+
+: ${MERGE_TOOLS_DIR=$(git --exec-path)/mergetools}
+
+mode_ok () {
+ if diff_mode
+ then
+ can_diff
+ elif merge_mode
+ then
+ can_merge
+ else
+ false
+ fi
+}
+
+is_available () {
+ merge_tool_path=$(translate_merge_tool_path "$1") &&
+ type "$merge_tool_path" >/dev/null 2>&1
+}
+
+list_config_tools () {
+ section=$1
+ line_prefix=${2:-}
+
+ git config --get-regexp $section'\..*\.cmd' |
+ while read -r key value
+ do
+ toolname=${key#$section.}
+ toolname=${toolname%.cmd}
+
+ printf "%s%s\n" "$line_prefix" "$toolname"
+ done
+}
+
+show_tool_names () {
+ condition=${1:-true} per_line_prefix=${2:-} preamble=${3:-}
+ not_found_msg=${4:-}
+ extra_content=${5:-}
+
+ shown_any=
+ ( cd "$MERGE_TOOLS_DIR" && ls ) | {
+ while read toolname
+ do
+ if setup_tool "$toolname" 2>/dev/null &&
+ (eval "$condition" "$toolname")
+ then
+ if test -n "$preamble"
+ then
+ printf "%s\n" "$preamble"
+ preamble=
+ fi
+ shown_any=yes
+ printf "%s%s\n" "$per_line_prefix" "$toolname"
+ fi
+ done
+
+ if test -n "$extra_content"
+ then
+ if test -n "$preamble"
+ then
+ # Note: no '\n' here since we don't want a
+ # blank line if there is no initial content.
+ printf "%s" "$preamble"
+ preamble=
+ fi
+ shown_any=yes
+ printf "\n%s\n" "$extra_content"
+ fi
+
+ if test -n "$preamble" && test -n "$not_found_msg"
+ then
+ printf "%s\n" "$not_found_msg"
+ fi
+
+ test -n "$shown_any"
+ }
+}
+