bench, docs: let the client detect readiness; say what Enter commits

bench.sh copied ipcpath() and the IBus address-file discovery into shell,
although the benchmark client only speaks IPC; retrying the client itself
is the readiness test. It also forwarded arguments to a daemon that takes
exactly one. README claimed Enter confirms the selection, but Enter and Tab
commit the reading unless a candidate was moved to.

README.md

@@ -18,10 +18,10 @@ Vietnamese Telex is also available as a compatibility mode.
 
 Use `Up`/`Down` to move through candidates and `PageUp`/`PageDown` to move by
 nine without wrapping. An unmodified `1`-`9` selects that row on the current
-page. `Enter` confirms the selection, and `0` commits the current reading
-without conversion. `Tab` confirms an ordinary candidate; in a temporary
-Emoji or Hanja search, `Tab` and `Shift-Tab` wrap through the results. `Esc`
-cancels composition.
+page. `Enter` and `Tab` commit a candidate you have moved to; otherwise they
+commit the reading, as `0` always does. In a temporary Emoji or Hanja search,
+`Enter` commits the highlighted result and `Tab`/`Shift-Tab` wrap through
+the results. `Esc` cancels composition.
 
 Hiragana mode composes a complete reading before offering Kanji candidates.
 Katakana mode does not perform Kanji conversion. Emoji and Hanja searches

bench.sh

@@ -4,18 +4,8 @@ set -eu
 
 cd "$(dirname "$0")" || exit 1
 
-case ${XDG_RUNTIME_DIR-} in
-/)	ipc=/strans.sock ;;
-/*/)	ipc=${XDG_RUNTIME_DIR}strans.sock ;;
-/*)	ipc=${XDG_RUNTIME_DIR}/strans.sock ;;
-*)	ipc=/tmp/strans.$(id -u) ;;
-esac
-if test -n "${XDG_CONFIG_HOME-}"; then
-	busdir=$XDG_CONFIG_HOME/ibus/bus
-elif test "${HOME+x}" = x; then
-	busdir=$HOME/.config/ibus/bus
-else
-	echo "bench.sh: HOME or XDG_CONFIG_HOME is required for IBus discovery" >&2
+if test "$#" -ne 0; then
+	echo "usage: bench.sh" >&2
 	exit 1
 fi
 
@@ -29,70 +19,36 @@ cleanup()
 	if test -n "$perf_pid"; then
 		kill -INT "$perf_pid" 2>/dev/null || :
 		wait "$perf_pid" 2>/dev/null || :
-		perf_pid=
 	fi
 	if test -n "$strans_pid"; then
 		kill "$strans_pid" 2>/dev/null || :
 		wait "$strans_pid" 2>/dev/null || :
-		strans_pid=
 	fi
 	exit "$status"
 }
 
-ibusready()
-{
-	for address in "$busdir"/*; do
-		test -f "$address" || continue
-		foundpid=
-		foundaddress=
-		while IFS= read -r line; do
-			case $line in
-			IBUS_DAEMON_PID="$strans_pid")	foundpid=1 ;;
-			IBUS_ADDRESS=unix:abstract=strans-"$strans_pid",*)	foundaddress=1 ;;
-			esac
-		done <"$address"
-		if test -n "$foundpid" && test -n "$foundaddress"; then
-			return 0
-		fi
-	done
-	return 1
-}
-
 trap cleanup 0
 trap 'exit 129' 1
 trap 'exit 130' 2
 trap 'exit 143' 15
 
-./strans map "$@" &
+./strans map &
 strans_pid=$!
 
+# The daemon is ready once the benchmark client can complete a round.
 attempt=0
-while test "$attempt" -lt 10; do
-	if test -S "$ipc" && ibusready; then
-		break
-	fi
+until ./bench/bench bench/bench.keys 1 >/dev/null 2>&1; do
 	if ! kill -0 "$strans_pid" 2>/dev/null; then
-		if wait "$strans_pid"; then
-			status=0
-		else
-			status=$?
-		fi
-		strans_pid=
-		if test "$status" -eq 0; then
-			status=1
-		fi
-		echo "bench.sh: daemon exited before publishing IPC and IBus endpoints" >&2
-		exit "$status"
-	fi
-	attempt=$((attempt + 1))
-	if test "$attempt" -lt 10; then
-		sleep 1
-	fi
-done
-if test "$attempt" -eq 10; then
-	echo "bench.sh: daemon did not publish IPC and IBus endpoints within 10 seconds" >&2
+		echo "bench.sh: daemon exited before accepting IPC clients" >&2
 		exit 1
 	fi
+	attempt=$((attempt + 1))
+	if test "$attempt" -ge 50; then
+		echo "bench.sh: daemon did not accept IPC clients within 10 seconds" >&2
+		exit 1
+	fi
+	sleep 0.2
+done
 
 # warm up the renderer
 ./bench/bench bench/bench.keys 100