diff options
Diffstat (limited to 'git-merge-one-file.sh')
| -rwxr-xr-x | git-merge-one-file.sh | 90 |
1 files changed, 58 insertions, 32 deletions
diff --git a/git-merge-one-file.sh b/git-merge-one-file.sh index e1eb963266..424b034e34 100755 --- a/git-merge-one-file.sh +++ b/git-merge-one-file.sh @@ -16,12 +16,38 @@ # 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 [ "$2" ]; then + 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 $4" else # read-tree checked that index matches HEAD already, @@ -31,7 +57,8 @@ case "${1:-.}${2:-.}${3:-.}" in # we do not have it in the index, though. exec git update-index --remove -- "$4" fi - if test -f "$4"; then + if test -f "$4" + then rm -f -- "$4" && rmdir -p "$(expr "z$4" : 'z\(.*\)/')" 2>/dev/null || : fi && @@ -50,7 +77,7 @@ case "${1:-.}${2:-.}${3:-.}" in echo "Adding $4" if test -f "$4" then - echo "ERROR: untracked $4 is overwritten by the merge." + echo "ERROR: untracked $4 is overwritten by the merge." >&2 exit 1 fi git update-index --add --cacheinfo "$7" "$3" "$4" && @@ -61,9 +88,10 @@ case "${1:-.}${2:-.}${3:-.}" in # 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." + 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 $4" @@ -78,64 +106,62 @@ case "${1:-.}${2:-.}${3:-.}" in case ",$6,$7," in *,120000,*) - echo "ERROR: $4: Not merging symbolic link changes." + echo "ERROR: $4: Not merging symbolic link changes." >&2 exit 1 ;; *,160000,*) - echo "ERROR: $4: Not merging conflicting submodule changes." + echo "ERROR: $4: Not merging conflicting submodule changes." >&2 exit 1 ;; esac - src2=`git-unpack-file $3` + src1=$(git-unpack-file $2) + src2=$(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 || : >$orig + orig=$(git-unpack-file e69de29bb2d1d6434b8b29ae775ad8c2e48c5391) ;; *) echo "Auto-merging $4" - orig=`git-unpack-file $1` + orig=$(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 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" + git checkout-index -f --stage=2 -- "$4" && cat "$src1" >"$4" || exit 1 rm -f -- "$orig" "$src1" "$src2" - if [ "$6" != "$7" ]; then - echo "ERROR: Permissions conflict: $5->$6,$7." - ret=1 - fi - if [ "$1" = '' ]; then + if test "$6" != "$7" + then + if test -n "$msg" + then + msg="$msg, " + fi + msg="${msg}permissions conflict: $5->$6,$7" ret=1 fi - if [ $ret -ne 0 ]; then - echo "ERROR: Merge conflict in $4" + 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" + echo "ERROR: $4: Not handling case $1 -> $2 -> $3" >&2 ;; esac exit 1 |