# Copyright (c) 2005 Junio C Hamano
#
-USAGE='[-n] [--no-commit] [--squash] [-s <strategy>]... <merge-message> <head> <remote>+'
+USAGE='[-n] [--no-commit] [--squash] [-s <strategy>] [-m=<merge-message>] <commit>+'
+
+SUBDIRECTORY_OK=Yes
. git-sh-setup
+require_work_tree
+cd_to_toplevel
+
+test -z "$(git ls-files -u)" ||
+ die "You are in the middle of a conflicted merge."
LF='
'
-all_strategies='recur recursive recursive-old octopus resolve stupid ours'
+all_strategies='recur recursive octopus resolve stupid ours'
default_twohead_strategies='recursive'
default_octopus_strategies='octopus'
no_trivial_merge_strategies='ours'
use_strategies=
index_merge=t
-if test "@@NO_PYTHON@@"; then
- all_strategies='recur recursive resolve octopus stupid ours'
-fi
dropsave() {
rm -f -- "$GIT_DIR/MERGE_HEAD" "$GIT_DIR/MERGE_MSG" \
restorestate() {
if test -f "$GIT_DIR/MERGE_SAVE"
then
- git reset --hard $head
+ git reset --hard $head >/dev/null
cpio -iuv <"$GIT_DIR/MERGE_SAVE"
git-update-index --refresh >/dev/null
fi
finish () {
if test '' = "$2"
then
- rlogm="$rloga"
+ rlogm="$GIT_REFLOG_ACTION"
else
echo "$2"
- rlogm="$rloga: $2"
+ rlogm="$GIT_REFLOG_ACTION: $2"
fi
case "$squash" in
t)
esac
}
+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]*$') &&
+ git-show-ref -q --verify "refs/heads/$truname" 2>/dev/null
+ then
+ echo "$rh branch '$truname' (early part) of ."
+ else
+ echo "$rh commit '$remote'"
+ fi
+}
+
case "$#" in 0) usage ;; esac
-rloga=
+have_message=
while case "$#" in 0) break ;; esac
do
case "$1" in
die "available strategies are: $all_strategies" ;;
esac
;;
- --reflog-action=*)
- rloga=`expr "z$1" : 'z-[^=]*=\(.*\)'`
+ -m=*|--m=*|--me=*|--mes=*|--mess=*|--messa=*|--messag=*|--message=*)
+ merge_msg=`expr "z$1" : 'z-[^=]*=\(.*\)'`
+ have_message=t
+ ;;
+ -m|--m|--me|--mes|--mess|--messa|--messag|--message)
+ shift
+ case "$#" in
+ 1) usage ;;
+ esac
+ merge_msg="$1"
+ have_message=t
;;
-*) usage ;;
*) break ;;
shift
done
-merge_msg="$1"
-shift
-head_arg="$1"
-head=$(git-rev-parse --verify "$1"^0) || usage
-shift
+# This could be traditional "merge <msg> HEAD <commit>..." and the
+# way we can tell it is to see if the second token is HEAD, but some
+# people might have misused the interface and used a committish that
+# is the same as HEAD there instead. Traditional format never would
+# have "-m" so it is an additional safety measure to check for it.
+
+if test -z "$have_message" &&
+ second_token=$(git-rev-parse --verify "$2^0" 2>/dev/null) &&
+ head_commit=$(git-rev-parse --verify "HEAD" 2>/dev/null) &&
+ test "$second_token" = "$head_commit"
+then
+ merge_msg="$1"
+ shift
+ head_arg="$1"
+ shift
+elif ! git-rev-parse --verify HEAD >/dev/null 2>&1
+then
+ # If the merged head is a valid one there is no reason to
+ # forbid "git merge" into a branch yet to be born. We do
+ # the same for "git pull".
+ if test 1 -ne $#
+ then
+ echo >&2 "Can merge only exactly one commit into empty head"
+ exit 1
+ fi
+
+ rh=$(git rev-parse --verify "$1^0") ||
+ die "$1 - not something we can merge"
+
+ git-update-ref -m "initial pull" HEAD "$rh" "" &&
+ git-read-tree --reset -u HEAD
+ exit
+
+else
+ # We are invoked directly as the first-class UI.
