409 lines
9.0 KiB
Bash
Executable File
409 lines
9.0 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] [file to merge] ...'
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SUBDIRECTORY_OK=Yes
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OPTIONS_SPEC=
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. git-sh-setup
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require_work_tree
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prefix=$(git rev-parse --show-prefix)
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# Returns true if the mode reflects a symlink
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is_symlink () {
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test "$1" = 120000
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}
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local_present () {
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test -n "$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 "$1" = --save-backup ; then
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mv -- "$BACKUP" "$path.orig"
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rm -f -- "$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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else
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if base_present; then
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echo "modified"
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else
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echo "created"
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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
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case "$ans" in
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[lL]*)
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git checkout-index -f --stage=2 -- "$path"
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git add -- "$path"
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cleanup_temp_files --save-backup
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return
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;;
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[rR]*)
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git checkout-index -f --stage=3 -- "$path"
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git add -- "$path"
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cleanup_temp_files --save-backup
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return
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;;
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[aA]*)
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exit 1
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;;
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esac
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done
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}
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resolve_deleted_merge () {
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while true; do
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if base_present; then
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printf "Use (m)odified or (d)eleted file, or (a)bort? "
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else
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printf "Use (c)reated or (d)eleted file, or (a)bort? "
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fi
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read ans
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case "$ans" in
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[mMcC]*)
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git add -- "$path"
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cleanup_temp_files --save-backup
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return
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;;
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[dD]*)
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git rm -- "$path" > /dev/null
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cleanup_temp_files
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return
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;;
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[aA]*)
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exit 1
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;;
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esac
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done
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}
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check_unchanged () {
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if test "$path" -nt "$BACKUP" ; then
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status=0;
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else
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while true; do
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echo "$path seems unchanged."
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printf "Was the merge successful? [y/n] "
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read answer < /dev/tty
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case "$answer" in
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y*|Y*) status=0; break ;;
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n*|N*) status=1; break ;;
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esac
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done
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fi
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}
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save_backup () {
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if test "$status" -eq 0; then
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mv -- "$BACKUP" "$path.orig"
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fi
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}
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remove_backup () {
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if test "$status" -eq 0; then
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rm "$BACKUP"
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fi
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}
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merge_file () {
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path="$1"
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f=`git ls-files -u -- "$path"`
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if test -z "$f" ; then
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if test ! -f "$path" ; then
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echo "$path: file not found"
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else
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echo "$path: file does not need merging"
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fi
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exit 1
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fi
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BACKUP="$path.BACKUP.$$"
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LOCAL="$path.LOCAL.$$"
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REMOTE="$path.REMOTE.$$"
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BASE="$path.BASE.$$"
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mv -- "$path" "$BACKUP"
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cp -- "$BACKUP" "$path"
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base_mode=`git ls-files -u -- "$path" | awk '{if ($3==1) print $1;}'`
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local_mode=`git ls-files -u -- "$path" | awk '{if ($3==2) print $1;}'`
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remote_mode=`git ls-files -u -- "$path" | awk '{if ($3==3) print $1;}'`
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base_present && git cat-file blob ":1:$prefix$path" >"$BASE" 2>/dev/null
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local_present && git cat-file blob ":2:$prefix$path" >"$LOCAL" 2>/dev/null
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remote_present && git cat-file blob ":3:$prefix$path" >"$REMOTE" 2>/dev/null
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if test -z "$local_mode" -o -z "$remote_mode"; then
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echo "Deleted merge conflict for '$path':"
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describe_file "$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 "$remote_mode"; then
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echo "Symbolic link merge conflict for '$path':"
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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 '$path':"
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describe_file "$local_mode" "local" "$LOCAL"
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describe_file "$remote_mode" "remote" "$REMOTE"
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printf "Hit return to start merge resolution tool (%s): " "$merge_tool"
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read ans
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case "$merge_tool" in
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kdiff3)
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if base_present ; then
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("$merge_tool_path" --auto --L1 "$path (Base)" --L2 "$path (Local)" --L3 "$path (Remote)" \
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-o "$path" -- "$BASE" "$LOCAL" "$REMOTE" > /dev/null 2>&1)
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else
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("$merge_tool_path" --auto --L1 "$path (Local)" --L2 "$path (Remote)" \
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-o "$path" -- "$LOCAL" "$REMOTE" > /dev/null 2>&1)
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fi
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status=$?
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remove_backup
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;;
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tkdiff)
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if base_present ; then
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"$merge_tool_path" -a "$BASE" -o "$path" -- "$LOCAL" "$REMOTE"
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else
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"$merge_tool_path" -o "$path" -- "$LOCAL" "$REMOTE"
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fi
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status=$?
