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#!/bin/sh
#
# This program resolves merge conflicts in git
#
# Copyright (c) 2006 Theodore Y. Ts'o
# Copyright (c) 2009-2016 David Aguilar
#
# This file is licensed under the GPL v2, or a later version
# at the discretion of Junio C Hamano.
#
USAGE='[--tool=tool] [--tool-help] [-y|--no-prompt|--prompt] [-g|--gui|--no-gui] [-O<orderfile>] [file to merge] ...'
SUBDIRECTORY_OK=Yes
NONGIT_OK=Yes
OPTIONS_SPEC=
TOOL_MODE=merge
. git-sh-setup
. git-mergetool--lib
# Returns true if the mode reflects a symlink
is_symlink () {
test "$1" = 120000
}
is_submodule () {
test "$1" = 160000
}
local_present () {
test -n "$local_mode"
}
remote_present () {
test -n "$remote_mode"
}
base_present () {
test -n "$base_mode"
}
mergetool_tmpdir_init () {
if test "$(git config --bool mergetool.writeToTemp)" != true
then
MERGETOOL_TMPDIR=.
return 0
fi
if MERGETOOL_TMPDIR=$(mktemp -d -t "git-mergetool-XXXXXX" 2>/dev/null)
then
return 0
fi
die "error: mktemp is needed when 'mergetool.writeToTemp' is true"
}
cleanup_temp_files () {
if test "$1" = --save-backup
then
rm -rf -- "$MERGED.orig"
test -e "$BACKUP" && mv -- "$BACKUP" "$MERGED.orig"
rm -f -- "$LOCAL" "$REMOTE" "$BASE"
else
rm -f -- "$LOCAL" "$REMOTE" "$BASE" "$BACKUP"
fi
if test "$MERGETOOL_TMPDIR" != "."
then
rmdir "$MERGETOOL_TMPDIR"
fi
}
describe_file () {
mode="$1"
branch="$2"
file="$3"
printf " {%s}: " "$branch"
if test -z "$mode"
then
echo "deleted"
elif is_symlink "$mode"
then
echo "a symbolic link -> '$(cat "$file")'"
elif is_submodule "$mode"
then
echo "submodule commit $file"
elif base_present
then
echo "modified file"
else
echo "created file"
fi
}
resolve_symlink_merge () {
while true
do
printf "Use (l)ocal or (r)emote, or (a)bort? "
read ans || return 1
case "$ans" in
[lL]*)
git checkout-index -f --stage=2 -- "$MERGED"
git add -- "$MERGED"
cleanup_temp_files --save-backup
return 0
;;
[rR]*)
git checkout-index -f --stage=3 -- "$MERGED"
git add -- "$MERGED"
cleanup_temp_files --save-backup
return 0
;;
[aA]*)
return 1
;;
esac
done
}
resolve_deleted_merge () {
while true
do
if base_present
then
printf "Use (m)odified or (d)eleted file, or (a)bort? "
else
printf "Use (c)reated or (d)eleted file, or (a)bort? "
fi
read ans || return 1
case "$ans" in
[mMcC]*)
git add -- "$MERGED"
if test "$merge_keep_backup" = "true"
then
cleanup_temp_files --save-backup
else
cleanup_temp_files
fi
return 0
;;
[dD]*)
git rm -- "$MERGED" > /dev/null
cleanup_temp_files
return 0
;;
[aA]*)
if test "$merge_keep_temporaries" = "false"
then
cleanup_temp_files
fi
return 1
;;
esac
done
}
resolve_submodule_merge () {
while true
do
printf "Use (l)ocal or (r)emote, or (a)bort? "
read ans || return 1
case "$ans" in
[lL]*)
if ! local_present
then
if test -n "$(git ls-tree HEAD -- "$MERGED")"
then
# Local isn't present, but it's a subdirectory
git ls-tree --full-name -r HEAD -- "$MERGED" |
git update-index --index-info || exit $?
else
test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
git update-index --force-remove "$MERGED"
cleanup_temp_files --save-backup
fi
elif is_submodule "$local_mode"
then
stage_submodule "$MERGED" "$local_sha1"
else
git checkout-index -f --stage=2 -- "$MERGED"
git add -- "$MERGED"
fi
return 0
;;
[rR]*)
if ! remote_present
then
if test -n "$(git ls-tree MERGE_HEAD -- "$MERGED")"
then
# Remote isn't present, but it's a subdirectory
git ls-tree --full-name -r MERGE_HEAD -- "$MERGED" |
git update-index --index-info || exit $?