+ head_arg=HEAD
+
+ # All the rest are the commits being merged; prepare
+ # the standard merge summary message to be appended to
+ # 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=$(for remote
+ do
+ merge_name "$remote"
+ done | git-fmt-merge-msg
+ )
+ merge_msg="${merge_msg:+$merge_msg$LF$LF}$merge_name"
+fi
+head=$(git-rev-parse --verify "$head_arg"^0) || usage
# All the rest are remote heads
test "$#" = 0 && usage ;# we need at least one remote head.
-test "$rloga" = '' && rloga="merge: $@"
+set_reflog_action "merge $*"
remoteheads=
for remote
do
- remotehead=$(git-rev-parse --verify "$remote"^0) ||
+ remotehead=$(git-rev-parse --verify "$remote"^0 2>/dev/null) ||
die "$remote - not something we can merge"
remoteheads="${remoteheads}$remotehead "
+ eval GITHEAD_$remotehead='"$remote"'
+ export GITHEAD_$remotehead
done
set x $remoteheads ; shift
'')
case "$#" in
1)
- use_strategies="$default_twohead_strategies" ;;
+ var="`git-config --get pull.twohead`"
+ if test -n "$var"
+ then
+ use_strategies="$var"
+ else
+ use_strategies="$default_twohead_strategies"
+ fi ;;
*)
- use_strategies="$default_octopus_strategies" ;;
+ var="`git-config --get pull.octopus`"
+ if test -n "$var"
+ then
+ use_strategies="$var"
+ else
+ use_strategies="$default_octopus_strategies"
+ fi ;;
esac
;;
esac
echo "Updating $(git-rev-parse --short $head)..$(git-rev-parse --short $1)"
git-update-index --refresh 2>/dev/null
new_head=$(git-rev-parse --verify "$1^0") &&
- git-read-tree -u -v -m $head "$new_head" &&
+ git-read-tree -v -m -u --exclude-per-directory=.gitignore $head "$new_head" &&
finish "$new_head" "Fast forward"
dropsave
exit 0
;;
?,1,*,)
# We are not doing octopus, not fast forward, and have only
- # one common. See if it is really trivial.
- git var GIT_COMMITTER_IDENT >/dev/null || exit
-
- echo "Trying really trivial in-index merge..."
+ # one common.
git-update-index --refresh 2>/dev/null
- if git-read-tree --trivial -m -u -v $common $head "$1" &&
- result_tree=$(git-write-tree)
- then
- echo "Wonderful."
- result_commit=$(
- echo "$merge_msg" |
- git-commit-tree $result_tree -p HEAD -p "$1"
- ) || exit
- finish "$result_commit" "In-index merge"
- dropsave
- exit 0
- fi
- echo "Nope."
+ case " $use_strategies " in
+ *' recursive '*|*' recur '*)
+ : run merge later
+ ;;
+ *)
+ # See if it is really trivial.
+ git var GIT_COMMITTER_IDENT >/dev/null || exit
+ echo "Trying really trivial in-index merge..."
+ if git-read-tree --trivial -m -u -v $common $head "$1" &&
+ result_tree=$(git-write-tree)
+ then
+ echo "Wonderful."
+ result_commit=$(
+ echo "$merge_msg" |
+ git-commit-tree $result_tree -p HEAD -p "$1"
+ ) || exit
+ finish "$result_commit" "In-index merge"
+ dropsave
+ exit 0
+ fi
+ echo "Nope."
+ esac
;;
*)
# An octopus. If we can reach all the remote we are up to date.
case "$best_strategy" in
'')
restorestate
- echo >&2 "No merge strategy handled the merge."
+ case "$use_strategies" in
+ ?*' '?*)
+ echo >&2 "No merge strategy handled the merge."
+ ;;
+ *)
+ echo >&2 "Merge with strategy $use_strategies failed."
+ ;;
+ esac
exit 2
;;
"$wt_strategy")