```

feat(bash): 支持通过环境变量设置OSS对象键名

- 添加 ALIYUN_OSS_OBJECT_KEY 环境变量作为 --key 参数的默认值
- 更新 README.md 文档，添加新的环境变量说明和示例
- 修改验证逻辑，当 OBJECT_KEY 为空时检查环境变量
- 脚本现在会显示本地文件的 sha256、文件大小和目标 object-key
```

Author: mudssky

scripts/bash/README.md

@@ -63,6 +63,7 @@
 - `ALIYUN_ACCESS_KEY_SECRET`
 - `ALIYUN_SECURITY_TOKEN`
 - `ALIYUN_OSS_BUCKET`
+- `ALIYUN_OSS_OBJECT_KEY`
 - `ALIYUN_OSS_REGION`
 - `ALIYUN_OSS_HOST`
 - `ALIYUN_OSS_CONTENT_TYPE`
@@ -106,6 +107,7 @@
 ALIYUN_ACCESS_KEY_ID=your-access-key-id
 ALIYUN_ACCESS_KEY_SECRET=your-access-key-secret
 ALIYUN_OSS_BUCKET=examplebucket
+ALIYUN_OSS_OBJECT_KEY=demo/demo.txt
 ALIYUN_OSS_REGION=cn-hangzhou
 ALIYUN_OSS_HOST=examplebucket.oss-cn-hangzhou.aliyuncs.com
 ```
@@ -119,10 +121,11 @@ ALIYUN_SECURITY_TOKEN=your-sts-token
 
 ```bash
 ./scripts/bash/aliyun-oss-put.sh \
-  --file ./demo.txt \
-  --key demo/demo.txt
+  --file ./demo.txt
 ```
 
+如果你在命令行里显式传了 `--key`，它的优先级仍然高于 `ALIYUN_OSS_OBJECT_KEY`。
+
 脚本会在发起上传前打印本地文件的 `sha256`、文件大小和目标 `object-key`，方便排查“传错文件”“内容被修改”这类问题。
 
 ### Host 说明

scripts/bash/aliyun-oss-put.sh

@@ -93,6 +93,7 @@ Environment variables:
   ALIYUN_ACCESS_KEY_SECRET
   ALIYUN_SECURITY_TOKEN     Optional STS token.
   ALIYUN_OSS_BUCKET         Optional default for --bucket.
+  ALIYUN_OSS_OBJECT_KEY     Optional default for --key.
   ALIYUN_OSS_REGION         Optional default for --region.
   ALIYUN_OSS_HOST           Optional default for --host.
   ALIYUN_OSS_CONTENT_TYPE   Optional default for --content-type.
@@ -317,6 +318,10 @@ apply_environment_defaults() {
         BUCKET_NAME="$ALIYUN_OSS_BUCKET"
     fi
 
+    if [ -z "$OBJECT_KEY" ] && [ -n "${ALIYUN_OSS_OBJECT_KEY:-}" ]; then
+        OBJECT_KEY="$ALIYUN_OSS_OBJECT_KEY"
+    fi
+
     if [ -z "$REGION_ID" ] && [ -n "${ALIYUN_OSS_REGION:-}" ]; then
         REGION_ID="$ALIYUN_OSS_REGION"
     fi
@@ -354,7 +359,7 @@ normalize_target() {
 validate_inputs() {
     [ -n "$FILE_PATH" ] || die 1 "--file is required"
     [ -n "$BUCKET_NAME" ] || die 1 "--bucket is required or set ALIYUN_OSS_BUCKET"
-    [ -n "$OBJECT_KEY" ] || die 1 "--key is required"
+    [ -n "$OBJECT_KEY" ] || die 1 "--key is required or set ALIYUN_OSS_OBJECT_KEY"
     [ -n "$REGION_ID" ] || die 1 "--region is required or set ALIYUN_OSS_REGION"
     [ -n "$HOST_INPUT" ] || die 1 "--host is required or set ALIYUN_OSS_HOST"
     [ -n "${ALIYUN_ACCESS_KEY_ID:-}" ] || die 1 "ALIYUN_ACCESS_KEY_ID is required"