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save_backup
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;;
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meld|vimdiff)
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touch "$BACKUP"
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"$merge_tool_path" -- "$LOCAL" "$path" "$REMOTE"
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check_unchanged
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save_backup
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;;
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gvimdiff)
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touch "$BACKUP"
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"$merge_tool_path" -f -- "$LOCAL" "$path" "$REMOTE"
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check_unchanged
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save_backup
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;;
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xxdiff)
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touch "$BACKUP"
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if base_present ; then
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"$merge_tool_path" -X --show-merged-pane \
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-R 'Accel.SaveAsMerged: "Ctrl-S"' \
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-R 'Accel.Search: "Ctrl+F"' \
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-R 'Accel.SearchForward: "Ctrl-G"' \
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--merged-file "$path" -- "$LOCAL" "$BASE" "$REMOTE"
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else
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"$merge_tool_path" -X --show-merged-pane \
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-R 'Accel.SaveAsMerged: "Ctrl-S"' \
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-R 'Accel.Search: "Ctrl+F"' \
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-R 'Accel.SearchForward: "Ctrl-G"' \
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--merged-file "$path" -- "$LOCAL" "$REMOTE"
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fi
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check_unchanged
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save_backup
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;;
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opendiff)
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touch "$BACKUP"
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if base_present; then
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"$merge_tool_path" "$LOCAL" "$REMOTE" -ancestor "$BASE" -merge "$path" | cat
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else
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"$merge_tool_path" "$LOCAL" "$REMOTE" -merge "$path" | cat
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fi
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check_unchanged
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save_backup
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;;
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ecmerge)
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touch "$BACKUP"
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if base_present; then
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"$merge_tool_path" "$BASE" "$LOCAL" "$REMOTE" --mode=merge3 --to="$path"
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else
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"$merge_tool_path" "$LOCAL" "$REMOTE" --mode=merge2 --to="$path"
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fi
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check_unchanged
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save_backup
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;;
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emerge)
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if base_present ; then
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"$merge_tool_path" -f emerge-files-with-ancestor-command "$LOCAL" "$REMOTE" "$BASE" "$(basename "$path")"
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else
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"$merge_tool_path" -f emerge-files-command "$LOCAL" "$REMOTE" "$(basename "$path")"
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fi
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status=$?
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save_backup
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;;
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esac
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if test "$status" -ne 0; then
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echo "merge of $path failed" 1>&2
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mv -- "$BACKUP" "$path"
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exit 1
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fi
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git add -- "$path"
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cleanup_temp_files
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}
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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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--)
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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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valid_tool() {
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case "$1" in
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kdiff3 | tkdiff | xxdiff | meld | opendiff | emerge | vimdiff | gvimdiff | ecmerge)
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;; # happy
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*)
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return 1
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;;
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esac
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}
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init_merge_tool_path() {
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merge_tool_path=`git config mergetool.$1.path`
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if test -z "$merge_tool_path" ; then
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case "$1" in
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emerge)
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merge_tool_path=emacs
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;;
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*)
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merge_tool_path=$1
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;;
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esac
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fi
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}
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if test -z "$merge_tool"; then
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merge_tool=`git config merge.tool`
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if test -n "$merge_tool" && ! valid_tool "$merge_tool"; then
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echo >&2 "git config option merge.tool set to unknown tool: $merge_tool"
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echo >&2 "Resetting to default..."
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unset merge_tool
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fi
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fi
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if test -z "$merge_tool" ; then
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if test -n "$DISPLAY"; then
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merge_tool_candidates="kdiff3 tkdiff xxdiff meld gvimdiff"
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if test -n "$GNOME_DESKTOP_SESSION_ID" ; then
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merge_tool_candidates="meld $merge_tool_candidates"
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fi
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if test "$KDE_FULL_SESSION" = "true"; then
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merge_tool_candidates="kdiff3 $merge_tool_candidates"
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fi
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fi
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if echo "${VISUAL:-$EDITOR}" | grep 'emacs' > /dev/null 2>&1; then
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merge_tool_candidates="$merge_tool_candidates emerge"
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fi
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if echo "${VISUAL:-$EDITOR}" | grep 'vim' > /dev/null 2>&1; then
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merge_tool_candidates="$merge_tool_candidates vimdiff"
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fi
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merge_tool_candidates="$merge_tool_candidates opendiff emerge vimdiff"
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echo "merge tool candidates: $merge_tool_candidates"
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for i in $merge_tool_candidates; do
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init_merge_tool_path $i
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if type "$merge_tool_path" > /dev/null 2>&1; then
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merge_tool=$i
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break
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fi
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done
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if test -z "$merge_tool" ; then
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echo "No known merge resolution program available."
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exit 1
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fi
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else
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if ! valid_tool "$merge_tool"; then
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echo >&2 "Unknown merge_tool $merge_tool"
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exit 1
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fi
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init_merge_tool_path "$merge_tool"
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if ! type "$merge_tool_path" > /dev/null 2>&1; then
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echo "The merge tool $merge_tool is not available as '$merge_tool_path'"
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exit 1
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fi
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fi
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if test $# -eq 0 ; then
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files=`git ls-files -u | sed -e 's/^[^ ]* //' | sort -u`
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if test -z "$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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echo Merging the files: $files
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git ls-files -u | sed -e 's/^[^ ]* //' | sort -u | while read i
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do
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printf "\n"
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merge_file "$i" < /dev/tty > /dev/tty
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done
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else
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while test $# -gt 0; do
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printf "\n"
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merge_file "$1"
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shift
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done
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fi
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exit 0
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