
- )
- merge_msg="${merge_msg:+$merge_msg$LF$LF}$merge_name"
+ done |
+ if test "$have_message" = t
+ then
+ git fmt-merge-msg -m "$merge_msg" $log_arg
+ else
+ git fmt-merge-msg $log_arg
+ fi
+ )"
fi
head=$(git rev-parse --verify "$head_arg"^0) || usage
common=$(git merge-base --all $head "$@")
;;
*)
- common=$(git show-branch --merge-base $head "$@")
+ common=$(git merge-base --all --octopus $head "$@")
;;
esac
echo "$head" >"$GIT_DIR/ORIG_HEAD"
# Again the most common case of merging one remote.
echo "Updating $(git rev-parse --short $head)..$(git rev-parse --short $1)"
git update-index --refresh 2>/dev/null
- msg="Fast forward"
+ msg="Fast-forward"
if test -n "$have_message"
then
msg="$msg (no commit created; -m option ignored)"
exit 0
;;
?,1,?*"$LF"?*,*)
- # We are not doing octopus and not fast forward. Need a
+ # We are not doing octopus and not fast-forward. Need a
# real merge.
;;
?,1,*,)
- # We are not doing octopus, not fast forward, and have only
+ # We are not doing octopus, not fast-forward, and have only
# one common.
git update-index --refresh 2>/dev/null
- case "$allow_trivial_merge" in
- t)
+ case "$allow_trivial_merge,$fast_forward_only" in
+ t,)
# See if it is really trivial.
git var GIT_COMMITTER_IDENT >/dev/null || exit
echo "Trying really trivial in-index merge..."
;;
esac
+if test "$fast_forward_only" = t
+then
+ die "Not possible to fast-forward, aborting."
+fi
+
# We are going to make a new commit.
git var GIT_COMMITTER_IDENT >/dev/null || exit
# Remember which strategy left the state in the working tree
wt_strategy=$strategy
- git-merge-$strategy $common -- "$head_arg" "$@"
+ eval 'git-merge-$strategy '"$xopt"' $common -- "$head_arg" "$@"'
exit=$?
if test "$no_commit" = t && test "$exit" = 0
then
then
if test "$allow_fast_forward" = "t"
then
- parents=$(git show-branch --independent "$head" "$@")
+ parents=$(git merge-base --independent "$head" "$@")
else
- parents=$(git rev-parse "$head" "$@")
+ parents=$(git rev-parse "$head" "$@")
fi
parents=$(echo "$parents" | sed -e 's/^/-p /')
result_commit=$(printf '%s\n' "$merge_msg" | git commit-tree $result_tree $parents) || exit
do
echo $remote
done >"$GIT_DIR/MERGE_HEAD"
- printf '%s\n' "$merge_msg" >"$GIT_DIR/MERGE_MSG"
+ printf '%s\n' "$merge_msg" >"$GIT_DIR/MERGE_MSG" ||
+ die "Could not write to $GIT_DIR/MERGE_MSG"
+ if test "$allow_fast_forward" != t
+ then
+ printf "%s" no-ff
+ else
+ :
+ fi >"$GIT_DIR/MERGE_MODE" ||
+ die "Could not write to $GIT_DIR/MERGE_MODE"
fi
if test "$merge_was_ok" = t
sed -e 's/^[^ ]* / /' |
uniq
} >>"$GIT_DIR/MERGE_MSG"
- git rerere
+ git rerere $rr_arg
die "Automatic merge failed; fix conflicts and then commit the result."
fi