ccollins476ad edited a comment on issue #260: [RFC] `$import` directive URL: https://github.com/apache/mynewt-newt/pull/260#issuecomment-457392854 Thanks @benmccrea, those are good questions. It turns out my testing of this feature left much to be desired; I discovered a bug while coming up with a response! I have pushed the fix. I am using different settings here than the specific ones you asked about (`OS_DEBUG_MODE`->`HAL_FLASH_VERIFY_ERASES`, `OICMGR_TRANS_SECURITY`->`HAL_FLASH_VERIFY_BUF_SZ`). This allows a more basic target with a simpler syscfg. ## Setup 1 There are three files: #### `targets/my_blinky_sim/syscfg.yml`: ``` $import: - 'misc/importa.yml' - 'misc/importb.yml' syscfg.vals: HAL_FLASH_VERIFY_ERASES: 1 ``` #### `misc/importa.yml`: ``` syscfg.vals: HAL_FLASH_VERIFY_BUF_SZ: 32 ``` #### `misc/importb.yml`: ``` syscfg.vals: HAL_FLASH_VERIFY_BUF_SZ: 16 ``` Newt generated the following HAL syscfg for this target: ``` [@apache-mynewt-core/hw/hal] HAL_FLASH_VERIFY_BUF_SZ: 16 (overridden by targets/my_blinky_sim) HAL_FLASH_VERIFY_ERASES: 1 (overridden by targets/my_blinky_sim) HAL_FLASH_VERIFY_WRITES: 0 ``` If we reverse the order of the imports (i.e., `importb` before `importa`), then the syscfg changes: ``` [@apache-mynewt-core/hw/hal] HAL_FLASH_VERIFY_BUF_SZ: 32 (overridden by targets/my_blinky_sim) HAL_FLASH_VERIFY_ERASES: 1 (overridden by targets/my_blinky_sim) HAL_FLASH_VERIFY_WRITES: 0 ``` So, import order matters, which I think is the correct behavior. This is something that should be documented. Imports are processed in the specified order, then the importing file is processed. ## Setup 2 Two files: #### `targets/my_blinky_sim/syscfg.yml`: ``` $import: - 'misc/importa.yml' syscfg.vals: HAL_FLASH_VERIFY_ERASES: 1 ``` #### `misc/importa.yml`: ``` syscfg.vals: HAL_FLASH_VERIFY_ERASES: 0 ``` Newt generated the following HAL syscfg for this target: ``` [@apache-mynewt-core/hw/hal] HAL_FLASH_VERIFY_BUF_SZ: 16 HAL_FLASH_VERIFY_ERASES: 1 (overridden by targets/my_blinky_sim) HAL_FLASH_VERIFY_WRITES: 0 ```
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