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git-mergetool
#!/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= 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 "$merge_tool" then merge_tool=$(get_merge_tool) subshell_exit_status=$? if test $subshell_exit_status = 1 then guessed_merge_tool=true elif test $subshell_exit_status -gt 1 then exit $subshell_exit_status fi fi merge_keep_backup="$(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 $rc } main "$@"
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