| #!/bin/sh |
| # |
| # Copyright (c) Linus Torvalds, 2005 |
| # |
| # This is the git per-file merge script, called with |
| # |
| # $1 - original file SHA1 (or empty) |
| # $2 - file in branch1 SHA1 (or empty) |
| # $3 - file in branch2 SHA1 (or empty) |
| # $4 - pathname in repository |
| # $5 - original file mode (or empty) |
| # $6 - file in branch1 mode (or empty) |
| # $7 - file in branch2 mode (or empty) |
| # |
| # Handle some trivial cases.. The _really_ trivial cases have |
| # been handled already by git read-tree, but that one doesn't |
| # do any merges that might change the tree layout. |
| |
| case "${1:-.}${2:-.}${3:-.}" in |
| # |
| # Deleted in both or deleted in one and unchanged in the other |
| # |
| "$1.." | "$1.$1" | "$1$1.") |
| if [ "$2" ]; then |
| echo "Removing $4" |
| else |
| # read-tree checked that index matches HEAD already, |
| # so we know we do not have this path tracked. |
| # there may be an unrelated working tree file here, |
| # which we should just leave unmolested. Make sure |
| # we do not have it in the index, though. |
| exec git update-index --remove -- "$4" |
| fi |
| if test -f "$4"; then |
| rm -f -- "$4" && |
| rmdir -p "$(expr "z$4" : 'z\(.*\)/')" 2>/dev/null || : |
| fi && |
| exec git update-index --remove -- "$4" |
| ;; |
| |
| # |
| # Added in one. |
| # |
| ".$2.") |
| # the other side did not add and we added so there is nothing |
| # to be done, except making the path merged. |
| exec git update-index --add --cacheinfo "$6" "$2" "$4" |
| ;; |
| "..$3") |
| echo "Adding $4" |
| if test -f "$4" |
| then |
| echo "ERROR: untracked $4 is overwritten by the merge." |
| exit 1 |
| fi |
| git update-index --add --cacheinfo "$7" "$3" "$4" && |
| exec git checkout-index -u -f -- "$4" |
| ;; |
| |
| # |
| # Added in both, identically (check for same permissions). |
| # |
| ".$3$2") |
| if [ "$6" != "$7" ]; then |
| echo "ERROR: File $4 added identically in both branches," |
| echo "ERROR: but permissions conflict $6->$7." |
| exit 1 |
| fi |
| echo "Adding $4" |
| git update-index --add --cacheinfo "$6" "$2" "$4" && |
| exec git checkout-index -u -f -- "$4" |
| ;; |
| |
| # |
| # Modified in both, but differently. |
| # |
| "$1$2$3" | ".$2$3") |
| |
| case ",$6,$7," in |
| *,120000,*) |
| echo "ERROR: $4: Not merging symbolic link changes." |
| exit 1 |
| ;; |
| *,160000,*) |
| echo "ERROR: $4: Not merging conflicting submodule changes." |
| exit 1 |
| ;; |
| esac |
| |
| src2=`git-unpack-file $3` |
| case "$1" in |
| '') |
| echo "Added $4 in both, but differently." |
| # This extracts OUR file in $orig, and uses git apply to |
| # remove lines that are unique to ours. |
| orig=`git-unpack-file $2` |
| sz0=`wc -c <"$orig"` |
| diff -u -La/$orig -Lb/$orig $orig $src2 | git apply --no-add |
| sz1=`wc -c <"$orig"` |
| |
| # If we do not have enough common material, it is not |
| # worth trying two-file merge using common subsections. |
| expr "$sz0" \< "$sz1" \* 2 >/dev/null || : >$orig |
| ;; |
| *) |
| echo "Auto-merging $4" |
| orig=`git-unpack-file $1` |
| ;; |
| esac |
| |
| # Be careful for funny filename such as "-L" in "$4", which |
| # would confuse "merge" greatly. |
| src1=`git-unpack-file $2` |
| git merge-file "$src1" "$orig" "$src2" |
| ret=$? |
| msg= |
| if [ $ret -ne 0 ]; then |
| msg='content conflict' |
| fi |
| |
| # Create the working tree file, using "our tree" version from the |
| # index, and then store the result of the merge. |
| git checkout-index -f --stage=2 -- "$4" && cat "$src1" >"$4" |
| rm -f -- "$orig" "$src1" "$src2" |
| |
| if [ "$6" != "$7" ]; then |
| if [ -n "$msg" ]; then |
| msg="$msg, " |
| fi |
| msg="${msg}permissions conflict: $5->$6,$7" |
| ret=1 |
| fi |
| if [ "$1" = '' ]; then |
| ret=1 |
| fi |
| |
| if [ $ret -ne 0 ]; then |
| echo "ERROR: $msg in $4" |
| exit 1 |
| fi |
| exec git update-index -- "$4" |
| ;; |
| |
| *) |
| echo "ERROR: $4: Not handling case $1 -> $2 -> $3" |
| ;; |
| esac |
| exit 1 |