else
test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
git update-index --force-remove "$MERGED"
fi
elif is_submodule "$remote_mode"
then
! is_submodule "$local_mode" &&
test -e "$MERGED" &&
mv -- "$MERGED" "$BACKUP"
stage_submodule "$MERGED" "$remote_sha1"
else
test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
git checkout-index -f --stage=3 -- "$MERGED"
git add -- "$MERGED"
fi
cleanup_temp_files --save-backup
return 0
;;
[aA]*)
return 1
;;
esac
done
}
stage_submodule () {
path="$1"
submodule_sha1="$2"
mkdir -p "$path" ||
die "fatal: unable to create directory for module at $path"
# Find $path relative to work tree
work_tree_root=$(cd_to_toplevel && pwd)
work_rel_path=$(cd "$path" &&
GIT_WORK_TREE="${work_tree_root}" git rev-parse --show-prefix
)
test -n "$work_rel_path" ||
die "fatal: unable to get path of module $path relative to work tree"
git update-index --add --replace --cacheinfo 160000 "$submodule_sha1" "${work_rel_path%/}" || die
}
checkout_staged_file () {
tmpfile="$(git checkout-index --temp --stage="$1" "$2" 2>/dev/null)" &&
tmpfile=${tmpfile%%' '*}
if test $? -eq 0 && test -n "$tmpfile"
then
mv -- "$(git rev-parse --show-cdup)$tmpfile" "$3"
else
>"$3"
fi
}
hide_resolved () {
git merge-file --ours -q -p "$LOCAL" "$BASE" "$REMOTE" >"$LCONFL"
git merge-file --theirs -q -p "$LOCAL" "$BASE" "$REMOTE" >"$RCONFL"
mv -- "$LCONFL" "$LOCAL"
mv -- "$RCONFL" "$REMOTE"
}
merge_file () {
MERGED="$1"
f=$(git ls-files -u -- "$MERGED")
if test -z "$f"
then
if test ! -f "$MERGED"
then
echo "$MERGED: file not found"
else
echo "$MERGED: file does not need merging"
fi
return 1
fi
# extract file extension from the last path component
case "${MERGED##*/}" in
*.*)
ext=.${MERGED##*.}
BASE=${MERGED%"$ext"}
;;
*)
BASE=$MERGED
ext=
esac
initialize_merge_tool "$merge_tool" || return
mergetool_tmpdir_init
if test "$MERGETOOL_TMPDIR" != "."
then
# If we're using a temporary directory then write to the
# top-level of that directory.
BASE=${BASE##*/}
fi
BACKUP="$MERGETOOL_TMPDIR/${BASE}_BACKUP_$$$ext"
LOCAL="$MERGETOOL_TMPDIR/${BASE}_LOCAL_$$$ext"
LCONFL="$MERGETOOL_TMPDIR/${BASE}_LOCAL_LCONFL_$$$ext"
REMOTE="$MERGETOOL_TMPDIR/${BASE}_REMOTE_$$$ext"
RCONFL="$MERGETOOL_TMPDIR/${BASE}_REMOTE_RCONFL_$$$ext"
BASE="$MERGETOOL_TMPDIR/${BASE}_BASE_$$$ext"
base_mode= local_mode= remote_mode=
# here, $IFS is just a LF
for line in $f
do
mode=${line%% *} # 1st word
sha1=${line#"$mode "}
sha1=${sha1%% *} # 2nd word
case "${line#$mode $sha1 }" in # remainder
'1 '*)
base_mode=$mode
;;
'2 '*)
local_mode=$mode local_sha1=$sha1
;;
'3 '*)
remote_mode=$mode remote_sha1=$sha1
;;
esac
done
if is_submodule "$local_mode" || is_submodule "$remote_mode"
then
echo "Submodule merge conflict for '$MERGED':"
describe_file "$local_mode" "local" "$local_sha1"
describe_file "$remote_mode" "remote" "$remote_sha1"
resolve_submodule_merge
return
fi
if test -f "$MERGED"
then
mv -- "$MERGED" "$BACKUP"
cp -- "$BACKUP" "$MERGED"
fi
# Create a parent directory to handle delete/delete conflicts
# where the base's directory no longer exists.
mkdir -p "$(dirname "$MERGED")"
checkout_staged_file 1 "$MERGED" "$BASE"
checkout_staged_file 2 "$MERGED" "$LOCAL"
checkout_staged_file 3 "$MERGED" "$REMOTE"
# hideResolved preferences hierarchy.
global_config="mergetool.hideResolved"
tool_config="mergetool.${merge_tool}.hideResolved"
if enabled=$(git config --type=bool "$tool_config")
then
# The user has a specific preference for a specific tool and no
# other preferences should override that.
: ;
elif enabled=$(git config --type=bool "$global_config")
