# 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] [-y|--no-prompt|--prompt] [file to merge] ...'
+USAGE='[--tool=tool] [--tool-help] [-y|--no-prompt|--prompt] [-O<orderfile>] [file to merge] ...'
SUBDIRECTORY_OK=Yes
+NONGIT_OK=Yes
OPTIONS_SPEC=
TOOL_MODE=merge
. git-sh-setup
. git-mergetool--lib
-require_work_tree
# Returns true if the mode reflects a symlink
is_symlink () {
- test "$1" = 120000
+ test "$1" = 120000
}
is_submodule () {
- test "$1" = 160000
+ test "$1" = 160000
}
local_present () {
- test -n "$local_mode"
+ test -n "$local_mode"
}
remote_present () {
- test -n "$remote_mode"
+ test -n "$remote_mode"
}
base_present () {
- test -n "$base_mode"
+ 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 "$1" = --save-backup
+ then
+ rm -rf -- "$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"
- else
- if base_present; then
- echo "modified 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 $file"
+ elif base_present
+ then
+ echo "modified file"
else
- echo "created file"
+ echo "created file"
fi
- fi
}
-
resolve_symlink_merge () {
- while true; do
- printf "Use (l)ocal or (r)emote, or (a)bort? "
- read ans || return 1
- case "$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
+ 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 -- "$MERGED"
- cleanup_temp_files --save-backup
- return 0
- ;;
- [dD]*)
- git rm -- "$MERGED" > /dev/null
- cleanup_temp_files
- return 0
- ;;
- [aA]*)
- return 1
- ;;
- esac
+ 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 "$MERGED"
+ while true
+ do
+ printf "Use (l)ocal or (r)emote, or (a)bort? "
+ read ans || return 1
+ case "$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 -- "$MERGED"
+ fi
cleanup_temp_files --save-backup
- fi
- elif is_submodule "$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
+ 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
+ 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" "${work_rel_path%/}" || die
}
checkout_staged_file () {
- tmpfile=$(expr \
- "$(git checkout-index --temp --stage="$1" "$2" 2>/dev/null)" \
- : '\([^ ]*\) ')
-
- if test $? -eq 0 -a -n "$tmpfile" ; then
- mv -- "$(git rev-parse --show-cdup)$tmpfile" "$3"
- else
- >"$3"
- fi
+ tmpfile=$(expr \
+ "$(git checkout-index --temp --stage="$1" "$2" 2>/dev/null)" \
+ : '\([^ ]*\) ')
+
+ if test $? -eq 0 && test -n "$tmpfile"
+ then
+ mv -- "$(git rev-parse --show-cdup)$tmpfile" "$3"
+ else
+ >"$3"
+ fi
}
merge_file () {
- MERGED="$1"
+ 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 "$MERGED: file does not need merging"
+ fi
+ return 1
+ fi
- f=$(git ls-files -u -- "$MERGED")
- if test -z "$f" ; then
- if test ! -f "$MERGED" ; then
- echo "$MERGED: file not found"
+ if BASE=$(expr "$MERGED" : '\(.*\)\.[^/]*$')
+ then
+ ext=$(expr "$MERGED" : '.*\(\.[^/]*\)$')
else
- echo "$MERGED: file does not need merging"
+ BASE=$MERGED
+ ext=
fi
- return 1
- fi
-
- ext="$$$(expr "$MERGED" : '.*\(\.[^/]*\)$')"
- BACKUP="./$MERGED.BACKUP.$ext"
- LOCAL="./$MERGED.LOCAL.$ext"
- REMOTE="./$MERGED.REMOTE.$ext"
- BASE="./$MERGED.BASE.$ext"
-
- base_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==1) print $1;}')
- local_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==2) print $1;}')
- remote_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==3) print $1;}')
-
- if is_submodule "$local_mode" || is_submodule "$remote_mode"; then
- echo "Submodule merge conflict for '$MERGED':"
- local_sha1=$(git ls-files -u -- "$MERGED" | awk '{if ($3==2) print $2;}')
- remote_sha1=$(git ls-files -u -- "$MERGED" | awk '{if ($3==3) print $2;}')
- describe_file "$local_mode" "local" "$local_sha1"
- describe_file "$remote_mode" "remote" "$remote_sha1"
- resolve_submodule_merge
- return
- fi
-
- mv -- "$MERGED" "$BACKUP"
- cp -- "$BACKUP" "$MERGED"
-
- checkout_staged_file 1 "$MERGED" "$BASE"
- checkout_staged_file 2 "$MERGED" "$LOCAL"
- checkout_staged_file 3 "$MERGED" "$REMOTE"
-
- if test -z "$local_mode" -o -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
- return
- fi
- if is_symlink "$local_mode" || is_symlink "$remote_mode"; then
- echo "Symbolic link merge conflict for '$MERGED':"
+ mergetool_tmpdir_init
+
