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3ec62ad9ff
Signed-off-by: Elijah Newren <newren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
115 lines
2.4 KiB
Bash
Executable file
115 lines
2.4 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2005 Junio C Hamano
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#
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# Resolve two or more trees.
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#
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LF='
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'
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die () {
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echo >&2 "$*"
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exit 1
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}
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# The first parameters up to -- are merge bases; the rest are heads.
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bases= head= remotes= sep_seen=
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for arg
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do
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case ",$sep_seen,$head,$arg," in
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*,--,)
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sep_seen=yes
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;;
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,yes,,*)
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head=$arg
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;;
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,yes,*)
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remotes="$remotes$arg "
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;;
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*)
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bases="$bases$arg "
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;;
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esac
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done
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# Reject if this is not an Octopus -- resolve should be used instead.
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case "$remotes" in
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?*' '?*)
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;;
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*)
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exit 2 ;;
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esac
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# MRC is the current "merge reference commit"
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# MRT is the current "merge result tree"
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if ! git diff-index --quiet --cached HEAD --
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then
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echo "Error: Your local changes to the following files would be overwritten by merge"
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git diff-index --cached --name-only HEAD -- | sed -e 's/^/ /'
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exit 2
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fi
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MRC=$(git rev-parse --verify -q $head)
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MRT=$(git write-tree)
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NON_FF_MERGE=0
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OCTOPUS_FAILURE=0
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for SHA1 in $remotes
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do
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case "$OCTOPUS_FAILURE" in
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1)
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# We allow only last one to have a hand-resolvable
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# conflicts. Last round failed and we still had
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# a head to merge.
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echo "Automated merge did not work."
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echo "Should not be doing an Octopus."
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exit 2
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esac
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eval pretty_name=\${GITHEAD_$SHA1:-$SHA1}
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if test "$SHA1" = "$pretty_name"
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then
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SHA1_UP="$(echo "$SHA1" | tr a-z A-Z)"
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eval pretty_name=\${GITHEAD_$SHA1_UP:-$pretty_name}
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fi
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common=$(git merge-base --all $SHA1 $MRC) ||
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die "Unable to find common commit with $pretty_name"
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case "$LF$common$LF" in
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*"$LF$SHA1$LF"*)
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echo "Already up-to-date with $pretty_name"
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continue
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;;
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esac
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if test "$common,$NON_FF_MERGE" = "$MRC,0"
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then
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# The first head being merged was a fast-forward.
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# Advance MRC to the head being merged, and use that
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# tree as the intermediate result of the merge.
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# We still need to count this as part of the parent set.
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echo "Fast-forwarding to: $pretty_name"
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git read-tree -u -m $head $SHA1 || exit
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MRC=$SHA1 MRT=$(git write-tree)
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continue
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fi
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NON_FF_MERGE=1
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echo "Trying simple merge with $pretty_name"
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git read-tree -u -m --aggressive $common $MRT $SHA1 || exit 2
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next=$(git write-tree 2>/dev/null)
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if test $? -ne 0
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then
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echo "Simple merge did not work, trying automatic merge."
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git-merge-index -o git-merge-one-file -a ||
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OCTOPUS_FAILURE=1
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next=$(git write-tree 2>/dev/null)
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fi
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MRC="$MRC $SHA1"
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MRT=$next
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done
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exit "$OCTOPUS_FAILURE"
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