编译命令

这里以hi3516dv300开发板为例来分析，编译命令如下

./build.sh --product-name rk3568 --ccache -v

编译过程分析

当前标准系统编译入口是bash脚本，里面调用python脚本，最终调用gn/ninja + makefile/make
整体执行流程如下

build.sh
    |==> build/scripts/entry.py
        |==> build/lite/build.py   # set_root_path的时候调用config.root_path创建编译配置文件ohos_config.json
            |==> build/lite/hb/__main__.py #由上级传入build参数，即调用hb的build命令
                |==> build/lite/hb_internal/build/build.py (build.exec_command)
                    |==> build/lite/hb_internal/set/set.py (set_product)
                        |==> build/lite/hb_internal/common/product.py (get_product_info) # 先在vendor/<company_name>/<product_name>/下查找config.json
                                                                                         # 如果上面文件找不到，则查找productdefine/common/products/<product_name>.json
                        |==> # 找到对应配置文件之后，通过Config类修改ohos_config.json
                    |==> build/lite/hb_internal/build/build_process.py (Build.build)
                        |==> build/lite/hb_internal/common/misc.py (PreBuild.prepare)  # 设置ccache，以及重命名日志文件
                        |==> build/lite/hb_internal/preloader/preloader.py (Preloader.run) # 生成out/preloader/<product_name>/目录
                                                                                           # 读取build/subsystem_config.json，生成out/preloader/<product_name>/subsystem_config.json
                                                                                           # 读取productdefine/common/products/<product_name>.json，
                                                                                           #    生成parts.json、features.json、build.prop、build_config.json、build_gnargs.prop、platforms.build
                        |==> Build.gn_build 
                        |==> Build.ninja_build
                        |==> build/lite/hb_internal/common/misc.py (PostBuild.clean)

gn 命令

上面的编译命令最终组成的gn命令如下

gn_cmd = ['gn', 'gen', 
          '--args=product_path="/home/openharmony/productdefine/common/products"
                  product_name="rk3568"
                  device_name="rk3568"
                  target_cpu="arm"
                  target_os="ohos"
                  is_standard_system=true
                  device_path="device/hihope/build"
                  ohos_kernel_type="linux"
                  ohos_build_type="debug"
                  ohos_build_time="1644821637531"
                  ohos_build_datetime="2022-02-14 06:53:57"
                  ohos_build_enable_ccache=true',
          '/home/openharmony/out/rk3568']

ninja命令

上面的编译命令最终组成的ninja命令如下:

ninja_cmd = ['ninja', '-w', 'dupbuild=warn', '-C', '/home/openharmony/out/rk3568', '-v', 'images']