name : git-merge-one-file #!/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) # $7 - file in branch2 mode (or empty) # # Handle some trivial cases.. The _really_ trivial cases have # been handled already by git read-tree, but that one doesn't # do any merges that might change the tree layout. USAGE='<orig blob> <our blob> <their blob> <path>' USAGE="$USAGE <orig mode> <our mode> <their mode>" LONG_USAGE="usage: git merge-one-file $USAGE Blob ids and modes should be empty for missing files." SUBDIRECTORY_OK=Yes . git-sh-setup cd_to_toplevel require_work_tree if test $# != 7 then echo "$LONG_USAGE" exit 1 fi case "${1:-.}${2:-.}${3:-.}" in # # Deleted in both or deleted in one and unchanged in the other # "$1.." | "$1.$1" | "$1$1.") if { test -z "$6" && test "$5" != "$7"; } || { test -z "$7" && test "$5" != "$6"; } then echo "ERROR: File $4 deleted on one branch but had its" >&2 echo "ERROR: permissions changed on the other." >&2 exit 1 fi if test -n "$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." >&2 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 test "$6" != "$7" then echo "ERROR: File $4 added identically in both branches," >&2 echo "ERROR: but permissions conflict $6->$7." >&2 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." >&2 exit 1 ;; *,160000,*) echo "ERROR: $4: Not merging conflicting submodule changes." >&2 exit 1 ;; esac src1=$(git unpack-file $2) src2=$(git unpack-file $3) case "$1" in '') echo "Added $4 in both, but differently." orig=$(git unpack-file $(git hash-object /dev/null)) ;; *) echo "Auto-merging $4" orig=$(git unpack-file $1) ;; esac git merge-file "$src1" "$orig" "$src2" ret=$? msg= if test $ret != 0 || test -z "$1" then msg='content conflict' ret=1 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" >"$4" || exit 1 rm -f -- "$orig" "$src1" "$src2" if test "$6" != "$7" then if test -n "$msg" then msg="$msg, " fi msg="${msg}permissions conflict: $5->$6,$7" ret=1 fi if test $ret != 0 then echo "ERROR: $msg in $4" >&2 exit 1 fi exec git update-index -- "$4" ;; *) echo "ERROR: $4: Not handling case $1 -> $2 -> $3" >&2 ;; esac exit 1