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executable file 87 lines (75 sloc) 1.732 kB
#!/bin/sh
#
# Copyright (c) 2005 Junio C Hamano
#
# Resolve two or more trees.
#
# The first parameters up to -- are merge bases; the rest are heads.
bases= head= remotes= sep_seen=
for arg
do
case ",$sep_seen,$head,$arg," in
*,--,)
sep_seen=yes
;;
,yes,,*)
head=$arg
;;
,yes,*)
remotes="$remotes$arg "
;;
*)
bases="$bases$arg "
;;
esac
done
# Reject if this is not an Octopus -- resolve should be used instead.
case "$remotes" in
?*' '?*)
;;
*)
exit 2 ;;
esac
# MRC is the current "merge reference commit"
# MRT is the current "merge result tree"
MRC=$head MSG= PARENT="-p $head"
MRT=$(git-write-tree)
CNT=1 ;# counting our head
NON_FF_MERGE=0
for SHA1 in $remotes
do
common=$(git-merge-base $MRC $SHA1) ||
die "Unable to find common commit with $SHA1"
if test "$common" = $SHA1
then
echo "Already up-to-date with $SHA1"
continue
fi
CNT=`expr $CNT + 1`
PARENT="$PARENT -p $SHA1"
if test "$common,$NON_FF_MERGE" = "$MRC,0"
then
# The first head being merged was a fast-forward.
# Advance MRC to the head being merged, and use that
# tree as the intermediate result of the merge.
# We still need to count this as part of the parent set.
echo "Fast forwarding to: $SHA1"
git-read-tree -u -m $head $SHA1 || exit
MRC=$SHA1 MRT=$(git-write-tree)
continue
fi
NON_FF_MERGE=1
echo "Trying simple merge with $SHA1"
git-read-tree -u -m $common $MRT $SHA1 || exit 2
next=$(git-write-tree 2>/dev/null)
if test $? -ne 0
then
echo "Simple merge did not work, trying automatic merge."
git-merge-index -o git-merge-one-file -a ||
exit 2 ; # Automatic merge failed; should not be doing Octopus
next=$(git-write-tree 2>/dev/null)
fi
MRC=$common
MRT=$next
done
exit 0
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