From f255b25a2e84cee794bf299190546edde1456ab3 Mon Sep 17 00:00:00 2001
From: Sean Du <do4suki@gmail.com>
Date: Wed, 3 Jun 2026 01:34:40 +0800
Subject: [PATCH] Build binary only when missing

Signed-off-by: Sean Du <do4suki@gmail.com>
---
 doc/3.md |  2 +-
 run.sh   | 10 +++++++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/doc/3.md b/doc/3.md
index 70662ca..cd4e122 100644
--- a/doc/3.md
+++ b/doc/3.md
@@ -20,7 +20,7 @@
 
 说明：
 
-- `start` 会自动执行 `go build -o honoka-chan main.go`，然后以 `nohup` 后台运行。
+- `start` 会以 `nohup` 后台运行 `honoka-chan`，如果可执行文件不存在则自动执行 `go build -o honoka-chan main.go`。
 - PID 文件：`temp/run/honoka-chan.pid`
 - 日志文件：`temp/run/honoka-chan.log`
 
diff --git a/run.sh b/run.sh
index dcaf126..5912438 100755
--- a/run.sh
+++ b/run.sh
@@ -35,7 +35,15 @@ start_app() {
     return 0
   fi
 
-  build_app
+  if [[ ! -f "$APP_BIN" ]]; then
+    build_app
+  fi
+
+  if [[ ! -x "$APP_BIN" ]]; then
+    echo "honoka-chan binary is not executable: $APP_BIN"
+    exit 1
+  fi
+
   nohup "$APP_BIN" >>"$LOG_FILE" 2>&1 &
   local pid=$!
   echo "$pid" >"$PID_FILE"