X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=git-merge.sh;h=af1f25b3c51d197ea5fd24b7623dfb591f867133;hb=HEAD;hp=d352a3cf65e45e0da0a8ee1989e9acb522e132b5;hpb=069b20a198f171512a1d2d2163b40f70c94f5257;p=git.git diff --git a/git-merge.sh b/git-merge.sh index d352a3cf..af1f25b3 100755 --- a/git-merge.sh +++ b/git-merge.sh @@ -3,19 +3,25 @@ # Copyright (c) 2005 Junio C Hamano # + +USAGE='[-n] [--no-commit] [-s ]... +' . git-sh-setup LF=' ' -usage () { - die "git-merge [-n] [--no-commit] [-s ]... +" -} - all_strategies='recursive octopus resolve stupid ours' -default_strategies='recursive' +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" \ "$GIT_DIR/MERGE_SAVE" || exit 1 @@ -49,8 +55,7 @@ finish () { case "$no_summary" in '') - git-diff-tree -p -M "$head" "$1" | - git-apply --stat --summary + git-diff-tree -p --stat --summary -M "$head" "$1" ;; esac } @@ -88,8 +93,6 @@ do shift done -test "$#" -le 2 && usage ;# we need at least two heads. - merge_msg="$1" shift head_arg="$1" @@ -97,10 +100,36 @@ head=$(git-rev-parse --verify "$1"^0) || usage shift # All the rest are remote heads +test "$#" = 0 && usage ;# we need at least one remote head. + +remoteheads= for remote do - git-rev-parse --verify "$remote"^0 >/dev/null || + remotehead=$(git-rev-parse --verify "$remote"^0) || die "$remote - not something we can merge" + remoteheads="${remoteheads}$remotehead " +done +set x $remoteheads ; shift + +case "$use_strategies" in +'') + case "$#" in + 1) + use_strategies="$default_twohead_strategies" ;; + *) + use_strategies="$default_octopus_strategies" ;; + esac + ;; +esac + +for s in $use_strategies +do + case " $s " in + *" $no_trivial_merge_strategies "*) + index_merge=f + break + ;; + esac done case "$#" in @@ -113,37 +142,42 @@ case "$#" in esac echo "$head" >"$GIT_DIR/ORIG_HEAD" -case "$#,$common,$no_commit" in -*,'',*) +case "$index_merge,$#,$common,$no_commit" in +f,*) + # We've been told not to try anything clever. Skip to real merge. + ;; +?,*,'',*) # No common ancestors found. We need a real merge. ;; -1,"$1",*) +?,1,"$1",*) # If head can reach all the merge then we are up to date. - # but first the most common case of merging one remote + # but first the most common case of merging one remote. echo "Already up-to-date." dropsave exit 0 ;; -1,"$head",*) +?,1,"$head",*) # Again the most common case of merging one remote. - echo "Updating from $head to $1." + echo "Updating from $head to $1" git-update-index --refresh 2>/dev/null new_head=$(git-rev-parse --verify "$1^0") && - git-read-tree -u -m $head "$new_head" && + git-read-tree -u -v -m $head "$new_head" && finish "$new_head" "Fast forward" dropsave exit 0 ;; -1,?*"$LF"?*,*) +?,1,?*"$LF"?*,*) # We are not doing octopus and not fast forward. Need a # real merge. ;; -1,*,) +?,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..." git-update-index --refresh 2>/dev/null - if git-read-tree --trivial -m -u $common $head "$1" && + if git-read-tree --trivial -m -u -v $common $head "$1" && result_tree=$(git-write-tree) then echo "Wonderful." @@ -178,16 +212,8 @@ case "$#,$common,$no_commit" in ;; esac -case "$use_strategies" in -'') - case "$#" in - 1) - use_strategies="$default_strategies" ;; - *) - use_strategies=octopus ;; - esac - ;; -esac +# We are going to make a new commit. +git var GIT_COMMITTER_IDENT >/dev/null || exit # At this point, we need a real merge. No matter what strategy # we use, it would operate on the index, possibly affecting the @@ -208,6 +234,7 @@ case "$use_strategies" in esac result_tree= best_cnt=-1 best_strategy= wt_strategy= +merge_was_ok= for strategy in $use_strategies do test "$wt_strategy" = '' || { @@ -227,6 +254,7 @@ do exit=$? if test "$no_commit" = t && test "$exit" = 0 then + merge_was_ok=t exit=1 ;# pretend it left conflicts. fi @@ -258,11 +286,7 @@ done # auto resolved the merge cleanly. if test '' != "$result_tree" then - parents="-p $head" - for remote - do - parents="$parents -p $remote" - done + parents=$(git-show-branch --independent "$head" "$@" | sed -e 's/^/-p /') result_commit=$(echo "$merge_msg" | git-commit-tree $result_tree $parents) || exit finish "$result_commit" "Merge $result_commit, made by $wt_strategy." dropsave @@ -273,7 +297,8 @@ fi case "$best_strategy" in '') restorestate - die "No merge strategy handled the merge." + echo >&2 "No merge strategy handled the merge." + exit 2 ;; "$wt_strategy") # We already have its result in the working tree. @@ -289,6 +314,25 @@ for remote do echo $remote done >"$GIT_DIR/MERGE_HEAD" -echo $merge_msg >"$GIT_DIR/MERGE_MSG" +echo "$merge_msg" >"$GIT_DIR/MERGE_MSG" -die "Automatic merge failed/prevented; fix up by hand" +if test "$merge_was_ok" = t +then + echo >&2 \ + "Automatic merge went well; stopped before committing as requested" + exit 0 +else + { + echo ' +Conflicts: +' + git ls-files --unmerged | + sed -e 's/^[^ ]* / /' | + uniq + } >>"$GIT_DIR/MERGE_MSG" + if test -d "$GIT_DIR/rr-cache" + then + git-rerere + fi + die "Automatic merge failed; fix conflicts and then commit the result." +fi