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fd66dbf529
If two sides added the same path completely different thing, it is easier to see the merge pivoting on /dev/null. So check the size of the common section we have found, and empty it if it is too small. Signed-off-by: Junio C Hamano <junkio@cox.net>
108 lines
2.4 KiB
Bash
Executable file
108 lines
2.4 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) Linus Torvalds, 2005
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#
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# This is the git per-file merge script, called with
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#
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# $1 - original file SHA1 (or empty)
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# $2 - file in branch1 SHA1 (or empty)
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# $3 - file in branch2 SHA1 (or empty)
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# $4 - pathname in repository
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# $5 - orignal file mode (or empty)
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# $6 - file in branch1 mode (or empty)
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# $7 - file in branch2 mode (or empty)
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#
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# Handle some trivial cases.. The _really_ trivial cases have
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# been handled already by git-read-tree, but that one doesn't
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# do any merges that might change the tree layout.
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case "${1:-.}${2:-.}${3:-.}" in
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#
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# Deleted in both or deleted in one and unchanged in the other
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#
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"$1.." | "$1.$1" | "$1$1.")
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if [ "$2" ]; then
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echo "Removing $4"
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fi
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if test -f "$4"; then
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rm -f -- "$4"
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fi &&
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exec git-update-index --remove -- "$4"
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;;
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#
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# Added in one.
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#
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".$2." | "..$3" )
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echo "Adding $4"
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git-update-index --add --cacheinfo "$6$7" "$2$3" "$4" &&
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exec git-checkout-index -u -f -- "$4"
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;;
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#
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# Added in both, identically (check for same permissions).
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#
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".$3$2")
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if [ "$6" != "$7" ]; then
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echo "ERROR: File $4 added identically in both branches,"
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echo "ERROR: but permissions conflict $6->$7."
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exit 1
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fi
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echo "Adding $4"
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git-update-index --add --cacheinfo "$6" "$2" "$4" &&
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exec git-checkout-index -u -f -- "$4"
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;;
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#
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# Modified in both, but differently.
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#
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"$1$2$3" | ".$2$3")
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src2=`git-unpack-file $3`
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case "$1" in
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'')
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echo "Added $4 in both, but differently."
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# This extracts OUR file in $orig, and uses git-apply to
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# remove lines that are unique to ours.
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orig=`git-unpack-file $2`
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sz0=`wc -c <"$orig"`
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diff -u -La/$orig -Lb/$orig $orig $src2 | git-apply --no-add
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sz1=`wc -c <"$orig"`
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# If we do not have enough common material, it is not
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# worth trying two-file merge using common subsections.
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expr "$sz0" \< "$sz1" \* 2 >/dev/null || : >$orig
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;;
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*)
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echo "Auto-merging $4."
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orig=`git-unpack-file $1`
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;;
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esac
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# We reset the index to the first branch, making
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# git-diff-file useful
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git-update-index --add --cacheinfo "$6" "$2" "$4"
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git-checkout-index -u -f -- "$4" &&
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merge "$4" "$orig" "$src2"
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ret=$?
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rm -f -- "$orig" "$src2"
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if [ "$6" != "$7" ]; then
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echo "ERROR: Permissions conflict: $5->$6,$7."
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ret=1
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fi
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if [ "$1" = '' ]; then
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ret=1
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fi
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if [ $ret -ne 0 ]; then
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echo "ERROR: Merge conflict in $4."
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exit 1
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fi
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exec git-update-index -- "$4"
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;;
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*)
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echo "ERROR: $4: Not handling case $1 -> $2 -> $3"
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;;
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esac
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exit 1
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