then
# The user has a general preference for all tools.
#
# 'true' means the user likes the feature so we should use it
# where possible but tool authors can still override.
#
# 'false' means the user doesn't like the feature so we should
# not use it anywhere.
if test "$enabled" = true && hide_resolved_enabled
then
enabled=true
else
enabled=false
fi
else
# The user does not have a preference. Default to disabled.
enabled=false
fi
if test "$enabled" = true
then
hide_resolved
fi
if test -z "$local_mode" || test -z "$remote_mode"
then
echo "Deleted merge conflict for '$MERGED':"
describe_file "$local_mode" "local" "$LOCAL"
describe_file "$remote_mode" "remote" "$REMOTE"
resolve_deleted_merge
status=$?
rmdir -p "$(dirname "$MERGED")" 2>/dev/null
return $status
fi
if is_symlink "$local_mode" || is_symlink "$remote_mode"
then
echo "Symbolic link merge conflict for '$MERGED':"
describe_file "$local_mode" "local" "$LOCAL"
describe_file "$remote_mode" "remote" "$REMOTE"
resolve_symlink_merge
return
fi
echo "Normal merge conflict for '$MERGED':"
describe_file "$local_mode" "local" "$LOCAL"
describe_file "$remote_mode" "remote" "$REMOTE"
if test "$guessed_merge_tool" = true || test "$prompt" = true
then
printf "Hit return to start merge resolution tool (%s): " "$merge_tool"
read ans || return 1
fi
if base_present
then
present=true
else
present=false
fi
if ! run_merge_tool "$merge_tool" "$present"
then
echo "merge of $MERGED failed" 1>&2
mv -- "$BACKUP" "$MERGED"
if test "$merge_keep_temporaries" = "false"
then
cleanup_temp_files
fi
return 1
fi
if test "$merge_keep_backup" = "true"
then
mv -- "$BACKUP" "$MERGED.orig"
else
rm -- "$BACKUP"
fi
git add -- "$MERGED"
cleanup_temp_files
return 0
}
prompt_after_failed_merge () {
while true
do
printf "Continue merging other unresolved paths [y/n]? "
read ans || return 1
case "$ans" in
[yY]*)
return 0
;;
[nN]*)
return 1
;;
esac
done
}
print_noop_and_exit () {
echo "No files need merging"
exit 0
}
main () {
prompt=$(git config --bool mergetool.prompt)
GIT_MERGETOOL_GUI=false
guessed_merge_tool=false
orderfile=
while test $# != 0
do
case "$1" in
--tool-help=*)
TOOL_MODE=${1#--tool-help=}
show_tool_help
;;
--tool-help)
show_tool_help
;;
-t|--tool*)
case "$#,$1" in
*,*=*)
merge_tool=${1#*=}
;;
1,*)
usage ;;
*)
merge_tool="$2"
shift ;;
esac
;;
--no-gui)
GIT_MERGETOOL_GUI=false
;;
-g|--gui)
GIT_MERGETOOL_GUI=true
;;
-y|--no-prompt)
prompt=false
;;
--prompt)
prompt=true
;;
-O*)
orderfile="${1#-O}"
;;
--)
shift
break
;;
-*)
usage
;;
*)
break
;;
esac
shift
done
git_dir_init
require_work_tree
if test -z "$merge_tool"
then
if ! merge_tool=$(get_merge_tool)
then
guessed_merge_tool=true
fi
fi
merge_keep_backup="$(git config --bool mergetool.keepBackup || echo true)"
merge_keep_temporaries="$(git config --bool mergetool.keepTemporaries || echo false)"
prefix=$(git rev-parse --show-prefix) || exit 1
cd_to_toplevel
if test -n "$orderfile"
then
orderfile=$(
git rev-parse --prefix "$prefix" -- "$orderfile" |
sed -e 1d
)
fi
if test $# -eq 0 && test -e "$GIT_DIR/MERGE_RR"
then
set -- $(git rerere remaining)
if test $# -eq 0
then
print_noop_and_exit
fi
elif test $# -ge 0
then
# rev-parse provides the -- needed for 'set'
eval "set $(git rev-parse --sq --prefix "$prefix" -- "$@")"
fi
files=$(git -c core.quotePath=false \
diff --name-only --diff-filter=U \
${orderfile:+"-O$orderfile"} -- "$@")
if test -z "$files"
then
print_noop_and_exit
fi
printf "Merging:\n"
printf "%s\n" "$files"
rc=0
set -- $files
while test $# -ne 0
do
printf "\n"
if ! merge_file "$1"
then
rc=1
test $# -ne 1 && prompt_after_failed_merge || exit 1
fi
shift
done
exit $rc
}
main "$@"