+ if test "$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"
+ REMOTE="$MERGETOOL_TMPDIR/${BASE}_REMOTE_$$$ext"
+ BASE="$MERGETOOL_TMPDIR/${BASE}_BASE_$$$ext"
+
+ base_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==1) print $1;}')
+ local_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==2) print $1;}')
+ remote_mode=$(git ls-files -u -- "$MERGED" | awk '{if ($3==3) print $1;}')
+
+ if is_submodule "$local_mode" || is_submodule "$remote_mode"
+ then
+ echo "Submodule merge conflict for '$MERGED':"
+ local_sha1=$(git ls-files -u -- "$MERGED" | awk '{if ($3==2) print $2;}')
+ remote_sha1=$(git ls-files -u -- "$MERGED" | awk '{if ($3==3) print $2;}')
+ describe_file "$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"
+
+ 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" "$REMOTE"
- resolve_symlink_merge
- return
- fi
-
- echo "Normal merge conflict for '$MERGED':"
- describe_file "$local_mode" "local" "$LOCAL"
- describe_file "$remote_mode" "remote" "$REMOTE"
- if "$prompt" = true; then
- printf "Hit return to start merge resolution tool (%s): " "$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
+ if test "$guessed_merge_tool" = true || test "$prompt" = true
+ then
+ printf "Hit return to start merge resolution tool (%s): " "$merge_tool"
+ read ans || return 1
+ fi
+
+ if base_present
+ then
+ present=true
+ else
+ present=false
fi
- return 1
- fi
+ if ! run_merge_tool "$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
+ if test "$merge_keep_backup" = "true"
+ then
+ mv -- "$BACKUP" "$MERGED.orig"
+ else
+ rm -- "$BACKUP"
+ fi
- git add -- "$MERGED"
- cleanup_temp_files
- return 0
+ git add -- "$MERGED"
+ cleanup_temp_files
+ return 0
}
-prompt=$(git config --bool mergetool.prompt || echo true)
-
-while test $# != 0
-do
- case "$1" in
- -t|--tool*)
- case "$#,$1" in
- *,*=*)
- merge_tool=$(expr "z$1" : 'z-[^=]*=\(.*\)')
- ;;
- 1,*)
- usage ;;
+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)
+ 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 "$#,$1" in
+ *,*=*)
+ merge_tool=$(expr "z$1" : 'z-[^=]*=\(.*\)')
+ ;;
+ 1,*)
+ usage ;;
+ *)
+ merge_tool="$2"
+ shift ;;
+ esac
+ ;;
+ -y|--no-prompt)
+ prompt=false
+ ;;
+ --prompt)
+ prompt=true
+ ;;
+ -O*)
+ orderfile="${1#-O}"
+ ;;
+ --)
+ shift
+ break
+ ;;
+ -*)
+ usage
+ ;;
*)
- merge_tool="$2"
- shift ;;
- esac
- ;;
- -y|--no-prompt)
- prompt=false
- ;;
- --prompt)
- prompt=true
- ;;
- --)
- shift
- break
- ;;
- -*)
- usage
- ;;
- *)
- break
- ;;
- esac
- shift
-done
-
-prompt_after_failed_merge() {
- while true; do
- printf "Continue merging other unresolved paths (y/n) ? "
- read ans || return 1
- case "$ans" in
-
- [yY]*)
- return 0
- ;;
+ break
+ ;;
+ esac
+ shift
+ done
- [nN]*)
- return 1
- ;;
- esac
- done
+ git_dir_init
+ require_work_tree
+
+ if test -z "$merge_tool"
+ then
+ # Check if a merge tool has been configured
+ merge_tool=$(get_configured_merge_tool)
+ # Try to guess an appropriate merge tool if no tool has been set.
+ if test -z "$merge_tool"
+ then
+ merge_tool=$(guess_merge_tool) || exit
+ 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
+ for i in $files
+ do
+ printf "\n"
+ if ! merge_file "$i"
+ then
+ rc=1
+ prompt_after_failed_merge || exit 1
+ fi
+ done
+
+ exit $rc
}
-if test -z "$merge_tool"; then
- merge_tool=$(get_merge_tool "$merge_tool") || exit
-fi
-merge_keep_backup="$(git config --bool mergetool.keepBackup || echo true)"
-merge_keep_temporaries="$(git config --bool mergetool.keepTemporaries || echo false)"
-
-last_status=0
-rollup_status=0
-files=
-
-if test $# -eq 0 ; then
- cd_to_toplevel
-
- if test -e "$GIT_DIR/MERGE_RR"
- then
- files=$(git rerere remaining)
- else
- files=$(git ls-files -u | sed -e 's/^[^ ]* //' | sort -u)
- fi
-else
- files=$(git ls-files -u -- "$@" | sed -e 's/^[^ ]* //' | sort -u)
-fi
-
-if test -z "$files" ; then
- echo "No files need merging"
- exit 0
-fi
-
-printf "Merging:\n"
-printf "$files\n"
-
-IFS='
-'
-for i in $files
-do
- if test $last_status -ne 0; then
- prompt_after_failed_merge || exit 1
- fi
- printf "\n"
- merge_file "$i"
- last_status=$?
- if test $last_status -ne 0; then
- rollup_status=1
- fi
-done
-
-exit $rollup_status
+main "$@"