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ec245ba049
Some merge tools cannot cope when $LOCAL, $BASE, or $REMOTE are missing. $BASE can be missing when two branches independently add the same filename. Provide an empty file to make these tools happy. When a delete/modify conflict occurs, $LOCAL and $REMOTE can also be missing. We have special case code to handle such case so this change may not affect that codepath, but try to be consistent and create an empty file for them anyway. Reported-by: Jason Wenger <jcwenger@gmail.com> Signed-off-by: David Aguilar <davvid@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
387 lines
8.4 KiB
Bash
Executable file
387 lines
8.4 KiB
Bash
Executable file
#!/bin/sh
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#
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# This program resolves merge conflicts in git
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#
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# Copyright (c) 2006 Theodore Y. Ts'o
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#
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# This file is licensed under the GPL v2, or a later version
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# at the discretion of Junio C Hamano.
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#
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USAGE='[--tool=tool] [-y|--no-prompt|--prompt] [file to merge] ...'
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SUBDIRECTORY_OK=Yes
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OPTIONS_SPEC=
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TOOL_MODE=merge
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. git-sh-setup
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. git-mergetool--lib
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require_work_tree
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# Returns true if the mode reflects a symlink
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is_symlink () {
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test "$1" = 120000
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}
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is_submodule () {
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test "$1" = 160000
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}
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local_present () {
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test -n "$local_mode"
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}
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remote_present () {
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test -n "$remote_mode"
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}
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base_present () {
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test -n "$base_mode"
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}
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cleanup_temp_files () {
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if test "$1" = --save-backup ; then
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rm -rf -- "$MERGED.orig"
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test -e "$BACKUP" && mv -- "$BACKUP" "$MERGED.orig"
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rm -f -- "$LOCAL" "$REMOTE" "$BASE"
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else
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rm -f -- "$LOCAL" "$REMOTE" "$BASE" "$BACKUP"
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fi
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}
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describe_file () {
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mode="$1"
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branch="$2"
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file="$3"
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printf " {%s}: " "$branch"
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if test -z "$mode"; then
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echo "deleted"
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elif is_symlink "$mode" ; then
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echo "a symbolic link -> '$(cat "$file")'"
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elif is_submodule "$mode" ; then
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echo "submodule commit $file"
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else
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if base_present; then
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echo "modified file"
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else
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echo "created file"
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fi
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fi
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}
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resolve_symlink_merge () {
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while true; do
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printf "Use (l)ocal or (r)emote, or (a)bort? "
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read ans || return 1
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case "$ans" in
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[lL]*)
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git checkout-index -f --stage=2 -- "$MERGED"
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git add -- "$MERGED"
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cleanup_temp_files --save-backup
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return 0
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;;
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[rR]*)
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git checkout-index -f --stage=3 -- "$MERGED"
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git add -- "$MERGED"
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cleanup_temp_files --save-backup
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return 0
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;;
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[aA]*)
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return 1
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;;
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esac
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done
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}
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resolve_deleted_merge () {
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while true; do
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if base_present; then
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printf "Use (m)odified or (d)eleted file, or (a)bort? "
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else
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printf "Use (c)reated or (d)eleted file, or (a)bort? "
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fi
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read ans || return 1
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case "$ans" in
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[mMcC]*)
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git add -- "$MERGED"
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cleanup_temp_files --save-backup
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return 0
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;;
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[dD]*)
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git rm -- "$MERGED" > /dev/null
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cleanup_temp_files
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return 0
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;;
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[aA]*)
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return 1
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;;
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esac
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done
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}
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resolve_submodule_merge () {
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while true; do
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printf "Use (l)ocal or (r)emote, or (a)bort? "
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read ans || return 1
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case "$ans" in
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[lL]*)
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if ! local_present; then
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if test -n "$(git ls-tree HEAD -- "$MERGED")"; then
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# Local isn't present, but it's a subdirectory
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git ls-tree --full-name -r HEAD -- "$MERGED" | git update-index --index-info || exit $?
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else
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test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
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git update-index --force-remove "$MERGED"
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cleanup_temp_files --save-backup
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fi
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elif is_submodule "$local_mode"; then
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stage_submodule "$MERGED" "$local_sha1"
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else
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git checkout-index -f --stage=2 -- "$MERGED"
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git add -- "$MERGED"
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fi
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return 0
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;;
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[rR]*)
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if ! remote_present; then
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if test -n "$(git ls-tree MERGE_HEAD -- "$MERGED")"; then
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# Remote isn't present, but it's a subdirectory
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git ls-tree --full-name -r MERGE_HEAD -- "$MERGED" | git update-index --index-info || exit $?
