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[shell] Reduce memory usage and boileplate code for subcommands #33243
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PR #33243: Size comparison from 416f6a3 to 7cb236a Increases (3 builds for linux)
Decreases (12 builds for cyw30739, efr32, esp32, linux, telink)
Full report (71 builds for bl602, bl702, bl702l, cc13x4_26x4, cc32xx, cyw30739, efr32, esp32, linux, mbed, nrfconnect, nxp, psoc6, qpg, stm32, telink)
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May 14, 2024
1. Add lightweight CommandSet class to prevent instantiating Shell::Engine, which allows for dynamic command registration, just to create a subshell with a fixed number of subcommands. This slightly reduces the RAM usage. Additionally, the command set automatically prints the help texts if no command or "help" command has been submitted. 2. Add SubShellCommand templatized command handler to remove the boilerplate associated with creating a subshell.
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PR #33243: Size comparison from f4e02d4 to 47b8d45 Increases (3 builds for linux)
Decreases (21 builds for cyw30739, efr32, esp32, linux, telink)
Full report (81 builds for bl602, bl702, bl702l, cc13x4_26x4, cc32xx, cyw30739, efr32, esp32, linux, mbed, nrfconnect, nxp, psoc6, qpg, stm32, telink)
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Add lightweight
CommandSet
class to prevent instantiatingShell::Engine
, which allows for dynamic command registration, just to create a subshell with a fixed number of subcommands.This slightly reduces the RAM usage. Additionally, the command set automatically prints the help texts if no command or "help" command has been submitted.
Add SubShellCommand templatized command handler to remove the boilerplate associated with creating a subshell.