diff options
Diffstat (limited to 'git-merge.sh')
| -rwxr-xr-x | git-merge.sh | 142 |
1 files changed, 118 insertions, 24 deletions
diff --git a/git-merge.sh b/git-merge.sh index a9cfafb1d..3eef048ef 100755 --- a/git-merge.sh +++ b/git-merge.sh @@ -3,23 +3,25 @@ # 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>+' + . git-sh-setup +set_reflog_action "merge $*" +require_work_tree + +test -z "$(git ls-files -u)" || + die "You are in a middle of conflicted merge." LF=' ' -all_strategies='recursive 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='resolve octopus stupid ours' - default_twohead_strategies='resolve' -fi dropsave() { rm -f -- "$GIT_DIR/MERGE_HEAD" "$GIT_DIR/MERGE_MSG" \ @@ -35,7 +37,7 @@ savestate() { 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 @@ -60,10 +62,10 @@ squash_message () { 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) @@ -94,7 +96,25 @@ finish () { esac } -rloga= +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 "$#" in 0) usage ;; esac + +have_message= while case "$#" in 0) break ;; esac do case "$1" in @@ -124,8 +144,17 @@ do 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 ;; @@ -133,22 +162,68 @@ do 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: $@" remoteheads= for remote do - remotehead=$(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 $remoteheads ; shift @@ -156,9 +231,21 @@ case "$use_strategies" in '') case "$#" in 1) - use_strategies="$default_twohead_strategies" ;; + var="`git-repo-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-repo-config --get pull.octopus`" + if test -n "$var" + then + use_strategies="$var" + else + use_strategies="$default_octopus_strategies" + fi ;; esac ;; esac @@ -198,10 +285,10 @@ f,*) ;; ?,1,"$head",*) # Again the most common case of merging one remote. - echo "Updating from $head to $1" + 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 "$new_head" "Fast forward" dropsave exit 0 @@ -336,7 +423,14 @@ fi case "$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") |