一、 ota差分包制作命令及结果如下：

packaging_tools$ python3 build_update.py ./target_package/ ./output_package/ -s ./source_package/ -pk ./target_package/rsa_private_key2048.pem
2023-12-07 10:05:38 INFO : VERSION.mbn file parsing complete! path: ./target_package/updater_config/VERSION.mbn
2023-12-07 10:05:38 INFO : BOARD.list file parsing complete! path: ./target_package/updater_config/BOARD.list
2023-12-07 10:05:38 INFO : XML file parsing completed!
2023-12-07 10:05:38 INFO : []
2023-12-07 10:05:38 ERROR : Uncaught exception
Traceback (most recent call last):
  File "build_update.py", line 897, in <module>
    main()
  File "build_update.py", line 861, in main
    if incremental_processing(
  File "build_update.py", line 757, in incremental_processing
    if increment_image_processing(
  File "build_update.py", line 654, in increment_image_processing
    IncUpdateImage(each_src_image_path, each_src_map_path)
  File "/home/xxx/ohos/OpenHarmony_v4.0_release/base/update/packaging_tools/image_class.py", line 128, in __init__
    self.parse_raw_image_file(image_path, map_path)
  File "/home/xxx/ohos/OpenHarmony_v4.0_release/base/update/packaging_tools/image_class.py", line 167, in parse_raw_image_file
    self.parse_block_map_file(map_path, f_r)
  File "/home/xxx/ohos/OpenHarmony_v4.0_release/base/update/packaging_tools/image_class.py", line 188, in parse_block_map_file
    raise RuntimeError
RuntimeError
2023-12-07 10:05:38 INFO : Exception occurred, Resource cleaning completed!

二、packaging_tools部分目录结构如下：

packaging_tools/
├── lib
│   ├── diff                #取自out/rk3568/clang_x64/updater/updater/
│   ├── e2fsck           #及以下.so文件取自out/rk3568/clang_x64/thirdparty/e2fsprogs
│   ├── e2fsdroid
│   ├── libext2_blkid.so
│   ├── libext2_com_err.so
│   ├── libext2_e2p.so
│   ├── libext2_misc.so
│   ├── libext2_quota.so
│   ├── libext2_uuid.so
│   ├── libext2fs.so
│   └── mke2fs
├── output_package
│   └── updater_full.zip  #全量升级验证成功
├── sign_cert
│   └── signing_cert.crt   #取自base/update/updater/test/unittest/test_data/src/signing_cert.crt
├── signature
├── source_package   #由上一次编译全量包对应的target_package  copy而来
│   ├── MiniLoaderAll.bin
│   ├── boot_linux.img
│   ├── chip_prod.img
│   ├── config.cfg
│   ├── eng_system.img
│   ├── parameter.txt
│   ├── ramdisk.img
│   ├── resource.img
│   ├── rsa_private_key2048.pem
│   ├── sys_prod.img
│   ├── system.img
│   ├── uboot.img
│   ├── updater.img
│   ├── updater_binary
│   ├── updater_config
│   │   ├── BOARD.list
│   │   ├── VERSION.mbn   #version: 4.0.10.15
│   │   └── updater_specified_config.xml    #fileVersion=02, softVersion=4.0.10.15 compType=0
│   ├── userdata.img
│   ├── vendor.img
│   └── vendor.map
├── target_package   #添加修改，编译后，更新imgs和updater_config配置
│   ├── MiniLoaderAll.bin
│   ├── boot_linux.img
│   ├── chip_prod.img
│   ├── config.cfg
│   ├── eng_system.img
│   ├── parameter.txt
│   ├── ramdisk.img
│   ├── resource.img
│   ├── rsa_private_key2048.pem
│   ├── sys_prod.img
│   ├── system.img
│   ├── uboot.img
│   ├── updater.img
│   ├── updater_binary
│   ├── updater_config
│   │   ├── BOARD.list   #version: 4.0.10.15
│   │   ├── VERSION.mbn
│   │   └── updater_specified_config.xml    #fileVersion=02, softVersion=4.0.10.16 compType=1
│   ├── userdata.img
│   ├── vendor.img
│   └── vendor.map

三、target_package和source_package对比差异如下：

diff target_package/ source_package/
Binary files target_package/boot_linux.img and source_package/boot_linux.img differ
Binary files target_package/chip_prod.img and source_package/chip_prod.img differ
Binary files target_package/eng_system.img and source_package/eng_system.img differ
Binary files target_package/ramdisk.img and source_package/ramdisk.img differ
Binary files target_package/resource.img and source_package/resource.img differ
Binary files target_package/sys_prod.img and source_package/sys_prod.img differ
Binary files target_package/system.img and source_package/system.img differ
Binary files target_package/updater.img and source_package/updater.img differ
Common subdirectories: target_package/updater_config and source_package/updater_config
Binary files target_package/userdata.img and source_package/userdata.img differ
Binary files target_package/vendor.img and source_package/vendor.img differ

diff target_package/updater_config/ source_package/updater_config/
diff target_package/updater_config/updater_specified_config.xml source_package/updater_config/updater_specified_config.xml
4c4
<         <info fileVersion="02" prdID="123456" softVersion="OpenHarmony 4.0.10.16" date="2023-12-06" time="18:30">head info</info>
---
>         <info fileVersion="02" prdID="123456" softVersion="OpenHarmony 4.0.10.15" date="2023-12-06" time="11:30">head info</info>
7,8c7,8
<       <component compAddr="vendor" compId="12" resType="05" compType="1" compVer="1.0">./vendor.img</component>
<       <component compAddr="system" compId="18" resType="05" compType="1" compVer="1.0">./system.img</component>
---
>       <component compAddr="vendor" compId="12" resType="05" compType="0" compVer="1.0">./vendor.img</component>
>       <component compAddr="system" compId="18" resType="05" compType="0" compVer="1.0">./system.img</component>

四、已解决

上述报错问题已解决，处理方式参见评论沟通记录，OTA制作及验证步骤参考：OpenHarmony 4.0 OTA本地升级