How to remove unused libraries from app while doing local or online build?

General
#1

  1. My goal is: When using the mongoose-os mjs app environment, I see list of libraries (thru ‘mos ls’ command) that are added to the device while flashing the code. I want to remove/stop the compiler from adding the libraries to my code.

  2. My actions are: I have tried fiddling with the mos.yml file. I tried to remove the library - origin: https://github.com/mongoose-os-libs/js-demo-bundle (because I think it adds all the libraries in bundle) and tried to include the github paths of the only libraries that i am using such as

    Issue
    Issue.png3466×1598 247 KB

  3. The result I see is: The result shows some error with file fetching thru build_ctx file.

  4. My expectation & question is: I just want to remove the libraries that I am not using and only add the one which I am using in my code. I tried to build both online and local but with no luck. Please guide me.

#2

Try to manually delete with mos rm filename all modules you won’t use and then build with --clean flag and flash, maybe it works

1 Like
#3

Thanks for the suggestion. I think that when we give mos rm , it just removes the file from the device itself and does not affect the build configuration/files. I tried your suggestion but it did not work.

#4

Ok, next suggestion: maybe the cause is in the mos.yml - section config_schema? Try to remove i2c.enable if you not include path to i2c lib)

1 Like
#5

I am afraid that might not work as config schema is just for setting configurations . Perhaps @nliviu can guide us here on how to remove libraries…

#6

I always include in my applications the following libraries:

libs:
  - origin: https://github.com/mongoose-os-libs/rpc-service-config
  - origin: https://github.com/mongoose-os-libs/rpc-service-fs
  - origin: https://github.com/mongoose-os-libs/rpc-uart
  - origin: https://github.com/mongoose-os-libs/rpc-ws
  - origin: https://github.com/mongoose-os-libs/wifi
  - origin: https://github.com/mongoose-os-libs/sntp
  - origin: https://github.com/mongoose-os-libs/ota-http-server

rpc-* for the RPC services over uart and websocket, wifi for network connectivity, sntp for time synchronization, ota-http-server to push OTA updates after the first flash of the application.

If I need mqtt, I add in the libs section

  - origin: https://github.com/mongoose-os-libs/mqtt

and in the config_schema

  - ["mqtt.enable", true]
  - ["mqtt.server", "my_mqtt_server:port"]  #port may be omitted. It defaults to 1883

If I need i2c and/or spi, I add the library, enable it and add the pin definitions.
E.g:

  - ["i2c.enable", true]

conds:
  - when: mos.platform == "esp32"
    apply:
      config_schema:
        - ["i2c1.enable", false]
        - ["i2c.sda_gpio", 32]
        - ["i2c.scl_gpio", 33]
  - when: mos.platform == "esp8266"
    apply:
      config_schema:
        - ["i2c.sda_gpio", 12]
        - ["i2c.scl_gpio", 14]
2 Likes
#7

I think I found what you need: https://github.com/mongoose-os-libs/mjs/issues/5 (see case and example)