CLI-based Quick Fix Development

You can use the command-line tool to develop a quick fix file, an expeditious approach to resolve application bugs. In this document, an application with the bundle name of com.ohos.quickfix in version 1000000 is used as an example to describe how to develop a quick fix file with the command-line tool.

Writing the patch.json File

Write a patch.json file that meets your project requirements and place it in any directory of the project. (Configuring the patch.json file is not supported in DevEco Studio.) Create a patch.json file on the local computer. Below is an example of the file content:

{
    "app" : {
        "bundleName" : "com.ohos.quickfix",
        "versionCode": 1000000, // Application version
        "versionName" : "1.0.0.1",
        "patchVersionCode": 1000000, // Patch version
        "patchVersionName" : "1.0.0.1"
    },
    "module" : {
        "name" : "entry",
        "type" : "patch",
        "deviceTypes" : [
            "default",
            "tablet"
        ],
        "originalModuleHash": "11223344556677889900" // SHA-256 value of the HAP file to restore
    }
}

Generating a Quick Fix File

Quick Fix for TS Code

• After modifying the TS code file in DevEco Studio and build it into a HAP file, you can find the corresponding .abc file in the project directory, for example, build\default\cache\default\LegacyCompileETS\jsbundle\temporary\pages\index.abc.

Quick Fix for C++ Code

• In DevEco Studio, build the original C++ code into a .so file. Fix bugs in the code and rebuild the code into a new .so file. You can find this .so file in the project directory, for example, build\default\intermediates\libs\default\arm64-v8a\libentry.so.
• Locate the diff.exe tool in the toolchains folder in the local OpenHarmony SDK path. Use this tool to generate a quick fix .so file based on the old and new .so files. The command is as follows:

$ diff.exe -s Example.z.so -d Example.z.so -p Example.z.so.diff

The command contains the following options:

• -s: path to the old .so file
• -d: path to the new .so file
• -p: path of the generated differential file

Generating a Quick Fix File in .hqf Format

With the preceding patch.json, .abc, and .so files, run the following command to generate an .hqf file using the app_packing_tool.jar tool in the toolchains folder in the local OpenHarmony SDK path:

$ java -jar app_packing_tool.jar --mode hqf --json-path patch.json --lib-path libs --ets-path patchs --out-path entry-default-unsigned.hqf --force true

The command contains the following options.

Signing the Quick Fix File

Use the hapsigner tool to sign the entry-default-unsigned.hqf file, in the same way you sign a HAP file. To be specific, run the following command to use hap-sign-tool.jar in the toolchains folder in the local OpenHarmony SDK path:

$ java -jar hap-sign-tool.jar sign-app -keyAlias "OpenHarmony Application Release" -signAlg "SHA256withECDSA" -mode "localSign" -appCertFile "OpenHarmonyApplication.pem" -profileFile "ohos_provision_release.p7b" -inFile "entry-default-unsigned.hqf" -keystoreFile "OpenHarmony.p12" -outFile "entry-signed-release.hqf" -keyPwd "123456" -keystorePwd "123456"

Installing the Quick Fix File

Push the entry-signed-release.hqf file to the device.

hdc.exe file send .\entry-signed-release.hqf /data/

Run the following command to install the quick fix file as a patch:

$ bm quickfix -a -f /data/entry-signed-release.hqf

The complete commands are as follows:

$ bm quickfix -h
usage: bm quickfix <options>
options list:
-h, --help                                   list available commands
-q, --query                                  indicates query quickfix, used with -b or --bundle-name
-b, --bundle-name <bundle-name>              query quickfix status and information by a specified bundle name
-a, --apply                                  indicates apply quickfix, used with -f or --file-path
-f, --file-path <file-path>                  apply a quickfix file by a specified path
-f, --file-path <file-path> <file-path> ...  apply some quickfix files of one bundle
-f, --file-path <bundle-direction>           apply quickfix files by direction, under which are quickfix files