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else
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test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
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git update-index --force-remove "$MERGED"
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fi
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elif is_submodule "$remote_mode"; then
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! is_submodule "$local_mode" && test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
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stage_submodule "$MERGED" "$remote_sha1"
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else
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test -e "$MERGED" && mv -- "$MERGED" "$BACKUP"
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git checkout-index -f --stage=3 -- "$MERGED"
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git add -- "$MERGED"
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fi
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cleanup_temp_files --save-backup
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return 0
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;;
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[aA]*)
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return 1
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;;
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esac
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done
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}
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stage_submodule () {
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path="$1"
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submodule_sha1="$2"
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mkdir -p "$path" || die "fatal: unable to create directory for module at $path"
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# Find $path relative to work tree
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work_tree_root=$(cd_to_toplevel && pwd)
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work_rel_path=$(cd "$path" && GIT_WORK_TREE="${work_tree_root}" git rev-parse --show-prefix)
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test -n "$work_rel_path" || die "fatal: unable to get path of module $path relative to work tree"
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git update-index --add --replace --cacheinfo 160000 "$submodule_sha1" "${work_rel_path%/}" || die
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}
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checkout_staged_file () {
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tmpfile=$(expr \
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"$(git checkout-index --temp --stage="$1" "$2" 2>/dev/null)" \
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: '\([^ ]*\) ')
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if test $? -eq 0 -a -n "$tmpfile" ; then
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mv -- "$(git rev-parse --show-cdup)$tmpfile" "$3"
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else
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>"$3"
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fi
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}
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merge_file () {
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MERGED="$1"
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f=$(git ls-files -u -- "$MERGED")
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if test -z "$f" ; then
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if test ! -f "$MERGED" ; then
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echo "$MERGED: file not found"
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else
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echo "$MERGED: file does not need merging"
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fi
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return 1
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fi
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ext="$$$(expr "$MERGED" : '.*\(\.[^/]*\)$')"
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BACKUP="./$MERGED.BACKUP.$ext"
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LOCAL="./$MERGED.LOCAL.$ext"
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REMOTE="./$MERGED.REMOTE.$ext"
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BASE="./$MERGED.BASE.$ext"
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base_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==1) print $1;}')
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local_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==2) print $1;}')
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remote_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==3) print $1;}')
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if is_submodule "$local_mode" || is_submodule "$remote_mode"; then
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echo "Submodule merge conflict for '$MERGED':"
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local_sha1=$(git ls-files -u -- "$MERGED" | awk '{if ($3==2) print $2;}')
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remote_sha1=$(git ls-files -u -- "$MERGED" | awk '{if ($3==3) print $2;}')
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describe_file "$local_mode" "local" "$local_sha1"
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describe_file "$remote_mode" "remote" "$remote_sha1"
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resolve_submodule_merge
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return
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fi
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mv -- "$MERGED" "$BACKUP"
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cp -- "$BACKUP" "$MERGED"
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checkout_staged_file 1 "$MERGED" "$BASE"
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checkout_staged_file 2 "$MERGED" "$LOCAL"
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checkout_staged_file 3 "$MERGED" "$REMOTE"
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if test -z "$local_mode" -o -z "$remote_mode"; then
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echo "Deleted merge conflict for '$MERGED':"
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describe_file "$local_mode" "local" "$LOCAL"
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describe_file "$remote_mode" "remote" "$REMOTE"
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resolve_deleted_merge
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return
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fi
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if is_symlink "$local_mode" || is_symlink "$remote_mode"; then
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echo "Symbolic link merge conflict for '$MERGED':"
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describe_file "$local_mode" "local" "$LOCAL"
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describe_file "$remote_mode" "remote" "$REMOTE"
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resolve_symlink_merge
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return
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fi
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echo "Normal merge conflict for '$MERGED':"
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describe_file "$local_mode" "local" "$LOCAL"
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describe_file "$remote_mode" "remote" "$REMOTE"
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if "$prompt" = true; then
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printf "Hit return to start merge resolution tool (%s): " "$merge_tool"
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read ans || return 1
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fi
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if base_present; then
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present=true
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else
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present=false
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fi
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if ! run_merge_tool "$merge_tool" "$present"; then
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echo "merge of $MERGED failed" 1>&2
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mv -- "$BACKUP" "$MERGED"
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if test "$merge_keep_temporaries" = "false"; then
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cleanup_temp_files
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fi
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return 1
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fi
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if test "$merge_keep_backup" = "true"; then
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mv -- "$BACKUP" "$MERGED.orig"
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else
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rm -- "$BACKUP"
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fi
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git add -- "$MERGED"
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cleanup_temp_files
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return 0
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}
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prompt=$(git config --bool mergetool.prompt || echo true)
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while test $# != 0
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do
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case "$1" in
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-t|--tool*)
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case "$#,$1" in
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*,*=*)
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merge_tool=$(expr "z$1" : 'z-[^=]*=\(.*\)')
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;;
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1,*)
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usage ;;
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*)
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merge_tool="$2"
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shift ;;
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esac
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;;
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-y|--no-prompt)
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prompt=false
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;;
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--prompt)
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prompt=true
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;;
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--)
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shift
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break
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;;
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-*)
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usage
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;;
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*)
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break
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;;
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esac
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shift
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done
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prompt_after_failed_merge() {
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while true; do
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printf "Continue merging other unresolved paths (y/n) ? "
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read ans || return 1
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case "$ans" in
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[yY]*)
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return 0
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;;
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[nN]*)
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return 1
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;;
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esac
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done
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}
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if test -z "$merge_tool"; then
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merge_tool=$(get_merge_tool "$merge_tool") || exit
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fi
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merge_keep_backup="$(git config --bool mergetool.keepBackup || echo true)"
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merge_keep_temporaries="$(git config --bool mergetool.keepTemporaries || echo false)"
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last_status=0
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rollup_status=0
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files=
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if test $# -eq 0 ; then
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cd_to_toplevel
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if test -e "$GIT_DIR/MERGE_RR"
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then
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files=$(git rerere remaining)
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else
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files=$(git ls-files -u | sed -e 's/^[^ ]* //' | sort -u)
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fi
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else
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files=$(git ls-files -u -- "$@" | sed -e 's/^[^ ]* //' | sort -u)
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fi
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if test -z "$files" ; then
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echo "No files need merging"
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exit 0
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fi
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printf "Merging:\n"
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printf "$files\n"
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IFS='
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'
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for i in $files
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do
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if test $last_status -ne 0; then
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prompt_after_failed_merge || exit 1
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fi
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printf "\n"
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merge_file "$i"
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last_status=$?
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if test $last_status -ne 0; then
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rollup_status=1
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fi
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done
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exit $rollup_status
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